.manual-page { margin: 0; background: #f5f7fb; color: #182440; font-family: "Segoe UI", Arial, sans-serif; line-height: 1.7; }
.manual-page *, .manual-page *::before, .manual-page *::after { box-sizing: border-box; }
.manual-page [hidden] { display: none !important; }
.manual-page a { color: #2459d9; text-underline-offset: .2em; overflow-wrap: anywhere; }
.manual-page a:hover { color: #16409f; }
.manual-page button, .manual-page input { font: inherit; }
.manual-page button { cursor: pointer; }
.manual-page :focus-visible { outline: 3px solid #2459d9; outline-offset: 4px; }
.manual-page h1, .manual-page h2, .manual-page h3, .manual-page p { margin-top: 0; }
.manual-page h2, .manual-page h3 { line-height: 1.3; text-wrap: balance; }
.manual-page h2 { font-size: 1.85rem; }
.manual-page h3 { font-size: 1.23rem; }
.manual-page li + li { margin-top: .35rem; }
.manual-skip { position: fixed; left: 1rem; top: -5rem; background: white; padding: .6rem 1rem; z-index: 10; }
.manual-skip:focus { top: .5rem; }
.manual-topbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem max(1.5rem, calc((100vw - 1380px) / 2)); background: #fff; border-bottom: 1px solid #d9e0ec; }
.manual-brand { color: #142b58 !important; font-weight: 800; font-size: 1.4rem; text-decoration: none; white-space: nowrap; }
.manual-brand span { color: #2459d9; }
.manual-topbar nav { display: flex; align-items: center; gap: 1.3rem; font-size: .92rem; }
.manual-topbar nav a { text-decoration: none; font-weight: 600; }
.manual-topbar button { border: 1px solid #2459d9; border-radius: 6px; padding: .55rem .9rem; color: #16409f; background: #eff4ff; }
.manual-layout { max-width: 1380px; margin: auto; display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: 44px; padding: 36px 24px 70px; }
.manual-sidebar { align-self: start; position: sticky; top: 24px; max-height: calc(100vh - 48px); overflow: auto; padding-right: 12px; scrollbar-width: thin; }
.manual-sidebar summary { cursor: pointer; font-size: 1rem; font-weight: 750; padding: 8px 0 14px; }
.manual-sidebar summary span { display: block; color: #5d6b83; font-size: .8rem; font-weight: 400; padding-left: 17px; }
.manual-search { padding: 12px 0; border-bottom: 1px solid #d9e0ec; }
.manual-search label { display: block; font-size: .8rem; font-weight: 650; margin-bottom: 6px; }
.manual-search > div { display: flex; gap: 4px; }
.manual-search input { min-width: 0; width: 100%; border: 1px solid #becbe2; border-radius: 5px; background: white; padding: 9px; font-size: .84rem; }
.manual-search button { border: 0; background: transparent; color: #2459d9; font-size: .78rem; }
.manual-search p { font-size: .78rem; margin: 5px 0 0; }
.manual-sidebar h2 { font-size: .78rem; line-height: 1.5; letter-spacing: .035em; text-transform: uppercase; color: #52647f; margin: 24px 0 8px; }
.manual-sidebar ol { list-style: none; padding: 0; margin: 0; }
.manual-sidebar li + li { margin: 0; }
.manual-sidebar li a { display: grid; grid-template-columns: 23px 1fr; gap: 7px; padding: 8px 5px; color: #293d5e; text-decoration: none; font-size: .85rem; line-height: 1.45; border-radius: 5px; }
.manual-sidebar li a:hover { background: #e6edfa; }
.manual-sidebar li a span { color: #2459d9; font-variant-numeric: tabular-nums; }
.manual-index-link { display: block; margin-top: 24px; font-size: .85rem; }
.manual-page main { min-width: 0; max-width: 900px; }
.manual-cover { padding: 58px 56px; background: #132c5b; color: white; border-radius: 10px; position: relative; overflow: hidden; }
.manual-eyebrow { text-transform: uppercase; font-size: .73rem; font-weight: 750; letter-spacing: .11em; color: #2459d9; margin-bottom: 12px; }
.manual-cover .manual-eyebrow { color: #8bd5e4; }
.manual-cover h1 { font-size: clamp(3.4rem, 6vw, 5.5rem); line-height: 1.02; letter-spacing: -.055em; font-weight: 760; margin-bottom: 30px; }
.manual-cover h1 span { color: #87dbdf; }
.manual-cover p:not(.manual-eyebrow) { max-width: 530px; color: #dbe7fa; font-size: 1rem; }
.manual-cover .manual-lead { font-size: 1.5rem !important; line-height: 1.45; color: #fff !important; }
