:root {
  --bg: #080a0d;
  --panel: #101318;
  --panel-raised: #151920;
  --panel-soft: #0d1014;
  --text: #f4f5ef;
  --muted: #929aa4;
  --line: rgba(244, 245, 239, 0.11);
  --line-strong: rgba(244, 245, 239, 0.2);
  --acid: #dfff58;
  --discovery: #64dcff;
  --counter: #ff9b66;
  --representation: #c39aff;
  --transfer: #72efa6;
  --danger: #ff7279;
  --mono: "SFMono-Regular", "Cascadia Code", "Liberation Mono", Menlo, monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow: 0 30px 90px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--bg);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 80% 0%, rgba(100, 220, 255, 0.09), transparent 32rem),
    radial-gradient(circle at 8% 33%, rgba(195, 154, 255, 0.07), transparent 30rem),
    var(--bg);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--acid);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 50;
  padding: 10px 14px;
  border-radius: 8px;
  color: #111;
  background: var(--acid);
  font-weight: 750;
  transform: translateY(-150%);
  transition: transform 0.18s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.lab-header {
  position: relative;
  z-index: 10;
  width: min(1480px, calc(100% - 48px));
  height: 84px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.lab-brand {
  display: flex;
  align-items: center;
  gap: 13px;
  color: inherit;
  text-decoration: none;
}

.brand-code {
  min-width: 51px;
  height: 37px;
  display: grid;
  place-items: center;
  border-radius: 4px;
  color: #0e1207;
  background: var(--acid);
  font: 800 12px var(--mono);
  letter-spacing: -0.03em;
  transform: skewX(-5deg);
}

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

.brand-copy strong {
  font: 700 11px var(--mono);
  letter-spacing: 0.12em;
}

.brand-copy small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 10px;
}

.header-status {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
}

.header-status strong {
  color: var(--text);
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--transfer);
  box-shadow: 0 0 0 5px rgba(114, 239, 166, 0.09), 0 0 15px rgba(114, 239, 166, 0.8);
}

main {
  width: min(1480px, calc(100% - 48px));
  margin: 0 auto;
}

.hero {
  min-height: 640px;
  padding: clamp(70px, 9vw, 132px) 0 clamp(70px, 9vw, 118px);
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(520px, 0.98fr);
  gap: clamp(52px, 7vw, 110px);
  align-items: center;
}

.kicker {
  margin: 0 0 18px;
  color: var(--acid);
  font: 700 10px var(--mono);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(46px, 5.7vw, 82px);
  line-height: 1.01;
  letter-spacing: -0.055em;
  font-weight: 790;
}

.hero h1 em {
  color: var(--acid);
  font-style: normal;
}

.hero-intro {
  max-width: 675px;
  margin: 30px 0 0;
  color: #abb2bb;
  font-size: 15px;
  line-height: 1.85;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
}

.start-button {
  min-height: 48px;
  padding: 0 19px;
  display: inline-flex;
  align-items: center;
  gap: 22px;
  border-radius: 7px;
  color: #0b0d08;
  background: var(--acid);
  text-decoration: none;
  font-size: 12px;
  font-weight: 780;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.start-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(223, 255, 88, 0.14);
}

.start-button span {
  font-size: 16px;
}

.demo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font: 10px var(--mono);
  letter-spacing: 0.06em;
}

.demo-badge i,
.live-indicator i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 10px currentColor;
}

.api-connection-badge { color: var(--muted); }
.api-connection-badge[data-state="ready"] { color: var(--transfer); }
.api-connection-badge[data-state="offline"] { color: var(--danger); }

.hero-system {
  position: relative;
  overflow: hidden;
  min-height: 390px;
  padding: 22px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    rgba(16, 19, 24, 0.82);
  background-size: 30px 30px;
  box-shadow: var(--shadow);
}

.hero-system::before {
  content: "";
  position: absolute;
  width: 200px;
  height: 200px;
  right: -80px;
  top: -90px;
  border-radius: 50%;
  background: rgba(100, 220, 255, 0.08);
  filter: blur(10px);
}

.system-topline {
  display: flex;
  justify-content: space-between;
  color: rgba(244, 245, 239, 0.48);
  font: 9px var(--mono);
  letter-spacing: 0.13em;
}

