:root {
  --course-ink: #101b35;
  --course-ink-soft: #3f4f6d;
  --course-muted: #65718a;
  --course-line: #d9e0ec;
  --course-line-strong: #b8c4d8;
  --course-surface: #ffffff;
  --course-canvas: #f4f7fc;
  --course-blue: #2459d9;
  --course-blue-hover: #1949bd;
  --course-blue-deep: #1647bd;
  --course-blue-soft: #e9efff;
  --course-green: #08794f;
  --course-green-soft: #e4f6ee;
  --course-amber: #946000;
  --course-amber-soft: #fff2cc;
  --course-danger: #b63e25;
  --course-danger-soft: #fde9e4;
  --course-header: rgba(255, 255, 255, 0.94);
  --course-action-bar: rgba(255, 255, 255, 0.97);
  --course-entry-layer: #f7f9fd;
  --course-disabled: #e9edf3;
  --course-disabled-ink: #65718a;
  --course-shadow: 0 18px 52px rgba(20, 38, 77, 0.11);
  --course-card-shadow: 0 14px 34px rgba(20, 38, 77, 0.09);
  --fept-card-ink: #101b35;
  --fept-card-muted: #4b5d79;
  --fept-card-border: #c7d3e6;
  --fept-card-background-start: #fbfdff;
  --fept-card-background-end: #edf3fb;
  --fept-card-shadow: 0 22px 58px rgba(20, 38, 77, 0.13);
  --fept-node-background: #ffffff;
  --fept-node-inset: rgba(36, 89, 217, 0.035);
  --fept-node-shadow: rgba(20, 38, 77, 0.13);
  --fept-icon-ink: #101b35;
  --fept-icon-border: #f7faff;
  --fept-icon-shadow: rgba(20, 38, 77, 0.16);
  --fept-connector: #60769d;
  --fept-return: #6078a6;
  --fept-flashcards: #3157c8;
  --fept-flashcards-soft: #dbe4ff;
  --fept-explainers: #08708f;
  --fept-explainers-soft: #d8f7ff;
  --fept-practice: #7448b5;
  --fept-practice-soft: #eee2ff;
  --fept-timed: #08794f;
  --fept-timed-soft: #d9fae9;
}

.course-manual-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
  padding: 9px 0;
  color: var(--course-blue-deep);
  font-size: .9rem;
  font-weight: 650;
  text-underline-offset: .22em;
}

[data-theme="dark"] {
  --course-ink: #f4f7ff;
  --course-ink-soft: #bcc7dc;
  --course-muted: #8996b0;
  --course-line: #253149;
  --course-line-strong: #3a4967;
  --course-surface: #101827;
  --course-canvas: #070d19;
  --course-blue: #5277e7;
  --course-blue-hover: #456cdd;
  --course-blue-deep: #8aa5ff;
  --course-blue-soft: #17264b;
  --course-green: #37cf91;
  --course-green-soft: #102f28;
  --course-amber: #ffc857;
  --course-amber-soft: #352813;
  --course-danger: #ff8d6d;
  --course-danger-soft: #3b1f1b;
  --course-header: rgba(7, 13, 25, 0.94);
  --course-action-bar: rgba(7, 13, 25, 0.96);
  --course-entry-layer: #0c1422;
  --course-disabled: #151d2b;
  --course-disabled-ink: #8996b0;
  --course-shadow: 0 18px 52px rgba(0, 0, 0, 0.32);
  --course-card-shadow: 0 14px 34px rgba(0, 0, 0, 0.2);
  --fept-card-ink: #f7f9ff;
  --fept-card-muted: #c7d1e3;
  --fept-card-border: #263755;
  --fept-card-background-start: #111c2e;
  --fept-card-background-end: #0a1220;
  --fept-card-shadow: 0 22px 58px rgba(7, 13, 25, 0.24);
  --fept-node-background: #0b1424;
  --fept-node-inset: rgba(255, 255, 255, 0.015);
  --fept-node-shadow: rgba(0, 0, 0, 0.18);
  --fept-icon-ink: #091221;
  --fept-icon-border: #0d1727;
  --fept-icon-shadow: rgba(0, 0, 0, 0.22);
  --fept-connector: #93a7cc;
  --fept-return: #7f98c6;
  --fept-flashcards: #6f8cff;
  --fept-flashcards-soft: #dbe4ff;
  --fept-explainers: #37c5eb;
  --fept-explainers-soft: #d8f7ff;
  --fept-practice: #a774f5;
  --fept-practice-soft: #eee2ff;
  --fept-timed: #55d99b;
  --fept-timed-soft: #d9fae9;
}

html[data-course-entry="true"] body,
.course-page {
  color-scheme: light;
  background:
    radial-gradient(circle at 72% 8%, rgba(62, 108, 255, 0.11), transparent 28rem),
    var(--course-canvas);
}

[data-theme="dark"] body.course-page,
html[data-theme="dark"][data-course-entry="true"] body {
  color-scheme: dark;
}

html[data-course-entry="true"] #cloud-sync-toggle,
html[data-course-entry="true"] .practice-settings-toggle,
html[data-course-entry="true"] #exam-access-banner {
  display: none !important;
}

html[data-course-entry="true"] .topbar {
  min-height: 68px;
  padding: 0.75rem clamp(1rem, 4vw, 3.5rem);
  border-bottom: 1px solid var(--course-line);
  background: var(--course-header);
  box-shadow: none;
}

html[data-course-entry="true"] .brand-cluster {
  flex: 1;
}

html[data-course-entry="true"] .brand-menu {
  gap: 1rem;
}

html[data-course-entry="true"] .exam-header-title {
  padding-left: 1rem;
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

html[data-course-entry="true"] .exam-header-title::before {
  top: 0;
  bottom: 0;
  width: 1px;
  border-radius: 0;
  background: var(--course-line-strong);
}

html[data-course-entry="true"] .topbar-meta {
  margin-left: auto;
}

.course-exam-entry {
  width: min(1160px, calc(100% - 2rem));
  margin: clamp(1.5rem, 3vw, 2.25rem) auto 4rem;
  color: var(--course-ink);
}

.course-exam-entry-hero {
  position: relative;
  display: block;
}

.course-entry-summary-card {
  position: relative;
  z-index: 1;
  display: flex;
  width: min(1060px, calc(100% - 56px));
  min-height: 470px;
  margin: 0 auto;
  padding: 8px clamp(2rem, 6vw, 4.5rem) 28px;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border: 1px solid var(--course-line-strong);
  border-radius: 24px;
  background: var(--course-surface);
  box-shadow: var(--course-shadow);
}

.course-entry-summary-card::before,
.course-entry-summary-card::after {
  position: absolute;
  z-index: -1;
  inset: 10px -10px -10px 10px;
  content: "";
  pointer-events: none;
  border: 1px solid var(--course-line);
  border-radius: inherit;
  background: var(--course-entry-layer);
}

.course-entry-summary-card::after {
  z-index: -2;
  inset: 20px -20px -20px 20px;
  opacity: 0.58;
}

.course-entry-summary-art {
  width: min(340px, 72vw);
  height: 235px;
  margin: -6px 0 -24px;
  object-fit: contain;
  filter: drop-shadow(0 20px 22px rgba(20, 38, 77, 0.18));
}

.course-entry-summary-card h1 {
  margin: 0;
  color: var(--course-ink);
  font-size: clamp(2.1rem, 4.2vw, 3rem);
  letter-spacing: -0.05em;
}

.course-entry-summary-copy {
  margin: 0.35rem 0 1.05rem;
  color: var(--course-ink-soft);
  font-size: clamp(0.98rem, 1.8vw, 1.12rem);
  line-height: 1.5;
}

.course-entry-progress {
  display: grid;
  width: min(540px, 100%);
  gap: 0.55rem;
}

.course-entry-progress strong {
  color: var(--course-muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.course-entry-progress-track {
  width: 100%;
  height: 9px;
  overflow: hidden;
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: var(--course-disabled);
}

.course-entry-progress-track::-webkit-progress-bar {
  border-radius: 999px;
  background: var(--course-disabled);
}

.course-entry-progress-track::-webkit-progress-value,
.course-entry-progress-track::-moz-progress-bar {
  border-radius: 999px;
  background: var(--course-blue);
}

.course-kicker {
  margin: 0 0 0.7rem;
  color: var(--course-blue-deep);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.course-exam-entry-actions {
  display: flex;
  width: 100%;
  margin-top: 0.8rem;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.8rem 1rem;
}

.course-primary-action,
.course-secondary-action,
.lesson-primary-action {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  min-height: 50px;
  padding: 0.8rem 1.2rem;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 820;
  text-decoration: none;
  border: 1px solid var(--course-blue);
  border-radius: 12px;
  background: var(--course-blue);
  cursor: pointer;
  transition: transform 150ms ease, background-color 150ms ease, border-color 150ms ease;
}

.course-exam-entry-actions .course-primary-action {
  width: min(100%, 40rem);
  min-height: 60px;
  padding: 1rem 1.75rem;
  font-size: 1.05rem;
  border-radius: 999px;
}

.course-primary-action::after,
.lesson-primary-action::after {
  position: absolute;
  inset: 0;
  content: "";
  pointer-events: none;
  background: linear-gradient(110deg, transparent 20%, rgba(255, 255, 255, 0.2) 47%, transparent 74%);
  transform: translateX(-120%);
  transition: transform 420ms ease;
}

.course-primary-action:hover::after,
.lesson-primary-action:hover::after {
  transform: translateX(120%);
}

.course-primary-action:hover,
.lesson-primary-action:hover {
  color: #fff;
  border-color: var(--course-blue-hover);
  background: var(--course-blue-hover);
  transform: translateY(-1px);
}

.course-primary-action:focus-visible,
.course-secondary-action:focus-visible,
.lesson-primary-action:focus-visible,
.course-page a:focus-visible,
.course-page button:focus-visible,
.course-page textarea:focus-visible,
.course-page input:focus-visible {
  outline: 3px solid #ffbf47;
  outline-offset: 3px;
}

.course-entry-storage {
  display: block;
  margin-top: 0.55rem;
  color: var(--course-muted);
  font-size: 0.78rem;
}

.course-entry-fept-formula {
  display: grid;
  margin-top: 2.5rem;
  padding: clamp(1.6rem, 4vw, 2.8rem);
  grid-template-columns: minmax(220px, 0.72fr) minmax(0, 1.8fr);
  grid-template-areas:
    "copy diagram"
    "return return";
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3rem);
  color: var(--fept-card-ink);
  border: 1px solid var(--fept-card-border);
  border-radius: 26px;
  background: linear-gradient(145deg, var(--fept-card-background-start) 0%, var(--fept-card-background-end) 100%);
  box-shadow: var(--fept-card-shadow);
}

.course-entry-fept-copy {
  display: grid;
  grid-area: copy;
  align-content: center;
  gap: 0.8rem;
}

.course-entry-fept-copy h2 {
  margin: 0;
  color: var(--fept-card-ink);
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.course-entry-fept-copy > p:not(.course-entry-fept-tagline) {
  max-width: 26rem;
  margin: 0;
  color: var(--fept-card-muted);
  font-size: clamp(0.94rem, 1.5vw, 1.08rem);
  line-height: 1.55;
}

.course-entry-fept-tagline {
  display: flex;
  margin: 0;
  flex-wrap: wrap;
  gap: 0.32rem;
  font-size: clamp(1rem, 1.9vw, 1.24rem);
  font-weight: 850;
  letter-spacing: -0.025em;
}

.course-entry-fept-tagline span:nth-child(1) { color: var(--fept-flashcards); }
.course-entry-fept-tagline span:nth-child(2) { color: var(--fept-explainers); }
.course-entry-fept-tagline span:nth-child(3) { color: var(--fept-practice); }
.course-entry-fept-tagline span:nth-child(4) { color: var(--fept-timed); }

.course-entry-fept-diagram {
  display: grid;
  margin: 0;
  padding: 0;
  grid-area: diagram;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(0.8rem, 1.8vw, 1.8rem);
  list-style: none;
}

.course-entry-fept-diagram li {
  --fept-accent: var(--fept-flashcards);
  --fept-accent-soft: var(--fept-flashcards-soft);
  position: relative;
  display: grid;
  min-width: 0;
  justify-items: center;
  align-content: start;
  gap: 0.8rem;
  text-align: center;
}

.course-entry-fept-diagram li.is-explainers {
  --fept-accent: var(--fept-explainers);
  --fept-accent-soft: var(--fept-explainers-soft);
}

.course-entry-fept-diagram li.is-practice {
  --fept-accent: var(--fept-practice);
  --fept-accent-soft: var(--fept-practice-soft);
}

.course-entry-fept-diagram li.is-timed {
  --fept-accent: var(--fept-timed);
  --fept-accent-soft: var(--fept-timed-soft);
}

.course-entry-fept-node {
  position: relative;
  display: grid;
  width: clamp(96px, 9.5vw, 132px);
  aspect-ratio: 1;
  place-items: center;
  color: var(--fept-accent);
  border: 2px solid var(--fept-accent);
  border-radius: 50%;
  background: color-mix(in srgb, var(--fept-accent) 7%, var(--fept-node-background));
  box-shadow: inset 0 0 0 8px var(--fept-node-inset), 0 18px 38px var(--fept-node-shadow);
}

.course-entry-fept-letter {
  font-size: clamp(3.7rem, 6vw, 5.5rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.07em;
}

.course-entry-fept-icon {
  position: absolute;
  right: -7px;
  bottom: -5px;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--fept-icon-ink);
  border: 4px solid var(--fept-icon-border);
  border-radius: 50%;
  background: var(--fept-accent-soft);
  box-shadow: 0 8px 18px var(--fept-icon-shadow);
}

.course-entry-fept-icon-svg {
  width: 22px;
  height: 22px;
}

.course-entry-fept-stage-copy {
  display: grid;
  min-width: 0;
  gap: 0.25rem;
}

.course-entry-fept-stage-copy small {
  color: var(--fept-accent);
  font-size: 0.7rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.course-entry-fept-stage-copy strong {
  color: var(--fept-card-ink);
  font-size: clamp(1.05rem, 1.7vw, 1.4rem);
  letter-spacing: -0.035em;
}

.course-entry-fept-stage-copy p {
  max-width: 15rem;
  margin: 0;
  color: var(--fept-card-muted);
  font-size: clamp(0.8rem, 1.3vw, 0.94rem);
  line-height: 1.45;
}

.course-entry-fept-connector {
  position: absolute;
  top: clamp(46px, 5.5vw, 64px);
  right: clamp(-2rem, -1.8vw, -0.9rem);
  width: clamp(24px, 2.4vw, 34px);
  color: var(--fept-connector);
  transform: translateX(50%);
}

.course-entry-fept-return {
  display: grid;
  grid-area: return;
  justify-items: center;
  gap: 0.15rem;
  color: var(--fept-return);
}

.course-entry-fept-return svg {
  width: min(760px, 86%);
  height: 48px;
}

.course-entry-fept-return p {
  margin: -0.3rem 0 0;
  color: var(--fept-card-muted);
  font-size: clamp(0.82rem, 1.4vw, 0.96rem);
  text-align: center;
}

.course-entry-fept-return strong { color: var(--fept-flashcards); }

.course-entry-tool-grid {
  display: grid;
  width: min(1060px, 100%);
  margin: 2.25rem auto 0;
  grid-template-columns: repeat(4, minmax(0, 238px));
  justify-content: space-between;
  gap: 1rem;
}

.course-entry-tool-grid a {
  display: flex;
  min-height: 148px;
  padding: 0.85rem 0.75rem 1rem;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  color: var(--course-ink);
  font-size: 0.92rem;
  font-weight: 800;
  text-align: center;
  text-decoration: none;
  border: 1px solid var(--course-line);
  border-radius: 18px;
  background: var(--course-surface);
  box-shadow: 0 8px 24px rgba(20, 38, 77, 0.06);
  transition: color 150ms ease, border-color 150ms ease, background-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

.course-entry-tool-grid a:hover {
  color: var(--course-blue-deep);
  border-color: var(--course-blue);
  background: var(--course-blue-soft);
  box-shadow: 0 14px 30px rgba(36, 89, 217, 0.13);
  transform: translateY(-3px);
}

.course-entry-tool-grid a:focus-visible {
  outline: 3px solid #ffbf47;
  outline-offset: 3px;
}

.course-entry-tool-art {
  display: grid;
  width: 78px;
  height: 78px;
  place-items: center;
  filter: drop-shadow(0 8px 9px rgba(20, 38, 77, 0.12));
}

.course-entry-tool-svg {
  display: block;
  width: 100%;
  height: 100%;
}

.course-entry-tool-svg path,
.course-entry-tool-svg rect,
.course-entry-tool-svg circle {
  vector-effect: non-scaling-stroke;
}

.course-entry-art-shadow { fill: #dce6f8; }
.course-entry-art-paper { fill: #f8fbff; stroke: #aebbd1; stroke-width: 2; }
.course-entry-art-line,
.course-entry-art-network { fill: none; stroke: #2459d9; stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }
.course-entry-art-metal { fill: #8593aa; stroke: #52627a; stroke-width: 2; stroke-linejoin: round; }
.course-entry-art-accent-soft { fill: #e9efff; stroke: #b8c4d8; stroke-width: 2; }
.course-entry-art-accent { fill: #2f6fff; stroke: #1647bd; stroke-width: 1.5; }
.course-entry-art-success { fill: #37cf91; stroke: #08794f; stroke-width: 1.5; }
.course-entry-art-success-soft { fill: #8fe0bd; stroke: #08794f; stroke-width: 1.5; }
.course-entry-art-gold-soft { fill: #ffd77a; stroke: #946000; stroke-width: 1.5; }
.course-entry-art-gold { fill: #ffc857; stroke: #946000; stroke-width: 2; stroke-linejoin: round; }
.course-entry-art-gold-line { fill: none; stroke: #946000; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }
.course-entry-art-check { fill: none; stroke: #fff; stroke-width: 3; stroke-linecap: round; stroke-linejoin: round; }

[data-theme="dark"] .course-entry-tool-grid a {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
}

.course-page {
  min-width: 320px;
  margin: 0;
  color: var(--course-ink);
  font-family: Inter, "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  background:
    radial-gradient(circle at 72% 8%, rgba(62, 108, 255, 0.11), transparent 28rem),
    var(--course-canvas);
}

.course-page *,
.course-page *::before,
.course-page *::after {
  box-sizing: border-box;
}

.course-page .visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.course-page h1[tabindex="-1"]:focus {
  outline: none;
}

.course-app-shell {
  min-height: 100vh;
}

.course-app-header {
  position: sticky;
  z-index: 30;
  top: 0;
  display: grid;
  min-height: 66px;
  padding: 0.65rem clamp(1rem, 4vw, 3rem);
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid var(--course-line);
  background: var(--course-header);
  backdrop-filter: blur(18px);
}

.course-header-actions {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-self: end;
  gap: 0.75rem;
}

.course-back-link,
.course-context-link {
  display: inline-flex;
  width: max-content;
  min-height: 44px;
  padding: 0.55rem 0.7rem;
  align-items: center;
  gap: 0.5rem;
  color: var(--course-ink-soft);
  font-size: 0.9rem;
  font-weight: 760;
  text-decoration: none;
  border-radius: 9px;
}

.course-back-link:hover,
.course-context-link:hover {
  color: var(--course-blue-deep);
  background: var(--course-blue-soft);
}

.course-context-link {
  justify-self: end;
}

.course-theme-toggle {
  position: relative;
  display: grid;
  width: 52px;
  height: 30px;
  flex: 0 0 auto;
  padding: 3px;
  grid-template-columns: repeat(2, 1fr);
  place-items: center;
  color: var(--course-blue);
  border: 1px solid var(--course-line-strong);
  border-radius: 999px;
  background: var(--course-blue-soft);
  cursor: pointer;
}

.course-theme-toggle svg {
  position: relative;
  z-index: 1;
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.course-theme-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--course-surface);
  box-shadow: 0 2px 7px rgba(10, 25, 71, 0.22);
  transition: transform 180ms cubic-bezier(0.22, 1, 0.36, 1);
}

[data-theme="dark"] .course-theme-toggle {
  color: var(--course-surface);
  border-color: var(--course-blue);
  background: var(--course-blue);
}

[data-theme="dark"] .course-theme-moon {
  color: var(--course-blue);
}

[data-theme="dark"] .course-theme-thumb {
  transform: translateX(22px);
}

.course-runner-progress {
  width: min(34vw, 360px);
  min-width: 260px;
  justify-self: center;
}

.course-runner-progress[hidden] {
  display: none;
}

.course-runner-progress .lesson-item-progress {
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.course-runner-progress .lesson-item-progress span,
.course-runner-progress .lesson-item-progress strong {
  font-size: 0.72rem;
}

.course-runner-progress .lesson-item-progress strong {
  justify-self: end;
}

.course-runner-progress .lesson-item-progress progress {
  height: 4px;
  border-radius: 999px;
}

.course-brand {
  display: inline-flex;
  align-items: center;
  justify-self: center;
  color: var(--course-ink);
  font-size: 1.12rem;
  font-weight: 880;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.course-brand img {
  width: 0.9em;
  height: 1.18em;
  margin: 0 0.02em;
  object-fit: contain;
}

.course-main {
  min-height: calc(100vh - 130px);
}

.course-loading-shell {
  width: min(860px, calc(100% - 2rem));
  margin: 10vh auto;
  padding: clamp(1.5rem, 5vw, 3.5rem);
  border: 1px solid var(--course-line);
  border-radius: 24px;
  background: #fff;
  box-shadow: var(--course-shadow);
}

.course-loading-shell h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4rem);
  letter-spacing: -0.055em;
  line-height: 1;
}

.course-loading-shell > p:not(.course-kicker) {
  max-width: 680px;
  color: var(--course-ink-soft);
  font-size: 1.05rem;
  line-height: 1.65;
}

.course-loading-line {
  display: block;
  width: min(340px, 70%);
  height: 5px;
  margin-top: 2rem;
  overflow: hidden;
  border-radius: 2px;
  background: var(--course-line);
}

.course-loading-line::after {
  display: block;
  width: 38%;
  height: 100%;
  content: "";
  background: var(--course-blue);
  animation: course-loading 1.1s ease-in-out infinite alternate;
}

@keyframes course-loading {
  to { transform: translateX(165%); }
}

.course-overview {
  width: min(1200px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 4.5rem) 0 5rem;
}

.course-overview-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 2rem;
}

.course-overview-hero h1,
.course-projection-hero h1 {
  max-width: 820px;
  margin: 0;
  color: var(--course-ink);
  font-size: clamp(2.5rem, 6vw, 5.6rem);
  font-weight: 890;
  letter-spacing: -0.07em;
  line-height: 0.95;
}

.course-overview-hero p:not(.course-kicker),
.course-projection-hero p:not(.course-kicker) {
  max-width: 700px;
  margin: 1.2rem 0 0;
  color: var(--course-ink-soft);
  font-size: clamp(1rem, 1.8vw, 1.18rem);
  line-height: 1.65;
}

.course-overall-progress {
  min-width: 220px;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--course-line);
  border-radius: 16px;
  background: #fff;
}

.course-overall-progress strong,
.course-overall-progress span {
  display: block;
}

.course-overall-progress strong {
  margin-top: 0.25rem;
  font-size: 1.35rem;
}

.course-overall-progress span {
  color: var(--course-muted);
  font-size: 0.82rem;
}

.course-progress-track {
  display: block;
  width: 100%;
  height: 7px;
  margin-top: 0.8rem;
  overflow: hidden;
  appearance: none;
  border: 0;
  border-radius: 4px;
  background: var(--course-line);
}

.course-progress-track::-webkit-progress-bar,
.lesson-progress-track::-webkit-progress-bar {
  border-radius: inherit;
  background: var(--course-line);
}

.course-progress-track::-webkit-progress-value {
  border-radius: inherit;
  background: var(--course-green);
}

