/* ============================================================
 * TwinTransLogi — 教科書互動簡介　樣式檔
 * 色票：DX 藍 #1B4965　·　SX 綠 #4A8C5A　·　琥珀 #D4A574
 * ============================================================ */

/* ===== Reset / Base ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: #1F2937;
  background: #FAF8F3;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
a { color: #1B4965; text-decoration: none; }
a:hover { text-decoration: underline; }

:root {
  --navy-900: #0F2F47;
  --navy-700: #1B4965;
  --navy-500: #2C6E8C;
  --green-700: #3C7549;
  --green-500: #4A8C5A;
  --green-300: #74C480;
  --amber-700: #B8884C;
  --amber-500: #D4A574;
  --red-500: #B85C57;
  --purple-500: #6B5B95;
  --bg-cream: #FAF8F3;
  --bg-white: #FFFFFF;
  --text-900: #0F2F47;
  --text-700: #1F2937;
  --text-500: #4B5563;
  --text-300: #9CA3AF;
  --border-light: #E5E7EB;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

/* ===== Dark mode ===== */
body.dark {
  --bg-cream: #0E1116;
  --bg-white: #1A1F26;
  --text-900: #E8EEF4;
  --text-700: #C8D0DA;
  --text-500: #8A95A3;
  --text-300: #5C6772;
  --border-light: #2A3038;
  background: var(--bg-cream);
  color: var(--text-700);
}
body.dark .feature-card,
body.dark .ch-card,
body.dark .quote-card,
body.dark .stat-cell { background: var(--bg-white); }

/* ===== Layout: Header / Tabs ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-cream);
  border-bottom: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.brand {
  font-size: 17px;
  font-weight: 800;
  color: var(--navy-900);
  white-space: nowrap;
  letter-spacing: 0.04em;
}
body.dark .brand { color: var(--text-900); }
.brand small {
  display: block;
  font-size: 10px;
  color: var(--text-500);
  letter-spacing: 0.25em;
  font-weight: 400;
  margin-top: 2px;
}
.nav-tabs {
  display: flex;
  gap: 4px;
  flex: 1;
  flex-wrap: wrap;
}
.nav-tab {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-500);
  transition: all 0.2s;
  white-space: nowrap;
}
.nav-tab:hover { background: rgba(27, 73, 101, 0.08); color: var(--navy-700); }
.nav-tab.active {
  background: var(--navy-700);
  color: #fff;
}
.nav-tab.active:hover { color: #fff; background: var(--navy-900); }
.header-tools {
  display: flex;
  gap: 8px;
  align-items: center;
}
.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--text-500);
  transition: all 0.2s;
}
.icon-btn:hover { background: rgba(27, 73, 101, 0.08); color: var(--navy-700); }
.search-box {
  position: relative;
  display: none;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 4px 10px;
  align-items: center;
  gap: 6px;
}
.search-box.show { display: flex; }
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  width: 220px;
  font-size: 14px;
  color: var(--text-700);
  font-family: inherit;
  padding: 4px 0;
}

/* ===== Hero (Home Tab) ===== */
.hero {
  background: linear-gradient(135deg, var(--navy-900) 0%, var(--navy-700) 50%, var(--navy-500) 100%);
  color: #FAF8F3;
  padding: 80px 0 60px 0;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(212, 165, 116, 0.15) 0%, transparent 70%);
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}
.hero-eyebrow {
  font-size: 12px;
  letter-spacing: 0.4em;
  color: var(--amber-500);
  margin-bottom: 24px;
  border-left: 3px solid var(--amber-500);
  padding-left: 14px;
}
.hero-title {
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.1;
  margin-bottom: 14px;
}
.hero-subtitle {
  font-size: clamp(18px, 2.4vw, 28px);
  font-weight: 300;
  color: #C8DCEA;
  letter-spacing: 0.06em;
  margin-bottom: 36px;
}
.hero-tagline {
  border-top: 2px solid rgba(212, 165, 116, 0.4);
  padding-top: 18px;
  font-size: clamp(14px, 1.4vw, 17px);
  color: #E8F0F7;
  line-height: 1.8;
  max-width: 760px;
}
.hero-tagline strong { color: var(--amber-500); }

