/* Techne — technical-philosophical · cosmos default */
:root {
  /* dark (default) — cosmos */
  --bg: #0b1018;
  --bg-deep: #060912;
  --bg-elev: #14192b;
  --surface: #1a2138;
  --surface-2: #232b46;
  --paper: #ece7dc;
  --ink: #ece7dc;
  --ink-soft: #b6ad97;
  --ink-mute: #6e7388;
  --hairline: #ece7dc0e;
  --hairline-strong: #ece7dc20;
  --rule: #ece7dc34;
  --aqua: #4cd0b8;          /* tech-electric */
  --aqua-deep: #2a9c87;
  --copper: #d49150;        /* energy */
  --copper-deep: #a86e30;
  --indigo: #6c7ad8;        /* intelligence */
  --indigo-deep: #4c5aaa;
  --crimson: #d4546a;
  --shadow: 0 1px 0 #ece7dc05 inset, 0 12px 40px #0008;
  --max: 1320px;
  --font-display: "Marcellus SC", "Marcellus", "Source Han Serif SC", serif;
  --font-display-i: "Marcellus", serif;
  --font-body: "Outfit", "PingFang SC", "Hiragino Sans GB", system-ui, sans-serif;
  --font-mono: "Fira Code", ui-monospace, monospace;
}

html[data-theme="light"] {
  --bg: #f0eee5;
  --bg-deep: #e3e0d4;
  --bg-elev: #f8f5ea;
  --surface: #fffdf2;
  --surface-2: #f1eddc;
  --paper: #0b1018;
  --ink: #0b1018;
  --ink-soft: #4a4d5a;
  --ink-mute: #8a8d97;
  --hairline: #0b101810;
  --hairline-strong: #0b101824;
  --rule: #0b10183a;
  --aqua: #2a9c87;
  --aqua-deep: #1c7560;
  --copper: #a86e30;
  --copper-deep: #855420;
  --indigo: #4c5aaa;
  --indigo-deep: #344080;
  --crimson: #a83a4c;
  --shadow: 0 1px 0 #fff inset, 0 8px 28px #0b101814;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16.5px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "kern";
  transition: background .25s, color .25s;
}

a { color: var(--aqua); text-decoration: none; border-bottom: 1px solid var(--rule); transition: color .15s, border-color .15s; }
a:hover { color: var(--copper); border-bottom-color: var(--copper); }

.container { max-width: var(--max); margin: 0 auto; padding: 0 36px; }

/* ----- Topbar ----- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 1px solid var(--hairline-strong);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 36px; max-width: var(--max); margin: 0 auto; gap: 16px;
}
.brand {
  display: flex; align-items: baseline; gap: 12px;
  font-family: var(--font-display); font-weight: 400;
  font-size: 26px; letter-spacing: .04em; line-height: 1;
  color: var(--ink); border: 0;
}
.brand .gk {
  font-family: var(--font-display-i); font-style: italic;
  font-size: 22px; color: var(--aqua); letter-spacing: 0;
}
.nav { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.nav a {
  font-size: 12px; color: var(--ink-soft); border: 0;
  font-weight: 500; font-family: var(--font-mono);
  letter-spacing: .02em;
}
.nav a:hover { color: var(--aqua); }

.toolbar { display: flex; gap: 10px; align-items: center; }
.lang-toggle, .theme-toggle {
  display: inline-flex; border: 1px solid var(--hairline-strong);
  overflow: hidden; background: var(--surface);
}
.lang-toggle button, .theme-toggle button {
  background: transparent; border: 0; color: var(--ink-soft);
  padding: 6px 12px; cursor: pointer; font: inherit;
  letter-spacing: .04em;
  font-family: var(--font-mono); font-size: 11px;
}
.lang-toggle button.active, .theme-toggle button.active {
  background: var(--ink); color: var(--bg);
}

