/* Civilization OS Infinity · 文明操作系统 · 无穷
   Canonical Psy brand · planetary-cognition dashboard aesthetic
   Cabin Condensed (display) · Inter (body) · JetBrains Mono (mono) · Noto Sans SC for Chinese */

:root {
  --bg: #06070d;
  --bg-deep: #04050a;
  --surface: #0e1018;
  --surface-2: #16181f;
  --surface-3: #1f2230;
  --border: rgba(250, 250, 250, 0.10);
  --border-strong: rgba(250, 250, 250, 0.22);

  --ink: #fafafa;
  --ink-dim: #a3a3ab;
  --ink-mute: #6e6e78;

  --primary: #61f5b3;            /* canonical Psy mint */
  --primary-soft: rgba(97, 245, 179, 0.12);
  --primary-glow: rgba(97, 245, 179, 0.28);

  /* Layer color codes */
  --energy:  #ff7a59;            /* L1 energy */
  --info:    #5fd9ff;            /* L2 information */
  --mind:    #9a6bff;            /* L3 cognition */
  --social:  #d4a017;            /* L4 social coordination */
  --geo:     #6dd49a;            /* L5 geography */
  --tech:    #4d7cff;            /* L6 technology */
  --capital: #d8b665;            /* L7 economy */
  --psy:     var(--primary);     /* L8 Psy */
  --ai:      #d65aaa;            /* L9 AI */
  --reality: #b292e8;            /* L10 consciousness */
  --war:     #c44a4a;            /* L11 warfare */
  --future:  #5fd9ff;            /* L12 future */

  --shadow:    0 28px 64px rgba(0, 0, 0, 0.65);
  --shadow-lg: 0 48px 96px rgba(0, 0, 0, 0.7);

  --radius: 4px;
  --radius-lg: 14px;
  --maxw: 1320px;

  --display: "Cabin Condensed", system-ui, sans-serif;
  --body:    "Inter", "Noto Sans SC", system-ui, sans-serif;
  --mono:    "JetBrains Mono", ui-monospace, monospace;
}

html[data-theme="light"] {
  --bg: #f7f7fb;
  --bg-deep: #ffffff;
  --surface: #ffffff;
  --surface-2: #f0f0f5;
  --surface-3: #e0e0e8;
  --border: rgba(10, 10, 12, 0.13);
  --border-strong: rgba(10, 10, 12, 0.30);
  --ink: #0a0a0c;
  --ink-dim: #4f5260;
  --ink-mute: #777a85;
  --primary: #00b87b;
  --primary-soft: rgba(0, 184, 123, 0.10);
  --primary-glow: rgba(0, 184, 123, 0.20);
  --shadow: 0 18px 44px rgba(10, 10, 12, 0.10);
  --shadow-lg: 0 32px 64px rgba(10, 10, 12, 0.12);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

html[data-lang="en"] [lang="zh"] { display: none !important; }
html[data-lang="zh"] [lang="en"] { display: none !important; }

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

::selection { background: var(--primary-soft); color: var(--ink); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

/* ─── Topbar ─────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: saturate(140%) blur(18px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 18px; height: 68px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--display); font-size: 21px; letter-spacing: 0;
  color: var(--ink); font-weight: 600;
}
.brand-mark {
  width: 30px; height: 30px; flex: 0 0 auto;
  background: var(--primary);
  border-radius: 6px;
  display: grid; place-items: center;
  color: var(--bg);
  box-shadow: 0 0 14px var(--primary-glow);
}
.brand-mark svg { width: 64%; height: 64%; display: block; fill: currentColor; }
.brand small {
  font-family: var(--mono); font-size: 10.5px; color: var(--ink-mute);
  letter-spacing: 0.16em; text-transform: uppercase;
  margin-left: 4px;
}
.nav { display: flex; gap: 14px; align-items: center; }
.nav a {
  color: var(--ink-dim); font-family: var(--mono); font-size: 11px;
  letter-spacing: 0.04em;
}
.nav a:hover { color: var(--ink); text-decoration: none; }

.controls { display: flex; gap: 8px; align-items: center; }
.lang-toggle, .theme-toggle {
  display: inline-flex; border: 1px solid var(--border-strong);
  border-radius: 999px; overflow: hidden; background: var(--surface);
}
.lang-toggle button, .theme-toggle button {
  font-family: var(--mono); font-size: 11.5px;
  background: transparent; color: var(--ink-dim); border: 0;
  padding: 6px 12px; cursor: pointer;
}
.lang-toggle button.active, .theme-toggle button.active {
  background: var(--ink); color: var(--bg);
}