.system-flow {
  min-height: 230px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.system-node {
  position: relative;
  width: 94px;
  height: 126px;
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line-strong);
  border-radius: 13px;
  background: rgba(8, 10, 13, 0.88);
}

.system-node::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  border-radius: 0 0 13px 13px;
  background: currentColor;
  opacity: 0.9;
}

.system-node span {
  font: 10px var(--mono);
  opacity: 0.7;
}

.system-node strong {
  font-size: 15px;
}

.system-node small {
  color: var(--muted);
  font: 9px var(--mono);
}

.node-observe { color: var(--discovery); transform: translateY(-20px); }
.node-intervene { color: var(--counter); transform: translateY(18px); }
.node-counter { color: var(--representation); transform: translateY(-20px); }
.node-transfer { color: var(--transfer); transform: translateY(18px); }

.system-arrow {
  color: rgba(244, 245, 239, 0.32);
  font: 18px var(--mono);
}

.system-readout {
  padding-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}

.system-readout div {
  min-width: 0;
  padding: 0 15px;
  border-right: 1px solid var(--line);
}

.system-readout div:first-child { padding-left: 0; }
.system-readout div:last-child { padding-right: 0; border-right: 0; }
.system-readout span,
.system-readout strong { display: block; }
.system-readout span { color: var(--muted); font: 9px var(--mono); }
.system-readout strong { margin-top: 7px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; }

.case-section {
  scroll-margin-top: 20px;
  padding: 84px 0 110px;
  border-top: 1px solid var(--line);
}

.section-intro,
.map-heading {
  margin-bottom: 34px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.42fr);
  gap: 50px;
  align-items: end;
}

.section-intro h2,
.map-heading h2 {
  margin: 0;
  font-size: clamp(30px, 3.6vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.045em;
}

.section-intro > p,
.map-heading > p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
}

.case-tabs {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-bottom: 0;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  overflow: hidden;
  background: var(--panel-soft);
}

.case-tab {
  position: relative;
  min-height: 105px;
  padding: 20px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: start;
  border: 0;
  border-right: 1px solid var(--line);
  color: #8f96a0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: color 0.18s ease, background 0.18s ease;
}

.case-tab:last-child { border-right: 0; }

.case-tab::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: var(--tab-color, var(--acid));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}

.case-tab:nth-child(1) { --tab-color: var(--discovery); }
.case-tab:nth-child(2) { --tab-color: var(--counter); }
.case-tab:nth-child(3) { --tab-color: var(--representation); }
.case-tab:nth-child(4) { --tab-color: var(--transfer); }

.case-tab:hover,
.case-tab.is-active {
  color: var(--text);
  background: rgba(255, 255, 255, 0.025);
}

.case-tab.is-active::after { transform: scaleX(1); }

.tab-index {
  color: var(--tab-color);
  font: 10px var(--mono);
}

.case-tab strong,
.case-tab small {
  display: block;
}

.case-tab strong {
  margin-bottom: 8px;
  font-size: 13px;
}

.case-tab small {
  color: var(--muted);
  font-size: 10px;
}

.case-tab > i {
  color: var(--tab-color);
  font-style: normal;
  opacity: 0;
  transform: translate(-4px, 4px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.case-tab.is-active > i {
  opacity: 1;
  transform: translate(0, 0);
}

.case-stage {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  background: rgba(13, 16, 20, 0.8);
  box-shadow: var(--shadow);
}

.case-panel {
  padding: clamp(24px, 3.4vw, 48px);
}

#case-discovery { --case-accent: var(--discovery); }
#case-counterfactual { --case-accent: var(--counter); }
#case-representation { --case-accent: var(--representation); }
#case-transfer { --case-accent: var(--transfer); }

.case-panel[hidden] { display: none; }

.case-panel.is-entering {
  animation: panel-in 0.32s ease both;
}

@keyframes panel-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.case-heading {
  margin-bottom: 30px;
  padding-bottom: 28px;
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 30px;
  align-items: start;
  border-bottom: 1px solid var(--line);
}

.case-number {
  font: 700 10px var(--mono);
  letter-spacing: 0.1em;
}

.discovery-accent { color: var(--discovery); }
.counter-accent { color: var(--counter); }
.representation-accent { color: var(--representation); }
.transfer-accent { color: var(--transfer); }

.case-heading-copy {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 30px;
}