.manual-cover-meta { display: flex; flex-wrap: wrap; gap: 12px 24px; padding: 20px 0 28px; font-size: .84rem; color: #bfcfec; }
.manual-start { display: inline-flex; align-items: center; justify-content: space-between; gap: 20px; padding: 11px 19px; border-radius: 5px; text-decoration: none; background: #2459d9; color: white !important; font-weight: 650; font-size: .94rem; }
.manual-cover .manual-start { background: #fff; color: #173464 !important; }
.manual-introduction { padding: 40px 48px; }
.manual-small { font-size: .85rem; color: #52627d; }
.manual-part { margin-bottom: 40px; }
.manual-part-heading { padding: 32px 40px; background: #e6edf9; border-left: 5px solid #2459d9; border-radius: 5px; }
.manual-part-heading h2 { margin-bottom: 12px; }
.manual-part-heading > p:last-child { margin-bottom: 0; color: #475d80; }
.manual-chapter { margin: 28px 0; padding: 44px 48px; border: 1px solid #dce3ef; border-radius: 8px; background: #fff; scroll-margin-top: 24px; }
.manual-chapter-heading { border-bottom: 1px solid #dce3ef; padding-bottom: 25px; margin-bottom: 30px; }
.manual-chapter-heading h2 { font-size: 2.1rem; letter-spacing: -.025em; }
.manual-lesson-link { display: inline-block; font-size: .9rem; font-weight: 650; }
.manual-chapter-overview { display: grid; grid-template-columns: minmax(0, 1fr); gap: 28px; padding-bottom: 20px; align-items: start; }
.manual-chapter-overview ul { font-size: .9rem; padding-left: 20px; }
.manual-chapter-overview figure { margin: 0; width: 512px; max-width: 100%; min-width: 0; }
.manual-chapter-overview figure > a { display: block; overflow: auto; max-width: 100%; border: 1px solid #dce3ef; border-radius: 6px; background: white; }
.manual-chapter-overview img { display: block; width: 512px; max-width: none; height: 512px; }
.manual-chapter-overview figcaption { font-size: .72rem; text-align: center; color: #61718a; margin-top: 6px; }
.manual-section { margin: 30px 0; scroll-margin-top: 24px; }
.manual-section > p, .manual-teaching-points dd { font-family: Georgia, "Times New Roman", serif; font-size: 1.06rem; line-height: 1.85; }
.manual-section h3 { margin-bottom: 14px; }
.manual-teaching-points { margin: 0 0 24px; }
.manual-teaching-points > div { margin: 18px 0; }
.manual-teaching-points dt { font-weight: 700; font-size: .95rem; margin-bottom: 3px; }
.manual-teaching-points dd { margin: 0; }
.manual-section .manual-takeaway { padding: 16px 20px; background: #edf7f8; border-left: 3px solid #087f8c; font-family: inherit; font-size: .94rem; line-height: 1.7; }
.manual-takeaway strong { display: block; color: #076779; margin-bottom: 4px; }
.manual-section .manual-citations { font: .75rem/1.6 "Segoe UI", Arial, sans-serif; color: #60728e; }
.manual-citations a { margin-right: 6px; }
.manual-recall { background: #f0f4fc; padding: 24px; border-radius: 5px; margin: 32px 0; }
.manual-recall p:last-child { margin: 12px 0 0; }
.manual-references { border-top: 1px solid #dce3ef; padding-top: 24px; }
.manual-references h3 { font-size: 1rem; }
.manual-references ol { padding-left: 22px; font-size: .83rem; }
.manual-references li { padding-left: 4px; scroll-margin-top: 24px; }
.manual-references p { font-size: .78rem; line-height: 1.55; color: #52627d; margin: 4px 0 12px; }
.manual-chapter-nav { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 15px; padding-top: 25px; margin-top: 25px; border-top: 1px solid #dce3ef; font-size: .9rem; }
.manual-module-review, .manual-final-review { background: #fff; padding: 36px 48px; border-radius: 8px; border: 1px solid #dce3ef; }
.manual-module-review ul { padding-left: 20px; margin: 20px 0 28px; }
.manual-module-review li { font-size: .91rem; }
.manual-final-review > h2:not(:first-child) { margin-top: 44px; }
.manual-concept-index { columns: 2; padding-left: 18px; column-gap: 35px; font-size: .9rem; }
.manual-concept-index li { break-inside: avoid; margin-bottom: 10px; }
.manual-concept-index a span { display: block; font-size: .77rem; color: #60728e; }
.manual-footer { padding: 45px 20px; text-align: center; color: #52627d; font-size: .9rem; }
.manual-print-url { display: none; }
.manual-print-toc { display: none; }
@media (max-width: 1100px) {