@media (max-width: 1240px) { .nav { display: none; } }

/* ─── Hero (cosmic master equation) ─────────────────────────── */
.hero {
  padding: 130px 0 100px;
  border-bottom: 1px solid var(--border);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(50% 60% at 75% 25%, var(--primary-glow), transparent 60%),
    radial-gradient(45% 60% at 22% 75%, rgba(154,107,255,0.12), transparent 60%),
    radial-gradient(40% 50% at 55% 95%, rgba(95,217,255,0.10), transparent 60%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(250,250,250,0.05) 1px, transparent 0);
  background-size: 32px 32px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 70% at center, black 30%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at center, black 30%, transparent 90%);
}
.hero-inner { position: relative; }
.hero-eyebrow {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.18em;
  color: var(--primary); margin-bottom: 28px;
  text-transform: uppercase;
}
.hero h1 {
  font-family: var(--display); font-weight: 600;
  font-size: clamp(52px, 8.4vw, 124px);
  line-height: 0.96; letter-spacing: -0.03em;
  margin: 0 0 28px; color: var(--ink);
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--primary) 0%, #5fd9ff 40%, #9a6bff 80%, #d65aaa 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub {
  font-size: 19px; color: var(--ink-dim); max-width: 820px;
  margin: 0 0 40px; line-height: 1.6;
}
.hero-cta {
  display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 56px;
}
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 12px 22px; border-radius: 999px;
  font-family: var(--mono); font-size: 13px; letter-spacing: 0.02em;
  text-decoration: none; cursor: pointer; border: 0;
  transition: transform 0.16s, background 0.16s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: var(--bg); }
.btn-primary:hover { background: var(--ink); color: var(--bg); }
.btn-ghost {
  background: transparent; color: var(--ink-dim);
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { color: var(--ink); border-color: var(--ink-dim); }

/* Master Equation visualization */
.equation-card {
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow);
}
.equation-svg-wrap { width: 100%; overflow: hidden; border-radius: 10px; }
.equation-svg { width: 100%; height: auto; display: block; }
.equation-caption {
  font-family: var(--mono); font-size: 12px;
  color: var(--ink-mute); margin-top: 18px; text-align: center;
  letter-spacing: 0.04em;
}

.hero-meta {
  display: flex; flex-wrap: wrap; gap: 36px;
  font-family: var(--mono); font-size: 11.5px;
  color: var(--ink-mute); border-top: 1px solid var(--border);
  padding-top: 26px; margin-top: 56px;
}
.hero-meta div { display: flex; flex-direction: column; gap: 4px; }
.hero-meta div span:first-child {
  font-family: var(--display); font-size: 22px; font-weight: 600;
  color: var(--ink);
}

/* ─── Layer section ─────────────────────────────── */
section.layer {
  padding: 120px 0; border-bottom: 1px solid var(--border);
  position: relative;
}
.layer-head {
  display: grid; grid-template-columns: 280px 1fr; gap: 48px;
  margin-bottom: 50px; align-items: start;
}
.layer-num {
  font-family: var(--display); font-weight: 600;
  font-size: 90px; line-height: 1; letter-spacing: -0.06em;
  color: var(--accent, var(--primary)); opacity: 0.7;
}
.layer-num small {
  display: block;
  font-family: var(--mono); font-size: 11px; font-weight: 400;
  color: var(--ink-mute); letter-spacing: 0.14em;
  margin-top: 10px;
}
.layer-head h2 {
  font-family: var(--display); font-weight: 600;
  font-size: clamp(36px, 5vw, 64px); margin: 0;
  line-height: 1.04; color: var(--ink); letter-spacing: -0.025em;
}
.layer-lede {
  margin-top: 22px; color: var(--ink-dim); max-width: 820px;
  font-size: 17px; line-height: 1.65;
}
@media (max-width: 760px) {
  .layer-head { grid-template-columns: 1fr; gap: 12px; }
  .layer-num { font-size: 60px; }
}