.case-question {
  max-width: 850px;
  margin: 0;
  font-size: clamp(20px, 2.3vw, 32px);
  line-height: 1.35;
  letter-spacing: -0.025em;
  font-weight: 680;
}

.case-tag,
.unit-chip {
  flex: 0 0 auto;
  padding: 7px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font: 8px var(--mono);
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.experiment-grid {
  display: grid;
  grid-template-columns: minmax(250px, 0.78fr) minmax(400px, 1.45fr) minmax(250px, 0.77fr);
  gap: 14px;
  align-items: stretch;
}

.control-card,
.visual-card,
.result-card {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel-raised);
}

.control-card,
.result-card {
  display: flex;
  flex-direction: column;
}

.visual-card {
  background: #0b0e12;
}

.card-head {
  min-height: 28px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.card-label {
  color: var(--muted);
  font: 9px var(--mono);
  letter-spacing: 0.1em;
}

.control-card h3,
.result-card h3 {
  margin: 11px 0 25px;
  font-size: 17px;
  letter-spacing: -0.02em;
}

.reset-button {
  min-width: 48px;
  min-height: 28px;
  padding: 0 8px;
  border: 0;
  color: var(--muted);
  background: transparent;
  font-size: 10px;
  cursor: pointer;
}

.reset-button:hover { color: var(--text); }

.range-control {
  display: block;
  margin-bottom: 24px;
}

.range-control > span {
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.range-control strong {
  font-size: 11px;
  font-weight: 620;
}

.range-control output {
  color: var(--text);
  font: 10px var(--mono);
}

input[type="range"] {
  width: 100%;
  height: 4px;
  margin: 0;
  appearance: none;
  border-radius: 999px;
  background: rgba(244, 245, 239, 0.13);
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  width: 17px;
  height: 17px;
  appearance: none;
  border: 4px solid var(--panel-raised);
  border-radius: 50%;
  background: var(--discovery);
  box-shadow: 0 0 0 1px var(--discovery), 0 0 14px rgba(100, 220, 255, 0.28);
}

input[type="range"]::-moz-range-thumb {
  width: 10px;
  height: 10px;
  border: 4px solid var(--panel-raised);
  border-radius: 50%;
  background: var(--discovery);
  box-shadow: 0 0 0 1px var(--discovery);
}

.counter-range input[type="range"]::-webkit-slider-thumb { background: var(--counter); box-shadow: 0 0 0 1px var(--counter); }
.counter-range input[type="range"]::-moz-range-thumb { background: var(--counter); box-shadow: 0 0 0 1px var(--counter); }
.representation-range input[type="range"]::-webkit-slider-thumb { background: var(--representation); box-shadow: 0 0 0 1px var(--representation); }
.representation-range input[type="range"]::-moz-range-thumb { background: var(--representation); box-shadow: 0 0 0 1px var(--representation); }

.range-control > small {
  margin-top: 8px;
  display: flex;
  justify-content: space-between;
  color: rgba(146, 154, 164, 0.7);
  font: 8px var(--mono);
}

.switch-row {
  position: relative;
  min-height: 65px;
  margin-bottom: 20px;
  padding: 13px 55px 13px 13px;
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
}

.switch-row span,
.switch-row strong,
.switch-row small {
  display: block;
}

.switch-row strong { font-size: 10px; }
.switch-row small { margin-top: 5px; color: var(--muted); font-size: 8px; line-height: 1.45; }

.switch-row input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.switch-row > i {
  position: absolute;
  right: 13px;
  top: 50%;
  width: 31px;
  height: 18px;
  border-radius: 999px;
  background: rgba(244, 245, 239, 0.15);
  transform: translateY(-50%);
  transition: background 0.18s ease;
}

.switch-row > i::after {
  content: "";
  position: absolute;
  width: 12px;
  height: 12px;
  left: 3px;
  top: 3px;
  border-radius: 50%;
  background: #d8dbe0;
  transition: transform 0.18s ease;
}

.switch-row input:checked + i { background: rgba(100, 220, 255, 0.42); }
.switch-row input:checked + i::after { transform: translateX(13px); background: var(--discovery); }
.switch-row input:focus-visible + i { outline: 2px solid var(--acid); outline-offset: 3px; }

.data-preview {
  margin-bottom: 22px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.data-preview div {
  padding: 11px 8px;
  border-right: 1px solid var(--line);
  text-align: center;
}