/* ----- Hero ----- */
.hero {
  padding: 100px 0 80px;
  position: relative; overflow: hidden;
  border-bottom: 1px solid var(--hairline-strong);
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse at 80% 0%, color-mix(in srgb, var(--aqua) 15%, transparent) 0%, transparent 50%),
    radial-gradient(ellipse at 0% 70%, color-mix(in srgb, var(--indigo) 14%, transparent) 0%, transparent 50%);
}

.hero-marker {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em;
  color: var(--aqua); text-transform: uppercase; margin-bottom: 28px;
  display: flex; align-items: center; gap: 12px; position: relative;
}
.hero-marker::before { content: ""; width: 24px; height: 1px; background: var(--aqua); }
.hero-marker::after  { content: ""; flex: 1; height: 1px; background: var(--hairline-strong); max-width: 320px; }

.hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(44px, 6.5vw, 92px);
  line-height: 1.0;
  letter-spacing: .02em;
  margin: 0 0 32px;
  position: relative;
  text-transform: none;
}
.hero h1 .greek {
  font-family: var(--font-display-i); font-style: italic;
  color: var(--aqua); letter-spacing: 0; font-weight: 400;
}
.hero h1 em { font-style: italic; color: var(--copper); font-family: var(--font-display-i); letter-spacing: 0; }

.hero-thesis {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
  margin: 56px 0;
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  padding: 30px 0; position: relative;
}
.hero-thesis .label {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em;
  color: var(--ink-mute); text-transform: uppercase; margin-bottom: 14px;
}
.hero-thesis blockquote {
  margin: 0;
  font-family: var(--font-display-i); font-style: italic; font-weight: 400;
  font-size: 22px; line-height: 1.4; color: var(--ink);
  letter-spacing: 0;
}
.hero-thesis blockquote em { font-style: normal; color: var(--aqua); }
.hero-thesis blockquote b { color: var(--copper); font-weight: 400; }

.hero-formula {
  font-family: var(--font-mono); font-size: 14px; line-height: 1.85;
  color: var(--ink); letter-spacing: 0;
}
.hero-formula b { color: var(--aqua); font-weight: 600; }
.hero-formula .ops { color: var(--copper); font-weight: 700; }
.hero-formula em { color: var(--indigo); font-style: normal; }

.hero-lede {
  font-size: 19px; line-height: 1.65; color: var(--ink-soft);
  max-width: 760px; margin: 0 0 36px; position: relative;
}

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 56px; position: relative; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 26px;
  font: inherit; font-size: 13px; font-weight: 500;
  cursor: pointer; transition: all .15s;
  font-family: var(--font-mono); letter-spacing: .06em;
  text-transform: uppercase; border: 1px solid var(--ink);
}
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { background: var(--aqua); border-color: var(--aqua); color: var(--bg); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--bg); }
a.btn { border-style: solid; }

/* Hero capability schema */
.schema-wrap {
  border: 1px solid var(--rule); padding: 32px;
  background: var(--surface); position: relative;
}
.schema-head {
  display: flex; justify-content: space-between; align-items: end;
  border-bottom: 1px solid var(--hairline-strong); padding-bottom: 14px; margin-bottom: 24px;
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em;
  text-transform: uppercase;
}
.schema-head .id { color: var(--aqua); }
.schema-head .ttl { color: var(--ink); font-weight: 500; font-family: var(--font-display-i); font-style: italic; font-size: 18px; letter-spacing: 0; text-transform: none; }
.schema-head .rev { color: var(--ink-mute); }
.schema-svg { width: 100%; aspect-ratio: 2.4; max-height: 360px; }

/* ----- Section ----- */
.section { padding: 110px 0; border-bottom: 1px solid var(--rule); position: relative; }
.section.alt { background: var(--bg-elev); }

