:root {
  color-scheme: dark;
  --bg: #090c0d;
  --bg-soft: #0e1314;
  --panel: #111718;
  --panel-2: #151c1d;
  --paper: #ece7db;
  --muted: #999d98;
  --dim: #676d6a;
  --line: rgba(236, 231, 219, .13);
  --line-strong: rgba(236, 231, 219, .25);
  --amber: #d79a4f;
  --amber-soft: #f0bd75;
  --blue: #5d91e8;
  --blue-soft: #8eb6f4;
  --red: #d66b58;
  --green: #68a881;
  --max: 1520px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 82% -10%, rgba(93, 145, 232, .08), transparent 30rem),
    var(--bg);
  color: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; }
::selection { background: var(--amber); color: #111; }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  transform: translateY(-150%);
  border-radius: 6px;
  background: var(--paper);
  color: #111;
  font-weight: 800;
}
.skip-link:focus { transform: none; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 11px clamp(16px, 3vw, 48px);
  border-bottom: 1px solid var(--line);
  background: rgba(9, 12, 13, .86);
  backdrop-filter: blur(18px);
}

.wordmark {
  text-decoration: none;
  font-weight: 850;
  font-size: 21px;
  letter-spacing: -.045em;
}
.wordmark span { color: var(--amber); }
.header-tools { display: flex; align-items: center; gap: 14px; }
.header-link {
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  font-size: 12px;
  font-weight: 750;
}
.header-link:hover { border-color: var(--line-strong); color: var(--paper); }

.mode-switch {
  display: flex;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: rgba(255,255,255,.025);
}
.mode-switch button {
  min-height: 32px;
  padding: 6px 10px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 11px;
  font-weight: 800;
}
.mode-switch button.active {
  background: var(--paper);
  color: #141718;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(420px, 1.08fr);
  min-height: calc(100svh - 68px);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero::before {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(236,231,219,.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(236,231,219,.028) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black, transparent 84%);
  content: "";
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 2;
  align-self: center;
  padding: clamp(58px, 9vw, 140px) clamp(24px, 6vw, 96px);
}
.kicker {
  margin: 0 0 18px;
  color: var(--amber);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.hero h1 {
  max-width: 820px;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(62px, 8.4vw, 142px);
  font-weight: 400;
  line-height: .82;
  letter-spacing: -.075em;
}
.hero .subtitle {
  max-width: 660px;
  margin: 30px 0 0;
  color: #c5c3bb;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(20px, 2.2vw, 31px);
  line-height: 1.28;
}
.hero .caution {
  max-width: 580px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}
.start-button {
  display: inline-flex;
  align-items: center;
  gap: 22px;
  margin-top: 36px;
  padding: 12px 0;
  border-bottom: 1px solid var(--amber);
  color: var(--paper);
  text-decoration: none;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: .05em;
  text-transform: uppercase;
}
.start-button span { color: var(--amber); font-size: 17px; }

.hero-landscape {
  position: relative;
  z-index: 1;
  min-height: 600px;
  overflow: hidden;
  border-left: 1px solid var(--line);
}
.hero-landscape svg { display: block; width: 100%; height: 100%; object-fit: cover; }
.hero-people { filter: drop-shadow(0 12px 14px rgba(0,0,0,.5)); }
.knowledge-embers { fill: var(--amber-soft); animation: ember 3s ease-in-out infinite alternate; }
.wind-line {
  fill: none;
  stroke: rgba(236,231,219,.13);
  stroke-width: 1;
  stroke-dasharray: 5 10;
  animation: drift 12s linear infinite;
}
.wind-line.delay { animation-delay: -5s; }
.hero-index {
  position: absolute;
  right: 28px;
  bottom: 28px;
  left: 28px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  background: rgba(9,12,13,.75);
  backdrop-filter: blur(12px);
}
.hero-index span {
  display: grid;
  gap: 6px;
  padding: 14px;
  color: var(--dim);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
}
.hero-index span + span { border-left: 1px solid var(--line); }
.hero-index strong { color: var(--paper); font-size: 13px; letter-spacing: 0; text-transform: none; }

