/* Floating one-row banner. Sticky with a gap, so it never covers the middle of the page. */
html { scroll-padding-top: calc(var(--header-h) + 28px); }
h1, h2, h3, .block, .hero, .track-card { scroll-margin-top: calc(var(--header-h) + 28px); }
.topbar {
  position: sticky;
  top: 10px;
  z-index: 40;
  display: flex;
  align-items: center;
  gap: 8px;
  height: var(--header-h);
  max-height: var(--header-h);
  margin: 10px 12px 8px;
  padding: 0 10px;
  overflow: hidden;
  flex-wrap: nowrap;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  color: #f8fafc;
  background:
    radial-gradient(420px 80px at 0% 0%, rgba(34, 211, 238, 0.55), transparent 60%),
    radial-gradient(380px 80px at 80% 120%, rgba(244, 114, 182, 0.45), transparent 60%),
    linear-gradient(115deg, #042f2e 0%, #1e1b4b 42%, #4c1d95 78%, #9d174d 100%);
  box-shadow:
    0 18px 40px rgba(15, 23, 42, 0.38),
    0 0 26px rgba(34, 211, 238, 0.48),
    inset 0 1px 0 rgba(255, 255, 255, 0.42);
}
.menu-btn, .display-btn, .rail-arrow {
  flex: none;
  min-height: 44px;
  border: 0;
  border-radius: 12px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  color: #1e1b4b;
  background: linear-gradient(145deg, #fff, #a5f3fc);
  box-shadow: 0 0 12px rgba(34, 211, 238, 0.8);
}
.menu-btn { display: inline-flex; align-items: center; gap: 6px; padding: 0 12px; }
.display-btn, .rail-arrow { padding: 0 10px; }
.brand-home {
  flex: none;
  color: #fff;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.01em;
  text-shadow: 0 0 12px rgba(255, 255, 255, 0.35);
}
.brand-home small { display: block; font-weight: 700; font-size: 0.75rem; color: #f8fafc; }
.rail-wrap {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}
.section-rail {
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
  overflow-x: auto;
  overflow-y: hidden;
  max-height: 44px;
  min-height: 44px;
  scrollbar-width: none;
  min-width: 0;
}
.section-rail::-webkit-scrollbar { display: none; }
.section-chip {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  color: #1e1b4b;
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 750;
  white-space: nowrap;
}
.section-chip .chip-ico {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: linear-gradient(145deg, #fff, #67e8f9);
  box-shadow: 0 0 8px rgba(34, 211, 238, 0.7), 0 4px 0 rgba(15, 23, 42, 0.18);
  transition: transform 0.2s ease;
}
html.motion .section-chip:hover .chip-ico,
html.motion .section-chip:focus-visible .chip-ico {
  transform: translateY(-2px) perspective(80px) rotateX(16deg) rotateY(-14deg);
}
.section-chip:nth-child(3n) .chip-ico { background: linear-gradient(145deg, #fff, #fbcfe8); }
.section-chip:nth-child(3n+2) .chip-ico { background: linear-gradient(145deg, #fff, #fde68a); }
.section-chip[aria-current="page"] { outline: 2px solid #fde047; }

.drawer-scrim {
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(15, 23, 42, 0.48);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.32s ease;
}
.drawer-scrim.is-open { opacity: 1; pointer-events: auto; }
.drawer {
  position: fixed;
  z-index: 60;
  top: 0;
  bottom: 0;
  left: 0;
  width: min(420px, 92vw);
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 12px calc(16px + env(safe-area-inset-bottom));
  overflow: auto;
  background: var(--bg);
  color: var(--ink);
  transform: translateX(-105%);
  transition: transform 0.32s ease;
  box-shadow: 12px 0 40px rgba(0, 0, 0, 0.28);
}
.drawer.is-open { transform: translateX(0); }
.drawer-bar { display: flex; align-items: center; justify-content: space-between; min-height: 44px; }
.drawer-bar p { margin: 0; font-weight: 800; font-size: 1.15rem; }
.drawer-close, .menu-search input {
