:root {
  --ink: #f6efe2;
  --muted: #bda98b;
  --faint: #807361;
  --line: rgba(222, 184, 112, 0.25);
  --gold: #e1b464;
  --rust: #b9653d;
  --green: #7f9f72;
  --blue: #6e9cac;
  --black: #0d0d0b;
  --panel: rgba(24, 22, 18, 0.82);
  --panel-strong: rgba(34, 30, 23, 0.94);
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    radial-gradient(circle at 20% 10%, rgba(177, 101, 61, 0.2), transparent 30rem),
    radial-gradient(circle at 80% 22%, rgba(110, 156, 172, 0.14), transparent 34rem),
    linear-gradient(135deg, #11100d 0%, #1a1510 48%, #0b0b0a 100%);
  background-size: 42px 42px, 42px 42px, auto, auto, auto;
  font-family: "Noto Serif SC", "Songti SC", Georgia, serif;
  min-height: 100vh;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1540px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 18px 0 70px;
}

.topbar {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: center;
  min-height: 70px;
  position: sticky;
  top: 0;
  z-index: 10;
  background: linear-gradient(180deg, rgba(14, 13, 11, 0.96), rgba(14, 13, 11, 0.72));
  backdrop-filter: blur(18px);
}

.brand {
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 46px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  color: var(--gold);
  background: rgba(225, 180, 100, 0.08);
  font-size: 22px;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 20px;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.nav-tabs {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  overflow-x: auto;
}

.nav-tab,
.toolbar-buttons button {
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(24, 22, 18, 0.64);
  min-height: 38px;
  padding: 0 14px;
}

.nav-tab.active {
  background: #e1b464;
  color: #1a1208;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 430px;
  gap: 34px;
  align-items: end;
  padding: 62px 0 28px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 10px;
  color: var(--gold);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 950px;
  margin-bottom: 20px;
  font-size: clamp(42px, 6.2vw, 96px);
  line-height: 0.96;
}

.intro {
  max-width: 860px;
  color: #d9c8a9;
  font-size: clamp(17px, 1.8vw, 22px);
  line-height: 1.75;
}

.hero-board {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.board-cell {
  min-height: 135px;
  padding: 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.board-cell:nth-child(2n) {
  border-right: 0;
}

.board-cell:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.board-cell b {
  display: block;
  font-size: 26px;
  color: var(--gold);
}

.board-cell span {
  color: var(--muted);
}

.board-cell.hot {
  background: rgba(185, 101, 61, 0.18);
}

.atlas-grid {
  display: grid;
  grid-template-columns: 1.45fr repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 18px;
}

.system-card,
.symbol-profile,
.visual-culture,
.system-model {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.system-card {
  padding: 22px;
  min-height: 260px;
}

.system-card.large {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 24px;
  align-items: center;
}

.system-card h2 {
  font-size: 38px;
  margin-bottom: 12px;
}

.system-card h3 {
  font-size: 25px;
  margin-bottom: 12px;
}

.system-card p {
  color: #d3c1a2;
  line-height: 1.7;
}

.snake-mark {
  width: 178px;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  background: radial-gradient(circle, rgba(225, 180, 100, 0.18), rgba(185, 101, 61, 0.04));
}

.snake-mark svg,
.image-variant svg {
  width: 86%;
  height: 86%;
  overflow: visible;
}

.snake-mark path,
.snake-mark circle,
.image-variant path,
.image-variant circle {
  fill: none;
  stroke: var(--gold);
  stroke-width: 7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.snake-mark path:not(.snake-line),
.image-variant path:not(:first-child),
.image-variant circle {
  fill: rgba(225, 180, 100, 0.18);
}

.snake-mark .thin {
  stroke: #cf7c4d;
  stroke-width: 5;
}

.symbol-profile,
.visual-culture,
.system-model {
  margin-top: 18px;
  padding: 26px;
}

.profile-header {
  max-width: 900px;
  margin-bottom: 20px;
}

.profile-header h2,
.system-model h2 {
  font-size: clamp(34px, 4vw, 60px);
  margin-bottom: 10px;
}

.profile-header p:not(.eyebrow) {
  color: #d3c1a2;
  font-size: 18px;
  line-height: 1.65;
}