.hero > blockquote {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 3;
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 0;
  padding: 16px 24px;
  border-top: 1px solid var(--line);
  background: rgba(7,9,10,.78);
  color: var(--muted);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(14px, 1.4vw, 19px);
  backdrop-filter: blur(12px);
}
.hero > blockquote strong { color: var(--paper); font-weight: 400; }

.simulation-section,
.runaway-section,
.species-lab,
.evidence-section,
.branching-section {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(76px, 10vw, 150px) 0;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, .7fr);
  gap: clamp(30px, 8vw, 130px);
  align-items: end;
  margin-bottom: 44px;
}
.section-heading h2,
.dependency-section h2,
.branching-section h2 {
  max-width: 1020px;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(39px, 5.2vw, 82px);
  font-weight: 400;
  line-height: .98;
  letter-spacing: -.055em;
}
.section-heading > p,
.dependency-section > div > p:last-child,
.branching-section > div > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.simulator {
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  background: #0d1213;
  box-shadow: 0 45px 120px rgba(0,0,0,.32);
}
.sim-topline {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) auto;
  align-items: stretch;
  border-bottom: 1px solid var(--line);
}
.generation-readout {
  display: grid;
  place-items: center;
  padding: 13px;
  border-right: 1px solid var(--line);
}
.generation-readout span {
  color: var(--dim);
  font-size: 8px;
  font-weight: 850;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.generation-readout strong { font: 400 29px/1 Georgia, serif; }
.timeline {
  display: flex;
  align-items: center;
  gap: 0;
  min-width: 0;
  overflow: hidden;
}
.timeline span {
  position: relative;
  flex: 1;
  min-width: 110px;
  padding: 20px 12px;
  color: #535957;
  font-size: 9px;
  line-height: 1.25;
  text-align: center;
}
.timeline span::before {
  position: absolute;
  top: 11px;
  left: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: #3a4140;
  content: "";
}
.timeline span.active { color: var(--paper); }
.timeline span.active::before { background: var(--amber); box-shadow: 0 0 0 4px rgba(215,154,79,.12); }
.time-controls {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 8px;
  border-left: 1px solid var(--line);
}
.time-controls button {
  padding: 7px 8px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--dim);
  cursor: pointer;
  font-size: 9px;
  font-weight: 800;
  text-transform: uppercase;
}
.time-controls button.active { border-color: var(--line); color: var(--paper); background: rgba(255,255,255,.04); }

.sim-layout { display: grid; grid-template-columns: 330px minmax(0, 1fr); }
.control-panel {
  padding: 18px;
  border-right: 1px solid var(--line);
  background: #111617;
}
.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.panel-heading > div { display: grid; gap: 3px; }
.panel-heading span,
.action-picker legend {
  color: var(--dim);
  font-size: 8px;
  font-weight: 850;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.panel-heading strong { font-size: 11px; }
.panel-heading button,
.text-button {
  padding: 4px;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 10px;
}
.trait-controls { display: grid; gap: 6px; }
.trait-controls > button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  min-height: 56px;
  padding: 9px 9px 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,.018);
  cursor: pointer;
  text-align: left;
  transition: border-color .16s ease, background .16s ease, transform .16s ease;
}
.trait-controls > button:hover:not(:disabled) { border-color: rgba(215,154,79,.48); background: rgba(215,154,79,.035); transform: translateX(2px); }
.trait-controls > button:disabled { cursor: not-allowed; opacity: .56; }
.trait-controls span { display: grid; min-width: 0; gap: 3px; }
.trait-controls strong { font-size: 11px; }
.trait-controls small { overflow: hidden; color: var(--dim); font-size: 8px; line-height: 1.3; text-overflow: ellipsis; white-space: nowrap; }
.trait-controls em {
  display: flex;
  align-items: center;
  gap: 7px;
  flex: 0 0 auto;
  font-style: normal;
}
.trait-controls b { color: var(--amber-soft); font: 400 17px/1 Georgia, serif; }
.trait-controls i {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--paper);
  font-style: normal;
}
.trait-controls button[data-count]::after {
  position: absolute;
  top: 4px;
  right: 38px;
  color: var(--amber);
  content: "+" attr(data-count);
  font-size: 8px;
  font-weight: 900;
}