.hero-axes {
  display: flex;
  gap: 14px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.hero-axis {
  flex: 1 1 280px;
  padding: 14px 20px;
  border-radius: var(--radius-md);
}
.hero-axis.dx { background: rgba(74, 144, 184, 0.18); border-left: 4px solid #5DADE2; }
.hero-axis.sx { background: rgba(74, 140, 90, 0.18); border-left: 4px solid var(--green-300); }
.hero-axis-label {
  font-size: 10px;
  color: #C8DCEA;
  letter-spacing: 0.22em;
  margin-bottom: 4px;
}
.hero-axis-name { font-size: 18px; font-weight: 700; }

.hero-cta {
  margin-top: 40px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
}
.btn-primary {
  background: var(--amber-500);
  color: var(--navy-900);
}
.btn-primary:hover { background: var(--amber-700); transform: translateY(-1px); text-decoration: none; }
.btn-ghost {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.3);
}
.btn-ghost:hover { background: rgba(255,255,255,0.18); text-decoration: none; }

/* ===== Section common ===== */
.section { padding: 60px 0; }
.section-inner { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-eyebrow {
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--navy-700);
  font-weight: 600;
  margin-bottom: 8px;
}
.section-title {
  font-size: clamp(24px, 3.5vw, 36px);
  color: var(--text-900);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 18px;
  border-bottom: 3px solid var(--amber-500);
  padding-bottom: 12px;
  display: inline-block;
}
.section-lede {
  font-size: 15px;
  color: var(--text-500);
  line-height: 1.85;
  margin-bottom: 36px;
  max-width: 800px;
}
body.dark .section-eyebrow { color: var(--amber-500); }
body.dark .section-title { color: var(--text-900); }

/* ===== Features grid (5 cards) ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-top: 24px;
}
.feature-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 22px 22px 18px 22px;
  border-top: 4px solid var(--navy-700);
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}
.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.feature-card.color-navy { border-top-color: var(--navy-700); }
.feature-card.color-green { border-top-color: var(--green-500); }
.feature-card.color-amber { border-top-color: var(--amber-500); }
.feature-card.color-red { border-top-color: var(--red-500); }
.feature-card.color-purple { border-top-color: var(--purple-500); }
.feature-num {
  font-size: 11px;
  color: var(--text-500);
  letter-spacing: 0.3em;
  margin-bottom: 8px;
}
.feature-title {
  font-size: 17px;
  font-weight: 800;
  color: var(--text-900);
  margin-bottom: 10px;
  line-height: 1.4;
}
.feature-body {
  font-size: 14px;
  color: var(--text-700);
  line-height: 1.7;
}
.feature-body strong { color: var(--navy-700); }
body.dark .feature-body strong { color: var(--amber-500); }

/* ===== Parts preview on home ===== */
.parts-preview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-top: 24px;
}
.part-preview {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 20px;
  border-top: 4px solid var(--navy-700);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all 0.2s;
}
.part-preview:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.part-preview.p1 { border-top-color: var(--purple-500); }
.part-preview.p2 { border-top-color: var(--navy-700); }
.part-preview.p3 { border-top-color: var(--green-500); }
.part-preview.p4 { border-top-color: var(--amber-500); }
.part-eyebrow {
  font-size: 10px;
  letter-spacing: 0.25em;
  color: var(--text-500);
  margin-bottom: 6px;
}
.part-name {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-900);
  margin-bottom: 4px;
}
.part-tagline {
  font-size: 12px;
  color: var(--text-500);
  margin-bottom: 12px;
}
.part-chapters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.part-chip {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: rgba(27, 73, 101, 0.08);
  color: var(--navy-700);
  font-weight: 600;
}
body.dark .part-chip { background: rgba(212, 165, 116, 0.15); color: var(--amber-500); }

/* ===== Stats row ===== */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 24px;
}
.stat-cell {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 22px 14px;
  text-align: center;
  border-bottom: 3px solid var(--navy-700);
  box-shadow: var(--shadow-sm);
}
.stat-num {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-900);
  line-height: 1;
}
.stat-label {
  font-size: 11px;
  color: var(--text-500);
  margin-top: 8px;
  letter-spacing: 0.1em;
}