.data-preview div:last-child { border-right: 0; }
.data-preview span,
.data-preview strong { display: block; }
.data-preview span { color: var(--muted); font-size: 8px; }
.data-preview strong { margin-top: 6px; font: 9px var(--mono); }

.run-button {
  min-height: 48px;
  margin-top: auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid currentColor;
  border-radius: 9px;
  color: var(--discovery);
  background: rgba(100, 220, 255, 0.045);
  font-size: 11px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease;
}

.run-button:hover { transform: translateY(-2px); background: rgba(100, 220, 255, 0.09); }
.run-button:disabled { opacity: 0.48; cursor: wait; transform: none; }
.run-button.is-running i { animation: run-arrow 0.45s ease infinite alternate; }
@keyframes run-arrow { to { transform: translateX(4px); } }
.counter-button { color: var(--counter); background: rgba(255, 155, 102, 0.045); }
.counter-button:hover { background: rgba(255, 155, 102, 0.09); }
.representation-button { color: var(--representation); background: rgba(195, 154, 255, 0.045); }
.representation-button:hover { background: rgba(195, 154, 255, 0.09); }
.transfer-button { color: var(--transfer); background: rgba(114, 239, 166, 0.045); }
.transfer-button:hover { background: rgba(114, 239, 166, 0.09); }

.live-indicator {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--discovery);
  font: 8px var(--mono);
  letter-spacing: 0.08em;
}

.live-indicator.purple { color: var(--representation); }

.graph-card canvas,
.transfer-card canvas {
  width: 100%;
  height: 300px;
  display: block;
}

.graph-legend,
.transfer-legend {
  margin: 2px 0 15px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted);
  font-size: 8px;
}

.graph-legend span,
.transfer-legend span {
  display: flex;
  align-items: center;
  gap: 7px;
}

.graph-legend i {
  width: 22px;
  height: 0;
  border-top: 1px solid var(--discovery);
}

.graph-legend .dashed-line { border-top: 1px dashed var(--danger); }

.test-readout,
.counter-equation {
  padding: 13px 14px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 11px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.025);
}

.test-readout span,
.counter-equation span {
  color: var(--muted);
  font-size: 8px;
}

.test-readout code,
.counter-equation code {
  overflow: hidden;
  color: #d7dce2;
  font: 9px var(--mono);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.test-readout strong,
.counter-equation strong {
  font: 8px var(--mono);
  white-space: nowrap;
}

.test-readout .pass { color: var(--transfer); }
.test-readout .warn { color: var(--danger); }

.result-kpi {
  margin: 18px 0 2px;
  font: 750 clamp(34px, 3.6vw, 52px)/1 var(--mono);
  letter-spacing: -0.07em;
}

.result-card h3 { margin-top: 4px; margin-bottom: 14px; }

.result-card > p {
  margin: 0 0 22px;
  color: #a7aeb7;
  font-size: 11px;
  line-height: 1.7;
}

.result-list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.result-list > div {
  padding: 11px 0;
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 9px;
}

.result-list dt { color: var(--muted); }
.result-list dd { margin: 0; text-align: right; font-family: var(--mono); }

.caveat {
  margin-top: auto;
  padding-top: 22px;
}

.caveat strong {
  display: inline-block;
  margin-bottom: 7px;
  padding: 3px 6px;
  border: 1px solid rgba(255, 114, 121, 0.28);
  border-radius: 4px;
  color: var(--danger);
  font: 8px var(--mono);
}

.caveat p {
  margin: 0;
  color: var(--muted);
  font-size: 9px;
  line-height: 1.55;
}

.locked-noise {
  margin-bottom: 22px;
  padding: 11px;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  border: 1px solid rgba(255, 155, 102, 0.2);
  border-radius: 10px;
  background: rgba(255, 155, 102, 0.035);
}

.locked-noise > span {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border: 1px solid var(--counter);
  border-radius: 50%;
  color: var(--counter);
  font: 11px var(--mono);
}

.locked-noise p,
.locked-noise strong,
.locked-noise small { display: block; margin: 0; }
.locked-noise strong { font-size: 9px; }
.locked-noise small { margin-top: 4px; color: var(--muted); font-size: 7px; line-height: 1.35; }
.locked-noise b { color: var(--counter); font: 7px var(--mono); }