.action-picker {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
  margin: 17px 0 0;
  padding: 12px 0 0;
  border: 0;
  border-top: 1px solid var(--line);
}
.action-picker legend { padding: 0 0 9px; }
.action-picker label { position: relative; }
.action-picker input { position: absolute; opacity: 0; }
.action-picker span {
  display: grid;
  min-height: 42px;
  place-items: center;
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--muted);
  cursor: pointer;
  font-size: 8px;
  line-height: 1.25;
  text-align: center;
}
.action-picker input:checked + span {
  border-color: rgba(93,145,232,.62);
  background: rgba(93,145,232,.09);
  color: var(--paper);
}
.advance-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-top: 14px;
  padding: 13px 14px;
  border: 1px solid var(--amber);
  border-radius: 8px;
  background: var(--amber);
  color: #15130f;
  cursor: pointer;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.advance-button:hover { background: var(--amber-soft); }
.text-button { display: block; margin: 12px auto 0; }

.world-panel { min-width: 0; }
.world-scene {
  position: relative;
  overflow: hidden;
  min-height: 390px;
  border-bottom: 1px solid var(--line);
  background: #0b0f10;
}
.world-scene svg { display: block; width: 100%; height: 390px; }
.world-scene::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 55%, rgba(9,12,13,.7));
  content: "";
  pointer-events: none;
}
.population-figures circle { fill: #121717; stroke: rgba(236,231,219,.4); stroke-width: 1; }
.population-figures path { fill: #080b0b; stroke: rgba(236,231,219,.28); stroke-width: 1; }
.knowledge-lines line { stroke: var(--blue); stroke-width: 1; opacity: .16; }
.knowledge-nodes circle { fill: var(--blue-soft); opacity: .45; }
.phase-threshold .knowledge-lines line { opacity: .42; }
.phase-runaway .knowledge-lines line { opacity: .67; }
.phase-runaway .knowledge-nodes circle { opacity: .8; }
.fire { fill: var(--amber); }
.fire-halo { opacity: .56; }
.scene-status {
  position: absolute;
  right: 20px;
  bottom: 18px;
  left: 20px;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: rgba(9,12,13,.78);
  backdrop-filter: blur(12px);
}
.scene-status span {
  color: var(--amber);
  font-size: 8px;
  font-weight: 850;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.scene-status strong { max-width: 580px; font-size: 10px; font-weight: 650; text-align: right; }

.metric-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border-bottom: 1px solid var(--line);
}
.metric-grid article {
  display: grid;
  gap: 7px;
  min-width: 0;
  padding: 15px 12px;
}
.metric-grid article + article { border-left: 1px solid var(--line); }
.metric-grid span { color: var(--dim); font-size: 8px; font-weight: 750; text-transform: uppercase; }
.metric-grid strong { font: 400 20px/1 Georgia, serif; }
.metric-grid small {
  overflow: hidden;
  color: var(--dim);
  font-size: 7px;
  line-height: 1.3;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.meter { height: 2px; overflow: hidden; background: rgba(255,255,255,.08); }
.meter i { display: block; height: 100%; background: var(--blue); transition: width .5s ease; }
.meter.energy i { background: var(--amber); }
.meter.knowledge i { background: var(--blue-soft); }
.meter.dependency i { background: var(--green); }
.knowledge-metric { background: rgba(93,145,232,.035); }