  .manual-layout { grid-template-columns: 260px minmax(0, 1fr); gap: 26px; padding: 26px 20px; }
  .manual-cover, .manual-chapter, .manual-introduction, .manual-module-review, .manual-final-review { padding: 32px; }
  .manual-chapter-overview { grid-template-columns: minmax(0, 1fr); }
  .manual-chapter-overview figure { max-width: 100%; }
}
@media (max-width: 760px) {
  .manual-topbar { align-items: flex-start; flex-direction: column; gap: 10px; padding: 14px 18px; }
  .manual-topbar nav { width: 100%; gap: 18px; justify-content: space-between; font-size: .8rem; }
  .manual-topbar button { padding: 7px 10px; }
  .manual-layout { display: flex; flex-direction: column; padding: 18px 12px 30px; gap: 18px; }
  .manual-sidebar { position: static; max-height: none; width: 100%; border: 1px solid #d9e0ec; border-radius: 6px; background: #fff; padding: 0 16px; }
  .manual-sidebar summary { padding: 12px 0; }
  .manual-sidebar summary span { display: inline; padding-left: 12px; }
  .manual-sidebar details > nav { max-height: 280px; overflow-y: auto; margin: 12px 0; }
  .manual-sidebar h2:first-child { margin-top: 10px; }
  .manual-page main { width: 100%; }
  .manual-cover { padding: 34px 26px; }
  .manual-cover h1 { font-size: 3.7rem; }
  .manual-cover .manual-eyebrow { font-size: .65rem; }
  .manual-chapter, .manual-introduction, .manual-module-review, .manual-final-review { padding: 27px 20px; }
  .manual-part-heading { padding: 24px 20px; }
  .manual-chapter-heading h2 { font-size: 1.65rem; }
  .manual-page h2 { font-size: 1.55rem; }
  .manual-section > p, .manual-teaching-points dd { font-size: 1.02rem; }
  .manual-chapter-overview { gap: 12px; }
  .manual-chapter-overview figure { max-width: 100%; }
  .manual-concept-index { columns: 1; }
}
@media print {
  @page { size: A4; margin: 18mm 17mm 20mm; }
  .manual-page { background: #fff; color: #111; font-size: 10pt; }
  .manual-topbar, .manual-sidebar, .manual-skip, .manual-chapter-nav, .manual-citations, .manual-search, .manual-start, .manual-recall, .manual-chapter-overview figcaption, .manual-footer > a { display: none !important; }
  .manual-layout { display: block; padding: 0; max-width: none; }
  .manual-page main { width: auto; max-width: none; }
  .manual-cover { background: #fff; color: #142b58; padding: 30mm 0; border: 0; break-after: page; }
  .manual-cover h1 { font-size: 54pt; }
  .manual-cover p, .manual-cover .manual-lead, .manual-cover h1 span, .manual-cover-meta { color: #142b58 !important; }
  .manual-cover .manual-eyebrow { color: #076779; }
  .manual-introduction { padding: 0; break-after: page; }
  .manual-print-toc { display: block; break-after: page; }
  .manual-print-toc h3 { margin-top: 8mm; font-size: 12pt; }
  .manual-print-toc ol { padding: 0; list-style: none; font-size: 10pt; }
  .manual-print-toc li { margin-bottom: 2mm; }
  .manual-part-heading { padding: 0 0 8mm; background: #fff; border: 0; break-before: page; break-after: avoid; }
  .manual-chapter, .manual-module-review, .manual-final-review { padding: 0; border: 0; border-radius: 0; margin: 0; break-before: page; }
  .manual-part-heading + .manual-chapter { break-before: auto; }
  .manual-chapter-heading h2 { font-size: 22pt; }
  .manual-chapter-heading { padding-bottom: 5mm; margin-bottom: 6mm; }
  .manual-chapter-overview { display: block; }
  .manual-chapter-overview figure { width: 160mm; max-width: 100%; margin: 6mm auto; break-inside: avoid; }
  .manual-chapter-overview figure > a { overflow: visible; border: 0; }
  .manual-chapter-overview img { width: 160mm; height: 160mm; max-width: 100%; }
  .manual-section { margin: 6mm 0; }
  .manual-section > p, .manual-teaching-points dd { font-size: 10.5pt; line-height: 1.65; }
  .manual-page h2, .manual-page h3, .manual-teaching-points dt { break-after: avoid; }
  .manual-page p, .manual-page li, .manual-page dd { orphans: 3; widows: 3; }
  .manual-takeaway { break-inside: avoid; }
  .manual-references { margin-top: 8mm; }
  .manual-references li { break-inside: avoid; }
  .manual-page a { color: #163d82; }
  .manual-concept-index { columns: 2; }
  .manual-footer { margin-top: 10mm; padding: 0; }
  .manual-print-url { display: block; }
}