  min-height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  font: inherit;
}
.drawer-close { padding: 0 12px; font-weight: 800; cursor: pointer; }
.menu-search input { width: 100%; padding: 0 12px; box-sizing: border-box; }
.drawer-group { margin: 8px 0 0; font-size: 0.75rem; font-weight: 800; letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted); }
.drawer-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  min-height: 64px;
  padding: 6px 8px;
  border-radius: 16px;
  text-decoration: none;
  color: inherit;
  background: var(--card);
  border: 1px solid var(--line);
}
.drawer-row strong { display: block; font-size: 1.02rem; }
.drawer-row small { display: block; color: var(--muted); font-size: 0.86rem; line-height: 1.3; }
.drawer-ico {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  font-size: 1.35rem;
  background: linear-gradient(145deg, #fff, #ddd6fe);
  box-shadow: 0 0 12px rgba(124, 58, 237, 0.35);
}
.drawer-row.is-hidden { display: none; }

.display-pop {
  position: fixed;
  z-index: 50;
  top: calc(var(--header-h) + 8px);
  right: 10px;
  width: min(320px, calc(100% - 20px));
  padding: 12px;
  border-radius: 16px;
  background: var(--card);
  color: var(--ink);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.display-pop[hidden] { display: none; }
.display-pop p { margin: 0 0 8px; font-weight: 800; }
.font-row, .theme-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.font-row button, .theme-row button {
  min-height: 44px;
  min-width: 44px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.ink-label { display: flex; align-items: center; gap: 8px; font-weight: 700; }

main { padding: 8px 0 12px; }
.wrap { width: min(1100px, calc(100% - 28px)); margin: 0 auto; }
.hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: start;
  padding: 18px 0 8px;
  min-width: 0;
  position: relative;
}
.hero h1, .block h2, .page-title {
  line-height: 1.15;
  margin: 0 0 8px;
}
.hero h1 { font-size: clamp(2rem, 4vw, 3.4rem); }
.lede { font-size: 1.1rem; max-width: 62ch; }
.hero-copy { position: relative; min-width: 0; min-height: 260px; padding-right: 300px; }
.shot-footer { display: flex; justify-content: center; padding: 28px 0 8px; }
.hero-visual {
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
  border-radius: 22px;
  border: 2px solid transparent;
  background:
    linear-gradient(#fff7ed, #fff7ed) padding-box,
    linear-gradient(120deg, #22d3ee, #a78bfa, #f472b6, #fbbf24) border-box;
  box-shadow: 0 16px 40px rgba(49, 46, 129, 0.28), 0 0 28px rgba(34, 211, 238, 0.35);
}
.hero-compact { display: none; }
.hero-visual svg { width: 100%; max-width: 100%; height: auto; display: block; }
.hero-3d { position: absolute; right: 0; top: 0; width: 280px; height: 260px; perspective: 800px; pointer-events: none; z-index: 1; overflow: hidden; contain: paint; }
.hero-3d .obj { position: absolute; transform-style: preserve-3d; animation: pl-rot 14s linear infinite; }
.hero-3d .obj i { position: absolute; inset: 0; border: 2px solid rgba(255, 255, 255, 0.85); opacity: 0.92; }
.hero-3d .o1 { left: 72px; top: 36px; width: 120px; height: 120px; }
.hero-3d .o1 i { box-shadow: 0 0 30px currentColor, inset 0 0 22px rgba(255, 255, 255, 0.5); border-radius: 18px; }
.hero-3d .o1 i:nth-child(1) { transform: translateZ(60px); background: linear-gradient(135deg, #22d3ee, #6366f1); }
.hero-3d .o1 i:nth-child(2) { transform: rotateY(180deg) translateZ(60px); background: linear-gradient(135deg, #f472b6, #f59e0b); }
.hero-3d .o1 i:nth-child(3) { transform: rotateY(90deg) translateZ(60px); background: linear-gradient(135deg, #fde047, #10b981); }