.causal-explanation { display: grid; grid-template-columns: repeat(3, 1fr); }
.causal-explanation article { min-height: 106px; padding: 16px; }
.causal-explanation article + article { border-left: 1px solid var(--line); }
.causal-explanation span { color: var(--amber); font-size: 8px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.causal-explanation p { margin: 8px 0 0; color: var(--muted); font-size: 10px; line-height: 1.55; }

.threshold-panel {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(420px, 1.2fr);
  gap: 70px;
  padding: 30px;
  border-top: 1px solid var(--line);
  background: #0a0e0f;
}
.threshold-panel h3 {
  max-width: 600px;
  margin: 0;
  font: 400 clamp(26px, 3vw, 44px)/1.08 Georgia, serif;
  letter-spacing: -.035em;
}
.threshold-progress { align-self: center; }
.threshold-progress > div:first-child { display: flex; justify-content: space-between; font-size: 10px; }
.threshold-progress > div:first-child span { color: var(--muted); }
.threshold-track { height: 5px; margin: 10px 0 13px; overflow: hidden; background: rgba(255,255,255,.07); }
.threshold-track i { display: block; height: 100%; background: linear-gradient(90deg, var(--amber), var(--blue)); transition: width .5s ease; }
.threshold-progress ul { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; margin: 0; padding: 0; list-style: none; }
.threshold-progress li {
  display: flex;
  justify-content: space-between;
  gap: 7px;
  padding-top: 7px;
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 8px;
}
.threshold-progress li.met { color: var(--paper); }
.threshold-progress li.met strong { color: var(--green); }

.failure-panel,
.threshold-event {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 30px;
  align-items: center;
  padding: 30px;
  border-top: 1px solid rgba(214,107,88,.5);
  background: rgba(100,38,30,.17);
}
.failure-panel[hidden],
.threshold-event[hidden] { display: none; }
.failure-panel h3,
.threshold-event h3 { margin: 0; font: 400 clamp(30px, 4vw, 58px)/1 Georgia, serif; letter-spacing: -.045em; }
.failure-panel blockquote { margin: 15px 0 7px; color: var(--red); font: 400 20px/1.35 Georgia, serif; }
.failure-panel p:last-child,
.threshold-event p:last-child { max-width: 770px; margin: 0; color: var(--muted); font-size: 11px; line-height: 1.6; }
.failure-panel button,
.threshold-event button {
  padding: 11px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: transparent;
  cursor: pointer;
  font-size: 10px;
  font-weight: 800;
}
.threshold-event {
  grid-template-columns: minmax(0, 1fr) minmax(360px, .9fr);
  overflow: hidden;
  border-color: rgba(93,145,232,.48);
  background: linear-gradient(120deg, rgba(93,145,232,.14), rgba(215,154,79,.07));
}
.threshold-flare {
  position: absolute;
  top: -180px;
  right: 20%;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(93,145,232,.21), transparent 65%);
  pointer-events: none;
}
.cultural-archive { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: 7px; }
.cultural-archive span {
  padding: 7px 9px;
  border: 1px solid rgba(93,145,232,.32);
  border-radius: 99px;
  background: rgba(93,145,232,.07);
  color: var(--blue-soft);
  font-size: 9px;
}