.course-progress-track::-moz-progress-bar {
  border-radius: inherit;
  background: var(--course-green);
}

.course-workspace {
  display: grid;
  margin-top: clamp(2.5rem, 6vw, 5rem);
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: start;
  gap: clamp(2rem, 5vw, 4rem);
}

.course-module + .course-module {
  margin-top: 2rem;
}

.course-module {
  overflow: hidden;
  border: 1px solid var(--course-line);
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(20, 38, 77, 0.06);
}

.course-module > summary {
  display: grid;
  padding: 1.25rem clamp(1rem, 3vw, 1.75rem);
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  list-style: none;
  cursor: pointer;
}

.course-module > summary::-webkit-details-marker { display: none; }

.course-module-number {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  color: #fff;
  font-weight: 880;
  border-radius: 13px;
  background: var(--course-blue);
  box-shadow: 0 5px 0 #172f8c;
}

.course-module-title {
  display: grid;
  gap: 0.2rem;
}

.course-module-title strong {
  font-size: clamp(1rem, 2.4vw, 1.35rem);
  letter-spacing: -0.025em;
}

.course-module-title span,
.course-module-status {
  color: var(--course-muted);
  font-size: 0.82rem;
}

.course-module-body {
  padding: 0 clamp(1rem, 4vw, 2rem) 2rem;
  border-top: 1px solid var(--course-line);
}

.course-module-intro {
  margin: 1.25rem 0;
  color: var(--course-ink-soft);
  line-height: 1.6;
}

.course-path {
  position: relative;
  display: grid;
  margin: 0;
  padding: 0.5rem 0;
  gap: 1.25rem;
  list-style: none;
}

.course-path::before {
  position: absolute;
  top: 36px;
  bottom: 36px;
  left: 27px;
  width: 3px;
  content: "";
  background: var(--course-line-strong);
  transform: none;
}

.course-path-node {
  position: relative;
  z-index: 1;
  display: flex;
  min-height: 112px;
  align-items: center;
}

.course-path-node:nth-child(even) {
  justify-content: flex-start;
}

.course-node-card {
  display: grid;
  width: 100%;
  min-height: 96px;
  padding: 1rem;
  grid-template-columns: 54px minmax(0, 1fr);
  align-items: center;
  gap: 0.85rem;
  color: var(--course-ink);
  text-decoration: none;
  border: 1px solid var(--course-line);
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 7px 18px rgba(20, 38, 77, 0.07);
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.course-node-card:hover {
  color: var(--course-blue-deep);
  border-color: var(--course-blue);
  transform: translateY(-1px);
}

.course-node-icon {
  display: grid;
  width: 54px;
  height: 48px;
  place-items: center;
  color: #fff;
  font-weight: 880;
  border: 1px solid var(--course-blue-deep);
  border-radius: 13px;
  background: var(--course-blue);
  box-shadow: 0 6px 0 var(--course-blue-deep);
}

.course-node-copy {
  display: grid;
  gap: 0.25rem;
}

.course-node-copy strong {
  font-size: 0.98rem;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.course-node-copy small {
  color: var(--course-blue-deep);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.course-node-copy span {
  color: var(--course-muted);
  font-size: 0.78rem;
}

.course-path-node.is-complete .course-node-icon {
  border-color: #0f6d43;
  background-color: var(--course-green);
  box-shadow: 0 6px 0 #0f6d43;
}

.course-path-node.is-current .course-node-card {
  border-width: 2px;
  border-color: var(--course-blue);
  background: var(--course-blue-soft);
}

.course-path-node.is-current .course-node-icon {
  animation: course-current-pulse 2.2s ease-in-out infinite;
}

.course-path-node.is-review .course-node-icon {
  color: #5a3300;
  border-color: #d18200;
  background-color: #ffc65b;
  box-shadow: 0 6px 0 #d18200;
}

.course-path-node.is-planned {
  opacity: 0.72;
}

.course-path-node.is-planned .course-node-card {
  cursor: default;
  box-shadow: none;
}

.course-chapter {
  margin: 1.25rem 0 1.75rem;
  padding: 1rem;
  border: 1px solid var(--course-line);
  border-radius: 18px;
  background: var(--course-canvas);
}

.course-chapter-header {
  margin-bottom: 0.5rem;
  padding: 0.25rem 0.35rem 0.85rem;
  border-bottom: 1px solid var(--course-line);
}

.course-chapter-header span {
  color: var(--course-blue-deep);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.course-chapter-header h3 {
  margin: 0.3rem 0 0;
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  letter-spacing: -0.025em;
}

.course-path-capstone {
  margin-top: 0.75rem;
}

.course-path-capstone::before {
  background: linear-gradient(var(--course-amber), var(--course-blue));
}

.course-capstone-status {
  display: grid;
  margin: 1.25rem 0 0.5rem;
  padding: 1rem;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.85rem;
  border: 1px dashed var(--course-line-strong);
  border-radius: 16px;
  background: var(--course-surface);
}

.course-capstone-icon {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--course-amber);
  border: 1px solid var(--course-line-strong);
  border-radius: 50%;
}

.course-capstone-status > span:nth-child(2) {
  display: grid;
  gap: 0.2rem;
}

.course-capstone-status small {
  color: var(--course-blue-deep);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.course-capstone-status > span > span {
  color: var(--course-muted);
  font-size: 0.78rem;
  line-height: 1.45;
}

.course-capstone-status a,
.course-readiness-links a {
  color: var(--course-blue-deep);
  font-weight: 780;
}

.course-capstone-status.is-available,
.lesson-video-inline.is-available {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: stretch;
}

.course-video-companion-heading {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.85rem;
}

.course-video-companion-heading > span:last-child {
  display: grid;
  gap: 0.2rem;
}

.course-video-player-block {
  display: grid;
  min-width: 0;
  gap: 0.55rem;
}

.learn-video-first .course-video-load-button {
  grid-template-columns: minmax(0, 1fr);
  padding: 0;
  gap: 0;
}

.learn-video-first .learn-visual-card__header {
  grid-template-columns: minmax(0, 1fr);
}

.learn-video-first .course-video-load-button > span:last-child {
  padding: 0.8rem 1rem;
}

.learn-video-first .course-video-poster {
  border-radius: 0;
}

.learn-video-unavailable {
  display: grid;
  gap: 0.7rem;
  min-height: 180px;
  padding: 1.5rem;
  place-content: center;
  text-align: center;
  border: 1px solid var(--course-line-strong);
  border-radius: 14px;
  background: var(--course-blue-soft);
}

.learn-video-unavailable > span { font-size: 2.5rem; }

.learn-video-introduction,
.learn-script-introduction {
  margin: 0;
  color: var(--course-ink);
  line-height: 1.65;
}

.learn-script-points {
  display: grid;
  gap: 0.75rem;
  margin: 0;
}

.learn-script-points > div {
  padding: 0.9rem 1rem;
  border: 1px solid var(--course-line-strong);
  border-radius: 12px;
  background: var(--course-surface);
}

.learn-script-points dt { color: var(--course-ink); font-weight: 800; }
.learn-script-points dd { margin: 0.35rem 0 0; color: var(--course-ink); line-height: 1.6; }
.learn-script-sources summary { min-height: 44px; align-content: center; cursor: pointer; font-weight: 750; }
.learn-script-sources li { margin-block: 0.5rem; }
.learn-script-sources small { display: block; color: var(--course-muted); line-height: 1.5; }
.learn-script-sources a { color: var(--course-blue-deep); overflow-wrap: anywhere; }

.learn-chapter-section {
  display: grid;
  gap: 0.8rem;
  min-width: 0;
  padding-top: 1.2rem;
  border-top: 1px solid var(--course-line);
}

.learn-chapter-section h2 { margin: 0; font-size: 1.1rem; line-height: 1.4; }
.learn-script-chapter .learn-script-points > div { padding: 0; border: 0; background: transparent; }
.learn-script-chapter .learn-script-points { gap: 1rem; }
.learn-script-chapter .learn-script-sources { font-size: 0.9rem; }

.course-video-player {
  display: grid;
  width: 100%;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--course-line-strong);
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-blue) 7%, var(--course-surface));
}

.course-video-load-button {
  display: grid;
  width: 100%;
  min-height: 76px;
  padding: 0.85rem 1rem;
  grid-template-columns: clamp(112px, 30%, 180px) minmax(0, 1fr);
  align-items: center;
  gap: 0.85rem;
  color: var(--course-ink);
  text-align: left;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.course-video-load-button:hover {
  background: color-mix(in srgb, var(--course-blue) 10%, transparent);
}

.course-video-load-button:focus-visible {
  outline: 3px solid var(--course-blue);
  outline-offset: -3px;
}

.course-video-load-button > span:last-child {
  display: grid;
  min-width: 0;
  gap: 0.15rem;
}

.course-video-load-button strong,
.course-video-load-button small {
  display: block;
  overflow-wrap: anywhere;
}

.course-video-load-button small {
  color: var(--course-muted);
  font-weight: 650;
  line-height: 1.35;
}

.course-video-load-icon {
  position: absolute;
  z-index: 1;
  display: grid;
  width: 46px;
  height: 40px;
  place-items: center;
  color: #fff;
  border-radius: 12px;
  background: var(--course-blue);
  box-shadow: 0 4px 0 color-mix(in srgb, var(--course-blue-deep) 88%, #000);
}

.course-video-poster {
  position: relative;
  display: grid;
  width: 100%;
  aspect-ratio: 16 / 9;
  place-items: center;
  overflow: hidden;
  border-radius: 10px;
  background: var(--course-blue-soft);
}

.course-video-poster img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.course-video-privacy {
  margin: 0;
  color: var(--course-muted);
  font-size: 0.74rem;
  line-height: 1.45;
}

.course-video-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.9rem;
}

.course-video-links a,
.lesson-video-inline .course-video-links a {
  min-height: 44px;
  padding: 0.55rem 0.75rem;
  align-content: center;
  color: var(--course-blue-deep);
  font-weight: 800;
  border: 1px solid var(--course-line-strong);
  border-radius: 10px;
  text-decoration: none;
}

.course-video-iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
}

.course-side-rail {
  position: sticky;
  top: 90px;
  display: grid;
  gap: 0.85rem;
}

.course-side-card {
  padding: 1.15rem;
  border: 1px solid var(--course-line);
  border-radius: 16px;
  background: #fff;
}

.course-side-card h2,
.course-side-card h3 {
  margin: 0;
  font-size: 1rem;
  letter-spacing: -0.02em;
}

.course-side-card p {
  margin: 0.55rem 0 0;
  color: var(--course-muted);
  font-size: 0.88rem;
  line-height: 1.5;
}

.course-consistency-stats {
  display: grid;
  margin-top: 0.8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
}

.course-consistency-stats span {
  display: grid;
  padding: 0.7rem;
  gap: 0.18rem;
  color: var(--course-muted);
  font-size: 0.72rem;
  border: 1px solid var(--course-line);
  border-radius: 12px;
  background: var(--course-canvas);
}

.course-consistency-stats strong {
  color: var(--course-ink);
  font-size: 1.05rem;
}

.course-side-card a {
  display: inline-flex;
  min-height: 44px;
  margin-top: 0.75rem;
  align-items: center;
  color: var(--course-blue-deep);
  font-weight: 780;
  text-decoration: none;
}

.course-readiness-links {
  display: flex;
  margin-top: 0.65rem;
  flex-wrap: wrap;
  gap: 0.45rem 0.9rem;
}

.course-readiness-links a {
  min-height: 44px;
  margin: 0;
  align-items: center;
}

.course-availability-note {
  margin-top: 1rem;
  padding: 0.9rem 1rem;
  color: var(--course-ink-soft);
  font-size: 0.88rem;
  line-height: 1.5;
  border-left: 4px solid var(--course-amber);
  background: var(--course-amber-soft);
}

.course-projection {
  width: min(1060px, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 4.5rem) 0 5rem;
}

.course-projection-tabs {
  display: flex;
  margin: 2rem 0;
  padding-bottom: 0.4rem;
  gap: 0.45rem;
  overflow-x: auto;
}

.course-projection-tabs a {
  display: inline-flex;
  min-height: 44px;
  padding: 0.65rem 0.85rem;
  align-items: center;
  color: var(--course-ink-soft);
  font-weight: 760;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.course-projection-tabs a[aria-current="page"] {
  color: var(--course-blue-deep);
  border-color: var(--course-blue);
}

.course-reference-modules,
.course-pacing-weeks {
  display: grid;
  gap: 1rem;
}

.course-reference-module,
.course-pacing-week {
  padding: clamp(1rem, 3vw, 1.6rem);
  border: 1px solid var(--course-line);
  border-radius: 18px;
  background: #fff;
}

.course-reference-module h2,
.course-pacing-week h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2.7vw, 1.7rem);
  letter-spacing: -0.035em;
}

.course-reference-list,
.course-pacing-list {
  display: grid;
  margin: 1rem 0 0;
  padding: 0;
  gap: 0.5rem;
  list-style: none;
}

.course-reference-list li,
.course-pacing-list li {
  display: grid;
  padding: 0.75rem 0;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  border-top: 1px solid var(--course-line);
}

.course-reference-list a,
.course-pacing-list a {
  color: var(--course-ink);
  font-weight: 720;
  text-decoration: none;
}

.course-reference-list small,
.course-pacing-list small {
  color: var(--course-muted);
}

.lesson-shell {
  min-height: calc(100vh - 66px);
  padding-bottom: 98px;
  background: #fff;
}

.lesson-progress {
  position: sticky;
  z-index: 20;
  top: 66px;
  border-bottom: 1px solid var(--course-line);
  background: #fff;
}

.lesson-progress-track {
  display: block;
  width: 100%;
  height: 5px;
  appearance: none;
  border: 0;
  background: var(--course-line);
}

.lesson-progress-track::-webkit-progress-value {
  background: var(--course-blue);
  transition: width 220ms ease;
}

.lesson-progress-track::-moz-progress-bar {
  background: var(--course-blue);
  transition: width 220ms ease;
}

.lesson-stage-nav {
  display: grid;
  width: min(780px, calc(100% - 2rem));
  min-height: 48px;
  margin: 0 auto;
  padding: 0.45rem 0;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.35rem;
}

.lesson-stage-nav span {
  display: grid;
  place-items: center;
  color: var(--course-muted);
  font-size: 0.73rem;
  font-weight: 780;
}

.lesson-stage-nav .is-current {
  color: var(--course-blue-deep);
}

.lesson-stage-nav .is-complete {
  color: var(--course-green);
}

.lesson-stage-nav .checkpoint-stage-label {
  grid-column: 1 / -1;
}

.lesson-card {
  width: min(760px, calc(100% - 2rem));
  margin: clamp(2rem, 7vh, 5rem) auto;
  animation: course-stage-enter 240ms ease-out both;
}

.lesson-card-header {
  margin-bottom: 1.5rem;
  text-align: center;
}

.lesson-card-header h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4.25rem);
  font-weight: 890;
  letter-spacing: -0.065em;
  line-height: 1;
}

.lesson-card-header p:not(.course-kicker) {
  max-width: 620px;
  margin: 1rem auto 0;
  color: var(--course-ink-soft);
  font-size: 1.05rem;
  line-height: 1.65;
}

.lesson-task {
  padding: clamp(1.25rem, 4vw, 2.25rem);
  border: 1px solid var(--course-line);
  border-radius: 22px;
  background: #fff;
  box-shadow: var(--course-shadow);
}

.lesson-task h2 {
  margin: 0;
  font-size: clamp(1.25rem, 3vw, 1.8rem);
  letter-spacing: -0.035em;
}

.lesson-task p,
.lesson-task li {
  color: var(--course-ink-soft);
  line-height: 1.65;
}

.lesson-concept-grid {
  display: grid;
  margin-top: 1.25rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
}

.lesson-concept {
  padding: 1rem;
  border: 1px solid var(--course-line);
  border-radius: 14px;
  background: var(--course-canvas);
}

.lesson-concept strong {
  display: block;
  color: var(--course-ink);
}

.lesson-concept p {
  margin: 0.45rem 0 0;
  font-size: 0.9rem;
}

.lesson-item-progress {
  display: grid;
  margin: 0.9rem 0 1rem;
  padding: 0.75rem 0.85rem;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.45rem 0.8rem;
  border: 1px solid var(--course-line);
  border-radius: 12px;
  background: var(--course-canvas);
}

.lesson-item-progress span,
.lesson-item-progress strong {
  color: var(--course-ink);
  font-size: 0.82rem;
  font-weight: 800;
}

.lesson-item-progress strong {
  color: var(--course-muted);
}

.lesson-item-progress progress {
  width: 100%;
  height: 7px;
  grid-column: 1 / -1;
  accent-color: var(--course-blue);
}

.lesson-video-inline {
  display: grid;
  width: min(760px, calc(100% - 2rem));
  margin: -2.5rem auto 1.5rem;
  padding: 1rem 1.1rem;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.9rem;
  border: 1px dashed var(--course-line-strong);
  border-radius: 16px;
  background: var(--course-canvas);
}

.lesson-video-inline.is-available {
  grid-template-columns: minmax(0, 1fr);
}

.lesson-video-inline a {
  min-height: 44px;
  padding: 0.65rem 0.8rem;
  align-content: center;
  color: var(--course-blue-deep);
  font-weight: 800;
  border: 1px solid var(--course-line-strong);
  border-radius: 10px;
  text-decoration: none;
}

.lesson-video-inline > span:nth-child(2) {
  display: grid;
  gap: 0.25rem;
}

.lesson-video-inline strong,
.lesson-video-inline small {
  display: block;
}

.lesson-video-inline small {
  color: var(--course-muted);
  line-height: 1.45;
}

.lesson-video-placeholder {
  display: grid;
  min-height: 260px;
  padding: 2rem;
  place-items: center;
  text-align: center;
  border: 1px dashed var(--course-line-strong);
  border-radius: 18px;
  background: var(--course-canvas);
}

.lesson-video-placeholder strong {
  display: block;
  margin-top: 0.8rem;
  color: var(--course-ink);
}

.lesson-video-placeholder span {
  max-width: 520px;
  color: var(--course-muted);
  line-height: 1.55;
}

.lesson-video-icon {
  display: grid;
  width: 60px;
  height: 52px;
  place-items: center;
  color: #fff;
  font-weight: 900;
  border-radius: 15px;
  background: var(--course-blue);
  box-shadow: 0 6px 0 #172f8c;
}

.lesson-retrieval-label {
  display: grid;
  margin-top: 1rem;
  gap: 0.5rem;
  color: var(--course-ink);
  font-weight: 760;
}

.lesson-retrieval-label textarea {
  width: 100%;
  min-height: 150px;
  padding: 1rem;
  resize: vertical;
  color: var(--course-ink);
  font: inherit;
  font-weight: 450;
  line-height: 1.55;
  border: 1px solid var(--course-line-strong);
  border-radius: 12px;
  background: #fff;
}

.lesson-option-list {
  display: grid;
  margin: 1.25rem 0 0;
  padding: 0;
  gap: 0.65rem;
  border: 0;
}

.lesson-option {
  display: grid;
  min-height: 58px;
  padding: 0.85rem 1rem;
  grid-template-columns: 32px minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem;
  color: var(--course-ink);
  border: 1px solid var(--course-line-strong);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
}

.lesson-option:hover {
  border-color: var(--course-blue);
  background: var(--course-blue-soft);
}

.lesson-option:has(input:checked) {
  border-width: 2px;
  border-color: var(--course-blue);
  background: var(--course-blue-soft);
}

.lesson-option.is-correct,
.lesson-option.is-correct:has(input:checked) {
  border-color: #53a97a;
  background: var(--course-green-soft);
}

.lesson-option.is-incorrect,
.lesson-option.is-incorrect:has(input:checked) {
  border-color: #d58b25;
  background: var(--course-amber-soft);
}

.lesson-option input {
  width: 20px;
  height: 20px;
  accent-color: var(--course-blue);
}

.lesson-option span strong,
.lesson-option span small {
  display: block;
}

.lesson-option span small {
  margin-top: 0.2rem;
  color: var(--course-muted);
  font-size: 0.78rem;
  line-height: 1.35;
}

.lesson-retrieval-label > span {
  color: var(--course-muted);
  font-weight: 650;
}

.lesson-feedback {
  margin-top: 1rem;
  padding: 1rem;
  color: var(--course-ink);
  border: 1px solid var(--course-line);
  border-radius: 14px;
  animation: course-feedback-enter 180ms ease-out both;
}

.lesson-feedback.is-correct {
  border-color: #88caaa;
  background: var(--course-green-soft);
}

.lesson-feedback.is-incorrect {
  border-color: #e0a04a;
  background: var(--course-amber-soft);
}

.lesson-feedback strong { display: block; }
.lesson-feedback p { margin: 0.45rem 0 0; }

.lesson-model-answer,
.lesson-recall-rating,
.lesson-review-panel {
  margin-top: 1rem;
}

.lesson-model-answer {
  display: grid;
  justify-items: start;
  gap: 0.8rem;
}

.lesson-model-answer [data-recall-answer] {
  width: 100%;
  padding: 1rem;
  border-left: 4px solid var(--course-blue);
  border-radius: 10px;
  background: var(--course-blue-soft);
}

.lesson-model-answer [data-recall-answer] p {
  margin: 0.45rem 0 0;
}

.lesson-recall-rating {
  padding: 0;
  border: 0;
}

.lesson-recall-rating legend {
  margin-bottom: 0.65rem;
  color: var(--course-ink);
  font-weight: 800;
}

.lesson-choice-actions,
.course-completion-actions,
.course-checkpoint-actions {
  display: flex;
  align-items: stretch;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.lesson-choice-actions .course-secondary-action.is-selected {
  color: #fff;
  border-color: var(--course-blue);
  background: var(--course-blue);
}

.lesson-review-panel {
  padding-top: 0.8rem;
  border-top: 1px solid var(--course-line);
}

.lesson-review-panel summary {
  min-height: 44px;
  align-content: center;
  color: var(--course-blue-deep);
  font-weight: 820;
  cursor: pointer;
}

.lesson-action-bar {
  position: fixed;
  z-index: 40;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  min-height: 78px;
  padding: 0.8rem max(1rem, env(safe-area-inset-right)) max(0.8rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  border-top: 0;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: none;
}

.lesson-action-layout {
  display: grid;
  width: min(760px, 100%);
  align-items: center;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 1.25fr);
  gap: 0.65rem 1rem;
}

.lesson-action-note {
  margin: 0;
  color: var(--course-muted);
  font-size: 0.85rem;
  line-height: 1.4;
}

.lesson-action-controls {
  display: flex;
  align-items: stretch;
  justify-content: flex-end;
  gap: 0.75rem;
}

.lesson-action-controls .lesson-previous-action {
  flex: 1 1 34%;
}

.lesson-action-controls .lesson-primary-action {
  flex: 2 1 66%;
}

.lesson-action-controls > * {
  min-width: 0;
}

@media (min-width: 701px) {
  .course-view-lesson .lesson-action-layout:not(.has-note) {
    grid-template-columns: minmax(320px, 360px);
    justify-content: center;
  }

  .course-view-lesson .lesson-action-layout:not(.has-note) .lesson-action-controls {
    grid-column: 1;
    justify-content: center;
  }
}

.lesson-primary-action[disabled] {
  color: #8a93a4;
  border-color: var(--course-line);
  background: #e9edf3;
  cursor: not-allowed;
  transform: none;
}

.course-secondary-action {
  color: var(--course-ink);
  border-color: var(--course-line-strong);
  background: #fff;
}

.course-secondary-action:hover {
  color: var(--course-blue-deep);
  border-color: var(--course-blue);
  background: var(--course-blue-soft);
}