/* Layer accent assignments */
section.layer.l1 { --accent: var(--energy); }
section.layer.l2 { --accent: var(--info); }
section.layer.l3 { --accent: var(--mind); }
section.layer.l4 { --accent: var(--social); }
section.layer.l5 { --accent: var(--geo); }
section.layer.l6 { --accent: var(--tech); }
section.layer.l7 { --accent: var(--capital); }
section.layer.l8 { --accent: var(--psy); }
section.layer.l9 { --accent: var(--ai); }
section.layer.l10 { --accent: var(--reality); }
section.layer.l11 { --accent: var(--war); }
section.layer.l12 { --accent: var(--future); }

/* ─── Architecture / Psy diagram ─────────────────────────────── */
.arch-card {
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  box-shadow: var(--shadow);
}
.arch-svg-wrap { width: 100%; overflow: hidden; border-radius: 10px; }
.arch-svg { width: 100%; height: auto; display: block; }

/* ─── Cards ─────────────────────────────── */
.card-row {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 20px;
}
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  position: relative; overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.card::before {
  content: ""; position: absolute; left: 0; top: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent, var(--primary)), transparent);
  opacity: 0.6;
}
.card .kicker {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em;
  color: var(--accent, var(--primary)); margin-bottom: 14px;
}
.card h3 {
  font-family: var(--display); font-weight: 600; font-size: 23px;
  margin: 0 0 12px; color: var(--ink); line-height: 1.2;
}
.card p { color: var(--ink-dim); font-size: 14.5px; line-height: 1.7; margin: 0 0 8px; }

/* ─── Bar chart row ─────────────────────────────── */
.bars-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
}
.bar-row {
  display: grid; grid-template-columns: 220px 1fr 100px;
  gap: 14px; align-items: center; margin-bottom: 14px;
  font-family: var(--mono); font-size: 12px; color: var(--ink-dim);
}
.bar-row .label .swatch {
  display: inline-block; width: 8px; height: 8px; border-radius: 2px;
  margin-right: 8px; vertical-align: middle;
}
.bar-row .meter {
  height: 12px; border-radius: 4px;
  background: var(--surface-2); position: relative; overflow: hidden;
}
.bar-row .meter > i {
  position: absolute; left: 0; top: 0; bottom: 0;
  background: var(--bar-color, var(--primary));
}
.bar-row .v {
  font-family: var(--display); font-size: 17px; color: var(--ink); text-align: right;
}

/* ─── Comparison table ─────────────────────────────── */
.comp-table {
  width: 100%; border-collapse: collapse; font-size: 14.5px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg); overflow: hidden;
}
.comp-table th, .comp-table td {
  text-align: left; padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.comp-table th {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.10em;
  color: var(--accent, var(--primary));
  background: var(--surface-2);
  text-transform: uppercase;
}
.comp-table tr:last-child td { border-bottom: 0; }
.comp-table td:first-child { color: var(--ink); font-family: var(--display); font-size: 17px; font-weight: 600; }

/* ─── Future scenario generator ─────────────────────────────── */
.scenario-shell {
  display: grid; grid-template-columns: 340px 1fr; gap: 28px;
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px;
  box-shadow: var(--shadow);
}
@media (max-width: 920px) { .scenario-shell { grid-template-columns: 1fr; } }
.scenario-shell h3 {
  font-family: var(--display); font-weight: 600; font-size: 22px;
  margin: 0 0 18px;
}
.scenario-controls label {
  display: block; font-family: var(--mono); font-size: 10.5px;
  letter-spacing: 0.10em; color: var(--ink-mute);
  margin-bottom: 6px; margin-top: 16px; text-transform: uppercase;
}
.scenario-controls select, .scenario-controls input[type="range"] {
  width: 100%;
  background: var(--surface-2); color: var(--ink);
  border: 1px solid var(--border-strong); border-radius: 6px;
  padding: 9px 12px; font-family: var(--mono); font-size: 13px;
}
.scenario-controls button.gen-btn {
  width: 100%; margin-top: 18px;
  background: var(--primary); color: var(--bg); border: 0;
  padding: 12px; border-radius: 8px;
  font-family: var(--mono); font-size: 12px; font-weight: 700;
  letter-spacing: 0.06em; text-transform: uppercase;
  cursor: pointer; transition: background 0.16s;
}
.scenario-controls button.gen-btn:hover { background: var(--ink); }