/* ===== KRI banner ===== */
.kri-banner {
  background: linear-gradient(90deg, var(--green-500) 0%, var(--green-300) 100%);
  color: #fff;
  border-radius: var(--radius-md);
  padding: 24px 32px;
  margin-top: 28px;
  display: grid;
  grid-template-columns: auto 1fr 1fr;
  gap: 32px;
  align-items: center;
}
@media (max-width: 720px) { .kri-banner { grid-template-columns: 1fr; } }
.kri-banner-tag {
  font-size: 11px;
  letter-spacing: 0.3em;
  color: #DFF0E2;
}
.kri-banner-title { font-size: 18px; font-weight: 800; }
.kri-item-label { font-size: 18px; font-weight: 800; margin-bottom: 4px; }
.kri-item-desc { font-size: 13px; color: #DFF0E2; line-height: 1.6; }

/* ===== Part page sub-nav ===== */
.tab-page { display: none; }
.tab-page.active { display: block; }
.part-header {
  background: linear-gradient(135deg, var(--navy-900) 0%, var(--navy-700) 100%);
  color: #fff;
  padding: 48px 0 36px 0;
}
.part-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.part-header-eyebrow {
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--amber-500);
  margin-bottom: 12px;
}
.part-header-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  margin-bottom: 8px;
}
.part-header-tagline {
  font-size: 16px;
  color: #C8DCEA;
}

.subnav {
  position: sticky;
  top: 64px;
  background: var(--bg-cream);
  border-bottom: 1px solid var(--border-light);
  z-index: 50;
  backdrop-filter: blur(8px);
}
.subnav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 24px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}
.subnav a {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-500);
  white-space: nowrap;
  transition: all 0.2s;
}
.subnav a:hover { background: rgba(27,73,101,0.08); color: var(--navy-700); text-decoration: none; }
.subnav a.current { background: var(--navy-700); color: #fff; }

/* ===== Chapter card (三件套) ===== */
.ch-list { padding: 36px 0; }
.ch-card {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-md);
  scroll-margin-top: 120px;
}
.ch-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--amber-500);
}
.ch-num {
  font-size: 14px;
  letter-spacing: 0.25em;
  color: var(--amber-500);
  font-weight: 700;
}
.ch-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-900);
  flex: 1;
  min-width: 0;
}
.ch-subtitle {
  font-size: 14px;
  color: var(--text-500);
  font-weight: 400;
  margin-left: 8px;
}
.ch-axes {
  display: flex;
  gap: 4px;
}
.ch-axis-chip {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
}
.ch-axis-chip.dx { background: rgba(74, 144, 184, 0.18); color: #2C6E8C; }
.ch-axis-chip.sx { background: rgba(74, 140, 90, 0.18); color: var(--green-700); }
.ch-status-chip {
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 12px;
  background: rgba(74, 140, 90, 0.18);
  color: var(--green-700);
  font-weight: 700;
  letter-spacing: 0.05em;
}
.ch-status-chip.draft { background: rgba(212, 165, 116, 0.2); color: var(--amber-700); }
.ch-status-chip.todo { background: rgba(156, 163, 175, 0.2); color: var(--text-500); }

.ch-video {
  margin-bottom: 24px;
  background: linear-gradient(135deg, rgba(15, 47, 71, 0.04) 0%, rgba(212, 165, 116, 0.06) 100%);
  border-radius: var(--radius-md);
  padding: 16px;
  border: 1px solid var(--border-light);
}
body.dark .ch-video { background: linear-gradient(135deg, rgba(212, 165, 116, 0.1) 0%, rgba(74, 140, 90, 0.08) 100%); }
.ch-video-tag {
  font-size: 13px;
  font-weight: 700;
  color: var(--navy-700);
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
body.dark .ch-video-tag { color: var(--amber-500); }
.ch-video-frame {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: #000;
  box-shadow: var(--shadow-md);
}
.ch-video-frame iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.ch-video-link {
  display: inline-block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--navy-700);
  letter-spacing: 0.03em;
}
.ch-video-link:hover { color: var(--amber-700); }
body.dark .ch-video-link { color: var(--amber-500); }

.ch-body {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 28px;
}
@media (max-width: 860px) { .ch-body { grid-template-columns: 1fr; } }