.twin-card {
  display: flex;
  flex-direction: column;
}

.twin-worlds {
  flex: 1;
  min-height: 330px;
  padding: 22px 0 18px;
  display: grid;
  grid-template-columns: 1fr 74px 1fr;
  align-items: center;
}

.world {
  min-width: 0;
  text-align: center;
}

.world-label {
  display: inline-block;
  margin-bottom: 22px;
  padding: 5px 8px;
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.05);
  font: 8px var(--mono);
}

.machine-orbit {
  position: relative;
  width: 108px;
  height: 108px;
  margin: 0 auto 13px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 155, 102, 0.3);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 155, 102, 0.1), transparent 60%);
}

.machine-orbit::before,
.machine-orbit::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  border: 1px dashed rgba(255, 155, 102, 0.18);
}

.machine-orbit::before { inset: -7px 10px; transform: rotate(32deg); }
.machine-orbit::after { inset: 10px -7px; transform: rotate(-28deg); }
.machine-orbit span { color: var(--counter); font: 700 24px var(--mono); }

.world > strong {
  display: block;
  color: var(--counter);
  font: 700 34px var(--mono);
  letter-spacing: -0.05em;
}

.world > p { margin: 3px 0 8px; color: var(--muted); font-size: 9px; }
.world > small { color: #c3c8ce; font: 8px var(--mono); }

.risk-progress,
.vector-progress {
  width: min(150px, 82%);
  height: 5px;
  margin: 0 auto 10px;
  display: block;
  appearance: none;
  border: 0;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(244, 245, 239, 0.1);
}

.risk-progress::-webkit-progress-bar,
.vector-progress::-webkit-progress-bar { background: rgba(244, 245, 239, 0.1); }
.risk-progress::-webkit-progress-value { background: var(--danger); }
.risk-progress::-moz-progress-bar { background: var(--danger); }
.counter-progress::-webkit-progress-value { background: var(--counter); }
.counter-progress::-moz-progress-bar { background: var(--counter); }

.world-bridge {
  display: grid;
  place-items: center;
  gap: 10px;
  color: var(--counter);
}

.world-bridge span { color: var(--muted); font: 7px var(--mono); }
.world-bridge i { font: 24px var(--mono); }

.counter-equation {
  border-color: rgba(255, 155, 102, 0.18);
}

.counter-equation strong { color: var(--counter); }

.environment-picker {
  margin: 0 0 23px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  border: 0;
}

.environment-picker legend {
  margin-bottom: 10px;
  color: var(--text);
  font-size: 11px;
  font-weight: 620;
}

.environment-picker label { position: relative; cursor: pointer; }
.environment-picker input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.environment-picker label > span {
  min-height: 52px;
  padding: 8px 5px;
  display: grid;
  place-items: center;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  font-size: 7px;
  text-align: center;
}

.environment-picker input:checked + span {
  border-color: rgba(195, 154, 255, 0.55);
  color: var(--text);
  background: rgba(195, 154, 255, 0.07);
}

.environment-picker input:focus-visible + span { outline: 2px solid var(--acid); outline-offset: 2px; }

.env-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}
.env-a { background: var(--discovery); }
.env-b { background: var(--counter); }
.env-c { background: var(--representation); }

.representation-card {
  display: flex;
  flex-direction: column;
}

.signal-stage {
  margin-top: 16px;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #080a0d;
}

.signal-title {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font: 8px var(--mono);
}

.signal-title strong { color: var(--representation); font-weight: 600; }

#signalCanvas {
  width: 100%;
  height: 145px;
  display: block;
}

.encoder-comparison {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.encoder-comparison article {
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.018);
}

.encoder-comparison article > div:first-child {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 8px;
}

.encoder-comparison article > div:first-child strong { color: var(--danger); font: 8px var(--mono); }
.encoder-comparison .causal-vector { border-color: rgba(195, 154, 255, 0.24); }
.encoder-comparison .causal-vector > div:first-child strong { color: var(--representation); }
.encoder-comparison small { display: block; margin-top: 8px; color: var(--muted); font-size: 7px; }

.vector-progress {
  width: 100%;
  margin: 12px 0 0;
}
.baseline-vector::-webkit-progress-value { background: var(--danger); }
.baseline-vector::-moz-progress-bar { background: var(--danger); }
.causal-progress::-webkit-progress-value { background: var(--representation); }
.causal-progress::-moz-progress-bar { background: var(--representation); }