.hero-3d .o1 i:nth-child(4) { transform: rotateY(-90deg) translateZ(60px); background: linear-gradient(135deg, #a78bfa, #ec4899); }
.hero-3d .o1 i:nth-child(5) { transform: rotateX(90deg) translateZ(60px); background: linear-gradient(135deg, #34d399, #0ea5e9); }
.hero-3d .o1 i:nth-child(6) { transform: rotateX(-90deg) translateZ(60px); background: linear-gradient(135deg, #fb923c, #f43f5e); }
.hero-3d .o2 { left: 12px; top: 160px; width: 70px; height: 70px; animation-duration: 9s; animation-direction: reverse; }
.hero-3d .o2 i { border-radius: 50%; background: radial-gradient(circle at 30% 30%, #fff, #ec4899 50%, #7c3aed); box-shadow: 0 0 22px #ec4899; }
.hero-3d .o2 i:nth-child(2) { transform: rotateY(60deg); }
.hero-3d .o2 i:nth-child(3) { transform: rotateY(120deg); }
.hero-3d .o3 { left: 200px; top: 176px; width: 56px; height: 56px; animation-duration: 11s; }
.hero-3d .o3 i { border-radius: 8px; background: linear-gradient(135deg, #fde047, #f97316); box-shadow: 0 0 20px #fde047; }
.hero-3d .o3 i:nth-child(1) { transform: translateZ(28px); }
.hero-3d .o3 i:nth-child(2) { transform: rotateY(90deg) translateZ(28px); }
.hero-3d .o3 i:nth-child(3) { transform: rotateX(90deg) translateZ(28px); }
@keyframes pl-rot { from { transform: rotateX(20deg) rotateY(0); } to { transform: rotateX(380deg) rotateY(360deg); } }
.visual svg, .visual img { width: 100%; height: auto; display: block; }
.actions, .dl-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.btn, .ghost {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border-radius: 12px;
  font-weight: 800;
  text-decoration: none;
}
.btn { background: linear-gradient(120deg, #7c3aed, #db2777); color: #fff; }
.ghost { background: var(--card); color: var(--ink); border: 1px solid var(--line); }
.stats, .card-grid, .track-grid, .dl-grid {
  display: grid;
  gap: 12px;
}
.stats { grid-template-columns: repeat(4, 1fr); margin: 14px 0; }
.stat, .track-card, .card, .dl-card, .block {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}
.stat { padding: 12px; min-height: 84px; }
.stat b { display: block; font-size: 1.6rem; min-width: 3ch; }
.track-grid { grid-template-columns: repeat(3, 1fr); }
.card-grid, .dl-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
.track-card, .card, .dl-card { padding: 14px; text-decoration: none; color: inherit; min-height: 120px; }
.track-card {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  min-width: 0;
  color: #1e1b4b;
  border: 2px solid transparent;
  background:
    linear-gradient(165deg, #fff 10%, color-mix(in srgb, var(--hue, #7c3aed) 28%, #fff)) padding-box,
    linear-gradient(135deg, #fff, var(--hue, #7c3aed), #22d3ee) border-box;
  box-shadow:
    0 14px 28px color-mix(in srgb, var(--hue, #7c3aed) 32%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.85);
  transform: translateY(0);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.track-card:hover, .track-card:focus-visible {
  transform: translateY(-6px);
  box-shadow: 0 18px 36px color-mix(in srgb, var(--hue, #7c3aed) 48%, transparent), 0 0 0 3px #fff, 0 0 22px var(--hue, #7c3aed);
}
.tile-ico {
  flex: none;
  width: 64px;
  height: 64px;
  display: grid;
  place-items: center;
  border-radius: 18px;
  font-size: 1.8rem;
  line-height: 1;
  background: radial-gradient(circle at 30% 25%, #fff, var(--hue, #7c3aed) 72%);
  box-shadow: 0 0 16px var(--hue, #7c3aed), inset 0 0 10px rgba(255, 255, 255, 0.8);
  border: 2px solid #fff;
}
html.motion .tile-ico {
  animation: tile-glow 2.8s ease-in-out infinite;
  transform: perspective(220px) rotateX(14deg) rotateY(-16deg);
}
html.motion .track-card:hover .tile-ico,
html.motion .track-card:focus-visible .tile-ico {