.course-completion {
  text-align: center;
}

.course-completion-actions {
  margin-top: 1.25rem;
}

.course-completion-mark {
  display: grid;
  width: 82px;
  height: 70px;
  margin: 0 auto 1.5rem;
  place-items: center;
  color: #fff;
  font-size: 2rem;
  font-weight: 900;
  border-radius: 20px;
  background: var(--course-green);
  box-shadow: 0 8px 0 #0f6d43;
}

.course-checkpoint-summary {
  display: grid;
  margin: 1.25rem 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.course-checkpoint-summary div {
  padding: 1rem;
  text-align: center;
  border: 1px solid var(--course-line);
  border-radius: 14px;
  background: var(--course-canvas);
}

.course-checkpoint-summary strong,
.course-checkpoint-summary span { display: block; }
.course-checkpoint-summary strong { font-size: 1.5rem; }
.course-checkpoint-summary span { margin-top: 0.25rem; color: var(--course-muted); font-size: 0.78rem; }

.course-final-readiness {
  margin: 1.25rem 0;
  padding: 1.1rem;
  text-align: left;
  border: 1px solid var(--course-line);
  border-radius: 16px;
  background: var(--course-canvas);
}

.course-final-readiness h2 {
  margin: 0.35rem 0 0;
  font-size: 1.2rem;
}

.course-final-readiness > p:not(.course-kicker) {
  color: var(--course-muted);
  line-height: 1.55;
}

.course-app-footer {
  display: flex;
  min-height: 64px;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--course-muted);
  font-size: 0.78rem;
  border-top: 1px solid var(--course-line);
  background: #fff;
}

.course-app-footer a {
  color: var(--course-ink-soft);
}

.course-view-lesson .course-app-footer,
.course-view-orientation .course-app-footer,
.course-view-checkpoint .course-app-footer {
  display: none;
}

.course-view-lesson .course-brand,
.course-view-orientation .course-brand,
.course-view-checkpoint .course-brand,
.course-view-lesson .course-context-link,
.course-view-orientation .course-context-link,
.course-view-checkpoint .course-context-link {
  display: none;
}

.course-view-orientation .course-app-header,
.course-view-checkpoint .course-app-header {
  grid-template-columns: minmax(150px, 1fr) auto;
  background: var(--course-header);
}

.course-view-lesson .course-app-header {
  grid-template-columns: minmax(150px, 1fr) minmax(260px, 360px) minmax(150px, 1fr);
  background: var(--course-header);
}

.course-view-lesson .course-runner-progress {
  grid-column: 2;
}

.course-view-lesson .course-header-actions {
  grid-column: 3;
}

@keyframes course-stage-enter {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes course-feedback-enter {
  from { opacity: 0; transform: scale(0.985); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes course-current-pulse {
  0%, 100% { box-shadow: 0 6px 0 #172f8c, 0 0 0 0 rgba(62, 108, 255, 0.25); }
  50% { box-shadow: 0 6px 0 #172f8c, 0 0 0 10px rgba(62, 108, 255, 0); }
}

html[data-course-entry="true"] .brand,
html[data-course-entry="true"] .exam-header-title,
html[data-course-entry="true"] .topbar a,
html[data-course-entry="true"] .topbar button {
  color: var(--course-ink);
}

html[data-course-entry="true"],
html[data-course-entry="true"] body {
  overscroll-behavior-y: none;
}

.course-entry-tool-grid a,
.course-loading-shell,
.course-overall-progress,
.course-module,
.course-node-card,
.course-side-card,
.course-reference-module,
.course-pacing-week,
.lesson-shell,
.lesson-progress,
.lesson-task,
.lesson-retrieval-label textarea,
.lesson-option,
.course-secondary-action,
.course-app-footer {
  background: var(--course-surface);
}

.course-module,
.course-node-card,
.course-side-card,
.course-overall-progress,
.lesson-task,
.course-reference-module,
.course-pacing-week {
  box-shadow: var(--course-card-shadow);
}

.lesson-action-bar {
  background: var(--course-action-bar);
  backdrop-filter: blur(16px);
}

.lesson-primary-action[disabled] {
  color: var(--course-disabled-ink);
  border-color: var(--course-line);
  background: var(--course-disabled);
}

.course-path-node.is-current .course-node-card {
  box-shadow: 0 0 0 1px var(--course-blue), 0 16px 44px rgba(62, 108, 255, 0.2);
}

.course-path-node.is-complete .course-node-card {
  border-color: rgba(55, 207, 145, 0.55);
}

.lesson-feedback.is-correct {
  box-shadow: 0 0 28px rgba(55, 207, 145, 0.12);
}

.lesson-feedback.is-incorrect {
  box-shadow: 0 0 28px rgba(255, 200, 87, 0.1);
}

@media (max-width: 1040px) {
  .course-entry-tool-grid {
    width: min(620px, 100%);
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .course-exam-entry-hero,
  .course-entry-fept-formula,
  .course-workspace {
    grid-template-columns: 1fr;
  }

  .course-entry-fept-formula {
    grid-template-areas:
      "copy"
      "diagram"
      "return";
  }

  .course-entry-fept-copy {
    justify-items: center;
    text-align: center;
  }

  .course-entry-fept-copy > p:not(.course-entry-fept-tagline) { max-width: 34rem; }

  .course-overview-hero {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .course-overall-progress {
    width: 100%;
  }

  .course-side-rail {
    position: static;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .course-path::before {
    left: 28px;
    transform: none;
  }

  .course-path-node,
  .course-path-node:nth-child(even) {
    justify-content: flex-start;
  }

  .course-node-card {
    width: calc(100% - 48px);
    margin-left: 48px;
  }
}

@media (max-width: 640px) {
  html[data-course-entry="true"] .topbar {
    min-height: 60px;
    padding-inline: 1rem;
  }

  html[data-course-entry="true"] .exam-header-title {
    display: none;
  }

  .course-exam-entry {
    width: min(100% - 1rem, 1160px);
    margin-top: 0.75rem;
  }

  .course-exam-entry-hero {
    padding: 0;
  }

  .course-entry-summary-card {
    width: calc(100% - 18px);
    min-height: 0;
    padding: 6px 1.1rem 1.25rem;
    border-radius: 20px;
  }

  .course-entry-summary-card::before {
    inset: 7px 0 -7px 7px;
  }

  .course-entry-summary-card::after {
    inset: 14px 0 -14px 14px;
  }

  .course-entry-summary-art {
    width: min(270px, 76vw);
    height: 185px;
    margin-bottom: -18px;
  }

  .course-entry-summary-card h1 {
    font-size: clamp(1.8rem, 8vw, 2.25rem);
  }

  .course-entry-summary-copy {
    max-width: 29rem;
    margin-bottom: 0.85rem;
    font-size: 0.9rem;
  }

  .course-entry-tool-grid {
    margin-top: 1.75rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
  }

  .course-entry-tool-grid a {
    min-height: 126px;
    padding: 0.55rem 0.35rem 0.75rem;
    font-size: 0.82rem;
    border-radius: 15px;
  }

  .course-entry-tool-art {
    width: 66px;
    height: 66px;
  }

  .course-entry-fept-formula {
    margin-top: 1.6rem;
    padding: 1.35rem 1rem;
    gap: 1.5rem;
    border-radius: 20px;
  }

  .course-entry-fept-copy h2 { font-size: clamp(2rem, 10vw, 2.7rem); }

  .course-entry-fept-tagline {
    justify-content: center;
    font-size: 1rem;
  }

  .course-entry-fept-diagram {
    width: 100%;
    grid-template-columns: minmax(0, 1fr);
    gap: 1.35rem;
  }

  .course-entry-fept-diagram li {
    min-height: 88px;
    padding-inline: 0.25rem;
    grid-template-columns: 82px minmax(0, 1fr);
    justify-items: start;
    align-items: center;
    gap: 1rem;
    text-align: left;
  }

  .course-entry-fept-node {
    width: 78px;
    grid-row: 1;
  }

  .course-entry-fept-letter { font-size: 3.4rem; }

  .course-entry-fept-icon {
    right: -4px;
    bottom: -4px;
    width: 32px;
    height: 32px;
    border-width: 3px;
  }

  .course-entry-fept-icon-svg {
    width: 17px;
    height: 17px;
  }

  .course-entry-fept-stage-copy {
    grid-column: 2;
    justify-items: start;
  }

  .course-entry-fept-stage-copy p { max-width: none; }

  .course-entry-fept-connector {
    top: auto;
    right: auto;
    bottom: -1.28rem;
    left: 25px;
    width: 30px;
    transform: rotate(90deg);
  }

  .course-entry-fept-return svg { display: none; }

  .course-entry-fept-return {
    padding-top: 1rem;
    border-top: 1px solid #2a3a58;
  }

  .course-side-rail,
  .lesson-concept-grid {
    grid-template-columns: 1fr;
  }

  .course-app-header {
    min-height: 58px;
    padding: 0.45rem 0.65rem;
    grid-template-columns: 1fr auto;
  }

  .course-view-lesson .course-app-header,
  .course-view-orientation .course-app-header,
  .course-view-checkpoint .course-app-header {
    min-height: 88px;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    gap: 0.25rem 0.5rem;
  }

  .course-brand {
    display: none;
  }

  .course-context-link {
    font-size: 0.8rem;
  }

  .course-back-link {
    font-size: 0.82rem;
  }

  .course-header-actions {
    gap: 0.45rem;
  }

  .course-view-lesson .course-header-actions,
  .course-view-orientation .course-header-actions,
  .course-view-checkpoint .course-header-actions {
    display: contents;
  }

  .course-runner-progress {
    width: 100%;
    min-width: 0;
  }

  .course-view-lesson .course-runner-progress,
  .course-view-orientation .course-runner-progress,
  .course-view-checkpoint .course-runner-progress {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .course-view-lesson .course-theme-toggle,
  .course-view-orientation .course-theme-toggle,
  .course-view-checkpoint .course-theme-toggle {
    grid-column: 2;
    grid-row: 1;
  }

  .course-runner-progress .lesson-item-progress span,
  .course-runner-progress .lesson-item-progress strong {
    font-size: 0.68rem;
  }

  .course-theme-toggle {
    width: 46px;
  }

  [data-theme="dark"] .course-theme-thumb {
    transform: translateX(16px);
  }

  .course-overview,
  .course-projection {
    width: min(100% - 1rem, 1200px);
    padding-top: 1.7rem;
  }

  .course-overview-hero h1,
  .course-projection-hero h1 {
    font-size: clamp(2.55rem, 14vw, 4.4rem);
  }

  .course-module > summary {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 0.75rem;
  }

  .course-module-number {
    width: 42px;
    height: 42px;
  }

  .course-module-status {
    grid-column: 2;
  }

  .course-module-body {
    padding-inline: 0.75rem;
  }

  .course-chapter {
    padding: 0.55rem;
  }

  .course-capstone-status,
  .lesson-video-inline.is-available {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .course-capstone-status a,
  .lesson-video-inline.is-available a {
    grid-column: 2;
  }

  .course-node-card {
    width: calc(100% - 38px);
    margin-left: 38px;
    padding: 0.8rem;
    grid-template-columns: 46px minmax(0, 1fr);
  }

  .course-path::before { left: 20px; }

  .course-node-icon {
    width: 46px;
    height: 42px;
  }

  .course-reference-list li,
  .course-pacing-list li {
    grid-template-columns: 30px minmax(0, 1fr);
  }

  .course-reference-list small,
  .course-pacing-list small {
    grid-column: 2;
  }

  .lesson-progress { top: 90px; }
  .lesson-stage-nav { width: min(100% - 0.75rem, 780px); }
  .lesson-stage-nav span { font-size: 0.66rem; }
  .lesson-card { width: min(100% - 1rem, 760px); margin-top: 1.5rem; }
  .lesson-card-header h1 { overflow-wrap: anywhere; text-wrap: pretty; }
  .lesson-task { padding: 1rem; border-radius: 17px; }
  .lesson-item-progress { grid-template-columns: 1fr; }
  .lesson-item-progress strong { justify-self: start; }
  .course-runner-progress .lesson-item-progress { grid-template-columns: minmax(0, 1fr) auto; }
  .course-runner-progress .lesson-item-progress strong { justify-self: end; }
  .lesson-video-placeholder { min-height: 220px; padding: 1.25rem; }
  .lesson-action-layout { grid-template-columns: 1fr; }
  .lesson-action-controls { width: 100%; }
  .lesson-action-note { text-align: center; }
  .lesson-action-controls .lesson-primary-action,
  .lesson-action-controls .course-secondary-action { width: auto; }
  .lesson-choice-actions,
  .course-completion-actions,
  .course-checkpoint-actions { flex-direction: column; }
  .lesson-choice-actions .course-secondary-action,
  .course-completion-actions .course-secondary-action,
  .course-checkpoint-actions .course-secondary-action,
  .course-checkpoint-actions .course-primary-action { width: 100%; }
  .lesson-shell { padding-bottom: 162px; }
  .course-checkpoint-summary { grid-template-columns: 1fr; }
  .course-app-footer { align-items: flex-start; flex-direction: column; }
}

/* Layered course hierarchy: overview tools and a distraction-free lesson exit. */
.course-overview-study-tools {
  width: min(1200px, 100%);
  margin: clamp(3rem, 7vw, 6rem) auto 0;
  padding-top: clamp(2rem, 4vw, 3.5rem);
  border-top: 1px solid var(--course-line);
}

.course-overview-study-tools .course-entry-fept-formula,
.course-overview-study-tools .course-entry-tool-grid {
  width: min(1060px, 100%);
}

.course-overview-study-tools .course-entry-fept-formula {
  margin: clamp(1.25rem, 2vw, 1.75rem) auto 0;
}

.course-lesson-exit {
  display: grid;
  width: 44px;
  height: 44px;
  padding: 0;
  grid-column: 1;
  place-items: center;
  color: var(--course-ink);
  border: 1px solid var(--course-line-strong);
  border-radius: 12px;
  background: var(--course-surface);
  cursor: pointer;
  box-shadow: 0 8px 22px rgba(20, 38, 77, 0.08);
}

.course-lesson-exit svg,
.course-lesson-exit-dialog-close svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

.course-lesson-exit:hover,
.course-lesson-exit-dialog-close:hover {
  color: var(--course-blue-deep);
  border-color: var(--course-blue);
  background: var(--course-blue-soft);
}

.course-view-lesson .course-runner-subbar {
  top: 0;
  grid-template-columns: minmax(44px, 1fr) minmax(300px, 720px) minmax(44px, 1fr);
}

.course-view-lesson .course-runner-subbar .course-runner-progress {
  grid-column: 2;
}

.course-lesson-exit-dialog {
  width: min(520px, calc(100% - 2rem));
  padding: clamp(1.35rem, 4vw, 2rem);
  color: var(--course-ink);
  border: 1px solid var(--course-line-strong);
  border-radius: 22px;
  background: var(--course-surface);
  box-shadow: 0 28px 90px rgba(3, 10, 27, 0.42);
}

.course-lesson-exit-dialog::backdrop {
  background: rgba(4, 10, 24, 0.66);
  backdrop-filter: blur(5px);
}

.course-lesson-exit-dialog-close {
  position: absolute;
  top: 12px;
  right: 12px;
  display: grid;
  width: 40px;
  height: 40px;
  padding: 0;
  place-items: center;
  color: var(--course-muted);
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}

.course-lesson-exit-dialog h2 {
  max-width: 420px;
  margin: 0;
  padding-right: 2rem;
  font-size: clamp(1.55rem, 4vw, 2.15rem);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.course-lesson-exit-dialog > p:not(.course-kicker) {
  margin: 0.8rem 0 0;
  color: var(--course-ink-soft);
  line-height: 1.5;
}

.course-lesson-exit-actions {
  display: grid;
  margin-top: 1.4rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.course-lesson-exit-actions > * {
  width: 100%;
}

@media (max-width: 700px) {
  .course-view-lesson .course-runner-subbar {
    top: 0;
    min-height: 84px;
    padding: 7px 10px;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 8px;
  }

  .course-view-lesson .course-runner-subbar .course-runner-progress:not([hidden]) {
    grid-column: 2;
  }

  .course-view-lesson .lesson-shell,
  .course-view-lesson .lesson-shell--visual {
    min-height: calc(100vh - 84px);
  }

  .course-overview-study-tools {
    margin-top: 3rem;
  }

  .course-lesson-exit-actions {
    grid-template-columns: 1fr;
  }
}

@media (forced-colors: active) {
  .course-lesson-exit {
    color: ButtonText;
    border: 2px solid ButtonText;
    background: ButtonFace;
    box-shadow: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .course-loading-line::after { animation: none; }
  .lesson-progress-track::-webkit-progress-value,
  .lesson-progress-track::-moz-progress-bar,
  .course-primary-action,
  .lesson-primary-action,
  .course-node-card { transition: none; }
  .course-primary-action::after,
  .lesson-primary-action::after { display: none; }
  .course-path-node.is-current .course-node-icon,
  .lesson-card,
  .lesson-feedback { animation: none; }
}

@media (forced-colors: active) {
  .course-node-icon,
  .course-capstone-icon,
  .course-entry-fept-node,
  .course-module-number,
  .course-completion-mark {
    border: 2px solid CanvasText;
    background: Canvas;
    color: CanvasText;
    box-shadow: none;
  }

  .course-path-node.is-current .course-node-card,
  .lesson-option:has(input:checked) {
    border: 3px solid Highlight;
  }
}

/* Screenshot-aligned course map and lesson explainer surfaces. */
.course-app-header {
  position: sticky;
  z-index: 60;
  top: 0;
  min-height: 70px;
  padding: 0 24px;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: clamp(1.5rem, 4vw, 4rem);
  border-color: color-mix(in srgb, var(--course-line-strong) 72%, transparent);
  background: color-mix(in srgb, var(--course-canvas) 94%, transparent);
  box-shadow: none;
}

.course-brand {
  justify-self: start;
  font-size: clamp(1.18rem, 1.8vw, 1.55rem);
}

.course-brand img { width: 0.8em; }

.course-primary-nav {
  display: flex;
  height: 70px;
  align-items: stretch;
  gap: 1.6rem;
}

.course-primary-nav a {
  position: relative;
  display: inline-flex;
  padding: 0 0.15rem;
  align-items: center;
  gap: 0.5rem;
  color: var(--course-ink-soft);
  font-size: 0.97rem;
  font-weight: 630;
  text-decoration: none;
}

.course-primary-nav a:hover,
.course-primary-nav a.is-active { color: var(--course-ink); }

.course-primary-nav a.is-active::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  content: "";
  background: currentColor;
}

.course-header-actions {
  position: relative;
  flex-wrap: nowrap;
  gap: 0.85rem;
}

.course-status-pill,
.course-menu-toggle {
  min-height: 46px;
  border: 1px solid var(--course-line-strong);
  background: color-mix(in srgb, var(--course-surface) 48%, transparent);
}

.course-status-pill {
  display: inline-flex;
  min-width: 88px;
  padding: 0 1rem;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  border-radius: 999px;
  color: var(--course-ink);
  font: inherit;
  cursor: pointer;
}

.course-status-pill strong { font-size: 1.15rem; }
.course-status-pill[data-course-streak] span { color: #f6aa1c; }
.course-status-pill[data-course-xp] span { color: #3477ff; font-size: 1.35rem; }

.course-status-pill:hover,
.course-status-pill[aria-expanded="true"] {
  color: var(--course-blue-deep);
  border-color: var(--course-blue);
  background: var(--course-blue-soft);
}

.course-status-pill:focus-visible,
.course-menu-toggle:focus-visible {
  outline: 3px solid #ffbf47;
  outline-offset: 3px;
}

.course-status-details {
  position: absolute;
  z-index: 90;
  top: calc(100% + 12px);
  right: 60px;
  width: min(320px, calc(100vw - 24px));
  color: var(--course-ink);
  border: 1px solid var(--course-line-strong);
  border-radius: 18px;
  background: var(--course-surface);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
}

.course-status-details[hidden],
.course-status-panel[hidden] { display: none; }

.course-status-panel {
  padding: 1.1rem;
}

.course-status-kicker {
  display: block;
  color: var(--course-blue-deep);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.course-status-value {
  display: block;
  margin-top: 0.25rem;
  font-size: 1.45rem;
  letter-spacing: -0.035em;
}

.course-status-panel > p {
  margin: 0.45rem 0 0;
  color: var(--course-ink-soft);
  font-size: 0.82rem;
  line-height: 1.45;
}

.course-status-panel dl {
  display: grid;
  margin: 0.9rem 0 0;
  gap: 0.65rem;
}

.course-status-panel dl > div {
  display: grid;
  padding-top: 0.65rem;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 0.8rem;
  border-top: 1px solid var(--course-line);
}

.course-status-panel dt,
.course-status-panel dd {
  margin: 0;
  font-size: 0.72rem;
  line-height: 1.4;
}

.course-status-panel dt { color: var(--course-muted); }
.course-status-panel dd { color: var(--course-ink); font-weight: 700; text-align: right; }

.course-menu-toggle {
  display: grid;
  width: 48px;
  padding: 0 14px;
  align-content: center;
  gap: 5px;
  border-radius: 12px;
  cursor: pointer;
}

.course-menu-toggle span {
  display: block;
  height: 2px;
  border-radius: 99px;
  background: var(--course-ink);
}

.course-header-menu {
  position: absolute;
  z-index: 80;
  top: calc(100% + 10px);
  right: 24px;
  display: grid;
  width: min(320px, calc(100vw - 32px));
  max-height: min(640px, calc(100vh - 94px));
  padding: 0.7rem;
  overflow: auto;
  gap: 0.18rem;
  border: 1px solid var(--course-line-strong);
  border-radius: 18px;
  background: var(--course-surface);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.32);
}

.course-header-menu[hidden] { display: none; }

.course-header-menu p {
  margin: 0;
  padding: 0.65rem 0.75rem 0.3rem;
  color: var(--course-muted);
  font-size: 0.68rem;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.course-header-menu a,
.course-menu-theme {
  display: flex;
  min-height: 44px;
  padding: 0.68rem 0.75rem;
  align-items: center;
  justify-content: space-between;
  color: var(--course-ink);
  font: inherit;
  font-weight: 680;
  text-align: left;
  text-decoration: none;
  border: 0;
  border-radius: 10px;
  background: transparent;
}

.course-header-menu a:hover,
.course-menu-theme:hover { background: var(--course-blue-soft); }

.course-menu-theme { width: 100%; cursor: pointer; }
.course-menu-theme > .course-theme-toggle { pointer-events: none; }

.course-header-menu a {
  justify-content: flex-start;
  gap: 0.75rem;
}

.course-menu-theme { gap: 0.75rem; }
.course-menu-theme > .course-theme-toggle { flex-shrink: 0; }

.course-runner-subbar {
  position: sticky;
  z-index: 50;
  top: 70px;
  display: grid;
  min-height: 45px;
  padding: 0 32px;
  grid-template-columns: minmax(180px, 1fr) minmax(260px, 1.6fr) minmax(180px, 1fr);
  align-items: center;
  border-bottom: 1px solid var(--course-line);
  background: color-mix(in srgb, var(--course-canvas) 96%, transparent);
  backdrop-filter: blur(18px);
}

.course-runner-subbar .course-back-link { padding: 0; }
.course-runner-subbar .course-runner-progress { width: min(100%, 420px); min-width: 0; }
.course-runner-context { justify-self: end; color: var(--course-muted); font-size: 0.82rem; }
.course-app-header + .course-runner-progress[hidden] { display: none; }

.course-main { min-height: calc(100vh - 70px); }
.course-view-lesson .course-main { min-height: calc(100vh - 115px); }

.course-overview {
  width: min(1490px, calc(100% - 64px));
  margin: 0 auto;
  padding: 32px 0 72px;
}

.course-map-layout {
  display: grid;
  grid-template-columns: minmax(340px, 430px) minmax(580px, 1fr);
  align-items: start;
  gap: clamp(4rem, 8vw, 8rem);
}