.section-head {
  display: grid; grid-template-columns: 280px 1fr; gap: 60px;
  margin-bottom: 56px; align-items: start;
}
.section-num {
  font-family: var(--font-mono); font-size: 12px; color: var(--ink-mute);
  letter-spacing: .14em; font-weight: 500;
  border-top: 1px solid var(--ink); padding-top: 16px;
}
.section-num .big {
  font-family: var(--font-display-i); font-style: italic; font-size: 56px;
  font-weight: 400; color: var(--aqua); line-height: 1;
  display: block; margin-top: 12px; letter-spacing: 0;
}
.section-num .desc {
  display: block; color: var(--ink-mute); margin-top: 14px;
  font-weight: 400; letter-spacing: .04em; line-height: 1.55;
  font-family: var(--font-body); font-size: 13.5px;
}
.section-title {
  font-family: var(--font-display); font-weight: 400;
  font-size: clamp(32px, 4.5vw, 64px); line-height: 1.05;
  letter-spacing: .015em; margin: 0 0 18px;
}
.section-title em { font-style: italic; color: var(--aqua); font-family: var(--font-display-i); letter-spacing: 0; }
.section-title .alt { font-style: italic; color: var(--copper); font-family: var(--font-display-i); letter-spacing: 0; }
.section-lede {
  font-size: 18px; color: var(--ink-soft); max-width: 720px; line-height: 1.65;
}
.section-lede em { color: var(--ink); font-style: italic; font-family: var(--font-display-i); }

/* ----- Module 1 — What Is Technology ----- */
.def-shell { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--rule); }
.def-cell {
  background: var(--surface); padding: 40px;
  border-right: 1px solid var(--rule);
}
.def-cell:last-child { border-right: 0; }
.def-cell .label {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em;
  color: var(--aqua); text-transform: uppercase; font-weight: 600; margin-bottom: 16px;
}
.def-cell h4 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 32px; margin: 0 0 12px; letter-spacing: 0; line-height: 1.05; }
.def-cell h4 em { font-style: normal; color: var(--aqua); }
.def-cell > p { color: var(--ink-soft); font-size: 16px; margin: 0 0 18px; line-height: 1.7; }
.def-cell > p em { color: var(--ink); font-style: italic; font-family: var(--font-display-i); }

.formula-card {
  background: var(--bg-deep); border: 1px solid var(--hairline-strong);
  padding: 24px 28px; font-family: var(--font-mono); font-size: 14px;
  line-height: 1.9; margin-top: 22px;
}
.formula-card .lhs { color: var(--aqua); font-weight: 600; }
.formula-card .ops { color: var(--copper); font-weight: 700; padding: 0 4px; }
.formula-card .term { color: var(--ink); }
.formula-card .gloss { color: var(--ink-mute); font-size: 12px; padding-left: 24px; display: block; }

.examples-list { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 22px; }
.example {
  background: var(--bg-deep); border: 1px solid var(--hairline-strong); padding: 20px;
  border-left: 3px solid var(--aqua);
}
.example:nth-child(2) { border-left-color: var(--copper); }
.example:nth-child(3) { border-left-color: var(--indigo); }
.example:nth-child(4) { border-left-color: var(--crimson); }
.example .glyph {
  font-family: var(--font-display-i); font-style: italic; font-size: 28px;
  color: var(--aqua); line-height: 1; margin-bottom: 10px;
}
.example:nth-child(2) .glyph { color: var(--copper); }
.example:nth-child(3) .glyph { color: var(--indigo); }
.example:nth-child(4) .glyph { color: var(--crimson); }
.example h5 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 22px; margin: 0 0 8px; letter-spacing: 0; line-height: 1.2; }
.example p { color: var(--ink-soft); font-size: 13.5px; margin: 0; line-height: 1.6; }
.example p em { color: var(--ink); font-style: italic; }

/* ----- Module 2 — Capability Expansion ----- */
.cap-shell { display: grid; grid-template-columns: 1.4fr 1fr; gap: 48px; align-items: start; }
.cap-card { border: 1px solid var(--rule); background: var(--surface); padding: 36px; box-shadow: var(--shadow); }
.cap-card h3 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 28px; margin: 0 0 6px; letter-spacing: 0; }
.cap-card .sub { font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute); letter-spacing: .12em; margin-bottom: 22px; text-transform: uppercase; }
.cap-svg { width: 100%; aspect-ratio: 1.5; }

