:root {
  --bg: #f4efe4;
  --paper: #fffdf8;
  --paper-strong: #fffaf2;
  --ink: #1d2422;
  --muted: #5f685f;
  --line: #d9d0bf;
  --accent: #0e766e;
  --accent-strong: #0a5a55;
  --accent-soft: #d7f3ef;
  --accent-warm: #ba5f1a;
  --accent-warm-soft: #faeddc;
  --shadow-lg: 0 18px 44px rgba(41, 35, 25, 0.08);
  --shadow-md: 0 12px 28px rgba(41, 35, 25, 0.06);
  --shadow-sm: 0 6px 18px rgba(41, 35, 25, 0.05);
  --radius-xl: 32px;
  --radius-lg: 20px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --max-width: 1440px;
  --sans: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
  --serif: "Iowan Old Style", "Baskerville", "Palatino Linotype", Georgia, serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--serif);
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(14, 118, 110, 0.09), transparent 22%),
    radial-gradient(circle at top left, rgba(186, 95, 26, 0.05), transparent 20%),
    linear-gradient(180deg, #faf6ef 0%, var(--bg) 100%);
  line-height: 1.72;
}

a { color: inherit; }
img { display: block; max-width: 100%; }

.page-shell {
  width: min(calc(100% - 28px), var(--max-width));
  margin: 0 auto 80px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  border-bottom: 1px solid rgba(217, 208, 191, 0.72);
  background: rgba(250, 246, 239, 0.88);
  backdrop-filter: blur(18px);
}

.topbar {
  width: min(calc(100% - 28px), var(--max-width));
  margin: 0 auto;
  min-height: 74px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 18px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 3px;
  text-decoration: none;
}

.brand-mark {
  color: var(--accent);
  font: 700 0.76rem/1.2 var(--sans);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.brand-title {
  color: var(--ink);
  font: 600 1rem/1.2 var(--sans);
}

.topnav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.topnav a {
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  font: 600 0.9rem/1.2 var(--sans);
}

.topnav a:hover,
.topnav a.active {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.topnav a.active {
  box-shadow: inset 0 0 0 1px rgba(14, 118, 110, 0.1);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 10px 14px;
  font: 600 0.9rem/1 var(--sans);
  cursor: pointer;
}

.hero {
  padding: 46px 0 24px;
}

.hero-card {
  background: var(--paper);
  border: 1px solid rgba(217, 208, 191, 0.9);
  border-radius: 34px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero-intro {
  padding: 34px 36px 26px;
  background:
    linear-gradient(135deg, rgba(14, 118, 110, 0.11), rgba(186, 95, 26, 0.08)),
    linear-gradient(180deg, rgba(255, 255, 255, 0.93), rgba(255, 255, 255, 1));
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font: 700 0.78rem/1.2 var(--sans);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.06;
}

h1 {
  margin-top: 14px;
  font-size: clamp(2.4rem, 5vw, 5rem);
  max-width: 12ch;
}

.hero-subtitle {
  margin: 18px 0 0;
  max-width: 76ch;
  color: #2b332f;
  font-size: 1.08rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 18px;
  padding: 0 36px 34px;
}

.hero-panel,
.page-card,
.section-card,
.info-card,
.nav-card,
.video-card,
.glossary-card,
.figure-card,
.definition-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.hero-panel,
.page-card,
.info-card,
.nav-card,
.video-card,
.glossary-card {
  padding: 22px;
}

.hero-panel h2,
.page-card h2,
.section-card h2,
.info-card h2 {
  font-size: 1.22rem;
  margin-bottom: 10px;
}

.section-card h1 {
  max-width: none;
  font-size: clamp(1.9rem, 3vw, 3.2rem);
  margin-top: 10px;
}

.layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr) 340px;
  gap: 22px;
  align-items: start;
}

.sidebar,
.aside {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 16px;
}

.sidebar-card,
.aside-card {
  background: rgba(255, 252, 246, 0.94);
  border: 1px solid rgba(217, 208, 191, 0.96);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 18px;
}

.sidebar-card h2,
.aside-card h2 {
  font-size: 0.95rem;
  margin-bottom: 12px;
  font-family: var(--sans);
}

.chapter-list,
.mini-nav,
.toc {
  display: grid;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.chapter-list a,
.mini-nav a,
.toc a {
  display: block;
  text-decoration: none;
  color: var(--muted);
  border-radius: 14px;
  padding: 10px 12px;
  font: 600 0.92rem/1.35 var(--sans);
}

.chapter-list a:hover,
.chapter-list a.active,
.mini-nav a:hover,
.mini-nav a.active,
.toc a:hover,
.toc a.active {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.chapter-list small {
  display: block;
  margin-top: 4px;
  color: #748078;
  font: 500 0.78rem/1.35 var(--sans);
}