.course-summary-card {
  position: sticky;
  top: 102px;
  display: flex;
  min-height: 560px;
  padding: 28px 42px 42px;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--course-line-strong);
  border-radius: 22px;
  background: color-mix(in srgb, var(--course-surface) 68%, transparent);
}

.course-summary-art {
  width: calc(100% + 70px);
  height: 285px;
  margin: -28px -35px 0;
  object-fit: contain;
  filter: drop-shadow(0 24px 30px rgba(0, 0, 0, 0.28));
}

.course-summary-card h1 {
  margin: 0.25rem 0 0;
  font-size: clamp(2rem, 3.2vw, 2.6rem);
  letter-spacing: -0.045em;
}

.course-summary-card > p {
  max-width: 300px;
  margin: 0.65rem 0 1.5rem;
  color: var(--course-ink-soft);
  font-size: 1.05rem;
  line-height: 1.55;
}

.course-summary-card .course-overall-progress {
  min-width: 0;
  margin-top: auto;
  padding: 1.6rem 0 0;
  border-width: 1px 0 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.course-summary-card .course-overall-progress > span:first-child { display: none; }
.course-summary-card .course-overall-progress strong { margin: 0 0 0.6rem; font-size: 1.05rem; }
.course-summary-card .course-progress-track { height: 11px; margin-top: 0; }
.course-summary-card .course-progress-track::-webkit-progress-value,
.course-summary-card .course-progress-track::-moz-progress-bar { background: #2f6fff; }

.course-summary-storage {
  display: block;
  margin-top: 0.65rem;
  color: var(--course-muted);
  font-size: 0.72rem;
}

.course-summary-action {
  display: none;
  min-height: 48px;
  margin-top: 1rem;
  padding: 0 1rem;
  align-items: center;
  justify-content: space-between;
  color: #fff;
  font-weight: 800;
  text-decoration: none;
  border-radius: 12px;
  background: var(--course-blue);
}

.course-map-stage { min-width: 0; }

.course-module {
  overflow: visible;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.course-module + .course-module { margin-top: 2.25rem; }

.course-module > summary {
  position: relative;
  min-height: 82px;
  padding: 0.8rem 4rem;
  grid-template-columns: minmax(0, 1fr);
  justify-items: center;
  gap: 0.12rem;
  text-align: center;
  border: 1px solid var(--course-blue);
  border-radius: 22px;
  background: color-mix(in srgb, var(--course-surface) 38%, transparent);
}

.course-module-number { display: none; }
.course-module-title { width: 100%; justify-items: center; gap: 0.25rem; text-align: center; }
.course-module-title small { color: var(--course-blue-deep); font-size: 0.74rem; font-weight: 800; text-transform: uppercase; }
.course-module-title strong { font-size: 1.15rem; }
.course-module-status {
  position: absolute;
  top: 0.9rem;
  right: 1.15rem;
  color: var(--course-muted);
  font-size: 0.72rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.course-module-body {
  padding: 0.6rem 0 0;
  border: 0;
}

.course-module-intro,
.course-chapter-header,
.course-capstone-status { display: none; }

.course-chapter { margin: 0; padding: 0; border: 0; background: transparent; }
.course-orientation-complete { display: block; width: max-content; margin: 1rem auto; color: var(--course-green); text-decoration: none; }

.course-path {
  width: min(640px, 100%);
  margin: 0 auto;
  padding: 0.75rem 0;
  gap: 0;
}

.course-path::before {
  display: none;
}

.course-path-connector {
  position: absolute;
  z-index: 0;
  top: 0;
  bottom: 0;
  left: max(0px, calc(50% - 320px));
  width: 300px;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.course-path-connector path {
  fill: none;
  stroke: var(--course-green);
  stroke-width: 4;
  stroke-dasharray: 10 9;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
}

.course-path-node,
.course-path-node:nth-child(even) {
  position: relative;
  z-index: 1;
  min-height: 142px;
  justify-content: center;
}

.course-node-card {
  width: min(520px, 100%);
  min-height: 132px;
  padding: 0;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 0;
  border: 0;
  border-radius: 18px;
  background: transparent;
  box-shadow: none;
}

.course-node-card:hover {
  border: 0;
  background: transparent;
  transform: translateY(-2px);
}

.course-node-icon,
.lesson-stage-art,
.smarti-node-art {
  display: block;
  width: 180px;
  height: 142px;
  border: 0;
  border-radius: 0;
  background-color: transparent;
  background-image: url("/assets/course/course-node-sprites.webp");
  background-repeat: no-repeat;
  background-size: 300% 300%;
  box-shadow: none;
  filter: drop-shadow(0 16px 20px rgba(0, 0, 0, 0.34));
}

[data-node-art="bank"], .smarti-node-art--bank { background-position: 0 0; }
[data-node-art="transaction"], .smarti-node-art--transaction { background-position: 50% 0; }
[data-node-art="document"], .smarti-node-art--document { background-position: 100% 0; }
[data-node-art="chart"], .smarti-node-art--chart { background-position: 0 50%; }
[data-node-art="flag"], .smarti-node-art--flag { background-position: 50% 50%; }
[data-node-art="book"], .smarti-node-art--book { background-position: 100% 50%; }
[data-node-art="target"], .smarti-node-art--target { background-position: 0 100%; }
[data-node-art="brain"], .smarti-node-art--brain { background-position: 50% 100%; }
[data-node-art="lock"], .smarti-node-art--lock { background-position: 100% 100%; }

.course-node-state {
  position: absolute;
  top: 16px;
  left: 165px;
  display: grid;
  width: 26px;
  height: 26px;
  place-items: center;
  color: #05101b;
  font-size: 0.8rem;
  font-weight: 900;
  border-radius: 50%;
  background: #20d1c7;
}

.course-node-state:empty { display: none; }
.course-node-copy { align-content: center; gap: 0.5rem; }
.course-node-copy strong { font-size: 1.02rem; line-height: 1.32; }
.course-node-copy small { display: none; }
.course-node-copy span { color: var(--course-muted); font-size: 0.82rem; }
.course-node-continue {
  display: flex;
  min-height: 50px;
  margin-top: 0.35rem;
  align-items: center;
  justify-content: center;
  color: #fff !important;
  font-size: 1rem !important;
  font-weight: 800;
  border-radius: 999px;
  background: linear-gradient(180deg, #3979ff, #1d58e9);
  box-shadow: 0 8px 18px rgba(35, 102, 255, 0.3);
}

.course-path-node.is-current .course-node-card {
  padding: 0.4rem 1rem 0.4rem 0;
  border: 1px solid var(--course-line-strong);
  background: color-mix(in srgb, var(--course-surface) 62%, transparent);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.14);
}

.course-path-node.is-current .course-node-icon { animation: course-node-glow 2.2s ease-in-out infinite; }
.course-path-node.is-complete .course-node-icon,
.course-path-node.is-review .course-node-icon {
  border: 0;
  background-color: transparent;
  background-image: url("/assets/course/course-node-sprites.webp");
  box-shadow: none;
}
.course-path-node.is-planned { opacity: 0.62; }
.course-path-node.is-planned .course-node-card { background: transparent; }
.course-path-capstone { margin-top: 0; }
.course-availability-note { margin: 2rem auto 0; color: var(--course-muted); font-size: 0.78rem; text-align: center; }

.course-view-lesson .course-app-footer,
.course-view-orientation .course-app-footer,
.course-view-checkpoint .course-app-footer { display: none; }

.course-view-lesson .lesson-shell {
  display: grid;
  min-height: calc(100vh - 115px);
  padding: 0 0 94px;
  grid-template-columns: clamp(200px, 16vw, 250px) minmax(0, 1fr);
  align-items: start;
  column-gap: clamp(1.25rem, 2.4vw, 2.5rem);
  background: transparent;
}

.course-view-lesson .lesson-shell--visual {
  grid-template-columns: clamp(200px, 16vw, 250px) minmax(520px, 1fr) 275px;
}

.course-view-lesson .lesson-shell > .lesson-progress {
  position: sticky;
  top: 115px;
  grid-column: 1;
  grid-row: 1 / span 4;
  height: calc(100vh - 115px);
  padding: 42px 18px 90px clamp(20px, 3vw, 48px);
  border: 0;
  border-right: 1px solid var(--course-line);
  background: color-mix(in srgb, var(--course-surface) 34%, transparent);
}

.course-view-lesson .lesson-shell .lesson-progress-track {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.course-view-lesson .lesson-shell .lesson-stage-nav {
  position: relative;
  display: grid;
  width: 100%;
  min-height: 0;
  margin: 0;
  padding: 0;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.course-view-lesson .lesson-shell .lesson-stage-nav::before {
  position: absolute;
  top: 62px;
  bottom: 62px;
  left: 52px;
  width: 3px;
  content: "";
  background: repeating-linear-gradient(to bottom, var(--course-line-strong) 0 9px, transparent 9px 16px);
}

.course-view-lesson .lesson-shell .lesson-stage-nav > span {
  position: relative;
  display: grid;
  min-height: 124px;
  grid-template-columns: 106px minmax(0, 1fr);
  grid-template-rows: 1fr 1fr;
  align-items: end;
  justify-items: start;
  place-items: initial;
  color: var(--course-ink);
}

.lesson-stage-art {
  z-index: 1;
  width: 104px;
  height: 84px;
  grid-row: 1 / 3;
  align-self: center;
}

.course-view-lesson .lesson-shell .lesson-stage-nav b { align-self: end; font-size: 0.9rem; }
.course-view-lesson .lesson-shell .lesson-stage-nav small { align-self: start; margin-top: 0.25rem; color: var(--course-muted); font-size: 0.78rem; }
.course-view-lesson .lesson-shell .lesson-stage-nav .is-current b { color: #3477ff; }
.course-view-lesson .lesson-shell .lesson-stage-nav .is-complete small { color: #20cfc5; }
.course-view-lesson .lesson-shell .lesson-stage-nav .is-locked { opacity: 0.68; }

.course-view-lesson .lesson-shell > .lesson-card {
  grid-column: 2;
  width: min(860px, calc(100% - 2rem));
  margin: clamp(2rem, 6vh, 4rem) auto 2rem;
}

.lesson-card--visual {
  width: min(100%, 890px);
  margin: 22px auto 0;
}

.lesson-course-visual { width: 100%; }

.lesson-progress-panel {
  position: sticky;
  top: 140px;
  grid-column: 3;
  grid-row: 1;
  min-height: 620px;
  margin: 48px 32px 0 0;
  padding: 28px 24px;
  border: 1px solid var(--course-line-strong);
  border-radius: 18px;
  background: color-mix(in srgb, var(--course-surface) 48%, transparent);
}

.lesson-progress-panel h2 { margin: 0 0 0.6rem; font-size: 0.95rem; }
.lesson-progress-panel > strong { display: block; color: var(--course-ink-soft); font-size: 1.2rem; font-weight: 500; }
.lesson-progress-panel > progress { width: 100%; height: 9px; margin: 0.85rem 0 1.7rem; accent-color: #3176ff; }
.lesson-progress-panel ol { display: grid; margin: 0; padding: 1.2rem 0; gap: 0.85rem; border-top: 1px solid var(--course-line); list-style: none; }
.lesson-progress-panel li { display: grid; min-height: 64px; grid-template-columns: 38px 1fr; gap: 0.65rem; }
.lesson-progress-panel li > span { display: grid; width: 34px; height: 34px; place-items: center; color: var(--course-muted); border: 2px solid currentColor; border-radius: 50%; }
.lesson-progress-panel li.is-complete > span { color: #20cfc5; }
.lesson-progress-panel li.is-active > span { color: #3477ff; box-shadow: inset 0 0 0 8px color-mix(in srgb, #3477ff 20%, transparent); }
.lesson-progress-panel li div { display: grid; align-content: center; }
.lesson-progress-panel li small { margin-top: 0.2rem; color: var(--course-muted); }
.lesson-progress-panel li.is-active strong,
.lesson-progress-panel li.is-active small { color: #3477ff; }
.lesson-progress-panel > p { margin: auto 0 0; padding-top: 1rem; border-top: 1px solid var(--course-line); color: var(--course-ink-soft); }
.lesson-progress-panel > p span,
.lesson-progress-panel > p strong { color: #20cfc5; }

.lesson-shell--visual > .lesson-video-inline { grid-column: 2; }

.smarti-lesson-explainer > h1 {
  margin: 0 0 1rem;
  color: var(--course-ink);
  font-size: clamp(2rem, 3.2vw, 2.65rem);
  line-height: 1.1;
  letter-spacing: -0.035em;
  text-align: center;
}

.smarti-lesson-explainer__objective {
  width: min(720px, 100%);
  margin: -0.35rem auto 1rem;
  color: var(--course-ink-soft);
  line-height: 1.5;
  text-align: center;
}

.smarti-lesson-explainer .smarti-concept-map {
  --ink: var(--course-ink);
  --ink-soft: var(--course-ink-soft);
  --muted: var(--course-muted);
  --surface: var(--course-surface);
  --line: var(--course-line);
  --line-strong: var(--course-line-strong);
}

.smarti-value-steps {
  display: grid;
  width: min(610px, 100%);
  margin: 0 auto 0.5rem;
  padding: 0;
  grid-template-columns: repeat(4, 1fr);
  list-style: none;
}

.smarti-value-steps li { display: grid; justify-items: center; color: var(--course-muted); }
.smarti-value-steps li > span { display: grid; width: 52px; height: 52px; margin-bottom: 0.5rem; place-items: center; font-size: 1.25rem; border: 2px solid currentColor; border-radius: 50%; }
.smarti-value-steps li strong { color: var(--course-ink); font-size: 0.92rem; }
.smarti-value-steps li small { margin-top: 0.2rem; }
.smarti-value-steps .is-complete { color: #20cfc5; }
.smarti-value-steps .is-active { color: #3477ff; }
.smarti-value-steps .is-active strong { color: #3477ff; }

.smarti-value-map {
  position: relative;
  display: grid;
  min-height: 350px;
  grid-template-columns: repeat(3, minmax(140px, 1fr));
  grid-template-rows: 220px 130px;
  align-items: center;
}

.smarti-value-node,
.smarti-value-result { position: relative; z-index: 2; display: grid; justify-items: center; color: #20cfc5; text-transform: uppercase; }
.smarti-value-node--proceeds { color: #3477ff; }
.smarti-value-node .smarti-node-art,
.smarti-value-result .smarti-node-art { width: 190px; height: 152px; }
.smarti-value-node--investor img { width: 190px; height: 162px; object-fit: contain; filter: drop-shadow(0 18px 20px rgba(0,0,0,.34)); }
.smarti-value-node strong,
.smarti-value-result strong { margin-top: -0.5rem; font-size: 1rem; }
.smarti-value-result { grid-column: 2; }
.smarti-value-connector { position: absolute; z-index: 0; height: 100px; border-top: 4px dashed #20cfc5; border-radius: 50%; opacity: 0.8; }
.smarti-value-connector--left { top: 125px; left: 22%; width: 29%; transform: rotate(-6deg); }
.smarti-value-connector--right { top: 125px; right: 22%; width: 29%; transform: rotate(6deg); }

.smarti-value-check {
  display: grid;
  padding: 16px 18px;
  grid-template-columns: minmax(0, 1.4fr) minmax(300px, 1fr);
  align-items: center;
  gap: 0.75rem 1rem;
  border: 1px solid var(--course-line-strong);
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-surface) 55%, transparent);
}

.smarti-value-check > p { display: flex; margin: 0; align-items: flex-start; gap: 0.8rem; font-weight: 700; line-height: 1.45; }
.smarti-value-check > p > span { display: grid; width: 44px; height: 44px; flex: 0 0 auto; place-items: center; color: #3477ff; border: 1px solid currentColor; border-radius: 50%; }
.smarti-value-choices { display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; }
.smarti-value-choices button { display: flex; min-height: 58px; padding: 0.65rem 0.75rem; align-items: center; color: var(--course-ink); font: inherit; text-align: left; border: 1px solid var(--course-line-strong); border-radius: 8px; background: transparent; cursor: pointer; }
.smarti-value-choices button span { display: inline-block; width: 24px; height: 24px; margin-right: 0.6rem; vertical-align: middle; border: 2px solid var(--course-line-strong); border-radius: 50%; }
.smarti-value-choices button b { min-width: 0; font-size: 0.8rem; line-height: 1.35; }
.smarti-value-choices button.is-selected { border-color: #3477ff; background: color-mix(in srgb, #3477ff 8%, transparent); }
.smarti-value-choices button.is-selected span { border-color: #3477ff; box-shadow: inset 0 0 0 6px var(--course-canvas); background: #3477ff; }
.smarti-value-feedback { display: flex; min-height: 52px; padding: 0.55rem 0.9rem; grid-column: 1 / -1; align-items: center; gap: 0.7rem; color: #20cfc5; border: 1px solid color-mix(in srgb, #20cfc5 55%, transparent); border-radius: 9px; background: color-mix(in srgb, #20cfc5 10%, transparent); }
.smarti-value-feedback[hidden] { display: none; }
.smarti-value-feedback.is-review { color: var(--course-amber); border-color: color-mix(in srgb, var(--course-amber) 55%, transparent); background: color-mix(in srgb, var(--course-amber) 10%, transparent); }
.smarti-value-feedback small { margin-left: auto; white-space: nowrap; }
.smarti-memory-rule { display: flex; margin: 0.85rem 0 0; justify-content: center; gap: 0.65rem; color: var(--course-ink-soft); }
.smarti-memory-rule span { color: #20cfc5; }

.smarti-concept-summary {
  width: min(760px, 100%);
  margin: 1rem auto;
  padding: 1rem 1.2rem;
  color: var(--course-ink-soft);
  border: 1px solid var(--course-line-strong);
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-surface) 55%, transparent);
}

.smarti-concept-summary strong { display: block; margin-bottom: 0.35rem; color: var(--course-blue-deep); }
.smarti-concept-summary p { margin: 0; line-height: 1.5; }
.lesson-recall-cue { padding: 0.8rem 1rem; color: var(--course-ink-soft); border-left: 3px solid var(--course-blue); border-radius: 0 10px 10px 0; background: var(--course-blue-soft); }
.lesson-recall-cue strong { color: var(--course-blue-deep); }

.lesson-shell--visual > .lesson-video-status { display: none; }
.lesson-shell--visual .lesson-action-layout { width: min(1440px, 100%); grid-template-columns: 250px minmax(400px, 1fr) 275px; }
.lesson-shell--visual .lesson-action-note { grid-column: 2; text-align: center; }
.lesson-shell--visual .lesson-action-controls { grid-column: 3; }

[data-theme="light"] .course-page,
.course-page:not([data-theme="dark"]) {
  background: radial-gradient(circle at 65% 0, rgba(52, 119, 255, 0.1), transparent 38rem), var(--course-canvas);
}

[data-theme="dark"] .course-page {
  --course-canvas: #050a12;
  --course-surface: #0b121e;
  --course-line: #25303e;
  --course-line-strong: #3a4350;
  --course-ink-soft: #c0c5ce;
  --course-muted: #8f97a4;
  --course-blue: #2d70ff;
  --course-blue-deep: #367cff;
  background:
    radial-gradient(circle at 60% 12%, rgba(21, 89, 212, 0.09), transparent 32rem),
    radial-gradient(circle at 50% 60%, rgba(3, 184, 194, 0.035), transparent 36rem),
    var(--course-canvas);
}

@media (max-width: 1180px) {
  .course-map-layout { grid-template-columns: 340px minmax(480px, 1fr); gap: 2.5rem; }
  .course-view-lesson .lesson-shell { grid-template-columns: 190px minmax(0, 1fr); column-gap: 1rem; }
  .course-view-lesson .lesson-shell--visual { grid-template-columns: 190px minmax(480px, 1fr) 230px; }
  .course-view-lesson .lesson-shell > .lesson-progress { padding-left: 18px; padding-right: 10px; }
  .course-view-lesson .lesson-shell .lesson-stage-nav > span { grid-template-columns: 96px minmax(0, 1fr); }
  .lesson-stage-art { width: 96px; height: 78px; }
  .course-view-lesson .lesson-shell .lesson-stage-nav::before { left: 48px; }
  .lesson-progress-panel { margin-right: 16px; padding: 22px 16px; }
}

@media (max-width: 960px) {
  .course-app-header { grid-template-columns: auto 1fr auto; gap: 1rem; }
  .course-primary-nav a:first-child { display: none; }
  .course-map-layout { grid-template-columns: 1fr; }
  .course-summary-card { position: relative; top: auto; min-height: 0; }
  .course-summary-action { display: flex; }
  .course-map-stage { width: min(720px, 100%); margin: 0 auto; }
  .course-view-lesson .lesson-shell,
  .course-view-lesson .lesson-shell--visual { grid-template-columns: 178px minmax(0, 1fr); }
  .course-view-lesson .lesson-shell > .lesson-progress { padding-left: 12px; padding-right: 8px; }
  .course-view-lesson .lesson-shell .lesson-stage-nav > span { grid-template-columns: 82px minmax(0, 1fr); }
  .course-view-lesson .lesson-shell .lesson-stage-nav::before { left: 41px; }
  .lesson-stage-art { width: 82px; height: 66px; }
  .lesson-progress-panel { position: relative; top: auto; min-height: 0; width: min(860px, calc(100% - 2rem)); margin: 1rem auto 2rem; }
  .lesson-shell--visual .lesson-progress-panel { grid-column: 2; grid-row: auto; }
  .lesson-progress-panel ol { grid-template-columns: repeat(3, 1fr); }
  .lesson-shell--visual .lesson-action-layout { grid-template-columns: minmax(0, 1fr) auto; }
  .lesson-shell--visual .lesson-action-note { grid-column: 1; }
  .lesson-shell--visual .lesson-action-controls { grid-column: 2; }
}