.factor-chips {
  margin-top: 12px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.factor-chips span {
  padding: 10px;
  display: flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  font-size: 8px;
}

.factor-chips i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--representation);
}

.factor-chips strong { margin-left: auto; color: var(--text); font: 8px var(--mono); }

.domain-cards {
  margin-bottom: 21px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 8px;
  align-items: center;
}

.domain-cards > article {
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
}

.domain-cards > i { color: var(--transfer); font-style: normal; }
.domain-cards article > span,
.domain-cards article > strong { display: block; }
.domain-cards article > span { color: var(--transfer); font: 7px var(--mono); }
.domain-cards article > strong { margin: 5px 0 9px; font-size: 11px; }
.domain-cards dl { margin: 0; }
.domain-cards dl div { margin-top: 5px; display: flex; justify-content: space-between; gap: 5px; font-size: 7px; }
.domain-cards dt { color: var(--muted); }
.domain-cards dd { margin: 0; color: #cfd3d8; }

.transfer-card canvas { height: 290px; }

.model-scoreboard {
  margin-top: 8px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.model-scoreboard article {
  padding: 13px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.model-scoreboard span { color: var(--muted); font-size: 8px; }
.model-scoreboard strong { font: 700 22px var(--mono); letter-spacing: -0.05em; }
.model-scoreboard small { grid-column: 1 / -1; color: var(--muted); font: 7px var(--mono); }
.baseline-score strong { color: #a9afb8; }
.causal-score { border-color: rgba(114, 239, 166, 0.25) !important; }
.causal-score strong { color: var(--transfer); }

.transfer-legend { margin: 12px 2px 0; }
.transfer-legend i { width: 14px; height: 3px; background: #767e88; }
.transfer-legend span:last-child i { background: var(--transfer); }

.api-insight {
  position: relative;
  overflow: hidden;
  margin-top: 14px;
  padding: 22px;
  border: 1px solid color-mix(in srgb, var(--case-accent) 28%, var(--line));
  border-radius: var(--radius-md);
  background:
    linear-gradient(125deg, color-mix(in srgb, var(--case-accent) 5%, transparent), transparent 48%),
    var(--panel-raised);
}

.api-insight::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--case-accent);
}

.api-insight-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.api-insight-head h3 {
  margin: 8px 0 0;
  font-size: 16px;
  letter-spacing: -0.02em;
}

.api-state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font: 8px var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.api-state i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.api-insight[data-state="loading"] .api-state { color: var(--case-accent); }
.api-insight[data-state="success"] .api-state { color: var(--transfer); }
.api-insight[data-state="error"] .api-state { color: var(--danger); }
.api-insight[data-state="stale"] .api-state { color: var(--counter); }

.api-state-panel { display: none; }
.api-insight[data-state="idle"] .api-idle-state,
.api-insight[data-state="loading"] .api-loading-state,
.api-insight[data-state="success"] .api-success-state,
.api-insight[data-state="error"] .api-error-state,
.api-insight[data-state="stale"] .api-stale-state { display: grid; }

.api-idle-state {
  min-height: 72px;
  margin-top: 17px;
  place-items: center start;
  border-top: 1px solid var(--line);
}

.api-idle-state p {
  max-width: 780px;
  margin: 17px 0 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.65;
}

.api-loading-state,
.api-stale-state {
  min-height: 92px;
  margin-top: 17px;
  grid-template-columns: auto 1fr;
  gap: 17px;
  align-items: center;
  border-top: 1px solid var(--line);
}

.thinking-mark {
  width: 50px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: 1px solid color-mix(in srgb, var(--case-accent) 35%, transparent);
  border-radius: 9px;
}

.thinking-mark i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--case-accent);
  animation: thinking 0.75s ease-in-out infinite alternate;
}

.thinking-mark i:nth-child(2) { animation-delay: 0.16s; }
.thinking-mark i:nth-child(3) { animation-delay: 0.32s; }

@keyframes thinking {
  from { opacity: 0.25; transform: translateY(2px); }
  to { opacity: 1; transform: translateY(-2px); }
}