  transform: perspective(220px) rotateX(4deg) rotateY(14deg) translateY(-4px) scale(1.06);
}
@keyframes tile-glow {
  50% { box-shadow: 0 0 22px var(--hue, #7c3aed), 0 0 36px rgba(34, 211, 238, 0.55), inset 0 0 10px #fff; }
}
.tile-copy { min-width: 0; }
.tile-copy h3, .tile-copy p { margin: 0 0 4px; }
html[data-theme="dark"] .track-card,
html[data-theme="neon"] .track-card {
  color: #f8fafc;
  background:
    linear-gradient(165deg, #111827, color-mix(in srgb, var(--hue, #7c3aed) 34%, #111827)) padding-box,
    linear-gradient(135deg, var(--hue, #7c3aed), #22d3ee) border-box;
}
html[data-theme="neon"] .track-card {
  box-shadow:
    0 16px 32px color-mix(in srgb, var(--hue, #22d3ee) 40%, transparent),
    0 0 18px rgba(34, 211, 238, 0.35);
}
.block { padding: 16px; margin: 14px 0; }
.block.is-reading,
.hero.is-reading {
  outline: 3px solid #22d3ee;
  outline-offset: 4px;
  border-radius: 18px;
  box-shadow: 0 0 0 4px #7c3aed, 0 0 28px rgba(34, 211, 238, 0.95), 0 0 48px rgba(244, 114, 182, 0.5);
  background: color-mix(in srgb, #22d3ee 14%, var(--card, #fff));
}
.section-bar { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.section-bar h2 { font-size: 1.35rem; }
.confirm {
  padding: 10px 12px;
  border-radius: 12px;
  background: #fef3c7;
  color: #451a03;
  border: 1px solid #d97706;
}
html[data-theme="dark"] .confirm { background: #451a03; color: #fef3c7; }
.sources-deeper {
  margin: 18px 0;
  padding: 16px 16px 14px;
  border: 2px solid #7c3aed;
  border-radius: 18px;
  background: #f5f3ff;
  color: #1e1b4b;
  box-shadow: 0 8px 24px rgba(76, 29, 149, 0.12);
}
.sources-deeper h2 { margin: 0 0 8px; font-size: 1.2rem; color: #4c1d95; }
.sources-deeper ul { margin: 0; padding-left: 1.2rem; }
.sources-deeper li { margin: 8px 0; }
.sources-deeper a { color: #1e3a8a; font-weight: 800; overflow-wrap: anywhere; }
html[data-theme="dark"] .sources-deeper,
html[data-theme="neon"] .sources-deeper {
  background: #1e1b4b;
  color: #f8fafc;
  border-color: #c4b5fd;
}
html[data-theme="dark"] .sources-deeper h2,
html[data-theme="neon"] .sources-deeper h2 { color: #e9d5ff; }
html[data-theme="dark"] .sources-deeper a,
html[data-theme="neon"] .sources-deeper a { color: #67e8f9; }
.quiz-options { display: grid; gap: 8px; }
.quiz-options button {
  text-align: left;
  min-height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--ink);
  font: inherit;
  padding: 8px 12px;
  cursor: pointer;
}
.quiz-options button.is-right { outline: 3px solid #059669; }
.quiz-options button.is-wrong { outline: 3px solid #e11d48; }
.dl-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 10px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 800;
  font-size: 0.82rem;
  color: #1e1b4b;
  box-shadow: 0 4px 0 rgba(0, 0, 0, 0.08);
}
.dl-svg { background: #a5f3fc; }
.dl-png { background: #fde68a; }
.dl-html { background: #ddd6fe; }
.dl-pdf { background: #fecdd3; }
.dl-json { background: #bbf7d0; }
.dl-docx { background: #bfdbfe; }
.dl-pptx { background: #fed7aa; }
.dl-zip { background: #86efac; }
.visual img { background: #fff7ed; border-radius: 12px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { border-bottom: 1px solid var(--line); text-align: left; padding: 8px; vertical-align: top; }
.kicker { font-weight: 800; color: var(--muted); margin: 0 0 4px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: #ede9fe;
  color: #1e1b4b;
  font-weight: 700;
}
pre {
  overflow: auto;
  padding: 12px;
  border-radius: 12px;
  background: #0f172a;
  color: #e2e8f0;
  font-size: 0.82rem;
}
.tour-layer {
  position: fixed;
  inset: 0;
  z-index: 80;
  pointer-events: none;
}
.tour-layer[hidden] { display: none !important; }
.tour-spot {