@media (max-width: 700px) {
  .course-view-lesson .course-app-header,
  .course-view-orientation .course-app-header,
  .course-view-checkpoint .course-app-header {
    min-height: 62px;
    padding: 0 10px;
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: 1fr;
    gap: 0.45rem;
  }
  .course-view-lesson .course-header-actions,
  .course-view-orientation .course-header-actions,
  .course-view-checkpoint .course-header-actions {
    display: flex;
    grid-column: 2;
    grid-row: 1;
  }
  .course-app-header {
    min-height: 62px;
    padding: 0 10px;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.45rem;
  }
  .course-app-header > .course-primary-nav {
    grid-column: 1;
    grid-row: 1;
  }
  .course-app-header > .course-header-actions {
    grid-column: 2;
    grid-row: 1;
  }
  .course-brand { font-size: 1rem; }
  .course-brand span { display: none; }
  .course-brand img { width: 28px; height: 28px; }
  .course-primary-nav { height: 62px; }
  .course-primary-nav a:first-child { display: none; }
  .course-primary-nav a { font-size: 0; }
  .course-primary-nav a span { font-size: 1.15rem; }
  .course-header-actions { justify-self: end; gap: 0.3rem; }
  .course-status-pill { min-width: 46px; min-height: 40px; padding: 0 0.45rem; gap: 0.3rem; }
  .course-status-pill strong { font-size: 0.95rem; }
  .course-status-pill[data-course-xp] span { font-size: 1.1rem; }
  .course-menu-toggle { width: 42px; min-height: 42px; }
  .course-status-details { top: calc(100% + 10px); right: 0; }
  .course-runner-subbar { top: 62px; min-height: 42px; padding: 0 12px; grid-template-columns: 1fr auto; }
  .course-runner-subbar .course-runner-progress { display: none; }
  .course-runner-context { font-size: 0.7rem; }
  .course-overview { width: min(100% - 24px, 640px); padding-top: 18px; }
  .course-summary-card { padding: 18px 22px 24px; border-radius: 18px; }
  .course-summary-art { height: 210px; }
  .course-summary-card h1 { font-size: 1.8rem; }
  .course-module > summary { padding-inline: 3.25rem; border-radius: 16px; }
  .course-module-status { top: 0.8rem; right: 0.85rem; }
  .course-node-card { grid-template-columns: 140px minmax(0, 1fr); }
  .course-node-icon { width: 132px; height: 106px; }
  .course-path-connector { left: 0; width: 132px; }
  .course-node-state { top: 10px; left: 118px; }
  .course-path-node.is-current .course-node-card { padding-right: 0.55rem; }
  .course-node-copy strong { font-size: 0.9rem; }
  .course-node-copy span { font-size: 0.72rem; }
  .course-node-continue { min-height: 42px; }
  .course-view-lesson .lesson-shell,
  .course-view-lesson .lesson-shell--visual { grid-template-columns: 1fr; }
  .course-view-lesson .lesson-shell > .lesson-progress {
    position: relative;
    top: auto;
    grid-column: 1;
    grid-row: auto;
    height: auto;
    padding: 0.38rem 0.65rem 0.45rem;
    border-right: 0;
    border-bottom: 1px solid var(--course-line);
  }
  .course-view-lesson .lesson-shell .lesson-stage-nav { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0.25rem; }
  .course-view-lesson .lesson-shell .lesson-stage-nav::before {
    top: 6px;
    right: 12.5%;
    bottom: auto;
    left: 12.5%;
    width: auto;
    height: 2px;
    background: repeating-linear-gradient(to right, var(--course-line-strong) 0 9px, transparent 9px 16px);
  }
  .course-view-lesson .lesson-shell .lesson-stage-nav > span {
    position: relative;
    min-height: 48px;
    padding-top: 15px;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto;
    justify-items: center;
    text-align: center;
  }
  .course-view-lesson .lesson-shell .lesson-stage-nav > span::before {
    position: absolute;
    z-index: 2;
    top: 1px;
    left: 50%;
    width: 10px;
    height: 10px;
    content: "";
    border: 2px solid var(--course-line-strong);
    border-radius: 50%;
    background: var(--course-canvas);
    transform: translateX(-50%);
  }
  .course-view-lesson .lesson-shell .lesson-stage-nav > span.is-complete::before {
    border-color: var(--course-green);
    background: var(--course-green);
  }
  .course-view-lesson .lesson-shell .lesson-stage-nav > span.is-current::before {
    border-color: var(--course-blue);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--course-blue) 22%, transparent);
    background: var(--course-blue);
  }
  .course-view-lesson .lesson-shell .lesson-stage-nav b { font-size: 0.7rem; }
  .course-view-lesson .lesson-shell .lesson-stage-nav small { margin-top: 0.08rem; font-size: 0.6rem; }
  .course-view-lesson .lesson-shell > .lesson-card,
  .lesson-shell--visual .lesson-progress-panel,
  .lesson-shell--visual > .lesson-video-inline { grid-column: 1; }
  .lesson-stage-art { display: none; }
  .lesson-card--visual { width: min(100% - 20px, 620px); }
  .smarti-lesson-explainer > h1 { margin-top: 0.5rem; font-size: 1.65rem; }
  .smarti-lesson-explainer__objective { margin-bottom: 0.65rem; font-size: 0.82rem; }
  .smarti-value-steps { margin-bottom: 0.25rem; }
  .smarti-value-steps li > span { display: none; }
  .smarti-value-steps li strong { font-size: 0.7rem; }
  .smarti-value-steps li small { font-size: 0.62rem; }
  .smarti-value-map { min-height: 330px; grid-template-columns: 1fr 1fr; grid-template-rows: 135px 120px 70px; }
  .smarti-value-node--proceeds { grid-column: 1 / -1; grid-row: 1; }
  .smarti-value-node--issuer { grid-column: 1; grid-row: 2; }
  .smarti-value-node--investor { grid-column: 2; grid-row: 2; }
  .smarti-value-result { grid-column: 1 / -1; grid-row: 3; }
  .smarti-value-node .smarti-node-art,
  .smarti-value-result .smarti-node-art,
  .smarti-value-node--investor img { width: 112px; height: 90px; }
  .smarti-value-node strong,
  .smarti-value-result strong { font-size: 0.78rem; }
  .smarti-value-connector { display: none; }
  .smarti-value-check { grid-template-columns: 1fr; padding: 12px; }
  .smarti-value-choices { grid-template-columns: 1fr; }
  .smarti-value-feedback { align-items: flex-start; flex-wrap: wrap; font-size: 0.78rem; }
  .smarti-value-feedback small { width: 100%; margin-left: 0; }
  .smarti-memory-rule { font-size: 0.82rem; text-align: center; }
  .lesson-progress-panel { width: min(100% - 20px, 620px); margin: 0.65rem auto 1rem; padding: 0.85rem 1rem; }
  .lesson-progress-panel > progress { margin: 0.55rem 0 0; }
  .lesson-progress-panel ol,
  .lesson-progress-panel > p { display: none; }
  .lesson-shell--visual > .lesson-video-inline { display: none; }
  .lesson-action-bar { min-height: 90px; }
  .lesson-shell--visual .lesson-action-layout { grid-template-columns: 1fr; }
  .lesson-shell--visual .lesson-action-note,
  .lesson-shell--visual .lesson-action-controls { grid-column: 1; }
  .lesson-shell--visual .lesson-action-note { display: none; }
}

/* Compact, truthful lesson hierarchy: stage and item progress share one sticky banner. */
.course-view-lesson .course-runner-subbar {
  z-index: 55;
  min-height: 88px;
  padding: 8px 24px;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 720px) minmax(0, 1fr);
  gap: 0;
}

.course-runner-subbar .course-back-link {
  display: grid;
  width: 44px;
  min-height: 44px;
  padding: 0;
  place-items: center;
  color: var(--course-ink);
  font-size: 1.35rem;
  border: 1px solid var(--course-line-strong);
  border-radius: 12px;
  background: color-mix(in srgb, var(--course-surface) 60%, transparent);
}

.course-view-lesson .course-runner-subbar .course-runner-progress {
  width: 100%;
  min-width: 0;
  grid-column: 2;
  justify-self: center;
}

.lesson-runner-progress {
  display: grid;
  min-width: 0;
  gap: 5px;
}

.lesson-stage-progress {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 4px;
}

.lesson-stage-progress > span {
  position: relative;
  display: grid;
  color: var(--course-muted);
}

.lesson-stage-progress > span > button {
  position: relative;
  display: flex;
  width: 100%;
  min-width: 44px;
  min-height: 54px;
  padding: 0.4rem 0.55rem 0.65rem;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  color: inherit;
  font: inherit;
  border: 0;
  border-radius: 10px 10px 0 0;
  background: transparent;
  cursor: pointer;
}

.lesson-stage-progress > span > button:hover { background: var(--course-blue-soft); }

.lesson-stage-progress > span > button::after {
  position: absolute;
  right: 2px;
  bottom: 0;
  left: 2px;
  height: 4px;
  content: "";
  border-radius: 999px 999px 0 0;
  background: var(--course-line-strong);
}

.lesson-stage-progress > span > button:focus-visible {
  outline: 3px solid #ffbf47;
  outline-offset: 2px;
}

.lesson-stage-progress > span::before {
  display: none;
}

.lesson-stage-progress b {
  font-size: 0.78rem;
  line-height: 1;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.lesson-stage-icon {
  display: grid;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  place-items: center;
}

.lesson-stage-icon svg {
  width: 22px;
  height: 22px;
}

.lesson-stage-progress > .is-complete {
  color: var(--course-green);
}

.lesson-stage-progress > .is-complete > button::after {
  background: var(--course-green);
}

.lesson-stage-progress > .is-current {
  color: var(--course-blue-deep);
}

.lesson-stage-progress > .is-current > button::after {
  background: var(--course-blue);
}

.lesson-item-dots {
  display: flex;
  flex-wrap: wrap;
  min-height: 12px;
  align-items: center;
  justify-content: center;
  gap: 7px;
}

.lesson-item-dots > i {
  display: block;
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
  border: 1px solid var(--course-line-strong);
  border-radius: 50%;
  background: transparent;
}

.lesson-item-dots > .is-complete {
  border-color: var(--course-green);
  background: var(--course-green);
}

.lesson-item-dots > .is-current {
  width: 11px;
  height: 11px;
  border-color: var(--course-blue);
  background: var(--course-blue);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--course-blue) 20%, transparent);
}

@media (max-width: 380px) {
  .lesson-stage-progress > span > button { flex-direction: column; }
}

.lesson-card--practice {
  margin-top: clamp(1rem, 3vh, 2rem);
}

.lesson-practice-question {
  margin: 0 0 1rem;
  color: var(--course-ink);
  font-size: clamp(1.35rem, 3vw, 1.8rem);
  line-height: 1.2;
}

.lesson-card--timed {
  width: min(940px, calc(100% - 2rem));
  margin-top: clamp(1rem, 3vh, 2rem);
}

.fept-method {
  display: grid;
  margin-bottom: 1.35rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.55rem;
}

.fept-method > span {
  display: grid;
  min-width: 0;
  padding: 0.7rem 0.45rem;
  place-items: center;
  gap: 0.25rem;
  color: var(--course-muted);
  border: 1px solid var(--course-line);
  border-radius: 14px;
  background: var(--course-entry-layer);
}

.fept-method > span.is-current {
  color: var(--course-blue-deep);
  border-color: var(--course-blue);
  background: var(--course-blue-soft);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--course-blue) 16%, transparent);
}

.fept-method b { font-size: 1.3rem; line-height: 1; }
.fept-method small { overflow-wrap: anywhere; font-size: 0.72rem; font-weight: 750; text-align: center; }

.timed-mastery-intro h1,
.timed-mastery-running h1,
.timed-mastery-result h1 {
  margin: 0.35rem 0 0;
  color: var(--course-ink);
  font-size: clamp(1.55rem, 4vw, 2.35rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.timed-mastery-intro > p,
.timed-mastery-result > p {
  max-width: 70ch;
}

.timed-mastery-rules {
  display: grid;
  margin: 1.25rem 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.65rem;
}

.timed-mastery-rules > span {
  display: grid;
  min-height: 86px;
  padding: 0.85rem;
  align-content: center;
  gap: 0.2rem;
  border: 1px solid var(--course-line);
  border-radius: 14px;
  background: var(--course-entry-layer);
}

.timed-mastery-rules strong { color: var(--course-blue-deep); font-size: 1.25rem; }
.timed-mastery-rules small { color: var(--course-muted); line-height: 1.35; }

.timed-mastery-mode {
  display: grid;
  margin: 1.25rem 0 0;
  padding: 0;
  gap: 0.65rem;
  border: 0;
}

.timed-mastery-mode legend {
  margin-bottom: 0.65rem;
  color: var(--course-ink);
  font-weight: 820;
}

.timed-mastery-mode label {
  display: grid;
  min-height: 62px;
  padding: 0.8rem 0.95rem;
  grid-template-columns: 26px minmax(0, 1fr);
  align-items: center;
  gap: 0.7rem;
  color: var(--course-ink);
  border: 1px solid var(--course-line);
  border-radius: 14px;
  background: var(--course-surface);
  cursor: pointer;
}

.timed-mastery-mode label:has(input:checked) {
  border: 2px solid var(--course-blue);
  background: var(--course-blue-soft);
}

.timed-mastery-mode input { width: 20px; height: 20px; accent-color: var(--course-blue); }
.timed-mastery-mode span { display: grid; gap: 0.18rem; }
.timed-mastery-mode small { color: var(--course-muted); line-height: 1.35; }
.timed-mastery-disclosure { margin-bottom: 0; font-size: 0.84rem; }

.timed-mastery-toolbar {
  position: sticky;
  z-index: 4;
  top: 0;
  display: grid;
  padding-bottom: 1rem;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid var(--course-line);
  background: color-mix(in srgb, var(--course-surface) 94%, transparent);
  backdrop-filter: blur(12px);
}

.timed-mastery-timer {
  display: grid;
  min-width: 112px;
  min-height: 76px;
  padding: 0.7rem 0.9rem;
  place-items: center;
  color: var(--course-blue-deep);
  border: 1px solid var(--course-blue);
  border-radius: 16px;
  background: var(--course-blue-soft);
}

.timed-mastery-timer strong { font-variant-numeric: tabular-nums; font-size: 1.55rem; line-height: 1; }
.timed-mastery-timer small { font-size: 0.7rem; font-weight: 760; letter-spacing: 0.04em; text-transform: uppercase; }
.timed-mastery-timer.is-urgent { color: #8b3f00; border-color: #d58b25; background: var(--course-amber-soft); }

.timed-mastery-answer-status {
  display: flex;
  margin: 0.9rem 0;
  align-items: baseline;
  gap: 0.35rem;
  color: var(--course-muted);
}

.timed-mastery-answer-status strong { color: var(--course-ink); }

.timed-mastery-confirm,
.timed-mastery-repair {
  padding: 0.9rem 1rem;
  color: var(--course-ink);
  border: 1px solid #d58b25;
  border-radius: 14px;
  background: var(--course-amber-soft);
}

.timed-mastery-confirm p { margin: 0.35rem 0 0; }
.timed-mastery-questions,
.timed-mastery-results { display: grid; margin-top: 1rem; gap: 1rem; }

.timed-mastery-question,
.timed-mastery-question-result {
  padding: clamp(1rem, 3vw, 1.4rem);
  border: 1px solid var(--course-line);
  border-radius: 18px;
  background: var(--course-surface);
}

.timed-mastery-question header span,
.timed-mastery-question-result header span {
  color: var(--course-blue-deep);
  font-size: 0.75rem;
  font-weight: 820;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.timed-mastery-question h2,
.timed-mastery-question-result h2 {
  margin: 0.35rem 0 0;
  color: var(--course-ink);
  font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  line-height: 1.35;
}

.timed-mastery-result.is-success { border-color: #53a97a; background: var(--course-green-soft); }
.timed-mastery-result.is-review { border-color: #d58b25; background: var(--course-amber-soft); }

.timed-mastery-score {
  display: inline-grid;
  min-width: 145px;
  margin-top: 0.75rem;
  padding: 0.8rem 1rem;
  gap: 0.1rem;
  border: 1px solid currentColor;
  border-radius: 14px;
}

.timed-mastery-score strong { font-size: 1.55rem; }
.timed-mastery-score span { font-size: 0.75rem; font-weight: 760; text-transform: uppercase; }
.timed-mastery-question-result.is-correct { border-color: #53a97a; background: var(--course-green-soft); }
.timed-mastery-question-result.is-incorrect { border-color: #d58b25; background: var(--course-amber-soft); }
.timed-mastery-question-result p { margin: 0.75rem 0 0; color: var(--course-ink-soft); line-height: 1.6; }
.timed-mastery-question-result p strong { display: inline; color: var(--course-ink); }

.course-view-lesson .lesson-shell,
.course-view-lesson .lesson-shell--visual {
  min-height: calc(100vh - 148px);
  grid-template-columns: minmax(0, 1fr);
  column-gap: 0;
}

.course-view-lesson .lesson-shell > .lesson-progress {
  display: none;
}

.course-view-lesson .lesson-shell > .lesson-card,
.lesson-shell--visual > .lesson-video-inline {
  grid-column: 1;
}

.lesson-card--visual {
  width: min(940px, calc(100% - 2rem));
}

.lesson-shell--visual .lesson-action-layout {
  width: min(900px, 100%);
  grid-template-columns: minmax(0, 1fr) minmax(320px, 1.25fr);
}

.lesson-shell--visual .lesson-action-note { grid-column: 1; }
.lesson-shell--visual .lesson-action-controls { grid-column: 2; }

.smarti-teaching-grid {
  display: grid;
  width: min(860px, 100%);
  margin: 1rem auto 0;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.smarti-teaching-card {
  display: grid;
  min-width: 0;
  padding: 1rem;
  grid-template-columns: 36px minmax(0, 1fr);
  align-items: start;
  gap: 0.7rem;
  border: 1px solid var(--course-line-strong);
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-surface) 64%, transparent);
}

.smarti-teaching-card > span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--course-blue-deep);
  font-weight: 900;
  border: 2px solid currentColor;
  border-radius: 50%;
  background: var(--course-blue-soft);
}

.smarti-teaching-card--example > span { color: var(--course-green); }
.smarti-teaching-card--trap > span { color: var(--course-amber); }
.smarti-teaching-card strong { display: block; color: var(--course-ink); font-size: 0.84rem; }
.smarti-teaching-card p { margin: 0.35rem 0 0; color: var(--course-ink-soft); font-size: 0.78rem; line-height: 1.45; }

.smarti-explainer-modes {
  display: grid;
  width: min(620px, 100%);
  margin: 0 auto 1rem;
  padding: 4px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px;
  border: 1px solid var(--course-line-strong);
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-surface) 58%, transparent);
}

.smarti-explainer-modes button {
  display: inline-flex;
  min-height: 48px;
  padding: 0.7rem 1rem;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  color: var(--course-ink-soft);
  font: inherit;
  font-weight: 780;
  border: 0;
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}

.smarti-explainer-modes button:hover { color: var(--course-ink); background: var(--course-blue-soft); }
.smarti-explainer-modes button.is-active { color: #fff; background: var(--course-blue); box-shadow: 0 8px 22px rgba(52, 119, 255, 0.24); }
.smarti-explainer-modes button:focus-visible { outline: 3px solid #ffbf47; outline-offset: 2px; }
.smarti-explainer-modes button:disabled { opacity: 0.5; cursor: not-allowed; }
[data-explainer-pane][hidden] { display: none; }

.smarti-mapped-scenario {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 1.5rem);
  border: 1px solid var(--course-line-strong);
  border-radius: 18px;
  background: color-mix(in srgb, var(--course-surface) 70%, transparent);
  box-shadow: 0 18px 48px rgba(7, 19, 60, 0.1);
}

.smarti-question-map {
  display: flex;
  margin: 0 0 0.85rem;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--course-muted);
  font-size: 0.72rem;
}

.smarti-question-map span {
  color: var(--course-green);
  font-weight: 850;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.smarti-mapped-scenario h2 {
  margin: 0;
  color: var(--course-ink);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.4;
}

.smarti-scenario-choices {
  display: grid;
  margin-top: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.smarti-scenario-choices button {
  display: grid;
  min-height: 64px;
  padding: 0.72rem;
  grid-template-columns: 30px minmax(0, 1fr);
  align-items: center;
  gap: 0.65rem;
  color: var(--course-ink);
  font: inherit;
  font-size: 0.8rem;
  font-weight: 680;
  line-height: 1.35;
  text-align: left;
  border: 1px solid var(--course-line-strong);
  border-radius: 12px;
  background: transparent;
  cursor: pointer;
}

.smarti-scenario-choices button > span {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  color: var(--course-blue-deep);
  font-weight: 900;
  border: 1px solid currentColor;
  border-radius: 50%;
  background: var(--course-blue-soft);
}

.smarti-scenario-choices button:hover,
.smarti-scenario-choices button.is-selected { border-color: var(--course-blue); background: var(--course-blue-soft); }
.smarti-scenario-choices button.is-correct { border-color: var(--course-green); background: color-mix(in srgb, var(--course-green) 12%, transparent); }
.smarti-scenario-choices button.is-review { border-color: var(--course-amber); background: color-mix(in srgb, var(--course-amber) 10%, transparent); }
.smarti-scenario-choices button:focus-visible { outline: 3px solid #ffbf47; outline-offset: 2px; }

.smarti-scenario-feedback {
  min-height: 48px;
  margin: 0.85rem 0 0;
  padding: 0.75rem 0.85rem;
  color: var(--course-ink-soft);
  font-size: 0.8rem;
  line-height: 1.45;
  border: 1px solid var(--course-line);
  border-radius: 10px;
}

.smarti-scenario-feedback.is-correct { color: var(--course-green); border-color: color-mix(in srgb, var(--course-green) 58%, transparent); }
.smarti-scenario-feedback.is-review { color: var(--course-amber); border-color: color-mix(in srgb, var(--course-amber) 58%, transparent); }

.smarti-lesson-explainer .smarti-memory-rule {
  display: grid;
  width: min(760px, 100%);
  min-height: 64px;
  margin: 1rem auto 0;
  padding: 0.75rem 1rem;
  grid-template-columns: 34px auto minmax(0, 1fr);
  align-items: center;
  justify-content: initial;
  gap: 0.7rem;
  text-align: left;
  border: 1px solid var(--course-line-strong);
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-surface) 64%, transparent);
}

.smarti-lesson-explainer .smarti-memory-rule > span:first-child {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--course-green);
  border: 1px solid currentColor;
  border-radius: 50%;
}

.smarti-lesson-explainer .smarti-memory-rule strong {
  color: var(--course-green);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.smarti-lesson-explainer .smarti-memory-rule > span:last-child { color: var(--course-ink); font-weight: 720; line-height: 1.4; }

.lesson-source-links {
  width: min(760px, calc(100% - 2rem));
  margin: 0.9rem auto 0;
  color: var(--course-ink);
  border: 1px solid var(--course-line-strong);
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-surface) 72%, transparent);
  box-shadow: 0 12px 30px rgba(7, 19, 60, 0.08);
}

.lesson-source-links summary {
  display: flex;
  min-height: 48px;
  padding: 0.75rem 1rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--course-blue-deep);
  font-weight: 820;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
  list-style: none;
}

.lesson-source-links summary > span:first-child {
  font-size: clamp(0.75rem, 1vw, 0.82rem);
  line-height: 1.35;
}

.lesson-source-links summary::-webkit-details-marker { display: none; }
.lesson-source-links summary:hover { background: var(--course-blue-soft); }
.lesson-source-links summary:focus-visible { outline: 3px solid #ffbf47; outline-offset: 2px; }
.lesson-source-toggle { flex: 0 0 auto; font-size: 1.2rem; text-decoration: none; transition: transform 160ms ease; }
.lesson-source-links[open] .lesson-source-toggle { transform: rotate(45deg); }

.lesson-source-links-body {
  padding: 0.85rem 1rem 1rem;
  border-top: 1px solid var(--course-line);
}

.lesson-source-links-body > strong {
  display: block;
  margin-bottom: 0.55rem;
  color: var(--course-ink-soft);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.lesson-source-links-body ul {
  display: grid;
  margin: 0;
  padding: 0;
  gap: 0.55rem;
  list-style: none;
}

.lesson-source-links-body a {
  display: grid;
  padding: 0.65rem 0.75rem;
  gap: 0.18rem;
  color: var(--course-blue-deep);
  text-decoration: none;
  border: 1px solid var(--course-line);
  border-radius: 10px;
}

.lesson-source-links-body a:hover { border-color: var(--course-blue); background: var(--course-blue-soft); }
.lesson-source-links-body a:focus-visible { outline: 3px solid #ffbf47; outline-offset: 2px; }
.lesson-source-links-body a span { font-weight: 780; }
.lesson-source-links-body a small { color: var(--course-muted); line-height: 1.35; }

@media (max-width: 700px) {
  .course-view-lesson .course-runner-subbar {
    top: 62px;
    min-height: 84px;
    padding: 7px 10px;
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .course-view-lesson .course-runner-subbar .course-runner-progress:not([hidden]) {
    display: block;
    grid-column: 1;
    grid-row: 1;
  }
  .course-view-lesson .course-runner-subbar .course-runner-progress[hidden] { display: none; }
  .course-runner-context { display: none; }
  .lesson-stage-progress > span > button { min-height: 50px; padding-inline: 0.3rem; gap: 0.3rem; }
  .lesson-stage-progress b { font-size: 0.68rem; }
  .lesson-stage-icon,
  .lesson-stage-icon svg { width: 19px; height: 19px; }
  .lesson-item-dots { gap: 6px; }
  .lesson-source-links { width: min(100% - 20px, 760px); margin-top: 0.65rem; }
  .lesson-source-links summary { padding-inline: 0.8rem; font-size: 0.8rem; }
  .lesson-card--timed { width: min(100% - 0.75rem, 940px); }
  .fept-method { gap: 0.3rem; }
  .fept-method > span { min-height: 62px; padding: 0.55rem 0.2rem; }
  .fept-method b { font-size: 1.05rem; }
  .fept-method small { font-size: 0.6rem; }
  .timed-mastery-rules { grid-template-columns: 1fr; gap: 0.45rem; }
  .timed-mastery-rules > span { min-height: 66px; }
  .timed-mastery-toolbar { grid-template-columns: minmax(0, 1fr) 88px; gap: 0.6rem; }
  .timed-mastery-toolbar h1 { font-size: 1.25rem; }
  .timed-mastery-timer { min-width: 88px; min-height: 68px; padding-inline: 0.55rem; }
  .timed-mastery-timer strong { font-size: 1.25rem; }
  .timed-mastery-question,
  .timed-mastery-question-result { padding: 0.9rem; border-radius: 15px; }