.api-loading-state p,
.api-loading-state strong,
.api-loading-state small,
.api-stale-state p,
.api-stale-state strong,
.api-stale-state small { display: block; margin: 0; }
.api-loading-state strong,
.api-stale-state strong { font-size: 11px; }
.api-loading-state small,
.api-stale-state small { margin-top: 5px; color: var(--muted); font-size: 9px; }

.api-success-state {
  margin-top: 20px;
  grid-template-columns: minmax(0, 1.15fr) minmax(240px, 0.85fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(7, 9, 12, 0.5);
}

.api-analysis-main,
.api-analysis-evidence,
.api-analysis-notes {
  padding: 18px;
}

.api-analysis-main { border-right: 1px solid var(--line); }
.api-analysis-main > span,
.api-analysis-evidence > span,
.api-analysis-notes article > span {
  color: var(--case-accent);
  font: 8px var(--mono);
  letter-spacing: 0.08em;
}

.api-analysis-main h4 {
  margin: 10px 0 9px;
  font-size: 18px;
  letter-spacing: -0.025em;
}

.api-analysis-main p,
.api-analysis-notes p {
  margin: 0;
  color: #afb5bd;
  font-size: 10px;
  line-height: 1.7;
}

.api-analysis-evidence ul {
  margin: 11px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
  list-style: none;
}

.api-analysis-evidence li {
  position: relative;
  padding-left: 13px;
  color: #d2d6db;
  font-size: 9px;
  line-height: 1.55;
}

.api-analysis-evidence li::before {
  content: "";
  position: absolute;
  width: 5px;
  height: 5px;
  left: 0;
  top: 5px;
  border-radius: 50%;
  background: var(--case-accent);
}

.api-analysis-notes {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
}

.api-analysis-notes article:first-child { padding-right: 18px; border-right: 1px solid var(--line); }
.api-analysis-notes article:last-child { padding-left: 18px; }
.api-analysis-notes p { margin-top: 7px; }

.api-success-state footer {
  grid-column: 1 / -1;
  padding: 10px 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 7px var(--mono);
}

.api-error-state {
  min-height: 92px;
  margin-top: 17px;
  padding-top: 17px;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  border-top: 1px solid var(--line);
}

.api-error-icon,
.api-stale-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  color: var(--danger);
  font: 700 13px var(--mono);
}

.api-stale-icon { color: var(--counter); }
.api-error-state strong { font-size: 11px; }
.api-error-state p { margin: 5px 0 0; color: var(--muted); font-size: 9px; line-height: 1.5; }

.api-retry-button {
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid var(--danger);
  border-radius: 8px;
  color: var(--danger);
  background: rgba(255, 114, 121, 0.04);
  font-size: 9px;
  cursor: pointer;
}

.api-retry-button:hover { background: rgba(255, 114, 121, 0.1); }

.capability-map {
  padding: 100px 0 120px;
  border-top: 1px solid var(--line);
}

.map-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.map-grid article {
  min-height: 245px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
  background: rgba(16, 19, 24, 0.7);
}

.map-grid article:last-child { border-right: 0; }
.map-grid article > span { color: var(--acid); font: 10px var(--mono); }
.map-grid h3 { margin: 35px 0 25px; font-size: 17px; }
.map-grid p { margin: 0 0 8px; color: var(--muted); font-size: 10px; }
.map-grid strong { font-size: 11px; }
.map-grid small { margin-top: auto; color: rgba(146, 154, 164, 0.65); font: 8px var(--mono); }

.lab-footer {
  width: min(1480px, calc(100% - 48px));
  min-height: 100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 30px;
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font: 8px var(--mono);
  letter-spacing: 0.08em;
}

.lab-footer p { margin: 0; }
.lab-footer p:first-child { color: var(--text); }
.lab-footer p:first-child span { margin-right: 10px; color: var(--acid); }
.lab-footer a { justify-self: end; color: var(--muted); text-decoration: none; }
.lab-footer a:hover { color: var(--acid); }