.chapter-list a {
  min-height: 72px;
  background: rgba(255, 255, 255, 0.66);
}

.content {
  display: grid;
  gap: 20px;
}

.section-card,
.page-card {
  padding: 30px;
}

.kicker {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--accent);
  font: 700 0.8rem/1.2 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-card p,
.page-card p,
.hero-panel p,
.info-card p,
.nav-card p,
.video-card p,
.glossary-card p {
  margin: 0 0 14px;
}

.definition-grid,
.route-grid,
.card-grid,
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.definition-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 18px 0 22px;
}

.definition-card {
  padding: 16px;
}

.definition-card h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.definition-card p {
  margin: 0;
  color: #39413b;
  font-size: 0.95rem;
}

.term {
  appearance: none;
  padding: 0;
  border: 0;
  background: none;
  color: var(--accent);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  border-bottom: 1px solid rgba(14, 118, 110, 0.28);
}

.term:hover,
.term:focus-visible,
.term.active {
  color: var(--accent-strong);
  border-bottom-color: rgba(10, 90, 85, 0.65);
  outline: none;
}

.term-inline {
  margin: 14px 0 0;
}

.term-inline-card {
  position: relative;
  padding: 16px;
  border: 1px solid rgba(14, 118, 110, 0.16);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 253, 248, 0.98), rgba(250, 245, 236, 0.98));
  box-shadow: var(--shadow-sm);
}

.term-inline-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.term-origin {
  color: var(--accent);
  font: 700 0.76rem/1.2 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.term-inline-close {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  border-radius: 999px;
  padding: 8px 11px;
  font: 700 0.75rem/1 var(--sans);
  cursor: pointer;
}

.callout {
  margin: 18px 0;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
}

.callout strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.94rem;
  font-family: var(--sans);
}

.takeaway {
  background: rgba(14, 118, 110, 0.08);
  border-color: rgba(14, 118, 110, 0.18);
}

.grounded {
  background: rgba(56, 189, 248, 0.08);
  border-color: rgba(56, 189, 248, 0.18);
}

.caution {
  background: rgba(186, 95, 26, 0.08);
  border-color: rgba(186, 95, 26, 0.18);
}

.figure-card {
  overflow: hidden;
  margin-top: 22px;
}

.figure-card a { display: block; }

.figure-body {
  padding: 16px 18px 18px;
}

.figure-body figcaption,
.figure-body p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.93rem;
}

.figure-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-strong);
  text-decoration: none;
  font: 700 0.85rem/1.2 var(--sans);
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.video-card {
  overflow: hidden;
  padding: 0;
}

.video-thumb {
  display: grid;
  align-content: end;
  min-height: 220px;
  padding: 18px;
  text-decoration: none;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.18), transparent 22%),
    linear-gradient(135deg, #0f5d57, #15313a 58%, #2c1a0f);
}

.video-thumb.audio {
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.18), transparent 22%),
    linear-gradient(135deg, #8d4d14, #3b2a1d 58%, #171d2f);
}

.video-thumb-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  margin-bottom: auto;
  padding: 7px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(10px);
  font: 700 0.74rem/1.2 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.video-thumb-art {
  display: grid;
  gap: 10px;
}

.video-thumb-art strong {
  font: 700 clamp(1.2rem, 2vw, 1.6rem) / 1.1 var(--sans);
}

.video-thumb-art span {
  max-width: 34ch;
  color: rgba(255, 255, 255, 0.82);
  font: 500 0.96rem/1.5 var(--sans);
}

.video-body {
  padding: 18px;
}

.video-meta {
  margin-bottom: 8px;
  color: var(--accent);
  font: 700 0.77rem/1.2 var(--sans);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pagination {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  padding: 11px 16px;
  font: 700 0.88rem/1.2 var(--sans);
}

.button-link:hover {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.button-link.warm:hover {
  background: var(--accent-warm-soft);
  color: var(--accent-warm);
}

.button-link.active,
.button-link:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(14, 118, 110, 0.12);
}

.helper-note,
.glossary-status {
  color: var(--muted);
  font-size: 0.93rem;
}

.glossary-definition {
  font-size: 1rem;
}

.glossary-meta {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.glossary-note {
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(14, 118, 110, 0.06);
  border: 1px solid rgba(14, 118, 110, 0.12);
}

.glossary-note strong {
  display: block;
  margin-bottom: 5px;
  font: 700 0.84rem/1.2 var(--sans);
}

.glossary-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.glossary-toolbar {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

.chapter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chapter-pills a {
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid var(--line);
  color: var(--muted);
  font: 700 0.8rem/1.2 var(--sans);
}

.search {
  width: 100%;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
  padding: 12px 14px;
  font: inherit;
}