/* ===== Dialogue (chat bubbles) ===== */
.dialogue {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.bubble {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.bubble.allen { justify-content: flex-start; }
.bubble.ware { justify-content: flex-end; flex-direction: row-reverse; }
.bubble.route { justify-content: flex-end; flex-direction: row-reverse; }
.bubble.narrator {
  font-size: 12px;
  color: var(--text-500);
  font-style: italic;
  padding: 8px 14px;
  background: rgba(156, 163, 175, 0.1);
  border-radius: var(--radius-sm);
  border-left: 2px solid var(--text-300);
  line-height: 1.6;
}
.avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
  margin-top: 2px;
}
.avatar.allen { background: var(--purple-500); }
.avatar.ware { background: var(--navy-500); }
.avatar.route { background: var(--green-500); }
.bubble-content {
  max-width: 78%;
  padding: 10px 14px;
  border-radius: var(--radius-md);
  font-size: 14px;
  line-height: 1.6;
}
.bubble.allen .bubble-content {
  background: rgba(107, 91, 149, 0.1);
  color: var(--text-900);
  border-top-left-radius: 4px;
}
.bubble.ware .bubble-content {
  background: rgba(44, 110, 140, 0.12);
  color: var(--text-900);
  border-top-right-radius: 4px;
}
.bubble.route .bubble-content {
  background: rgba(74, 140, 90, 0.12);
  color: var(--text-900);
  border-top-right-radius: 4px;
}
body.dark .bubble.allen .bubble-content,
body.dark .bubble.ware .bubble-content,
body.dark .bubble.route .bubble-content { color: var(--text-900); }
.bubble-name {
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 2px;
  letter-spacing: 0.05em;
}
.bubble.allen .bubble-name { color: var(--purple-500); }
.bubble.ware .bubble-name { color: var(--navy-500); text-align: right; }
.bubble.route .bubble-name { color: var(--green-500); text-align: right; }

/* ===== Figure & summary ===== */
.ch-figure {
  background: var(--bg-cream);
  border-radius: var(--radius-md);
  padding: 12px;
  margin-bottom: 14px;
  cursor: zoom-in;
  border: 1px solid var(--border-light);
}
.ch-figure img { border-radius: var(--radius-sm); }
.ch-fig-caption {
  font-size: 12px;
  color: var(--text-500);
  margin-top: 8px;
  text-align: center;
  line-height: 1.5;
}
.ch-summary {
  font-size: 14px;
  color: var(--text-700);
  line-height: 1.8;
  background: var(--bg-cream);
  border-left: 4px solid var(--navy-700);
  padding: 14px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.ch-kri-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.ch-kri-chip {
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 12px;
  background: rgba(27, 73, 101, 0.08);
  color: var(--navy-700);
  font-weight: 600;
}
body.dark .ch-kri-chip { background: rgba(212, 165, 116, 0.15); color: var(--amber-500); }

.ch-trial {
  margin-top: 16px;
  padding: 14px;
  border: 1px dashed var(--amber-500);
  border-radius: var(--radius-sm);
  background: rgba(212, 165, 116, 0.06);
}
.ch-trial-tag {
  font-size: 10px;
  letter-spacing: 0.25em;
  color: var(--amber-700);
  font-weight: 700;
  margin-bottom: 8px;
}
.ch-trial-q { font-size: 13px; font-weight: 600; margin-bottom: 8px; color: var(--text-900); }
.ch-trial-opts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 12px;
  font-size: 12px;
  color: var(--text-700);
}
.ch-trial-opt {
  padding: 4px 0;
  cursor: pointer;
  user-select: none;
}
.ch-trial-opt.correct { color: var(--green-700); font-weight: 700; }
.ch-trial-exp {
  display: none;
  margin-top: 8px;
  padding: 8px;
  background: rgba(74, 140, 90, 0.08);
  border-radius: 4px;
  font-size: 12px;
  color: var(--text-700);
  line-height: 1.6;
}
.ch-trial.show .ch-trial-exp { display: block; }

/* ===== Quote ===== */
.quote-card {
  background: var(--bg-white);
  border-radius: var(--radius-md);
  padding: 22px 24px 22px 32px;
  margin-bottom: 14px;
  position: relative;
  border-left: 4px solid var(--amber-500);
  box-shadow: var(--shadow-sm);
}
.quote-mark {
  position: absolute;
  top: 4px;
  left: 10px;
  font-size: 36px;
  color: var(--amber-500);
  line-height: 0.8;
  font-weight: 900;
}
.quote-text {
  font-size: 16px;
  color: var(--text-900);
  line-height: 1.7;
  font-weight: 600;
  margin-bottom: 6px;
}
.quote-cite { font-size: 12px; color: var(--text-500); }