.toast {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 40;
  max-width: min(380px, calc(100% - 44px));
  padding: 13px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  color: var(--text);
  background: #1a1f25;
  box-shadow: 0 18px 55px rgba(0, 0, 0, 0.45);
  font-size: 10px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.toast.is-visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1180px) {
  .hero { grid-template-columns: 1fr; }
  .hero-copy { max-width: 900px; }
  .hero-system { width: min(720px, 100%); }
  .experiment-grid { grid-template-columns: minmax(250px, 0.85fr) minmax(430px, 1.4fr); }
  .result-card { grid-column: 1 / -1; display: grid; grid-template-columns: minmax(200px, 0.55fr) minmax(300px, 1fr); column-gap: 28px; }
  .result-card .card-head,
  .result-card .result-kpi,
  .result-card h3,
  .result-card > p { grid-column: 1; }
  .result-card .result-list { grid-column: 2; grid-row: 1 / span 4; }
  .result-card .caveat { grid-column: 1 / -1; padding-top: 15px; }
}

@media (max-width: 900px) {
  .lab-header,
  main,
  .lab-footer { width: min(100% - 30px, 1480px); }
  .hero { min-height: auto; padding-top: 72px; }
  .case-tabs { grid-template-columns: 1fr 1fr; }
  .case-tab:nth-child(2) { border-right: 0; }
  .case-tab:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .case-heading { grid-template-columns: 1fr; gap: 15px; }
  .experiment-grid { grid-template-columns: 1fr; }
  .result-card { grid-column: auto; display: flex; }
  .result-card .card-head,
  .result-card .result-kpi,
  .result-card h3,
  .result-card > p,
  .result-card .result-list,
  .result-card .caveat { grid-column: auto; grid-row: auto; }
  .map-grid { grid-template-columns: 1fr 1fr; }
  .map-grid article:nth-child(2) { border-right: 0; }
  .map-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .api-success-state { grid-template-columns: 1fr; }
  .api-analysis-main { border-right: 0; border-bottom: 1px solid var(--line); }
}

@media (max-width: 620px) {
  .lab-header { height: 70px; }
  .brand-copy strong { font-size: 9px; }
  .header-status { font-size: 8px; }
  .hero { padding: 55px 0 75px; gap: 45px; }
  .hero h1 { font-size: clamp(40px, 13vw, 60px); }
  .hero-intro { font-size: 13px; }
  .hero-system { min-height: auto; padding: 16px; }
  .system-flow { min-height: 230px; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .system-node { width: 100%; height: 102px; }
  .system-arrow { display: none; }
  .node-observe,
  .node-intervene,
  .node-counter,
  .node-transfer { transform: none; }
  .system-readout { grid-template-columns: 1fr; }
  .system-readout div { padding: 9px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .system-readout div:last-child { border-bottom: 0; }
  .section-intro,
  .map-heading { grid-template-columns: 1fr; gap: 18px; }
  .case-section { padding: 66px 0 85px; }
  .case-tabs { grid-template-columns: 1fr; }
  .case-tab { min-height: 84px; border-right: 0; border-bottom: 1px solid var(--line); }
  .case-tab:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .case-tab:last-child { border-bottom: 0; }
  .case-heading-copy { display: grid; gap: 14px; }
  .case-tag { justify-self: start; }
  .case-panel { padding: 18px; }
  .control-card,
  .visual-card,
  .result-card { padding: 17px; }
  .graph-card canvas,
  .transfer-card canvas { height: 250px; }
  .test-readout,
  .counter-equation { grid-template-columns: 1fr; }
  .test-readout code,
  .counter-equation code { white-space: normal; }
  .twin-worlds { min-height: 290px; grid-template-columns: 1fr 40px 1fr; }
  .machine-orbit { width: 82px; height: 82px; }
  .world > strong { font-size: 27px; }
  .encoder-comparison,
  .factor-chips { grid-template-columns: 1fr; }
  .api-insight { padding: 17px; }
  .api-insight-head { display: grid; gap: 12px; }
  .api-success-state,
  .api-analysis-notes { grid-template-columns: 1fr; }
  .api-analysis-notes article:first-child { padding: 0 0 14px; border-right: 0; border-bottom: 1px solid var(--line); }
  .api-analysis-notes article:last-child { padding: 14px 0 0; }
  .api-error-state { grid-template-columns: auto 1fr; }
  .api-retry-button { grid-column: 1 / -1; width: 100%; }
  .map-grid { grid-template-columns: 1fr; }
  .map-grid article { min-height: 195px; border-right: 0; border-bottom: 1px solid var(--line); }
  .map-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .map-grid article:last-child { border-bottom: 0; }
  .lab-footer { padding: 25px 0; grid-template-columns: 1fr; gap: 12px; }
  .lab-footer a { justify-self: start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}