.cap-list { display: flex; flex-direction: column; gap: 14px; }
.cap-row {
  display: grid; grid-template-columns: 1fr 24px 1fr; gap: 14px; align-items: center;
  border: 1px solid var(--rule); padding: 18px 22px; background: var(--surface);
}
.cap-row .from { color: var(--ink-soft); font-family: var(--font-display-i); font-style: italic; font-size: 18px; }
.cap-row .arrow {
  font-family: var(--font-display-i); font-style: italic; font-size: 22px;
  color: var(--aqua); text-align: center; line-height: 1;
}
.cap-row .to { color: var(--ink); font-family: var(--font-display-i); font-style: italic; font-size: 19px; font-weight: 400; }
.cap-row .span {
  grid-column: 1 / -1; font-family: var(--font-mono); font-size: 11px;
  color: var(--ink-mute); letter-spacing: .04em; padding-top: 8px;
  margin-top: 8px; border-top: 1px dashed var(--hairline-strong);
}

/* ----- Module 3 — Energy ----- */
.energy-card { border: 1px solid var(--rule); background: var(--surface); padding: 36px; }
.energy-head { display: flex; justify-content: space-between; align-items: end; margin-bottom: 24px; padding-bottom: 14px; border-bottom: 1px solid var(--hairline-strong); }
.energy-head h3 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 28px; margin: 0; letter-spacing: 0; }
.energy-head .meta { font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute); letter-spacing: .04em; }

.energy-ladder { display: flex; flex-direction: column; gap: 0; border: 1px solid var(--rule); }
.energy-step {
  display: grid; grid-template-columns: 110px 1.5fr 60px 1fr;
  gap: 16px; padding: 18px 22px; border-bottom: 1px solid var(--rule);
  align-items: center;
}
.energy-step:last-child { border-bottom: 0; }
.energy-step .era { font-family: var(--font-mono); font-size: 11px; color: var(--copper); letter-spacing: .04em; font-weight: 600; }
.energy-step h5 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 21px; margin: 0; letter-spacing: 0; line-height: 1.2; }
.energy-step .level {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .04em; color: var(--ink-mute);
  text-align: center; padding: 4px 8px; background: var(--bg-elev); border: 1px solid var(--hairline-strong);
}
.energy-step .effect { font-size: 14px; color: var(--ink-soft); line-height: 1.55; }
.energy-step .effect em { color: var(--ink); font-style: italic; }

.energy-step.head { background: var(--ink); color: var(--bg); }
.energy-step.head > div { font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; font-weight: 600; }
.energy-step.head h5 { color: var(--bg); font-family: var(--font-mono); font-style: normal; font-size: 11px; letter-spacing: .12em; text-transform: uppercase; font-weight: 600; }

/* ----- Module 4 — Information Revolution ----- */
.info-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
  border: 1px solid var(--rule);
}
.info-cell {
  background: var(--surface); padding: 28px;
  border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
}
.info-cell:nth-child(3n) { border-right: 0; }
.info-cell:nth-last-child(-n+3) { border-bottom: 0; }
.info-cell .ord {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em;
  color: var(--indigo); text-transform: uppercase; font-weight: 600; margin-bottom: 12px;
}
.info-cell h4 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 24px; margin: 0 0 8px; letter-spacing: 0; line-height: 1.15; }
.info-cell .ratio {
  font-family: var(--font-mono); font-size: 12px; color: var(--aqua); letter-spacing: .04em;
  margin-bottom: 12px; padding: 4px 8px; background: var(--bg-deep); display: inline-block;
}
.info-cell p { color: var(--ink-soft); font-size: 13.5px; margin: 0; line-height: 1.65; }
.info-cell p em { color: var(--ink); font-style: italic; }