  .course-view-lesson .course-status-pill,
  .course-view-orientation .course-status-pill,
  .course-view-checkpoint .course-status-pill {
    width: auto;
    flex: 0 0 auto;
  }

  .course-view-lesson .lesson-shell,
  .course-view-lesson .lesson-shell--visual {
    min-height: calc(100vh - 136px);
  }

  .smarti-teaching-grid {
    width: min(100% - 4px, 620px);
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }

  .smarti-teaching-card { padding: 0.8rem; }
  .smarti-explainer-modes { margin-bottom: 0.65rem; }
  .smarti-explainer-modes button { min-height: 44px; padding-inline: 0.55rem; font-size: 0.78rem; }
  .smarti-scenario-choices { grid-template-columns: 1fr; }
  .smarti-question-map { align-items: flex-start; flex-direction: column; gap: 0.2rem; }
  .smarti-mapped-scenario { padding: 0.9rem; border-radius: 14px; }
  .smarti-lesson-explainer .smarti-memory-rule { min-height: 58px; padding: 0.65rem 0.75rem; grid-template-columns: 30px minmax(0, 1fr); gap: 0.15rem 0.6rem; }
  .smarti-lesson-explainer .smarti-memory-rule > span:first-child { width: 30px; height: 30px; grid-row: 1 / span 2; }
  .smarti-lesson-explainer .smarti-memory-rule strong,
  .smarti-lesson-explainer .smarti-memory-rule > span:last-child { grid-column: 2; }
  .smarti-lesson-explainer .smarti-memory-rule > span:last-child { font-size: 0.76rem; }
  .smarti-value-map { margin-top: 0.2rem; }
  .smarti-memory-rule { margin-bottom: 0.5rem; }

  .lesson-shell--visual .lesson-action-layout { grid-template-columns: 1fr; }
  .lesson-shell--visual .lesson-action-note,
  .lesson-shell--visual .lesson-action-controls { grid-column: 1; }
  .lesson-shell--visual .lesson-action-note { display: none; }
}

/* Learn and Explain render one bounded lesson slide per page. */
.course-view-lesson .course-main:has(.lesson-shell--learn-slides),
.course-view-lesson .course-main:has(.lesson-shell--explain-slides) {
  width: 100%;
  min-width: 0;
  height: calc(100vh - 236px - env(safe-area-inset-bottom));
  height: calc(100svh - 236px - env(safe-area-inset-bottom));
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior-y: contain;
  scroll-padding-bottom: 1rem;
}

.course-view-lesson .lesson-shell--learn-slides,
.course-view-lesson .lesson-shell--explain-slides {
  width: 100%;
  min-width: 0;
  height: auto;
  min-height: 100%;
  padding: 0 0 1rem;
  overflow: visible;
  grid-template-columns: minmax(0, 1fr);
  background: var(--course-canvas);
}

.course-view-lesson .lesson-shell--learn-slides > .lesson-card--learn-slides,
.course-view-lesson .lesson-shell--explain-slides > .lesson-card--explain-slides {
  display: grid;
  width: min(820px, 100%);
  height: auto;
  min-height: 100%;
  margin: 0 auto;
  padding: clamp(0.75rem, 2.4vh, 1.35rem) clamp(1rem, 4vw, 2rem) 0;
  grid-template-rows: auto auto;
  gap: clamp(0.45rem, 1.4vh, 0.8rem);
  overflow: visible;
  animation: course-stage-enter 240ms ease-out both;
}

.course-view-lesson .lesson-card--learn-slides:has(> .learn-listen-controls) {
  grid-template-rows: max-content auto;
}

.learn-concept-heading {
  display: grid;
  width: 100%;
  min-width: 0;
  gap: 0.35rem;
}

.learn-concept-heading > p {
  margin: 0;
  color: var(--course-blue-deep);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.learn-concept-heading h1 {
  width: 100%;
  min-width: 0;
  margin: 0;
  color: var(--course-ink);
  font-size: clamp(1.55rem, 4.4vw, 2.65rem);
  font-weight: 880;
  line-height: 1.08;
  letter-spacing: -0.035em;
  text-wrap: balance;
  overflow-wrap: break-word;
  word-break: normal;
}

.learn-listen-controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  padding: 0.5rem clamp(0.75rem, 2vw, 1.5rem);
  color: var(--course-ink-soft);
}

.learn-listen-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-width: 104px;
  min-height: 44px;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--course-line-strong);
  border-radius: 999px;
  color: var(--course-ink);
  background: var(--course-surface);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 700;
  cursor: pointer;
}

.learn-listen-button svg { width: 18px; height: 18px; }
.learn-listen-button:hover:not(:disabled),
.learn-listen-button.is-listening { background: var(--course-blue-soft); border-color: var(--course-blue-deep); }
.learn-listen-button:focus-visible { outline: 3px solid var(--course-blue-deep); outline-offset: 3px; }
.learn-listen-button:disabled { cursor: default; color: var(--course-ink-soft); }
.learn-listen-status { flex: 1; min-width: 160px; font-size: 0.8rem; line-height: 1.4; }

.learn-concept-deck {
  display: grid;
  inline-size: 100%;
  max-inline-size: 100%;
  min-width: 0;
  min-height: auto;
  overflow: visible;
  touch-action: auto;
}

.learn-concept-deck::-webkit-scrollbar { display: none; }

.learn-concept-deck:focus-visible {
  outline: 3px solid #ffbf47;
  outline-offset: 3px;
  border-radius: 18px;
}

.learn-concept-slide {
  display: grid;
  inline-size: 100%;
  max-inline-size: 100%;
  min-width: 0;
  height: auto;
  padding: 0 3px;
}

.learn-concept-slide__panel {
  display: grid;
  width: min(720px, 100%);
  height: auto;
  min-height: auto;
  margin: 0 auto;
  padding: clamp(0.25rem, 1.5vh, 0.8rem) 0;
  align-content: start;
  gap: clamp(0.65rem, 1.8vh, 1rem);
  overflow: visible;
}

.course-learn-comparison {
  display: grid;
  width: min(720px, 100%);
  height: auto;
  min-height: auto;
  margin: 0 auto;
  padding: clamp(0.2rem, 1vh, 0.55rem) 0;
  grid-template-rows: auto auto auto auto;
  gap: clamp(0.55rem, 1.4vh, 0.8rem);
  overflow: visible;
}

.course-learn-key-rule,
.course-learn-memory-cue {
  display: grid;
  min-width: 0;
  padding: clamp(0.75rem, 2vw, 1rem);
  grid-template-columns: clamp(48px, 8vw, 62px) minmax(0, 1fr);
  align-items: center;
  gap: clamp(0.7rem, 2vw, 1rem);
  border: 1px solid color-mix(in srgb, var(--course-blue) 25%, var(--course-line));
  border-radius: 15px;
  background: color-mix(in srgb, var(--course-surface) 94%, var(--course-blue-soft));
}

.course-learn-key-rule .learn-slide-icon {
  width: clamp(48px, 8vw, 62px);
  height: clamp(48px, 8vw, 62px);
  place-self: center;
}

.course-learn-key-rule strong,
.course-learn-memory-cue strong,
.course-learn-comparison-side > span,
.course-learn-reveal > span:first-child {
  display: block;
  color: var(--course-blue-deep);
  font-size: 0.68rem;
  font-weight: 880;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.course-learn-key-rule p,
.course-learn-memory-cue p {
  margin: 0.28rem 0 0;
  color: var(--course-ink);
  font-size: clamp(0.84rem, 2vw, 1rem);
  line-height: 1.42;
  overflow-wrap: break-word;
  word-break: normal;
}

.course-learn-comparison-grid {
  display: grid;
  min-width: 0;
  min-height: 250px;
  grid-template-columns: minmax(0, 1fr) minmax(175px, 0.95fr) minmax(0, 1fr);
  align-items: stretch;
  overflow: visible;
  border: 1px solid color-mix(in srgb, var(--course-blue) 22%, var(--course-line));
  border-radius: 16px;
  background: var(--course-surface);
}

.course-learn-comparison-side,
.course-learn-reveal {
  display: grid;
  min-width: 0;
  min-height: 0;
  padding: clamp(0.75rem, 2vw, 1.15rem);
  align-content: start;
  justify-items: center;
  text-align: center;
  overflow: visible;
  overflow-wrap: break-word;
  word-break: normal;
}

.course-learn-comparison-side .learn-slide-icon {
  width: clamp(48px, 7vw, 62px);
  height: clamp(48px, 7vw, 62px);
  margin: 0 0 0.55rem;
}

.course-learn-comparison-side.is-concept { color: var(--course-blue-deep); }
.course-learn-comparison-side.is-trap { color: var(--course-green); }
.course-learn-comparison-side.is-trap > span { color: var(--course-green); }

.course-learn-comparison-side h2 {
  margin: 0.3rem 0 0;
  color: currentColor;
  font-size: clamp(0.9rem, 2.2vw, 1.15rem);
  line-height: 1.2;
}

.course-learn-comparison-side p {
  margin: 0.58rem 0 0;
  color: var(--course-ink-soft);
  font-size: clamp(0.72rem, 1.7vw, 0.86rem);
  line-height: 1.42;
}

.course-learn-reveal {
  position: relative;
  width: 100%;
  color: var(--course-ink);
  font: inherit;
  border: 0;
  border-right: 1px dashed color-mix(in srgb, var(--course-blue) 58%, var(--course-line));
  border-left: 1px dashed color-mix(in srgb, var(--course-blue) 58%, var(--course-line));
  border-radius: 0;
  background: color-mix(in srgb, var(--course-blue-soft) 74%, var(--course-surface));
  cursor: pointer;
}

.course-learn-reveal:hover:not(:disabled) {
  color: var(--course-blue-deep);
  box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--course-blue) 18%, transparent);
}

.course-learn-reveal:focus-visible {
  z-index: 1;
  outline: 3px solid #ffbf47;
  outline-offset: -4px;
}

.course-learn-reveal:disabled {
  color: var(--course-green);
  border-style: solid;
  border-color: color-mix(in srgb, var(--course-green) 34%, var(--course-line));
  background: color-mix(in srgb, var(--course-green) 8%, var(--course-surface));
  cursor: default;
  opacity: 1;
}

.course-learn-reveal > strong {
  max-width: 18ch;
  margin-top: 0.6rem;
  color: inherit;
  font-size: clamp(0.86rem, 2vw, 1.05rem);
  line-height: 1.3;
}

.course-learn-question,
.course-learn-reveal-icon {
  display: grid;
  width: clamp(48px, 7vw, 62px);
  height: clamp(48px, 7vw, 62px);
  place-items: center;
  color: var(--course-blue);
  border-radius: 50%;
  background: color-mix(in srgb, var(--course-blue) 10%, var(--course-surface));
}

.course-learn-question {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 780;
}

.course-learn-reveal-icon {
  width: 40px;
  height: 40px;
  margin-top: 0.85rem;
}

.course-learn-reveal-icon .learn-slide-icon {
  width: 40px;
  height: 40px;
  background: transparent;
}

.course-learn-reveal-icon.is-open,
.course-learn-reveal-icon.is-open .learn-slide-icon { color: var(--course-green); }

.course-learn-memory-cue {
  grid-template-columns: 36px minmax(0, 1fr);
  padding-block: 0.6rem;
  border-color: color-mix(in srgb, var(--course-green) 34%, var(--course-line));
  background: color-mix(in srgb, var(--course-green) 7%, var(--course-surface));
  animation: course-slide-reveal 220ms ease-out both;
}

.course-learn-memory-cue > span {
  display: grid;
  width: 34px;
  height: 34px;
  place-self: center;
  place-items: center;
  color: var(--course-green);
  border-radius: 50%;
  background: color-mix(in srgb, var(--course-green) 12%, transparent);
}

.course-learn-memory-cue strong { color: var(--course-green); }

.learn-resource-confirm .course-learn-memory-verse {
  display: grid;
  margin-top: 0.45rem;
  gap: 0.3rem;
  font-size: clamp(1.15rem, 2.5vw, 1.55rem);
  font-weight: 760;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.course-learn-memory-verse > span {
  display: block;
}

.course-learn-reveal-status {
  display: flex;
  min-height: 20px;
  margin: 0;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  color: var(--course-green);
  font-size: 0.76rem;
  font-weight: 820;
}

.course-learn-reveal-status > span {
  display: grid;
  width: 19px;
  height: 19px;
  place-items: center;
  border: 2px solid currentColor;
  border-radius: 50%;
}

@keyframes course-slide-reveal {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.learn-slide-card {
  display: grid;
  min-height: clamp(160px, 29vh, 260px);
  padding: clamp(1rem, 3vw, 1.5rem);
  grid-template-columns: clamp(54px, 10vw, 78px) minmax(0, 1fr);
  align-items: center;
  gap: clamp(0.9rem, 3vw, 1.35rem);
  border: 1px solid color-mix(in srgb, var(--course-blue) 25%, var(--course-line));
  border-radius: 18px;
  background: color-mix(in srgb, var(--course-surface) 92%, var(--course-blue-soft));
  box-shadow: 0 16px 40px rgba(26, 54, 108, 0.08);
}

.learn-slide-icon {
  display: grid;
  box-sizing: border-box;
  width: clamp(54px, 10vw, 76px);
  height: clamp(54px, 10vw, 76px);
  aspect-ratio: 1;
  place-items: center;
  line-height: 0;
  color: var(--course-blue);
  border-radius: 50%;
  background: color-mix(in srgb, var(--course-blue) 10%, transparent);
}

.learn-slide-icon svg {
  display: block;
  width: 58%;
  height: 58%;
  margin: 0;
}

.learn-slide-icon--rule svg,
.learn-slide-icon--explain svg,
.learn-slide-icon--trap svg { transform: translateY(-0.5px); }

.learn-slide-icon--memory svg { transform: translateY(0.5px); }

.learn-slide-icon--example,
.learn-slide-icon--resource {
  color: var(--course-green);
  background: color-mix(in srgb, var(--course-green) 11%, transparent);
}

.learn-slide-icon--trap {
  color: var(--course-amber);
  background: color-mix(in srgb, var(--course-amber) 12%, transparent);
}

.learn-slide-label {
  margin: 0 0 0.5rem;
  color: var(--course-blue-deep);
  font-size: 0.75rem;
  font-weight: 880;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.learn-concept-slide--example .learn-slide-label,
.learn-concept-slide--resource .learn-slide-label { color: var(--course-green); }
.learn-concept-slide--trap .learn-slide-label { color: var(--course-amber); }

.learn-slide-card h2 {
  margin: 0;
  color: var(--course-ink);
  font-size: clamp(1.05rem, 2.6vw, 1.45rem);
  font-weight: 720;
  line-height: 1.45;
  letter-spacing: -0.015em;
  text-wrap: pretty;
  overflow-wrap: break-word;
  word-break: normal;
}

.learn-memory-cue {
  display: grid;
  min-height: 72px;
  padding: 0.8rem 1rem;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: center;
  gap: 0.8rem;
  border: 1px solid color-mix(in srgb, var(--course-green) 34%, var(--course-line));
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-green) 7%, var(--course-surface));
}

.learn-memory-cue > span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--course-green);
  font-size: 1.2rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--course-green) 12%, transparent);
}

.learn-memory-cue strong {
  color: var(--course-green);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.learn-memory-cue p {
  margin: 0.18rem 0 0;
  color: var(--course-ink);
  font-size: 0.92rem;
  font-weight: 680;
  line-height: 1.4;
}

.learn-slide-ready {
  display: flex;
  margin: 0;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  color: var(--course-green);
  font-size: 0.86rem;
  font-weight: 820;
}

.learn-slide-ready > span {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border: 2px solid currentColor;
  border-radius: 50%;
}

.learn-slide-resources {
  display: grid;
  gap: 0.65rem;
}

.learn-slide-resources .lesson-source-links,
.learn-slide-resources .lesson-video-inline {
  width: 100%;
  margin: 0;
}

.learn-slide-resources .lesson-video-inline:not(.is-available) { display: none; }

.learn-visual-card {
  --visual-green: var(--course-green);
  --visual-blue: var(--course-blue);
  --visual-gold: #e1a824;
  --visual-ink: var(--course-ink);
  --visual-muted: var(--course-muted);
  display: grid;
  width: 100%;
  max-width: 720px;
  height: auto;
  min-height: auto;
  margin: 0 auto;
  padding: clamp(0.8rem, 2vw, 1.15rem);
  gap: clamp(0.55rem, 1.4vh, 0.85rem);
  grid-template-columns: minmax(0, 1fr);
  overflow: visible;
  border: 1px solid color-mix(in srgb, var(--course-blue) 25%, var(--course-line));
  border-radius: 18px;
  background: color-mix(in srgb, var(--course-surface) 96%, var(--course-blue-soft));
  box-shadow: 0 16px 40px rgba(26, 54, 108, 0.08);
}

.learn-visual-card--model,
.learn-visual-card--worked,
.learn-visual-card--misconception {
  grid-template-rows: auto auto auto;
}

.learn-visual-card.learn-visual-card--infographic-only {
  padding: 0;
  gap: 0;
  grid-template-rows: minmax(0, 1fr);
  border: 0;
  background: transparent;
  box-shadow: none;
}

.learn-visual-card--resource {
  grid-template-rows: auto auto auto auto auto auto;
}

.learn-visual-card__header {
  display: grid;
  grid-column: 1 / -1;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  grid-template-columns: clamp(46px, 8vw, 60px) minmax(0, 1fr);
  align-items: center;
  gap: clamp(0.65rem, 2vw, 0.95rem);
}

.learn-visual-card--resource > *,
.learn-resource-learning > *,
.learn-visual-model > *,
.learn-worked-layout > * {
  width: 100%;
  min-width: 0;
  max-width: 100%;
}

.learn-visual-card__header > div {
  width: auto;
  min-width: 0;
  max-width: none;
}

.learn-visual-card__header .learn-slide-icon {
  width: clamp(46px, 8vw, 60px);
  height: clamp(46px, 8vw, 60px);
}

.learn-visual-card__header p,
.learn-visual-card__header h1,
.learn-visual-card__header h2,
.learn-visual-card__header > div > span,
.learn-visual-card p,
.learn-visual-card figure { margin: 0; }

.learn-visual-card__header p {
  color: var(--course-blue-deep);
  font-size: clamp(0.62rem, 1.45vw, 0.74rem);
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.learn-visual-card__header h1,
.learn-visual-card__header h2 {
  margin-top: 0.12rem;
  color: var(--course-ink);
  font-size: clamp(1.02rem, 2.5vw, 1.38rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  overflow-wrap: break-word;
  word-break: normal;
}

.learn-visual-card__header > div > span {
  display: block;
  margin-top: 0.18rem;
  color: var(--course-muted);
  font-size: clamp(0.68rem, 1.5vw, 0.8rem);
  font-weight: 650;
  line-height: 1.32;
  overflow-wrap: break-word;
  word-break: normal;
}

.learn-visual-card__header.is-green p { color: var(--course-green); }
.learn-visual-card__header.is-amber p { color: var(--course-amber); }

.learn-visual-model,
.learn-worked-layout {
  display: grid;
  min-width: 0;
  min-height: auto;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  gap: clamp(0.6rem, 2vw, 1rem);
  align-items: stretch;
}

.learn-visual-model--infographic {
  grid-template-columns: minmax(0, 1fr);
  justify-items: center;
}

.learn-visual-model--infographic > .smarti-course-infographic {
  width: min(640px, 100%);
  margin: 0;
  border-color: color-mix(in srgb, var(--course-blue) 28%, var(--course-line));
  border-radius: 18px;
  background: var(--course-surface);
  box-shadow: 0 18px 44px rgba(26, 54, 108, 0.14);
}

.learn-visual-model--infographic .smarti-course-infographic figcaption {
  color: var(--course-muted);
  border-color: var(--course-line);
}

.learn-visual-model--infographic .smarti-course-infographic figcaption a {
  color: var(--course-blue-deep);
}

.learn-visual-model__art,
.learn-worked-art {
  display: grid;
  min-width: 0;
  min-height: 260px;
  grid-template-rows: minmax(220px, auto) auto;
  align-items: center;
  overflow: clip;
  border: 1px solid color-mix(in srgb, var(--course-blue) 22%, var(--course-line));
  border-radius: 15px;
  background: color-mix(in srgb, var(--course-blue-soft) 45%, var(--course-surface));
}

.learn-foundation-rule {
  width: 100%;
  min-height: 220px;
  align-content: center;
}

.learn-instruction-graphic {
  display: grid;
  min-width: 0;
  min-height: 220px;
  margin: 0;
  padding: clamp(0.65rem, 2vw, 1rem);
  align-content: center;
  gap: 0.45rem;
  list-style: none;
}

.learn-instruction-graphic > li:not(.learn-instruction-graphic__arrow) {
  display: grid;
  min-width: 0;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 0.55rem;
  align-items: center;
}

.learn-instruction-graphic > li > span {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  color: #fff;
  font-size: 0.72rem;
  font-weight: 900;
  border-radius: 50%;
  background: var(--course-blue);
}

.learn-instruction-graphic p {
  margin: 0;
  color: var(--course-ink);
  font-size: clamp(0.68rem, 1.45vw, 0.8rem);
  font-weight: 720;
  line-height: 1.36;
  overflow-wrap: break-word;
}

.learn-instruction-graphic__arrow {
  color: var(--course-green);
  font-size: 1rem;
  font-weight: 900;
  line-height: 1;
  text-align: center;
}

.learn-worked-example {
  display: grid;
  min-width: 0;
  min-height: 260px;
  padding: clamp(0.85rem, 2vw, 1.2rem);
  align-content: center;
  gap: 0.55rem;
  border: 1px solid color-mix(in srgb, var(--course-green) 24%, var(--course-line));
  border-radius: 15px;
  background: color-mix(in srgb, var(--course-green) 7%, var(--course-surface));
}

.learn-worked-example strong {
  color: var(--course-green);
  font-size: 0.68rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.learn-worked-example p {
  margin: 0;
  color: var(--course-ink);
  font-size: clamp(0.78rem, 1.75vw, 0.94rem);
  font-weight: 720;
  line-height: 1.48;
  overflow-wrap: break-word;
}

.learn-visual-model__art .visual-explainer-svg,
.learn-worked-art .visual-explainer-svg {
  width: 100%;
  height: 100%;
  min-height: 0;
  max-height: 100%;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.learn-visual-model__art .lesson-visual-illustration,
.learn-worked-art .lesson-visual-illustration,
.learn-resource-learning .lesson-visual-illustration {
  display: block;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  padding: clamp(0.35rem, 1vw, 0.65rem);
  object-fit: contain;
  object-position: center;
}

.learn-visual-card .visual-art-cutout { fill: var(--course-surface); }
.learn-visual-card .visual-art-line-light,
.learn-visual-card .visual-art-check,
.learn-visual-card .visual-art-currency { stroke: var(--course-surface); }

.learn-visual-model__art figcaption,
.learn-worked-art figcaption {
  padding: 0.4rem 0.55rem;
  color: var(--course-blue-deep);
  font-size: 0.62rem;
  font-weight: 820;
  line-height: 1.25;
  text-align: center;
  border-top: 1px solid color-mix(in srgb, var(--course-blue) 16%, var(--course-line));
}