.floating-term {
  position: fixed;
  z-index: 80;
  width: min(360px, calc(100vw - 24px));
  padding: 16px;
  border: 1px solid rgba(14, 118, 110, 0.18);
  border-radius: 18px;
  background: rgba(255, 253, 248, 0.98);
  box-shadow: 0 22px 48px rgba(32, 28, 20, 0.14);
  backdrop-filter: blur(14px);
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.floating-term::before {
  content: "";
  position: absolute;
  top: -8px;
  left: 24px;
  width: 16px;
  height: 16px;
  transform: rotate(45deg);
  background: rgba(255, 253, 248, 0.98);
  border-left: 1px solid rgba(14, 118, 110, 0.18);
  border-top: 1px solid rgba(14, 118, 110, 0.18);
}

.floating-term.above::before {
  top: auto;
  bottom: -8px;
  border-left: 0;
  border-top: 0;
  border-right: 1px solid rgba(14, 118, 110, 0.18);
  border-bottom: 1px solid rgba(14, 118, 110, 0.18);
}

.floating-term.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.floating-term h3,
.term-inline-card h3 {
  font-size: 1.08rem;
  margin-bottom: 8px;
}

.floating-term p,
.term-inline-card p {
  margin: 0 0 12px;
}

.floating-term .glossary-links,
.term-inline-card .glossary-links {
  margin-top: 10px;
}

.reading-dock {
  display: none;
}

.reading-dock-nav {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: 12px;
  z-index: 75;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  padding: 10px;
  border-radius: 22px;
  border: 1px solid rgba(217, 208, 191, 0.94);
  background: rgba(255, 253, 248, 0.96);
  box-shadow: 0 18px 40px rgba(26, 28, 25, 0.14);
  backdrop-filter: blur(14px);
}

.reading-dock-nav a,
.reading-dock-nav span {
  display: grid;
  justify-items: center;
  gap: 3px;
  padding: 10px 8px;
  text-align: center;
  border-radius: 16px;
  text-decoration: none;
  font: 700 0.76rem/1.2 var(--sans);
}

.reading-dock-nav a {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(217, 208, 191, 0.88);
}

.reading-dock-nav small {
  color: var(--muted);
  font: 600 0.68rem/1.2 var(--sans);
}

.reading-dock-nav span {
  color: #95a09a;
  background: rgba(242, 238, 230, 0.92);
  border: 1px dashed rgba(217, 208, 191, 0.92);
}

.footer {
  padding: 24px 0 0;
  color: var(--muted);
  text-align: center;
  font-size: 0.92rem;
}

@media (max-width: 1200px) {
  .layout {
    grid-template-columns: 220px minmax(0, 1fr);
  }

  .aside {
    grid-column: 1 / -1;
    position: static;
  }
}

@media (max-width: 920px) {
  .page-shell { width: min(calc(100% - 18px), var(--max-width)); }

  .site-header {
    position: static;
  }

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

  .menu-toggle { display: inline-flex; }

  .topnav {
    position: absolute;
    top: calc(100% + 8px);
    left: 10px;
    right: 10px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: rgba(255, 253, 248, 0.98);
    box-shadow: var(--shadow-lg);
  }

  .topnav.open { display: flex; }

  .hero-grid,
  .layout,
  .definition-grid,
  .route-grid,
  .card-grid,
  .video-grid,
  .glossary-grid {
    grid-template-columns: 1fr;
  }

  .hero-intro,
  .hero-grid,
  .section-card,
  .page-card,
  .hero-panel,
  .info-card,
  .nav-card,
  .video-body,
  .glossary-card {
    padding-left: 18px;
    padding-right: 18px;
  }

  .hero-intro {
    padding-top: 24px;
    padding-bottom: 22px;
  }

  .hero-grid { padding-top: 0; }

  .sidebar,
  .aside {
    position: static;
  }

  .sidebar {
    display: none;
  }

  .aside {
    display: none;
  }

  .brand-title {
    font-size: 0.92rem;
  }

  h1 {
    font-size: clamp(2.1rem, 10vw, 3.4rem);
  }

  .pagination {
    flex-direction: column;
  }

  .glossary-toolbar {
    gap: 10px;
  }

  .chapter-pills {
    overflow-x: auto;
    padding-bottom: 4px;
    flex-wrap: nowrap;
  }

  .chapter-pills a {
    white-space: nowrap;
  }

  .reading-dock {
    display: block;
    height: 86px;
  }
}

@media print {
  body { background: #fff; }
  .site-header,
  .sidebar,
  .aside,
  .menu-toggle,
  .floating-term,
  .reading-dock { display: none !important; }
  .page-shell { width: 100%; margin: 0; }
  .hero-card,
  .hero-panel,
  .page-card,
  .section-card,
  .info-card,
  .video-card,
  .glossary-card,
  .nav-card,
  .definition-card,
  .figure-card {
    box-shadow: none;
  }
}