/* ----- Module 5 — Coordination ----- */
.coord-shell { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.coord-svg-card { border: 1px solid var(--rule); background: var(--surface); padding: 36px; }
.coord-svg-card h3 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 26px; margin: 0 0 6px; letter-spacing: 0; }
.coord-svg-card .sub { font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute); letter-spacing: .12em; margin-bottom: 22px; text-transform: uppercase; }
.coord-svg { width: 100%; aspect-ratio: 1.05; }

.coord-list { display: flex; flex-direction: column; gap: 14px; }
.coord-item {
  border: 1px solid var(--rule); background: var(--surface); padding: 22px 24px;
  border-left: 3px solid var(--aqua);
}
.coord-item:nth-child(2) { border-left-color: var(--copper); }
.coord-item:nth-child(3) { border-left-color: var(--indigo); }
.coord-item:nth-child(4) { border-left-color: var(--crimson); }
.coord-item:nth-child(5) { border-left-color: var(--aqua-deep); }
.coord-item:nth-child(6) { border-left-color: var(--copper-deep); }
.coord-item .scale {
  font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute);
  letter-spacing: .04em; margin-bottom: 6px;
}
.coord-item h5 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 21px; margin: 0 0 6px; letter-spacing: 0; }
.coord-item p { color: var(--ink-soft); font-size: 14px; margin: 0; line-height: 1.6; }

/* ----- Module 6 — Consciousness ----- */
.consc-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0;
  border: 1px solid var(--rule);
}
.consc-cell {
  background: var(--surface); padding: 32px;
  border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
}
.consc-cell:nth-child(2n) { border-right: 0; }
.consc-cell:nth-last-child(-n+2) { border-bottom: 0; }
.consc-cell .domain {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em;
  color: var(--copper); text-transform: uppercase; font-weight: 600; margin-bottom: 12px;
}
.consc-cell h4 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 24px; margin: 0 0 12px; letter-spacing: 0; line-height: 1.15; }
.consc-cell h4 em { font-style: normal; color: var(--aqua); }
.consc-cell p { color: var(--ink-soft); font-size: 14.5px; margin: 0 0 12px; line-height: 1.7; }
.consc-cell p em { color: var(--ink); font-style: italic; }
.consc-cell .pull {
  margin-top: 14px; padding: 12px 16px;
  background: var(--bg-deep); border-left: 2px solid var(--copper);
  font-family: var(--font-display-i); font-style: italic; font-size: 16px;
  line-height: 1.45; color: var(--ink-soft);
}

/* ----- Module 7 — Waves Timeline ----- */
.waves-card { border: 1px solid var(--rule); background: var(--surface); padding: 36px; }
.waves-card h3 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 28px; margin: 0 0 6px; letter-spacing: 0; }
.waves-card .sub { font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute); letter-spacing: .12em; margin-bottom: 22px; text-transform: uppercase; }
.waves-svg { width: 100%; aspect-ratio: 3.0; max-height: 320px; }

.waves-list { margin-top: 28px; display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1px; background: var(--rule); border: 1px solid var(--rule); }
.wave-card { background: var(--surface); padding: 24px; }
.wave-card .num {
  font-family: var(--font-display-i); font-style: italic; font-size: 28px;
  color: var(--aqua); line-height: 1; margin-bottom: 8px;
}
.wave-card .id {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em;
  color: var(--aqua); text-transform: uppercase; font-weight: 600;
}
.wave-card h5 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 21px; margin: 6px 0 6px; letter-spacing: 0; line-height: 1.2; }
.wave-card .span { font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute); letter-spacing: .04em; margin-bottom: 12px; }
.wave-card p { color: var(--ink-soft); font-size: 13.5px; margin: 0; line-height: 1.6; }