.runaway-section { border-top: 1px solid var(--line); }
.feedback-layout { display: grid; grid-template-columns: minmax(420px, .9fr) minmax(0, 1.1fr); gap: clamp(50px, 9vw, 150px); align-items: center; }
.feedback-loop { position: relative; width: min(100%, 650px); margin: 0 auto; }
.feedback-loop svg { display: block; width: 100%; }
.loop-orbit { fill: none; stroke: var(--line); stroke-width: 1; stroke-dasharray: 3 8; }
.loop-arrows path { fill: none; stroke: var(--blue); stroke-width: 2; opacity: .5; marker-end: none; }
.loop-nodes circle { fill: #111718; stroke: var(--line-strong); }
.loop-nodes text { fill: var(--paper); font: 11px Inter, sans-serif; }
.loop-centre circle { fill: rgba(215,154,79,.07); stroke: rgba(215,154,79,.35); }
.loop-centre text { fill: var(--amber-soft); font: 800 12px Inter, sans-serif; letter-spacing: .12em; }
.loop-speed {
  position: absolute;
  right: 50%;
  bottom: 34px;
  translate: 50% 0;
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 99px;
  background: var(--bg);
  color: var(--dim);
  font-size: 9px;
  white-space: nowrap;
}
.loop-speed strong { color: var(--paper); }
.feedback-loop.active .loop-arrows { animation: loop-pulse 2.8s ease-in-out infinite alternate; transform-origin: center; }
.feedback-loop.runaway .loop-arrows { animation-duration: 1.2s; }
.human-environment > p { max-width: 620px; color: var(--muted); font: 400 clamp(20px,2vw,29px)/1.4 Georgia, serif; }
.human-environment ul { margin: 28px 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.human-environment li {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  color: #c7c6c0;
  font-size: 12px;
}
.human-environment li span { color: var(--blue); font-size: 9px; }
.human-environment blockquote {
  margin: 34px 0 0;
  padding-left: 20px;
  border-left: 1px solid var(--amber);
  color: var(--paper);
  font: 400 clamp(24px,3vw,43px)/1.18 Georgia, serif;
}

.dependency-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(370px, .75fr);
  gap: clamp(50px, 10vw, 160px);
  align-items: end;
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(75px,10vw,150px) 0;
  border-top: 1px solid var(--line);
}
.dependency-section > div > p:last-child { max-width: 720px; margin-top: 24px; }
.dependency-display { padding: 28px 0; border-block: 1px solid var(--line); }
.dependency-display output { display: block; color: var(--blue-soft); font: 400 clamp(76px, 10vw, 150px)/.8 Georgia, serif; letter-spacing: -.07em; }
.dependency-display > span { display: block; margin-top: 20px; color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .1em; }
.dependency-scale { height: 6px; margin: 24px 0; background: rgba(255,255,255,.07); }
.dependency-scale i { display: block; height: 100%; background: linear-gradient(90deg,var(--blue),var(--amber)); transition: width .6s ease; }
.dependency-display strong { font: 400 21px/1.3 Georgia, serif; }

.species-lab { border-top: 1px solid var(--line); }
.lab-layout { display: grid; grid-template-columns: 250px minmax(0,1fr); border: 1px solid var(--line-strong); border-radius: 14px; overflow: hidden; }
.species-tabs { display: grid; align-content: start; background: #0d1213; }
.species-tabs button {
  padding: 20px 18px;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 11px;
  text-align: left;
}
.species-tabs button[aria-selected="true"] { background: rgba(93,145,232,.08); color: var(--paper); box-shadow: inset 2px 0 var(--blue); }
.lab-result {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 35px;
  align-items: center;
  min-height: 390px;
  padding: clamp(28px,5vw,72px);
  background:
    radial-gradient(circle at 0 50%, rgba(93,145,232,.11), transparent 24rem),
    #111718;
}
.species-glyph {
  display: grid;
  width: 170px;
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid rgba(93,145,232,.3);
  border-radius: 50%;
  background: rgba(93,145,232,.045);
  color: var(--blue-soft);
  font: 400 52px/1 Georgia, serif;
}
.lab-result h3 { max-width: 780px; margin: 0; font: 400 clamp(30px,4vw,58px)/1.05 Georgia, serif; letter-spacing: -.045em; }
.lab-metrics { display: grid; grid-template-columns: repeat(4,1fr); margin-top: 35px; border-block: 1px solid var(--line); }
.lab-metrics span { display: grid; gap: 8px; padding: 15px 12px; color: var(--dim); font-size: 8px; text-transform: uppercase; }
.lab-metrics span + span { border-left: 1px solid var(--line); }
.lab-metrics strong { color: var(--paper); font: 400 23px/1 Georgia, serif; }
.profile-notes { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin: 18px 0 0; }
.profile-notes div { display: grid; gap: 5px; }
.profile-notes dt { color: var(--amber); font-size: 8px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; }
.profile-notes dd { margin: 0; color: var(--muted); font-size: 9px; line-height: 1.45; }
.lab-caution { margin: 18px 0 0; color: var(--dim); font-size: 9px; }