/* ===== Lightbox ===== */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.92);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 24px;
  cursor: zoom-out;
}
.lightbox.show { display: flex; }
.lightbox img {
  max-width: 95vw;
  max-height: 92vh;
  border-radius: var(--radius-md);
  box-shadow: 0 0 60px rgba(212, 165, 116, 0.2);
}
.lightbox-close {
  position: absolute;
  top: 18px;
  right: 24px;
  font-size: 28px;
  color: #fff;
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
}
.lightbox-close:hover { background: rgba(255,255,255,0.25); }

/* ===== Footer ===== */
.site-footer {
  background: linear-gradient(135deg, var(--navy-900) 0%, var(--navy-700) 100%);
  color: #DCE7F0;
  padding: 48px 0 32px 0;
  margin-top: 60px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1.2fr 0.8fr;
  gap: 36px;
}
@media (max-width: 760px) { .footer-inner { grid-template-columns: 1fr; } }
.footer-eyebrow {
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--amber-500);
  margin-bottom: 8px;
}
.footer-name { font-size: 17px; font-weight: 800; color: #fff; margin-bottom: 4px; }
.footer-affil { font-size: 13px; color: #C8DCEA; line-height: 1.6; }
.footer-lab-name { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.footer-lab-desc { font-size: 12px; line-height: 1.7; color: #C8DCEA; }
.footer-meta {
  font-size: 11px;
  color: #C8DCEA;
  letter-spacing: 0.15em;
  text-align: right;
  line-height: 2;
}
@media (max-width: 760px) { .footer-meta { text-align: left; } }
.footer-bottom {
  max-width: 1200px;
  margin: 32px auto 0 auto;
  padding: 16px 24px 0 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 11px;
  color: #9CA3AF;
  text-align: center;
  letter-spacing: 0.15em;
}

/* ===== DX/SX filter chips ===== */
.filter-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.filter-label {
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--text-500);
  font-weight: 600;
}
.filter-chip {
  padding: 5px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 700;
  border: 1px solid var(--border-light);
  background: var(--bg-white);
  color: var(--text-700);
  cursor: pointer;
  letter-spacing: 0.05em;
}
.filter-chip:hover { border-color: var(--navy-700); }
.filter-chip.active.all { background: var(--navy-700); color: #fff; border-color: var(--navy-700); }
.filter-chip.active.dx { background: #5DADE2; color: #fff; border-color: #5DADE2; }
.filter-chip.active.sx { background: var(--green-500); color: #fff; border-color: var(--green-500); }
.filter-chip.active.both { background: var(--amber-500); color: var(--navy-900); border-color: var(--amber-500); }
.filter-count {
  margin-left: 8px;
  font-size: 12px;
  color: var(--text-500);
  letter-spacing: 0.05em;
  font-weight: 600;
  padding: 4px 10px;
  background: rgba(212, 165, 116, 0.12);
  border-radius: 12px;
  white-space: nowrap;
}
body.dark .filter-count { background: rgba(212, 165, 116, 0.2); color: var(--amber-500); }
.ch-card { transition: opacity 0.2s; }
.ch-card.hidden { display: none; }

/* ===== Carousel (quotes) ===== */
.carousel {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 12px;
  scrollbar-width: thin;
}
.carousel .quote-card {
  flex: 0 0 calc(min(440px, 80%));
  scroll-snap-align: start;
  margin-bottom: 0;
}

/* ===== Print ===== */
@media print {
  .site-header, .nav-tabs, .header-tools, .subnav, .filter-bar, .hero-cta, .lightbox { display: none !important; }
  .tab-page { display: block !important; page-break-before: always; }
  .ch-card { box-shadow: none; border: 1px solid #ccc; page-break-inside: avoid; }
  body { background: #fff; }
  .hero { padding: 24px 0; background: none; color: var(--navy-900); }
  .hero-eyebrow, .hero-axis-label { color: var(--amber-700); border-color: var(--amber-700); }
  .hero-subtitle { color: var(--text-500); }
  .hero-tagline { color: var(--text-700); }
}

/* ===== Mobile ===== */
@media (max-width: 600px) {
  .header-inner { gap: 12px; padding: 10px 16px; }
  .brand { font-size: 14px; }
  .nav-tab { padding: 6px 10px; font-size: 12px; }
  .section { padding: 36px 0; }
  .ch-card { padding: 18px; }
  .hero { padding: 56px 0 40px 0; }
}