.profile-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr) 330px;
  gap: 14px;
}

.phase-list,
.thread-stage,
.evidence-card {
  border: 1px solid var(--line);
  background: rgba(10, 10, 8, 0.36);
}

.phase-list {
  display: grid;
  gap: 8px;
  padding: 12px;
}

.phase-item {
  width: 100%;
  text-align: left;
  border: 1px solid rgba(222, 184, 112, 0.16);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.035);
  padding: 13px;
}

.phase-item.active {
  border-color: rgba(225, 180, 100, 0.8);
  background: rgba(225, 180, 100, 0.12);
}

.phase-item span {
  color: var(--gold);
  font-size: 12px;
}

.phase-item b,
.phase-item small {
  display: block;
}

.phase-item b {
  font-size: 17px;
  margin: 4px 0;
}

.phase-item small {
  color: var(--muted);
  line-height: 1.4;
}

.thread-stage {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 650px;
}

.map-toolbar {
  min-height: 54px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  color: var(--gold);
}

.toolbar-buttons {
  display: flex;
  gap: 8px;
}

.toolbar-buttons button {
  width: 38px;
  padding: 0;
  font-size: 24px;
}

.world-map svg {
  display: block;
  width: 100%;
  min-height: 430px;
}

.land {
  fill: url(#landGlow);
  stroke: rgba(230, 204, 150, 0.2);
}

.route {
  fill: none;
  stroke: var(--gold);
  stroke-width: 2.8;
  stroke-dasharray: 8 10;
  filter: drop-shadow(0 0 10px rgba(225, 180, 100, 0.55));
}

.map-node circle.outer {
  fill: rgba(225, 180, 100, 0.13);
  stroke: rgba(225, 180, 100, 0.42);
}

.map-node circle.inner {
  fill: var(--gold);
}

.map-node.active circle.outer {
  fill: rgba(185, 101, 61, 0.25);
  stroke: rgba(255, 160, 112, 0.9);
}

.map-label {
  fill: var(--ink);
  font-size: 13px;
  paint-order: stroke;
  stroke: rgba(10, 10, 8, 0.9);
  stroke-width: 4px;
}

.belief-panel {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 18px;
  border-top: 1px solid var(--line);
  padding: 18px;
}

.belief-panel h3 {
  font-size: 26px;
}

.belief-panel p {
  color: #d3c1a2;
  line-height: 1.75;
  margin-bottom: 0;
}

.evidence-card {
  padding: 20px;
}

.image-variant {
  height: 230px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  border: 1px solid rgba(222, 184, 112, 0.18);
  background: radial-gradient(circle, rgba(225, 180, 100, 0.14), rgba(255, 255, 255, 0.02));
}

.evidence-card h3 {
  font-size: 28px;
  color: var(--gold);
}

.evidence-card p {
  color: #d3c1a2;
  line-height: 1.7;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-cloud span {
  border: 1px solid rgba(222, 184, 112, 0.24);
  color: var(--muted);
  padding: 7px 9px;
  font-size: 12px;
}

.compact-head {
  margin-bottom: 18px;
}

.culture-grid,
.model-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.culture-card,
.model-grid article {
  border: 1px solid rgba(222, 184, 112, 0.18);
  background: rgba(255, 255, 255, 0.035);
  padding: 18px;
  min-height: 150px;
}

.culture-card b,
.model-grid b {
  display: block;
  color: var(--gold);
  font-size: 22px;
  margin-bottom: 10px;
}

.culture-card p,
.model-grid span {
  display: block;
  color: var(--muted);
  line-height: 1.65;
}

@media (max-width: 1180px) {
  .hero,
  .atlas-grid,
  .profile-layout,
  .belief-panel,
  .culture-grid,
  .model-grid {
    grid-template-columns: 1fr;
  }

  .nav-tabs {
    justify-content: flex-start;
  }

  .system-card.large {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100vw - 20px, 1540px);
  }

  .topbar {
    grid-template-columns: 1fr;
    position: static;
  }

  h1 {
    font-size: 42px;
  }

  .hero-board {
    grid-template-columns: 1fr;
  }

  .board-cell,
  .board-cell:nth-child(2n),
  .board-cell:nth-last-child(-n + 2) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .thread-stage {
    min-height: auto;
  }
}