.evidence-section { border-top: 1px solid var(--line); }
.evidence-grid { display: grid; grid-template-columns: repeat(3,1fr); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
.evidence-grid article { min-height: 260px; padding: 27px; background: #0d1213; }
.evidence-grid article:nth-child(n+4) { border-top: 1px solid var(--line); }
.evidence-grid article:not(:nth-child(3n+1)) { border-left: 1px solid var(--line); }
.evidence-grid span { color: var(--blue-soft); font-size: 8px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.evidence-grid [data-evidence="strong"] span { color: var(--green); }
.evidence-grid [data-evidence="disputed"] span,
.evidence-grid [data-evidence="uncertain"] span { color: var(--amber); }
.evidence-grid [data-evidence="assumption"] span { color: var(--red); }
.evidence-grid h3 { margin: 26px 0 12px; font: 400 24px/1.15 Georgia, serif; }
.evidence-grid p { margin: 0; color: var(--muted); font-size: 11px; line-height: 1.6; }
.source-panel { margin-top: 14px; border: 1px solid var(--line); border-radius: 9px; background: #0d1213; }
.source-panel summary { padding: 16px 18px; cursor: pointer; color: var(--paper); font-size: 11px; font-weight: 800; }
.source-panel > div { padding: 0 18px 20px; color: var(--muted); font-size: 11px; line-height: 1.6; }
.source-panel li + li { margin-top: 4px; }
.source-status { color: var(--amber); }

.body-evidence-tag,
body:not(.evidence-on) .epistemic-tag { display: none; }
body.evidence-on .epistemic-tag {
  display: inline-block;
  margin-top: 4px;
  padding: 3px 5px;
  border: 1px solid rgba(93,145,232,.34);
  border-radius: 99px;
  color: var(--blue-soft);
  font-size: 6px;
  font-weight: 850;
  letter-spacing: .06em;
  text-transform: uppercase;
}
body.evidence-on .simulator { box-shadow: 0 0 0 1px rgba(93,145,232,.28), 0 45px 120px rgba(0,0,0,.32); }

.branching-section {
  display: grid;
  grid-template-columns: minmax(350px, .75fr) minmax(0, 1.25fr);
  gap: clamp(50px,8vw,120px);
  align-items: center;
  border-top: 1px solid var(--line);
}
.branching-section > div > p:last-child { margin-top: 24px; }
.branching-tree { display: block; width: 100%; }
.tree-lines path { fill: none; stroke: rgba(93,145,232,.4); stroke-width: 1.5; }
.tree-nodes circle { fill: var(--amber); }
.tree-nodes text { fill: var(--muted); font: 10px Inter, sans-serif; text-anchor: middle; }