/* ----- Module 8 — Civilization Simulator ----- */
.sim-shell { border: 1px solid var(--rule); background: var(--surface); padding: 40px; }
.sim-prompt {
  font-family: var(--font-display-i); font-style: italic; font-size: 26px;
  margin: 0 0 8px; letter-spacing: 0; line-height: 1.3;
}
.sim-prompt em { font-style: normal; color: var(--aqua); }
.sim-meta { font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute); letter-spacing: .12em; margin-bottom: 28px; text-transform: uppercase; }

.sim-picker {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px;
  margin-bottom: 28px;
}
.sim-btn {
  background: transparent; border: 1px solid var(--hairline-strong);
  padding: 14px 12px; cursor: pointer;
  font: inherit; color: var(--ink-soft); font-family: var(--font-display-i); font-style: italic;
  font-size: 17px; letter-spacing: 0; text-align: center; transition: all .15s; line-height: 1.2;
}
.sim-btn:hover { background: var(--bg-elev); color: var(--ink); border-color: var(--aqua); }
.sim-btn.active { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.sim-btn .label {
  display: block; font-family: var(--font-mono); font-style: normal; font-size: 9.5px;
  color: var(--copper); letter-spacing: .12em; margin-bottom: 6px; text-transform: uppercase;
}
.sim-btn.active .label { color: var(--copper); }

.sim-outcome {
  background: var(--bg-deep); border: 1px dashed var(--hairline-strong); padding: 28px;
}
.sim-outcome .head {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em;
  color: var(--ink-mute); text-transform: uppercase; margin-bottom: 18px;
}
.sim-row {
  display: grid; grid-template-columns: 130px 1fr; gap: 18px;
  padding: 14px 0; border-bottom: 1px dashed var(--hairline-strong);
  font-size: 14.5px; align-items: start; line-height: 1.65;
}
.sim-row:last-child { border-bottom: 0; }
.sim-row .axis {
  font-family: var(--font-mono); font-size: 11px; color: var(--aqua);
  letter-spacing: .04em; padding-top: 3px; font-weight: 600; text-transform: uppercase;
}
.sim-row .text { color: var(--ink-soft); }
.sim-row .text em { color: var(--ink); font-style: italic; }

/* ----- Module 9 — AI & Future ----- */
.future-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0;
  border: 1px solid var(--rule);
}
.future-cell {
  background: var(--surface); padding: 32px;
  border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
}
.future-cell:nth-child(2n) { border-right: 0; }
.future-cell:nth-last-child(-n+2) { border-bottom: 0; }
.future-cell .tag {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em;
  color: var(--indigo); text-transform: uppercase; font-weight: 600; margin-bottom: 12px;
  display: inline-block; padding: 3px 10px; border: 1px solid var(--indigo);
}
.future-cell h4 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 26px; margin: 0 0 10px; letter-spacing: 0; line-height: 1.15; }
.future-cell .stage {
  font-family: var(--font-mono); font-size: 11px; color: var(--ink-mute); letter-spacing: .04em;
  margin-bottom: 14px;
}
.future-cell p { color: var(--ink-soft); font-size: 14.5px; margin: 0 0 12px; line-height: 1.65; }
.future-cell p em { color: var(--ink); font-style: italic; }
.future-cell .question {
  margin-top: 14px; padding: 14px 18px;
  background: var(--bg-deep); border-left: 2px solid var(--indigo);
  font-family: var(--font-display-i); font-style: italic; font-size: 17px;
  line-height: 1.45; color: var(--ink); letter-spacing: 0;
}