.learn-visual-model__nodes,
.learn-worked-steps {
  display: grid;
  min-width: 0;
  min-height: auto;
  margin: 0;
  padding: 0;
  gap: clamp(0.35rem, 1vh, 0.55rem);
  list-style: none;
}

.learn-visual-model__nodes { grid-template-rows: repeat(3, auto); }
.learn-worked-steps { grid-template-rows: repeat(3, auto); }

.learn-visual-model__nodes li,
.learn-worked-steps li {
  display: grid;
  min-width: 0;
  min-height: auto;
  padding: clamp(0.4rem, 1.2vw, 0.62rem);
  grid-template-columns: 28px minmax(0, 1fr);
  align-items: center;
  gap: 0.5rem;
  overflow: visible;
  border: 1px solid color-mix(in srgb, var(--course-blue) 16%, var(--course-line));
  border-radius: 12px;
  background: var(--course-surface);
}

.learn-visual-model__nodes li > span,
.learn-worked-steps li > span {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  color: #fff;
  font-size: 0.72rem;
  font-weight: 900;
  border-radius: 50%;
  background: var(--course-blue);
}

.learn-worked-steps li > span { background: var(--course-green); }

.learn-visual-model__nodes strong,
.learn-worked-steps strong,
.learn-misconception-compare strong,
.learn-resource-confirm strong,
.learn-visual-takeaway strong {
  display: block;
  color: var(--course-blue-deep);
  font-size: clamp(0.58rem, 1.35vw, 0.7rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  line-height: 1.2;
  text-transform: uppercase;
}

.learn-visual-model__nodes p,
.learn-worked-steps p,
.learn-misconception-compare p,
.learn-resource-confirm p,
.learn-visual-takeaway p {
  margin-top: 0.16rem;
  color: var(--course-ink);
  font-size: clamp(0.66rem, 1.55vw, 0.81rem);
  font-weight: 640;
  line-height: 1.32;
  overflow-wrap: break-word;
  word-break: normal;
}

.learn-visual-takeaway,
.learn-resource-confirm {
  display: grid;
  min-width: 0;
  padding: clamp(0.5rem, 1.4vw, 0.7rem) clamp(0.65rem, 1.8vw, 0.9rem);
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 0.65rem;
  border: 1px solid color-mix(in srgb, var(--course-blue) 22%, var(--course-line));
  border-radius: 12px;
  background: color-mix(in srgb, var(--course-blue) 6%, var(--course-surface));
}

.learn-resource-learning {
  display: grid;
  min-width: 0;
  min-height: auto;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(0.55rem, 1.6vw, 0.8rem);
}

.learn-resource-learning figure {
  display: grid;
  min-width: 0;
  min-height: 260px;
  grid-template-rows: minmax(220px, auto) auto;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--course-green) 24%, var(--course-line));
  border-radius: 12px;
  background: color-mix(in srgb, var(--course-green) 6%, var(--course-surface));
}

.learn-resource-learning .visual-explainer-svg {
  width: 100%;
  height: 100%;
  min-height: 0;
  max-height: 100%;
  border: 0;
  border-radius: 0;
  background: transparent;
}

.learn-resource-learning figcaption {
  padding: 0.32rem;
  color: var(--course-green);
  font-size: 0.58rem;
  font-weight: 850;
  text-align: center;
  border-top: 1px solid color-mix(in srgb, var(--course-green) 18%, var(--course-line));
}

.learn-resource-learning ol {
  display: grid;
  min-width: 0;
  min-height: auto;
  margin: 0;
  padding: 0;
  grid-template-rows: repeat(3, auto);
  gap: 0.35rem;
  list-style: none;
}

.learn-resource-learning li {
  display: grid;
  min-width: 0;
  min-height: auto;
  padding: 0.36rem 0.46rem;
  grid-template-columns: 24px minmax(0, 1fr);
  align-items: center;
  gap: 0.42rem;
  overflow: visible;
  border: 1px solid color-mix(in srgb, var(--course-green) 18%, var(--course-line));
  border-radius: 10px;
  background: var(--course-surface);
}

.learn-resource-learning li > span {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  color: #fff;
  font-size: 0.62rem;
  font-weight: 900;
  border-radius: 50%;
  background: var(--course-green);
}

.learn-resource-learning strong {
  display: block;
  color: var(--course-green);
  font-size: clamp(0.54rem, 1.25vw, 0.66rem);
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.learn-resource-learning p {
  margin-top: 0.12rem;
  color: var(--course-ink);
  font-size: clamp(0.6rem, 1.38vw, 0.74rem);
  font-weight: 640;
  line-height: 1.25;
  overflow-wrap: break-word;
  word-break: normal;
}

.learn-visual-takeaway strong { min-width: max-content; }
.learn-visual-takeaway.is-green { border-color: color-mix(in srgb, var(--course-green) 30%, var(--course-line)); background: color-mix(in srgb, var(--course-green) 7%, var(--course-surface)); }
.learn-visual-takeaway.is-green strong { color: var(--course-green); }
.learn-visual-takeaway.is-amber { border-color: color-mix(in srgb, var(--course-amber) 30%, var(--course-line)); background: color-mix(in srgb, var(--course-amber) 7%, var(--course-surface)); }
.learn-visual-takeaway.is-amber strong { color: var(--course-amber); }

.learn-misconception-compare {
  display: grid;
  min-width: 0;
  min-height: 0;
  grid-template-columns: minmax(0, 1fr) 38px minmax(0, 1fr);
  align-items: stretch;
}

.learn-misconception-compare section {
  display: grid;
  min-width: 0;
  padding: clamp(0.7rem, 2vw, 1rem);
  grid-template-rows: auto auto;
  align-content: center;
  gap: 0.6rem;
  overflow: visible;
  border: 1px solid color-mix(in srgb, var(--course-amber) 28%, var(--course-line));
  border-radius: 15px;
  background: color-mix(in srgb, var(--course-amber) 7%, var(--course-surface));
}

.learn-misconception-compare section.is-rule {
  border-color: color-mix(in srgb, var(--course-green) 32%, var(--course-line));
  background: color-mix(in srgb, var(--course-green) 7%, var(--course-surface));
}

.learn-misconception-compare section > span,
.learn-resource-confirm > span {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: var(--course-amber);
  font-size: 1.35rem;
  font-weight: 900;
  border-radius: 50%;
  background: color-mix(in srgb, var(--course-amber) 14%, transparent);
}

.learn-misconception-compare .is-rule > span,
.learn-resource-confirm > span {
  color: var(--course-green);
  background: color-mix(in srgb, var(--course-green) 13%, transparent);
}

.learn-resource-confirm > .learn-slide-icon { place-self: center; }

.learn-misconception-compare .is-rule strong,
.learn-resource-confirm strong { color: var(--course-green); }

.learn-misconception-symbol {
  display: grid;
  place-items: center;
  color: var(--course-amber);
  font-size: 1.35rem;
  font-weight: 900;
}

.learn-resource-confirm {
  grid-template-columns: 36px minmax(0, 1fr);
  border-color: color-mix(in srgb, var(--course-green) 30%, var(--course-line));
  background: color-mix(in srgb, var(--course-green) 7%, var(--course-surface));
}

.learn-visual-card--resource .learn-slide-resources {
  width: 100%;
  min-width: 0;
  min-height: auto;
  align-content: start;
  overflow: visible;
}

.learn-visual-card--resource .lesson-source-links-body,
.learn-visual-card--resource .lesson-video-inline { font-size: 0.76rem; }

.learn-visual-art-fallback {
  display: grid;
  min-height: 120px;
  place-items: center;
}

.lesson-explain-page {
  display: grid;
  width: 100%;
  min-width: 0;
  min-height: auto;
  overflow: visible;
}

.lesson-explain-slide {
  display: grid;
  width: 100%;
  min-width: 0;
  height: auto;
  padding: clamp(0.25rem, 1.5vh, 0.8rem) 3px;
}

.lesson-explain-card {
  display: grid;
  width: min(720px, 100%);
  height: auto;
  min-height: 220px;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 1.5rem);
  grid-template-columns: clamp(54px, 10vw, 78px) minmax(0, 1fr);
  align-items: center;
  gap: clamp(0.9rem, 3vw, 1.35rem);
  overflow: visible;
  border: 1px solid color-mix(in srgb, var(--course-blue) 25%, var(--course-line));
  border-radius: 18px;
  background: color-mix(in srgb, var(--course-surface) 94%, var(--course-blue-soft));
  box-shadow: 0 16px 40px rgba(26, 54, 108, 0.08);
}

.lesson-explain-card > .learn-slide-icon {
  width: clamp(54px, 10vw, 76px);
  height: clamp(54px, 10vw, 76px);
}

.lesson-explain-card > div {
  min-width: 0;
  max-height: 100%;
}

.lesson-explain-label {
  margin: 0 0 0.5rem;
  color: var(--course-blue-deep);
  font-size: 0.75rem;
  font-weight: 880;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.lesson-explain-card h2 {
  margin: 0;
  color: var(--course-ink);
  font-size: clamp(1.05rem, 2.6vw, 1.45rem);
  font-weight: 720;
  line-height: 1.45;
  overflow-wrap: break-word;
  word-break: normal;
  text-wrap: pretty;
}

.lesson-explain-card > div > p:not(.lesson-explain-label) {
  margin: 0 0 0.75rem;
  color: var(--course-ink-soft);
  line-height: 1.45;
}

.lesson-explain-card .lesson-retrieval-label {
  margin-top: 0.65rem;
}

.lesson-explain-card .lesson-retrieval-label textarea {
  min-height: 104px;
  max-height: 150px;
  resize: vertical;
}

.lesson-explain-slide.is-rating .lesson-explain-card {
  border-color: color-mix(in srgb, var(--course-green) 32%, var(--course-line));
  background: color-mix(in srgb, var(--course-green) 7%, var(--course-surface));
}

.lesson-explain-slide.is-rating .lesson-recall-rating {
  margin: 0;
  padding: 0;
  border: 0;
}

.lesson-explain-slide.is-resource .lesson-explain-card {
  align-items: start;
}

.lesson-explain-resources,
.lesson-explain-resources .lesson-source-links {
  width: 100%;
  margin: 0;
}

.lesson-shell--learn-slides .lesson-action-layout,
.lesson-shell--explain-slides .lesson-action-layout {
  width: min(820px, 100%);
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.35fr);
}

.lesson-shell--learn-slides .lesson-action-controls .lesson-primary-action,
.lesson-shell--explain-slides .lesson-action-controls .lesson-primary-action {
  min-height: 58px;
  padding-right: 3.5rem;
  border-radius: 16px;
  font-size: 1rem;
}

.lesson-shell--learn-slides .lesson-previous-action[disabled],
.lesson-shell--explain-slides .lesson-previous-action[disabled] { display: none; }

.lesson-shell--learn-slides .lesson-primary-action::before,
.lesson-shell--explain-slides .lesson-primary-action::before {
  position: absolute;
  right: 1.4rem;
  width: 10px;
  height: 10px;
  content: "";
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  transform: rotate(45deg);
  pointer-events: none;
}

@media (max-width: 700px) {
  .course-view-lesson .course-main:has(.lesson-shell--learn-slides),
  .course-view-lesson .course-main:has(.lesson-shell--explain-slides) {
    height: calc(100vh - 243px - env(safe-area-inset-bottom));
    height: calc(100svh - 243px - env(safe-area-inset-bottom));
  }

  .course-view-lesson .lesson-shell--learn-slides,
  .course-view-lesson .lesson-shell--explain-slides {
    padding-bottom: 0.75rem;
  }

  .course-view-lesson .lesson-shell--learn-slides > .lesson-card--learn-slides,
  .course-view-lesson .lesson-shell--explain-slides > .lesson-card--explain-slides {
    width: 100%;
    padding: 0.65rem 0.75rem 0;
    gap: 0.35rem;
  }

  .learn-concept-heading { gap: 0.22rem; }
  .learn-concept-heading h1 { font-size: clamp(1.35rem, 6.2vw, 2rem); }
  .learn-concept-slide__panel { padding-block: 0.35rem; gap: 0.55rem; }
  .learn-slide-card {
    min-height: clamp(150px, 27vh, 220px);
    padding: 1rem;
    grid-template-columns: 58px minmax(0, 1fr);
    gap: 0.85rem;
    border-radius: 16px;
  }
  .learn-slide-icon { width: 58px; height: 58px; }
  .learn-slide-card h2 { font-size: clamp(0.98rem, 4.2vw, 1.22rem); line-height: 1.4; }
  .learn-memory-cue { min-height: 64px; padding: 0.65rem 0.75rem; }
  .learn-memory-cue p { font-size: 0.82rem; }
  .course-learn-comparison { grid-template-rows: auto auto auto auto; }
  .course-learn-key-rule { padding: 0.65rem 0.7rem; }
  .course-learn-comparison-grid { min-height: 285px; grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.08fr) minmax(0, 0.9fr); }
  .course-learn-comparison-side,
  .course-learn-reveal { padding: 0.65rem 0.48rem; }
  .course-learn-comparison-side .learn-slide-icon { width: 50px; height: 50px; }
  .course-learn-comparison-side h2 { font-size: clamp(0.78rem, 3.4vw, 0.95rem); }
  .course-learn-comparison-side p { font-size: clamp(0.64rem, 2.6vw, 0.76rem); line-height: 1.36; }
  .course-learn-comparison-side > span,
  .course-learn-reveal > span:first-child { font-size: 0.58rem; }
  .course-learn-reveal > strong { font-size: clamp(0.75rem, 3.2vw, 0.92rem); }
  .course-learn-question { width: 50px; height: 50px; }
  .course-learn-memory-cue { padding: 0.5rem 0.65rem; }
  .course-learn-memory-cue p { font-size: 0.74rem; }

  .learn-visual-card {
    padding: 0.7rem;
    gap: 0.45rem;
    border-radius: 16px;
  }
  .learn-visual-card__header {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 0.6rem;
  }
  .learn-visual-card__header .learn-slide-icon { width: 44px; height: 44px; }
  .learn-visual-card__header h1,
  .learn-visual-card__header h2 { font-size: clamp(0.94rem, 4vw, 1.12rem); }
  .learn-visual-card__header > div > span { font-size: clamp(0.62rem, 2.5vw, 0.72rem); }
  .learn-visual-model,
  .learn-worked-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.65rem;
  }
  .learn-visual-model--infographic > .smarti-course-infographic { border-radius: 13px; }
  .learn-visual-model__art,
  .learn-worked-art { min-height: 320px; }
  .learn-visual-model__art .lesson-visual-illustration,
  .learn-worked-art .lesson-visual-illustration { height: auto; max-height: 430px; }
  .learn-visual-model__art figcaption,
  .learn-worked-art figcaption { padding: 0.28rem 0.35rem; font-size: 0.56rem; }
  .learn-visual-model__nodes,
  .learn-worked-steps { gap: 0.3rem; }
  .learn-visual-model__nodes li,
  .learn-worked-steps li {
    padding: 0.34rem;
    grid-template-columns: 23px minmax(0, 1fr);
    gap: 0.35rem;
    border-radius: 9px;
  }
  .learn-visual-model__nodes li > span,
  .learn-worked-steps li > span { width: 23px; height: 23px; font-size: 0.62rem; }
  .learn-visual-model__nodes strong,
  .learn-worked-steps strong,
  .learn-misconception-compare strong,
  .learn-resource-confirm strong,
  .learn-visual-takeaway strong { font-size: clamp(0.53rem, 2.05vw, 0.63rem); }
  .learn-visual-model__nodes p,
  .learn-worked-steps p,
  .learn-misconception-compare p,
  .learn-resource-confirm p,
  .learn-visual-takeaway p { font-size: clamp(0.59rem, 2.25vw, 0.7rem); line-height: 1.25; }
  .learn-visual-takeaway,
  .learn-resource-confirm { padding: 0.42rem 0.5rem; gap: 0.45rem; }
  .learn-visual-takeaway { grid-template-columns: 1fr; gap: 0.1rem; }
  .learn-misconception-compare { grid-template-columns: minmax(0, 1fr) 28px minmax(0, 1fr); }
  .learn-misconception-compare section { padding: 0.55rem; gap: 0.4rem; }
  .learn-misconception-compare section > span,
  .learn-resource-confirm > span { width: 30px; height: 30px; font-size: 1rem; }
  .learn-misconception-symbol { font-size: 1rem; }
  .learn-visual-card--resource .lesson-source-links,
  .learn-visual-card--resource .lesson-video-inline { font-size: 0.7rem; }
  .learn-resource-learning { grid-template-columns: minmax(0, 1fr); gap: 0.65rem; }
  .learn-resource-learning figure { min-height: 320px; }
  .learn-resource-learning .lesson-visual-illustration { height: auto; max-height: 430px; }
  .learn-resource-learning ol { gap: 0.25rem; }
  .learn-resource-learning li { padding: 0.28rem 0.32rem; grid-template-columns: 21px minmax(0, 1fr); gap: 0.3rem; }
  .learn-resource-learning li > span { width: 21px; height: 21px; font-size: 0.56rem; }
  .learn-resource-learning strong { font-size: clamp(0.5rem, 1.9vw, 0.58rem); }
  .learn-resource-learning p { font-size: clamp(0.55rem, 2vw, 0.64rem); }

  .lesson-explain-slide { padding-block: 0.35rem; }
  .lesson-explain-card { padding: 1rem; grid-template-columns: 58px minmax(0, 1fr); gap: 0.85rem; border-radius: 16px; }
  .lesson-explain-card > .learn-slide-icon { width: 58px; height: 58px; }
  .lesson-explain-card h2 { font-size: clamp(0.98rem, 4.2vw, 1.22rem); line-height: 1.4; }
  .lesson-explain-card .lesson-retrieval-label textarea { min-height: 96px; max-height: 120px; }

  .lesson-shell--learn-slides .lesson-action-layout,
  .lesson-shell--explain-slides .lesson-action-layout { grid-template-columns: 1fr; }
  .lesson-shell--learn-slides .lesson-action-note,
  .lesson-shell--explain-slides .lesson-action-note { display: none; }
  .lesson-shell--learn-slides .lesson-action-controls,
  .lesson-shell--explain-slides .lesson-action-controls {
    width: min(100%, 620px);
    margin: 0 auto;
  }
  .lesson-shell--learn-slides .lesson-action-controls .lesson-previous-action,
  .lesson-shell--explain-slides .lesson-action-controls .lesson-previous-action {
    flex: 0 1 34%;
    min-height: 58px;
    border-radius: 16px;
  }
  .lesson-shell--learn-slides .lesson-action-controls .lesson-primary-action,
  .lesson-shell--explain-slides .lesson-action-controls .lesson-primary-action { flex: 1 1 66%; }
}

@media (max-height: 700px) {
  .course-view-lesson .lesson-shell--learn-slides > .lesson-card--learn-slides,
  .course-view-lesson .lesson-shell--explain-slides > .lesson-card--explain-slides { padding-top: 0.45rem; }
  .learn-concept-heading > p { display: none; }
  .learn-concept-heading h1 { font-size: clamp(1.25rem, 4.8vw, 1.75rem); }
  .learn-slide-card,
  .lesson-explain-card { min-height: 132px; }
  .learn-concept-slide__panel { align-content: start; }
  .learn-visual-card { padding: 0.55rem; gap: 0.35rem; }
  .learn-visual-card__header .learn-slide-icon { width: 38px; height: 38px; }
  .learn-visual-card__header { grid-template-columns: 38px minmax(0, 1fr); }
}

@keyframes course-node-glow {
  0%, 100% { filter: drop-shadow(0 16px 20px rgba(0, 0, 0, 0.34)) drop-shadow(0 0 0 rgba(52, 119, 255, 0)); }
  50% { filter: drop-shadow(0 16px 20px rgba(0, 0, 0, 0.34)) drop-shadow(0 0 12px rgba(52, 119, 255, 0.5)); }
}

@media (prefers-reduced-motion: reduce) {
  .course-path-node.is-current .course-node-icon,
  .lesson-card--visual,
  .lesson-card--learn-slides,
  .lesson-card--explain-slides,
  .course-learn-memory-cue,
  .smarti-value-feedback { animation: none; }
  .course-node-card,
  .course-header-menu,
  .course-theme-thumb,
  .learn-concept-deck { scroll-behavior: auto; }
}

@media (forced-colors: active) {
  .course-path-connector path { stroke: CanvasText; }
  .course-node-icon,
  .lesson-stage-art,
  .smarti-node-art {
    background-image: none;
    border: 2px solid CanvasText;
    border-radius: 50%;
    filter: none;
  }
  .course-path-node.is-current .course-node-card,
  .smarti-value-choices button.is-selected { border: 3px solid Highlight; }
}

/* Finance course catalog */
.course-catalog-page .course-app-shell {
  display: flex;
  min-height: 100vh;
  flex-direction: column;
}

.course-catalog-header {
  grid-template-columns: auto minmax(0, 1fr) auto;
}

.course-catalog-header .course-primary-nav {
  justify-self: start;
}

.course-catalog-main {
  width: min(1160px, calc(100% - 2rem));
  min-height: 0;
  margin: 0 auto;
  padding: clamp(3rem, 7vw, 6.5rem) 0 clamp(4rem, 9vw, 7rem);
  flex: 1;
}

.course-catalog-intro {
  margin: 0 0 clamp(2rem, 4vw, 3rem);
}

.course-catalog-intro h1 {
  max-width: 18ch;
  margin: 0;
  color: var(--course-ink);
  font-size: clamp(2.35rem, 5vw, 4.1rem);
  font-weight: 860;
  letter-spacing: -0.055em;
  line-height: 1;
}

.course-catalog-intro p {
  max-width: 54ch;
  margin: 1rem 0 0;
  color: var(--course-ink-soft);
  font-size: clamp(1rem, 1.7vw, 1.25rem);
  line-height: 1.55;
}

.course-entry-summary-card {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 360px;
  padding: clamp(1.5rem, 4vw, 3.75rem);
  grid-template-columns: minmax(0, 1fr) minmax(410px, 1fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 4.5rem);
  border: 1px solid var(--course-line);
  border-radius: 28px;
  background: var(--course-surface);
  box-shadow: var(--course-shadow);
}

.course-entry-summary-card::before,
.course-entry-summary-card::after {
  position: absolute;
  z-index: -1;
  inset: 10px -10px -10px 10px;
  content: "";
  pointer-events: none;
  border: 1px solid var(--course-line);
  border-radius: inherit;
  background: var(--course-entry-layer);
}

.course-entry-summary-card::after {
  z-index: -2;
  inset: 20px -20px -20px 20px;
  opacity: 0.58;
}

.course-catalog-summary {
  min-width: 0;
}

.course-catalog-summary .course-kicker {
  margin-bottom: 1.2rem;
  font-size: 0.82rem;
}

.course-catalog-summary .course-exam-entry-actions {
  display: grid;
  margin: 0;
  gap: 1rem;
}

.course-catalog-summary .course-primary-action {
  width: 100%;
  min-height: 68px;
  font-size: 1.08rem;
}

.course-catalog-summary .course-exam-entry-actions > span {
  line-height: 1.5;
}

.course-catalog-choice {
  min-width: 0;
  padding-left: clamp(2rem, 4vw, 3.5rem);
  border-left: 1px solid var(--course-line);
}

.course-catalog-choice > h2 {
  margin: 0 0 1.1rem;
  color: var(--course-ink);
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  font-weight: 820;
  letter-spacing: -0.025em;
}

.course-catalog-options {
  gap: 0.9rem;
}

.course-catalog-options .finance-course-option {
  min-height: 190px;
  padding: 1.2rem;
  color: var(--course-ink);
  font: inherit;
  border-color: var(--course-line-strong);
  background: var(--course-surface);
  cursor: pointer;
}

.course-catalog-options .finance-course-option:hover {
  color: var(--course-ink);
  border-color: var(--course-blue);
  background: var(--course-blue-soft);
}