.ending {
  position: relative;
  display: grid;
  min-height: 100svh;
  place-items: center;
  overflow: hidden;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at center, rgba(93,145,232,.08), transparent 32rem),
    #07090a;
}
.modern-network { position: absolute; inset: 0; opacity: .24; }
.modern-network span {
  position: absolute;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: 99px;
  color: var(--muted);
  font-size: 8px;
  text-transform: uppercase;
}
.modern-network span:nth-child(1){top:14%;left:12%}.modern-network span:nth-child(2){top:25%;left:73%}.modern-network span:nth-child(3){top:51%;left:8%}.modern-network span:nth-child(4){top:69%;left:81%}.modern-network span:nth-child(5){top:79%;left:22%}.modern-network span:nth-child(6){top:12%;left:45%}.modern-network span:nth-child(7){top:43%;left:84%}.modern-network span:nth-child(8){top:84%;left:59%}.modern-network span:nth-child(9){top:36%;left:20%}
.newborn {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 120px;
  height: 120px;
  translate: -50% -50%;
  place-items: center;
  border: 1px solid rgba(236,231,219,.17);
  border-radius: 50%;
  background: rgba(236,231,219,.025);
}
.newborn span { width: 23px; height: 23px; border-radius: 50%; background: var(--paper); box-shadow: 0 28px 0 9px var(--paper); }
.inheritance-lines {
  position: absolute;
  inset: -20%;
  background: repeating-conic-gradient(from 0deg at 50% 50%, transparent 0deg 2.7deg, rgba(93,145,232,.09) 2.9deg 3deg);
  mask-image: radial-gradient(circle at center, transparent 0 80px, black 82px 48%, transparent 72%);
  opacity: .7;
}
.ending .modern-network,
.ending .inheritance-lines,
.ending .ending-copy {
  transition: opacity 1.4s ease, transform 1.4s ease;
}
.ending:not(.revealed) .modern-network { opacity: .5; }
.ending.revealed .modern-network { opacity: .08; transform: scale(1.04); }
.ending:not(.revealed) .inheritance-lines,
.ending:not(.revealed) .ending-copy { opacity: 0; }
.ending.revealed .inheritance-lines,
.ending.revealed .ending-copy { opacity: 1; }
.ending-copy { position: relative; z-index: 3; max-width: 1100px; padding: 30px; text-align: center; }
.ending-copy > p { margin: 0 0 210px; color: var(--muted); font: 400 18px Georgia, serif; }
.ending h2 { margin: 0; font: 400 clamp(55px,9vw,138px)/.86 Georgia, serif; letter-spacing: -.075em; }
.ending blockquote { margin: 34px 0; color: var(--muted); font: 400 clamp(17px,2vw,27px)/1.5 Georgia, serif; }
.ending-copy > div { display: flex; justify-content: center; gap: 10px; }
.ending button {
  padding: 11px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  background: rgba(9,12,13,.7);
  cursor: pointer;
  font-size: 10px;
  font-weight: 800;
}
.ending button:first-child { border-color: var(--amber); color: var(--amber-soft); }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 20px clamp(20px,4vw,60px);
  border-top: 1px solid var(--line);
  color: var(--dim);
  font-size: 10px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid rgba(93,145,232,.72);
  outline-offset: 3px;
}

@keyframes drift { to { stroke-dashoffset: -120; } }
@keyframes ember { to { opacity: .35; transform: translateY(-8px); } }
@keyframes loop-pulse { to { opacity: .95; transform: rotate(2deg); } }