/* ----- Module 10 — Risks ----- */
.risks-card {
  border: 1px solid var(--crimson); background: var(--surface);
  padding: 40px;
}
.risks-head {
  display: flex; gap: 16px; align-items: center;
  margin-bottom: 22px; padding-bottom: 18px; border-bottom: 1px solid var(--crimson);
}
.risks-head .glyph {
  display: inline-block; width: 48px; height: 48px;
  background: var(--crimson); color: var(--paper);
  font-family: var(--font-display-i); font-style: italic; font-size: 28px;
  display: grid; place-items: center; line-height: 1;
}
.risks-head h3 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 30px; margin: 0; letter-spacing: 0; }
.risks-head .sub { font-family: var(--font-mono); font-size: 11px; color: var(--crimson); letter-spacing: .12em; text-transform: uppercase; margin-top: 4px; }
.risks-list { list-style: none; padding: 0; margin: 0; counter-reset: rk; }
.risks-list li {
  padding: 18px 0 18px 60px; position: relative;
  border-top: 1px dashed var(--hairline-strong);
  counter-increment: rk;
}
.risks-list li:first-child { border-top: 0; padding-top: 6px; }
.risks-list li::before {
  content: "§ " counter(rk, decimal);
  position: absolute; left: 0; top: 20px;
  font-family: var(--font-mono); font-size: 11px; color: var(--crimson);
  letter-spacing: .04em; font-weight: 600;
}
.risks-list li:first-child::before { top: 8px; }
.risks-list h5 { font-family: var(--font-display-i); font-style: italic; font-weight: 400; font-size: 22px; margin: 0 0 6px; letter-spacing: 0; }
.risks-list p { color: var(--ink-soft); font-size: 15px; margin: 0; line-height: 1.65; }
.risks-list p em { color: var(--ink); font-style: italic; }
.risks-list .tradeoff {
  margin-top: 10px; font-family: var(--font-mono); font-size: 12px; color: var(--copper);
  letter-spacing: .04em; line-height: 1.5;
}

/* ----- Module 11 — Philosopher Q&A ----- */
.philosopher {
  border: 1px solid var(--rule); background: var(--surface);
  display: grid; grid-template-columns: 320px 1fr; min-height: 580px;
  box-shadow: var(--shadow);
}
.phil-side {
  background: var(--bg-elev); border-right: 1px solid var(--rule);
  padding: 28px;
}
.phil-side h4 {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-mute); margin: 0 0 16px; font-weight: 600;
}
.phil-pill {
  background: transparent; border: 1px solid var(--hairline-strong);
  padding: 11px 14px; font: inherit; font-size: 13.5px;
  cursor: pointer; width: 100%; text-align: left; margin-bottom: 8px;
  color: var(--ink-soft); transition: all .15s; line-height: 1.4;
  font-family: var(--font-body);
}
.phil-pill:hover { background: var(--surface); color: var(--ink); border-color: var(--aqua); }
.phil-main { display: flex; flex-direction: column; }
.phil-stream { flex: 1; padding: 32px; overflow-y: auto; max-height: 580px; }
.msg { margin-bottom: 24px; max-width: 90%; }
.msg.user { margin-left: auto; }
.msg .role {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .12em;
  text-transform: uppercase; color: var(--ink-mute); margin-bottom: 6px; font-weight: 600;
}
.msg .bubble {
  background: var(--bg-elev); border: 1px solid var(--hairline-strong);
  padding: 16px 20px; font-size: 15.5px; line-height: 1.65; font-family: var(--font-body);
}
.msg.user .bubble { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.msg .bubble p { margin: 0 0 10px; }
.msg .bubble p:last-child { margin-bottom: 0; }
.msg .bubble strong { color: var(--aqua); font-weight: 600; }
.msg.user .bubble strong { color: var(--copper); }
.msg .bubble .quoted {
  margin: 8px 0 6px; padding: 6px 0 6px 14px;
  border-left: 2px solid var(--aqua);
  font-family: var(--font-display-i); font-style: italic;
  font-size: 17px; line-height: 1.45; color: var(--ink-soft);
}
.phil-input {
  border-top: 1px solid var(--hairline-strong); padding: 18px;
  display: flex; gap: 10px; background: var(--bg-elev);
}
.phil-input input {
  flex: 1; border: 1px solid var(--hairline-strong); background: var(--surface); color: var(--ink);
  padding: 12px 18px; font: inherit; font-size: 15px; font-family: var(--font-body);
}
.phil-input input:focus { outline: 2px solid var(--aqua); outline-offset: -1px; }
.phil-input input::placeholder { color: var(--ink-mute); font-style: italic; }