.course-catalog-options .finance-course-option.is-selected {
  border-color: var(--course-blue);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--course-blue) 24%, transparent),
    0 18px 38px rgba(36, 89, 217, 0.14);
}

.course-catalog-options .finance-course-option strong {
  color: var(--course-ink);
}

.course-catalog-options .finance-course-icon {
  width: 72px;
}

.course-option-selection {
  position: absolute;
  top: 0.9rem;
  right: 0.9rem;
  width: 26px;
  height: 26px;
  border: 3px solid var(--course-line-strong);
  border-radius: 50%;
  background: var(--course-surface);
}

.finance-course-option.is-selected .course-option-selection {
  border-color: var(--course-blue);
  box-shadow: inset 0 0 0 5px var(--course-surface);
  background: var(--course-blue);
}

.course-catalog-footer {
  justify-content: center;
  text-align: center;
}

@media (max-width: 860px) {
  .course-entry-summary-card {
    grid-template-columns: minmax(0, 1fr);
  }

  .course-catalog-choice {
    padding-top: 2rem;
    padding-left: 0;
    border-top: 1px solid var(--course-line);
    border-left: 0;
  }
}

@media (max-width: 640px) {
  .course-catalog-header {
    min-height: 64px;
    padding-inline: 1rem;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.8rem;
  }

  .course-catalog-header .course-brand {
    display: inline-flex;
    grid-column: 1;
    grid-row: 1;
    font-size: 1rem;
  }

  .course-catalog-header .course-brand span {
    display: inline;
  }

  .course-catalog-header .course-primary-nav {
    display: none;
  }

  .course-catalog-header .course-primary-nav a:first-child {
    display: inline-flex;
  }

  .course-catalog-header .course-primary-nav a {
    font-size: 0.86rem;
  }

  .course-catalog-main {
    width: min(100% - 1.5rem, 1160px);
    padding-top: 2.5rem;
  }

  .course-catalog-intro h1 {
    font-size: clamp(2.25rem, 12vw, 3.25rem);
  }

  .course-entry-summary-card {
    min-height: 0;
    padding: 1.25rem;
    gap: 2rem;
    border-radius: 20px;
  }

  .course-entry-summary-card::before {
    inset: 8px 0 -8px 8px;
  }

  .course-entry-summary-card::after {
    inset: 16px 0 -16px 16px;
  }

  .course-catalog-options .finance-course-option {
    min-height: 150px;
    padding: 0.9rem;
  }

  .course-catalog-options .finance-course-icon {
    width: 56px;
  }

  .course-option-selection {
    top: 0.65rem;
    right: 0.65rem;
    width: 22px;
    height: 22px;
  }
}

@media (forced-colors: active) {
  .course-entry-summary-card,
  .course-catalog-options .finance-course-option,
  .course-option-selection {
    border-color: CanvasText;
  }

  .course-catalog-options .finance-course-option.is-selected {
    border: 3px solid Highlight;
  }
}

/* Finance course product carousel */
.course-catalog-page {
  --course-catalog-max: 1160px;
  --course-catalog-gutter: max(1rem, calc((100vw - var(--course-catalog-max)) / 2));
  --course-catalog-slide: min(1010px, calc(100vw - 5rem));
  overflow-x: hidden;
}

.course-catalog-page .course-catalog-main {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: clamp(2.5rem, 4vw, 4rem) 0 clamp(3rem, 7vw, 5.5rem);
  overflow: hidden;
}

.course-catalog-page .course-catalog-intro {
  width: min(var(--course-catalog-max), calc(100% - 2rem));
  margin: 0 auto clamp(1.25rem, 2vw, 1.75rem);
}

.course-catalog-gallery {
  position: relative;
  width: 100%;
}

.course-carousel-viewport {
  width: 100%;
  padding: 0 var(--course-catalog-gutter) 1.8rem;
  overflow-x: auto;
  overflow-y: visible;
  scroll-behavior: smooth;
  scroll-padding-inline: var(--course-catalog-gutter);
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.course-carousel-viewport::-webkit-scrollbar,
.course-carousel-wheel::-webkit-scrollbar {
  display: none;
}

.course-carousel-viewport:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--course-blue) 72%, transparent);
  outline-offset: -3px;
}

.course-carousel-track {
  display: flex;
  width: max-content;
  gap: clamp(0.85rem, 2vw, 1.5rem);
}

.course-catalog-gallery .course-product-view {
  position: relative;
  isolation: isolate;
  display: grid;
  width: var(--course-catalog-slide);
  min-height: 400px;
  padding: clamp(1.4rem, 3vw, 2.75rem);
  flex: 0 0 var(--course-catalog-slide);
  grid-template-columns: minmax(0, 1.18fr) minmax(300px, 0.82fr);
  align-items: center;
  gap: clamp(1.5rem, 4vw, 3.75rem);
  overflow: hidden;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  border: 1px solid color-mix(in srgb, var(--course-line-strong) 86%, transparent);
  border-radius: 30px;
  background:
    radial-gradient(circle at 22% 38%, rgba(73, 133, 255, 0.14), transparent 38%),
    linear-gradient(138deg, color-mix(in srgb, var(--course-surface) 95%, #e8f0ff) 0%, var(--course-surface) 62%);
  box-shadow: 0 24px 64px rgba(25, 45, 84, 0.12);
  transition: border-color 180ms ease, box-shadow 180ms ease, opacity 180ms ease;
}

.course-catalog-gallery .course-product-view::before {
  position: absolute;
  z-index: -1;
  inset: auto -7rem -10rem auto;
  width: 25rem;
  height: 25rem;
  content: "";
  border-radius: 50%;
  background: color-mix(in srgb, var(--course-blue) 8%, transparent);
}

.course-catalog-gallery .course-product-view::after {
  display: none;
}

.course-catalog-gallery .course-product-view:not(.is-selected) {
  opacity: 0.76;
}

.course-catalog-gallery .course-product-view.is-selected {
  border-color: color-mix(in srgb, var(--course-blue) 42%, var(--course-line));
  box-shadow: 0 28px 72px rgba(25, 45, 84, 0.16);
}

.course-product-art-frame {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 290px;
  place-items: center;
}

.course-product-art-frame::after {
  position: absolute;
  z-index: -1;
  bottom: 6%;
  width: 72%;
  height: 15%;
  content: "";
  border-radius: 50%;
  background: rgba(20, 36, 68, 0.16);
  filter: blur(18px);
  transform: perspective(400px) rotateX(62deg);
}

.course-product-art {
  display: block;
  width: min(100%, 560px);
  height: 305px;
  object-fit: contain;
  filter: drop-shadow(0 22px 24px rgba(20, 42, 82, 0.16));
}

.course-catalog-gallery img[src$="series7-course-hub.png"] {
  mix-blend-mode: multiply;
}

[data-theme="dark"] .course-catalog-gallery img[src$="series7-course-hub.png"] {
  mix-blend-mode: normal;
}

.course-product-content {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.course-product-content h2 {
  margin: 0;
  color: var(--course-ink);
  font-size: clamp(2.1rem, 4vw, 3.65rem);
  font-weight: 880;
  letter-spacing: -0.052em;
  line-height: 0.98;
}

.course-product-content > p {
  max-width: 30ch;
  margin: 1rem 0 0;
  color: var(--course-ink-soft);
  font-size: clamp(1.02rem, 1.6vw, 1.22rem);
  line-height: 1.55;
}

.course-product-status {
  display: block;
  min-height: 3em;
  margin: 1.25rem 0 1.1rem;
  color: var(--course-ink-soft);
  font-size: 0.9rem;
  line-height: 1.5;
}

.course-product-view .course-primary-action {
  width: min(100%, 20rem);
  min-height: 62px;
  border-radius: 999px;
  font-size: 1rem;
}

.course-product-view[data-course-catalog-slide="series-7"] .course-primary-action {
  border-color: #1d875b;
  background: #1d875b;
  box-shadow: 0 12px 24px rgba(29, 135, 91, 0.22);
}

.course-carousel-arrow,
.course-carousel-wheel-arrow {
  display: grid;
  place-items: center;
  color: var(--course-ink);
  border: 1px solid var(--course-line-strong);
  border-radius: 50%;
  background: color-mix(in srgb, var(--course-surface) 94%, transparent);
  box-shadow: 0 10px 26px rgba(25, 45, 84, 0.15);
  cursor: pointer;
  transition: transform 160ms ease, opacity 160ms ease, border-color 160ms ease;
}

.course-carousel-arrow {
  position: absolute;
  z-index: 5;
  top: 190px;
  width: 52px;
  height: 52px;
}

.course-carousel-arrow.is-previous {
  left: max(0.7rem, calc(var(--course-catalog-gutter) - 26px));
}

.course-carousel-arrow.is-next {
  right: max(0.7rem, calc(var(--course-catalog-gutter) - 26px));
}

.course-carousel-arrow svg,
.course-carousel-wheel-arrow svg {
  width: 23px;
  height: 23px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2.25;
}

.course-carousel-arrow:hover:not(:disabled),
.course-carousel-wheel-arrow:hover:not(:disabled) {
  border-color: var(--course-blue);
  transform: translateY(-2px);
}

.course-carousel-arrow:focus-visible,
.course-carousel-wheel-arrow:focus-visible,
.course-carousel-wheel-item:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--course-blue) 65%, transparent);
  outline-offset: 3px;
}

.course-carousel-arrow:disabled,
.course-carousel-wheel-arrow:disabled {
  opacity: 0.3;
  cursor: default;
  box-shadow: none;
}

.course-carousel-wheel-shell {
  display: grid;
  width: min(760px, calc(100% - 2rem));
  margin: 0 auto;
  grid-template-columns: 38px minmax(0, 1fr) 38px;
  align-items: center;
  gap: 0.8rem;
}

.course-carousel-wheel {
  display: flex;
  min-width: 0;
  padding: 0.75rem max(0.75rem, calc((100% - 200px) / 2));
  align-items: end;
  gap: 0.7rem;
  overflow-x: auto;
  scroll-behavior: smooth;
  scroll-padding-inline: 1rem;
  scroll-snap-type: x proximity;
  scrollbar-width: none;
}

.course-carousel-wheel-arrow {
  width: 38px;
  height: 38px;
  padding: 0;
  box-shadow: 0 7px 18px rgba(25, 45, 84, 0.11);
}

.course-carousel-wheel-arrow svg {
  width: 18px;
  height: 18px;
}

.course-carousel-wheel-item {
  display: grid;
  width: 92px;
  min-width: 92px;
  padding: 0.5rem 0.45rem 0.55rem;
  scroll-snap-align: center;
  place-items: center;
  gap: 0.35rem;
  color: var(--course-ink-soft);
  font: inherit;
  font-size: 0.76rem;
  font-weight: 760;
  border: 1px solid transparent;
  border-radius: 18px;
  background: transparent;
  cursor: pointer;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.course-carousel-wheel-art {
  display: grid;
  width: 74px;
  height: 62px;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--course-line);
  border-radius: 14px;
  background: color-mix(in srgb, var(--course-surface) 88%, var(--course-blue-soft));
  box-shadow: 0 8px 18px rgba(25, 45, 84, 0.09);
}

.course-carousel-wheel-art img {
  display: block;
  width: 68px;
  height: 56px;
  object-fit: contain;
}

.course-carousel-wheel-item:hover,
.course-carousel-wheel-item.is-selected {
  color: var(--course-ink);
  border-color: color-mix(in srgb, var(--course-blue) 48%, var(--course-line));
  background: color-mix(in srgb, var(--course-surface) 88%, var(--course-blue-soft));
}

.course-carousel-wheel-item.is-selected {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 10px 24px rgba(36, 89, 217, 0.12);
}

@media (max-width: 860px) {
  .course-catalog-page {
    --course-catalog-slide: min(760px, calc(100vw - 3.75rem));
  }

  .course-catalog-gallery .course-product-view {
    min-height: 410px;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 0.82fr);
  }

  .course-product-art {
    height: 285px;
  }

  .course-product-art-frame {
    min-height: 280px;
  }
}

@media (max-width: 640px) {
  .course-catalog-page {
    --course-catalog-gutter: 0.75rem;
    --course-catalog-slide: calc(100vw - 3.25rem);
  }

  .course-catalog-page .course-catalog-main {
    width: 100%;
    padding-top: 2.5rem;
  }

  .course-catalog-page .course-catalog-intro {
    width: calc(100% - 1.5rem);
    margin-bottom: 1.5rem;
  }

  .course-catalog-intro h1 {
    max-width: 11ch;
    font-size: clamp(2.3rem, 11vw, 3.1rem);
  }

  .course-carousel-viewport {
    padding-bottom: 1.25rem;
  }

  .course-catalog-gallery .course-product-view {
    min-height: 570px;
    padding: 1.15rem 1.15rem 1.4rem;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: 245px minmax(0, 1fr);
    align-items: start;
    gap: 0.8rem;
    border-radius: 22px;
  }

  .course-product-art-frame {
    min-height: 235px;
  }

  .course-product-art {
    height: 235px;
  }

  .course-product-content h2 {
    font-size: clamp(2rem, 10vw, 2.75rem);
  }

  .course-product-content > p {
    margin-top: 0.7rem;
    font-size: 0.98rem;
  }

  .course-product-status {
    min-height: 2.8em;
    margin: 0.9rem 0 0.85rem;
    font-size: 0.82rem;
  }

  .course-product-view .course-primary-action {
    min-height: 56px;
  }

  .course-carousel-arrow {
    top: 185px;
    width: 42px;
    height: 42px;
  }

  .course-carousel-arrow.is-previous {
    left: 0.2rem;
  }

  .course-carousel-arrow.is-next {
    right: 0.2rem;
  }

  .course-carousel-wheel-shell {
    width: calc(100% - 1rem);
    grid-template-columns: 34px minmax(0, 1fr) 34px;
    gap: 0.35rem;
  }

  .course-carousel-wheel {
    padding-inline: max(0.4rem, calc((100% - 156px) / 2));
    gap: 0.45rem;
  }

  .course-carousel-wheel-arrow {
    width: 34px;
    height: 34px;
  }

  .course-carousel-wheel-item {
    width: 76px;
    min-width: 76px;
    border-radius: 14px;
  }

  .course-carousel-wheel-art {
    width: 62px;
    height: 52px;
    border-radius: 11px;
  }

  .course-carousel-wheel-art img {
    width: 58px;
    height: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .course-carousel-viewport,
  .course-carousel-wheel {
    scroll-behavior: auto;
  }

  .course-catalog-gallery .course-product-view,
  .course-carousel-arrow,
  .course-carousel-wheel-arrow,
  .course-carousel-wheel-item {
    transition: none;
  }
}

@media (forced-colors: active) {
  .course-catalog-gallery .course-product-view,
  .course-carousel-arrow,
  .course-carousel-wheel-arrow,
  .course-carousel-wheel-item,
  .course-carousel-wheel-art {
    border-color: CanvasText;
  }

  .course-carousel-wheel-item.is-selected,
  .course-catalog-gallery .course-product-view.is-selected {
    border: 3px solid Highlight;
  }
}

/* Keep the lesson runner flush to the viewport now that lesson pages omit the app header. */
.course-view-lesson .course-runner-subbar {
  top: 0;
  grid-template-columns: minmax(44px, 1fr) minmax(300px, 720px) minmax(44px, 1fr);
}

.course-view-lesson .course-runner-subbar .course-lesson-exit {
  grid-column: 1;
  justify-self: start;
}

.course-view-lesson .course-runner-subbar .course-runner-progress {
  grid-column: 2;
}

.course-view-lesson .course-runner-subbar > .course-menu-toggle {
  grid-column: 3;
  grid-row: 1;
  justify-self: end;
  height: 44px;
  color: var(--course-ink);
  border: 1px solid var(--course-line);
  background: var(--course-surface);
}

@media (max-width: 700px) {
  .course-view-lesson .course-runner-subbar {
    top: 0;
    min-height: 84px;
    padding: 7px 10px;
    grid-template-columns: 44px minmax(0, 1fr) 44px;
    gap: 8px;
  }

  .course-view-lesson .course-runner-subbar .course-runner-progress:not([hidden]) {
    display: block;
    grid-column: 2;
    grid-row: 1;
  }

  .course-view-lesson .lesson-shell,
  .course-view-lesson .lesson-shell--visual {
    min-height: calc(100vh - 84px);
  }
}

@media (max-width: 360px) {
  .course-view-lesson .course-runner-subbar {
    min-height: 118px;
    row-gap: 0;
  }

  .course-view-lesson .course-runner-subbar .course-lesson-exit { grid-row: 1; }

  .course-view-lesson .course-runner-subbar .course-runner-progress:not([hidden]) {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .course-view-lesson .lesson-shell,
  .course-view-lesson .lesson-shell--visual {
    min-height: calc(100vh - 118px);
  }
}

/* SIE Learn is one reading surface; assessment stages keep their focused layout. */
.course-view-lesson .course-main:has(.lesson-shell--learn-reader) {
  width: 100%;
  height: calc(100svh - 88px);
  min-height: 0;
  padding: 0;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-padding-top: 2rem;
}
.course-view-lesson .lesson-shell--learn-reader {
  display: block;
  min-height: 0;
  padding: 2rem 1.5rem 4rem;
  background: var(--course-canvas);
}
.learn-reader { width: min(1120px, 100%); margin: 0 auto; }
.learn-reader-heading, .learn-reader-video { width: min(760px, 100%); margin: 0 auto 1.5rem; }
.learn-reader-heading > p { margin: 0 0 0.6rem; color: var(--course-muted); font-size: 0.875rem; font-weight: 700; }
.learn-reader-heading h1 { margin: 0; color: var(--course-ink); font-size: clamp(1.6rem, 3vw, 2.25rem); line-height: 1.2; letter-spacing: -0.025em; }
.learn-reader-video-pending { color: var(--course-muted); line-height: 1.65; }
.learn-reader-video-pin { aspect-ratio: 16 / 9; }
.learn-reader-video .course-video-player { height: 100%; }
.learn-reader-video .course-video-load-button { position: relative; }
.learn-reader-video .course-video-load-button > span:last-child { position: absolute; left: 0; right: 0; bottom: 0; padding: 0.6rem 1rem; color: white; background: #07101c; }
.learn-reader-video .course-video-load-button small { display: none; }
.learn-reader-video .course-video-load-button strong { font-size: 0.85rem; }
.learn-reader-video .course-video-poster { height: 100%; }
.learn-reader-video .course-video-poster img { height: 100%; object-fit: cover; }
.learn-reader-video-dismiss { display: none; }
.learn-reader-video.is-pinned .course-video-player,
.learn-reader-video.is-pinned .learn-reader-video-dismiss {
  position: fixed;
  z-index: 50;
  right: max(24px, calc((100vw - 1120px) / 2));
  width: 320px;
}
.learn-reader-video.is-pinned .course-video-player { top: 112px; height: 200px; box-shadow: 0 10px 30px #0004; }
.learn-reader-video.is-pinned .course-video-iframe { height: 100%; }
.learn-reader-video.is-pinned .learn-reader-video-dismiss {
  display: block;
  top: 316px;
  min-height: 44px;
  border: 1px solid var(--course-line);
  border-radius: 8px;
  color: var(--course-ink);
  background: var(--course-surface);
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
}
.learn-reader-body { max-width: 720px; }
.learn-reader-introduction { margin: 2.5rem 0 0; color: var(--course-muted); font-size: 1.0625rem; line-height: 1.75; }
.learn-reader-section { position: relative; padding-top: 2.5rem; scroll-margin-top: 1.5rem; }
.learn-reader .learn-concept-slide { padding: 0; }
.learn-reader .learn-visual-card { display: block; padding: 0; border: 0; border-radius: 0; background: transparent; box-shadow: none; }
.learn-reader .learn-visual-card__header { display: block; margin-bottom: 1.5rem; }
.learn-reader .learn-visual-card__header .learn-slide-icon,
.learn-reader .learn-visual-card__header > div > p,
.learn-reader .learn-slide-ready { display: none; }
.learn-reader .learn-visual-card__header h2 { font-size: 1.5rem; line-height: 1.35; }
.learn-reader .learn-chapter-section { display: block; margin-top: 2rem; padding-top: 0; border-top: 0; }
.learn-reader .learn-chapter-section h2, .learn-reader .learn-chapter-section h3 { margin: 0 0 1rem; color: var(--course-ink); font-size: 1.15rem; line-height: 1.4; }
.learn-reader .learn-script-introduction { margin: 0 0 1rem; font-size: 1.0625rem; line-height: 1.8; }
.learn-reader .learn-script-points { margin-block: 1.25rem; gap: 1.25rem; }
.learn-reader .learn-script-points > div { padding: 0; border: 0; background: transparent; }
.learn-reader .learn-script-points dd { font-size: 1rem; line-height: 1.75; }
.learn-reader .learn-visual-takeaway { display: block; margin-block: 1.5rem; padding: 0.4rem 0 0.4rem 1rem; border: 0; border-left: 3px solid var(--course-blue); border-radius: 0; background: transparent; }
.learn-reader .learn-visual-takeaway strong { display: block; margin-bottom: 0.35rem; font-size: 0.8rem; }
.learn-reader .learn-visual-takeaway p { font-size: 1rem; line-height: 1.65; }
.learn-reader .learn-script-sources { margin-bottom: 1.5rem; color: var(--course-muted); font-size: 0.875rem; }
.learn-reader .learn-visual-model--infographic { margin-block: 2rem; }
.learn-reader .learn-listen-controls { padding: 0 0 0.8rem; }
.learn-reader .learn-listen-status { font-size: 0.75rem; }
.learn-reader .learn-listen-controls:has(button:disabled) { display: none; }
.learn-reader-body > .learn-reader-section:first-of-type .learn-listen-controls:has(button:disabled) { display: flex; }
.learn-reader-finish { margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--course-line); }
.learn-reader-finish p { margin: 0 0 1rem; color: var(--course-muted); line-height: 1.65; }
.learn-reader-finish button { min-height: 48px; font: inherit; font-weight: 750; cursor: pointer; }
@media (max-width: 1150px) {
  .learn-reader-body { margin-inline: auto; }
  .course-view-lesson .course-main:has(.learn-reader-video.is-pinned) { margin-top: 260px; height: calc(100svh - 348px); }
  .learn-reader-video.is-pinned .course-video-player,
  .learn-reader-video.is-pinned .learn-reader-video-dismiss { width: min(320px, calc(100vw - 24px)); right: calc((100vw - min(320px, calc(100vw - 24px))) / 2); }
  .learn-reader-video.is-pinned .course-video-player { top: 96px; height: 200px; }
  .learn-reader-video.is-pinned .learn-reader-video-dismiss { top: 300px; }
}
@media (max-width: 700px) {
  .course-view-lesson .course-main:has(.lesson-shell--learn-reader) { height: calc(100svh - 84px); }
  .course-view-lesson .lesson-shell--learn-reader { min-height: 0; padding: 1.5rem 1.25rem 3rem; }
  .learn-reader .learn-listen-controls { gap: 0.5rem; }
  .learn-reader .learn-listen-status { min-width: 0; }
  .course-view-lesson .course-main:has(.learn-reader-video.is-pinned) { height: calc(100svh - 344px); }
  .learn-reader-video.is-pinned .course-video-player { top: 92px; }
  .learn-reader-video.is-pinned .learn-reader-video-dismiss { top: 296px; }
  .learn-reader .learn-visual-model, .learn-reader .learn-worked-layout { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 360px) {
  .course-view-lesson .course-main:has(.lesson-shell--learn-reader) { height: calc(100svh - 118px); }
  .course-view-lesson .course-main:has(.learn-reader-video.is-pinned) { height: calc(100svh - 378px); }
  .learn-reader-video.is-pinned .course-video-player { top: 126px; }
  .learn-reader-video.is-pinned .learn-reader-video-dismiss { top: 330px; }
}