.scenario-output { display: flex; flex-direction: column; gap: 14px; }
.scenario-output .sbar {
  display: grid; grid-template-columns: 220px 1fr 60px;
  gap: 12px; align-items: center;
  font-family: var(--mono); font-size: 12px; color: var(--ink-dim);
}
.scenario-output .sbar .meter {
  height: 9px; border-radius: 4px;
  background: var(--surface-2); position: relative; overflow: hidden;
}
.scenario-output .sbar .meter > i {
  position: absolute; left: 0; top: 0; bottom: 0;
  background: linear-gradient(90deg, var(--info), var(--mind), var(--primary));
  transition: width 0.4s;
}
.scenario-output .sbar .v { color: var(--ink); text-align: right; font-family: var(--display); font-size: 17px; font-weight: 600; }
.scenario-narrative {
  font-family: var(--body); font-size: 14.5px; color: var(--ink-dim);
  border: 1px dashed var(--border-strong);
  border-radius: 8px; padding: 16px 18px; margin-top: 8px;
  line-height: 1.7;
}
.scenario-narrative strong { color: var(--ink); }

/* ─── Warfare matrix ─────────────────────────────── */
.warfare-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
}
.war-cell {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 24px;
  border-left: 3px solid var(--war);
}
.war-cell .era {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em;
  color: var(--war); margin-bottom: 8px; text-transform: uppercase;
}
.war-cell h4 {
  font-family: var(--display); font-weight: 600; font-size: 22px;
  margin: 0 0 8px; color: var(--ink); line-height: 1.2;
}
.war-cell p { color: var(--ink-dim); font-size: 14px; line-height: 1.6; margin: 0; }

/* ─── AI ─────────────────────────────── */
.ai-shell {
  background: linear-gradient(180deg, var(--surface) 0%, var(--surface-2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px;
  box-shadow: var(--shadow);
}
.ai-prompts { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.ai-prompt {
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.02em;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: 999px; padding: 9px 16px; color: var(--ink-dim);
  cursor: pointer; transition: all 0.16s;
}
.ai-prompt:hover { color: var(--ink); border-color: var(--primary); }
.ai-input-row { display: flex; gap: 10px; }
.ai-input-row input {
  flex: 1; background: var(--surface-2); color: var(--ink);
  border: 1px solid var(--border-strong); border-radius: 8px;
  padding: 13px 16px; font-family: var(--body); font-size: 14.5px;
}
.ai-input-row button {
  background: var(--primary); color: var(--bg); border: 0;
  padding: 13px 24px; font-family: var(--mono); font-size: 12px;
  letter-spacing: 0.02em;
  border-radius: 8px; cursor: pointer; font-weight: 700;
}
.ai-input-row button:hover { background: var(--ink); color: var(--bg); }
.ai-output {
  margin-top: 22px; min-height: 80px;
  font-size: 15.5px; line-height: 1.78; color: var(--ink-dim);
  border-top: 1px solid var(--border); padding-top: 20px;
}
.ai-output strong { color: var(--ink); }
.ai-output em {
  font-style: normal; color: var(--primary); font-family: var(--mono);
  font-size: 12.5px; letter-spacing: 0.04em;
}
.ai-output p { margin: 0 0 14px; }

/* ─── Guardrails ─────────────────────────────── */
.guardrails {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 30px;
  border-left: 3px solid var(--war);
}
.guardrails h3 { font-family: var(--display); font-weight: 600; margin: 0 0 14px; font-size: 22px; }
.guardrails ul { margin: 0; padding-left: 22px; }
.guardrails li { color: var(--ink-dim); margin-bottom: 12px; font-size: 14.5px; line-height: 1.7; }

/* ─── Footer ─────────────────────────────── */
footer {
  padding: 80px 0 60px;
  font-family: var(--mono); font-size: 12px; color: var(--ink-mute);
  letter-spacing: 0.02em;
}
footer a { color: var(--ink-dim); }
footer a:hover { color: var(--ink); }
footer .foot-row {
  display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap;
}
footer .links { display: flex; gap: 22px; flex-wrap: wrap; }

/* ─── Subtle motion ─────────────────────────────── */
@keyframes flow {
  0%   { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: -120; }
}
.flow-line {
  stroke-dasharray: 6 6;
  animation: flow 8s linear infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}
.pulse-node {
  animation: pulse 2.4s ease-in-out infinite;
}
@media (prefers-reduced-motion: reduce) {
  .flow-line, .pulse-node { animation: none; }
}

/* ─── Util ─────────────────────────────── */
.mono { font-family: var(--mono); }
.dim  { color: var(--ink-dim); }