  position: fixed;
  z-index: 81;
  border-radius: 16px;
  pointer-events: none;
  box-shadow:
    0 0 0 3px #fde047,
    0 0 18px #c4b5fd,
    0 0 28px rgba(34, 211, 238, 0.85);
}
.tour-card {
  position: fixed;
  z-index: 82;
  pointer-events: auto;
  box-sizing: border-box;
  left: 50%;
  width: min(352px, calc(100vw - 32px));
  max-width: calc(100vw - 32px);
  max-height: calc(100dvh - 36px);
  overflow: auto;
  transform: translateX(-50%);
  padding: 14px 14px 12px;
  border-radius: 22px;
  color: #1b1340;
  background:
    linear-gradient(#fff, #fff) padding-box,
    linear-gradient(120deg, #22d3ee, #a78bfa, #f472b6) border-box;
  border: 3px solid transparent;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.28);
}
.tour-card.is-low { bottom: 24px; top: auto; }
.tour-card.is-high { top: 84px; bottom: auto; }
.tour-kicker {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 6px;
  font-weight: 800;
  color: #5b21b6;
}
.tour-num {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #7c3aed;
  color: #fff;
  box-shadow: 0 0 12px rgba(124, 58, 237, 0.75);
}
.tour-card h2 {
  margin: 0 0 6px;
  font-size: 1.25rem;
  line-height: 1.2;
  color: #1b1340;
}
.tour-text { margin: 0 0 10px; line-height: 1.45; color: #1b1340; }
.tour-dots { display: flex; gap: 6px; margin: 0 0 12px; }
.tour-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #ddd6fe;
}
.tour-dots span.is-on {
  background: #7c3aed;
  box-shadow: 0 0 8px #a78bfa;
}
.tour-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.tour-actions button {
  min-height: 44px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 0;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
  background: #ede9fe;
  color: #3b0764;
}
.tour-actions button[hidden] { display: none; }
.tour-actions button[data-tour-next] {
  background: #7c3aed;
  color: #fff;
  box-shadow: 0 0 16px rgba(124, 58, 237, 0.55);
}
@media (max-width: 800px) {
  .tour-card.is-low { bottom: calc(var(--dock-h, 86px) + 12px); }
  .tour-card.is-high { top: calc(var(--header-h, 56px) + 12px); }
  .tour-card {
    max-height: calc(100dvh - var(--dock-h, 86px) - var(--header-h, 56px) - 28px);
  }
}
.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}
@media (max-width: 800px) {
  .hero, .stats, .track-grid { grid-template-columns: 1fr; }
  .hero-copy { min-height: 0; padding-right: 0; }
  .hero-wide { display: none; }
  .hero-compact { display: block; }
  .hero-3d {
    position: absolute;
    top: auto;
    bottom: 0;
    right: 0;
    width: 250px;
    height: 230px;
    margin: 0;
    transform: scale(0.32);
    transform-origin: bottom right;
  }
  .brand-home { display: none; }
  .menu-btn { padding: 0 8px; }
  .rail-arrow { min-width: 32px; padding: 0 6px; }
  .section-chip { padding: 0 8px; font-size: 0.8rem; }
  .topbar { top: 6px; margin: 6px 8px; padding-right: 8px; gap: 4px; }
}
@media (min-width: 801px) and (max-width: 1100px) {
  .track-grid, .stats { grid-template-columns: 1fr 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  .drawer, .drawer-scrim { transition: none; }
  .hero-3d .obj, .tile-ico, .chip-ico, .dock-ico { animation: none; transform: none; }
  .hero-3d .obj { transform: rotateX(-24deg) rotateY(32deg); }
  .track-card, .track-card:hover { transform: none; }
}
html[data-motion="reduce"] .hero-3d .obj,
html[data-motion="reduce"] .tile-ico,
html[data-motion="reduce"] .chip-ico,
html[data-motion="reduce"] .phone-dock .dock-ico { animation: none; transform: none; }
html[data-motion="reduce"] .hero-3d .obj { transform: rotateX(-24deg) rotateY(32deg); }
html[data-motion="reduce"] .track-card,
html[data-motion="reduce"] .track-card:hover { transform: none; }