@media (max-width: 1180px) {
  .hero { grid-template-columns: 1fr 1fr; }
  .sim-layout { grid-template-columns: 300px minmax(0,1fr); }
  .metric-grid { grid-template-columns: repeat(3,1fr); }
  .metric-grid article:nth-child(4) { border-left: 0; border-top: 1px solid var(--line); }
  .metric-grid article:nth-child(5),
  .metric-grid article:nth-child(6) { border-top: 1px solid var(--line); }
  .threshold-panel { gap: 35px; }
  .feedback-layout { gap: 50px; }
  .evidence-grid { grid-template-columns: repeat(2,1fr); }
  .evidence-grid article:nth-child(n) { border-top: 0; border-left: 0; }
  .evidence-grid article:nth-child(even) { border-left: 1px solid var(--line); }
  .evidence-grid article:nth-child(n+3) { border-top: 1px solid var(--line); }
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-copy { padding-bottom: 64px; }
  .hero-landscape { min-height: 520px; border-top: 1px solid var(--line); border-left: 0; }
  .hero > blockquote { position: relative; flex-wrap: wrap; text-align: center; }
  .section-heading,
  .dependency-section,
  .branching-section,
  .feedback-layout { grid-template-columns: 1fr; }
  .sim-layout { grid-template-columns: 1fr; }
  .control-panel { border-right: 0; border-bottom: 1px solid var(--line); }
  .trait-controls { grid-template-columns: 1fr 1fr; }
  .sim-topline { grid-template-columns: 90px minmax(0,1fr); }
  .timeline { overflow-x: auto; }
  .time-controls { grid-column: 1 / -1; justify-content: center; border-top: 1px solid var(--line); border-left: 0; }
  .threshold-panel { grid-template-columns: 1fr; }
  .feedback-loop { max-width: 600px; }
  .dependency-section { align-items: start; }
  .lab-layout { grid-template-columns: 180px minmax(0,1fr); }
  .lab-result { grid-template-columns: 1fr; }
  .species-glyph { width: 110px; }
  .lab-metrics { grid-template-columns: 1fr 1fr; }
  .lab-metrics span:nth-child(3) { border-left: 0; border-top: 1px solid var(--line); }
  .lab-metrics span:nth-child(4) { border-top: 1px solid var(--line); }
  .ending-copy > p { margin-bottom: 190px; }
}

@media (max-width: 620px) {
  .site-header { align-items: flex-start; }
  .header-tools { gap: 7px; }
  .header-link { display: none; }
  .hero-copy { padding: 70px 20px 48px; }
  .hero h1 { font-size: clamp(56px,19vw,88px); }
  .hero-landscape { min-height: 410px; }
  .hero-index { right: 12px; bottom: 12px; left: 12px; }
  .hero-index span { padding: 10px 8px; }
  .simulation-section,
  .runaway-section,
  .species-lab,
  .evidence-section,
  .branching-section,
  .dependency-section { width: min(100% - 20px, var(--max)); padding: 74px 0; }
  .section-heading { margin-bottom: 28px; }
  .simulator { border-radius: 10px; }
  .timeline span { min-width: 105px; }
  .trait-controls { grid-template-columns: 1fr; }
  .action-picker { grid-template-columns: 1fr 1fr; }
  .world-scene,
  .world-scene svg { min-height: 320px; height: 320px; }
  .scene-status { align-items: flex-start; flex-direction: column; gap: 6px; }
  .scene-status strong { text-align: left; }
  .metric-grid { grid-template-columns: 1fr 1fr; }
  .metric-grid article:nth-child(n) { border-top: 0; border-left: 0; }
  .metric-grid article:nth-child(even) { border-left: 1px solid var(--line); }
  .metric-grid article:nth-child(n+3) { border-top: 1px solid var(--line); }
  .causal-explanation { grid-template-columns: 1fr; }
  .causal-explanation article + article { border-top: 1px solid var(--line); border-left: 0; }
  .threshold-panel,
  .failure-panel,
  .threshold-event { grid-template-columns: 1fr; padding: 22px 18px; }
  .threshold-progress ul { grid-template-columns: 1fr 1fr; }
  .feedback-loop { width: 115%; margin-left: -7.5%; }
  .lab-layout { grid-template-columns: 1fr; }
  .species-tabs { grid-template-columns: 1fr 1fr; }
  .species-tabs button { padding: 14px 12px; }
  .lab-result { min-height: auto; padding: 30px 20px; }
  .profile-notes { grid-template-columns: 1fr; }
  .evidence-grid { grid-template-columns: 1fr; }
  .evidence-grid article:nth-child(n) { border-top: 1px solid var(--line); border-left: 0; }
  .evidence-grid article:first-child { border-top: 0; }
  .evidence-grid article { min-height: 0; }
  .branching-tree { width: 140%; margin-left: -20%; }
  .ending-copy > p { margin-bottom: 180px; }
  .ending-copy > div { align-items: stretch; flex-direction: column; }
  .site-footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
}