/* ----- Footer ----- */
.footer {
  background: var(--bg-deep); color: #b6ad97;
  padding: 80px 0 40px;
  border-top: 1px solid var(--hairline-strong);
}
html[data-theme="light"] .footer { background: var(--ink); color: #c5beb1; }
html[data-theme="light"] .footer-brand { color: var(--bg); }
html[data-theme="light"] .footer a { color: #c5beb1; }
html[data-theme="light"] .footer-bottom a { color: #968d80; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 56px; }
.footer h5 {
  font-family: var(--font-mono); font-size: 11px; text-transform: uppercase;
  letter-spacing: .12em; color: var(--aqua); margin: 0 0 18px; font-weight: 600;
}
.footer ul { list-style: none; padding: 0; margin: 0; }
.footer li { margin-bottom: 8px; font-size: 14.5px; }
.footer a { color: #b6ad97; border: 0; }
.footer a:hover { color: var(--aqua); }
.footer-brand {
  font-family: var(--font-display); font-weight: 400; font-size: 38px;
  color: var(--ink); letter-spacing: .04em; margin-bottom: 14px; line-height: 1;
}
.footer-brand .gk { font-family: var(--font-display-i); font-style: italic; color: var(--aqua); letter-spacing: 0; }
.footer-tag { color: #6e7388; font-size: 14.5px; max-width: 380px; line-height: 1.65; font-style: italic; font-family: var(--font-display-i); }
.footer-bottom {
  border-top: 1px solid #ffffff14; padding-top: 24px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: #6e7388; font-family: var(--font-mono);
  letter-spacing: .04em;
}
.footer-bottom a { color: #6e7388; border: 0; }

/* ----- i18n ----- */
html[data-lang="en"] [lang="zh"] { display: none !important; }
html[data-lang="zh"] [lang="en"] { display: none !important; }
html[data-lang="en"][lang="zh"], html[data-lang="zh"][lang="en"] { display: block !important; }

/* ----- Responsive ----- */
@media (max-width: 1000px) {
  .nav { display: none; }
  .hero { padding: 50px 0 50px; }
  .hero-thesis { grid-template-columns: 1fr; gap: 24px; padding: 24px 0; }
  .section { padding: 70px 0; }
  .section-head { grid-template-columns: 1fr; gap: 20px; margin-bottom: 36px; }
  .def-shell { grid-template-columns: 1fr; }
  .def-cell:not(:last-child) { border-right: 0; border-bottom: 1px solid var(--rule); }
  .examples-list { grid-template-columns: 1fr; }
  .cap-shell, .coord-shell { grid-template-columns: 1fr; gap: 24px; }
  .energy-step { grid-template-columns: 90px 1fr; row-gap: 4px; }
  .energy-step > div:nth-child(3), .energy-step > div:nth-child(4) { grid-column: 1 / -1; padding-left: 0; }
  .info-grid { grid-template-columns: 1fr; }
  .info-cell { border-right: 0 !important; border-bottom: 1px solid var(--rule) !important; }
  .info-cell:last-child { border-bottom: 0 !important; }
  .consc-grid, .future-grid { grid-template-columns: 1fr; }
  .consc-cell, .future-cell { border-right: 0 !important; border-bottom: 1px solid var(--rule) !important; }
  .consc-cell:last-child, .future-cell:last-child { border-bottom: 0 !important; }
  .sim-picker { grid-template-columns: 1fr 1fr; }
  .philosopher { grid-template-columns: 1fr; min-height: 0; }
  .phil-side { border-right: 0; border-bottom: 1px solid var(--rule); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .toolbar { gap: 6px; }
  .lang-toggle button, .theme-toggle button { padding: 5px 8px; font-size: 10px; }
}

/* ----- utility ----- */
.fade-in { opacity: 0; transform: translateY(8px); transition: opacity .5s, transform .5s; }
.fade-in.in { opacity: 1; transform: none; }