:root {
  --void: #08090d;
  --void-soft: #0f1118;
  --panel: rgba(12, 14, 20, 0.9);
  --panel-solid: #11131a;
  --paper: #f0eee8;
  --paper-muted: #c0c1c5;
  --muted: #8d94a2;
  --faint: #68707e;
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(255, 255, 255, 0.24);
  --ember: #ff7b32;
  --ember-hot: #ffd39a;
  --electric: #75a7ff;
  --danger: #ff5f52;
  --panel-width: 392px;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ease: cubic-bezier(.22, .7, .2, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--void);
}

body {
  margin: 0;
  color: var(--paper);
  background: var(--void);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body:has(dialog[open]) {
  overflow: hidden;
}

button, input, select {
  font: inherit;
}

button, select, input[type="range"], input[type="checkbox"], input[type="radio"] {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
a:focus-visible,
summary:focus-visible,
canvas:focus-visible {
  outline: 2px solid var(--ember-hot);
  outline-offset: 3px;
}

a {
  color: inherit;
}

::selection {
  color: #090a0e;
  background: var(--ember-hot);
}

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--paper);
  background: var(--panel-solid);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 12px;
  text-decoration: none;
  transform: translateY(-180%);
  transition: transform 160ms ease;
}

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

.noscript-note {
  position: relative;
  z-index: 100;
  padding: 12px 18px;
  color: #1b120a;
  background: var(--ember-hot);
  font: 600 12px/1.5 var(--mono);
  text-align: center;
}

.sim-shell {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  isolation: isolate;
  background: #08090d;
}

.sim-shell:has(#simCanvas:focus-visible)::after {
  position: absolute;
  z-index: 19;
  inset: 4px;
  border: 2px solid var(--ember-hot);
  border-radius: 4px;
  pointer-events: none;
  content: "";
}

#simCanvas,
#researchCanvas,
#proceduralCompareCanvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  min-height: 100svh;
}

#simCanvas {
  z-index: 0;
  touch-action: pan-y;
  background:
    radial-gradient(circle at 45% 46%, #191b25 0, #0c0e14 48%, #07080b 100%);
}

#researchCanvas {
  z-index: 1;
  pointer-events: none;
  opacity: 0;
  background: transparent;
  transition: opacity 180ms ease;
}

#researchCanvas.is-active {
  opacity: 1;
}

#proceduralCompareCanvas {
  z-index: 1;
  display: none;
  pointer-events: none;
}

body.compare-renderers #proceduralCompareCanvas {
  display: block;
  right: auto;
  left: 0;
  width: 50%;
}

body.compare-renderers #simCanvas,
body.compare-renderers #researchCanvas {
  right: auto;
  left: 50%;
  width: 50%;
}

.renderer-comparison {
  position: absolute;
  z-index: 4;
  inset: 0;
  pointer-events: none;
}

.renderer-comparison[hidden] {
  display: none;
}

.renderer-comparison__divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: rgba(255, 255, 255, .68);
  box-shadow: 0 0 18px rgba(255, 122, 48, .28);
}

.renderer-comparison__label {
  position: absolute;
  top: max(76px, calc(env(safe-area-inset-top) + 60px));
  padding: 8px 11px;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 999px;
  color: #f8f5ef;
  background: rgba(6, 8, 12, .82);
  box-shadow: 0 8px 26px rgba(0, 0, 0, .28);
  font: 600 10px/1 var(--mono);
  letter-spacing: .08em;
  text-transform: uppercase;
  backdrop-filter: blur(10px);
}

.renderer-comparison__label--old {
  left: 24px;
}

.renderer-comparison__label--new {
  right: 24px;
}

.renderer-comparison__fallback {
  position: absolute;
  top: max(116px, calc(env(safe-area-inset-top) + 100px));
  right: 24px;
  max-width: min(420px, calc(50% - 48px));
  padding: 7px 9px;
  border: 1px solid rgba(255, 105, 72, .34);
  border-radius: 7px;
  color: #ffd4c8;
  background: rgba(34, 8, 4, .84);
  font: 500 9px/1.45 var(--mono);
}

.renderer-comparison__fallback[hidden] {
  display: none;
}

.fluid-debug-overlay {
  position: absolute;
  z-index: 45;
  top: max(82px, calc(env(safe-area-inset-top) + 66px));
  left: 18px;
  width: min(370px, calc(100vw - 36px));
  max-height: calc(100svh - 112px);
  overflow: auto;
  padding: 14px;
  border: 1px solid rgba(114, 243, 209, .4);
  border-radius: 12px;
  color: #f5f7f4;
  background: rgba(4, 10, 13, .9);
  box-shadow: 0 18px 48px rgba(0, 0, 0, .42), inset 0 0 42px rgba(70, 210, 179, .035);
  font-family: var(--mono);
  backdrop-filter: blur(14px);
}

.fluid-debug-overlay[hidden] {
  display: none;
}

.fluid-debug-overlay__head,
.fluid-debug-overlay__view {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.fluid-debug-overlay__head {
  margin-bottom: 11px;
  color: #72f3d1;
  font-size: 11px;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.fluid-debug-overlay__head span {
  color: rgba(231, 238, 235, .55);
  font-size: 9px;
  font-weight: 500;
}

.fluid-debug-overlay__view {
  padding-bottom: 11px;
  border-bottom: 1px solid rgba(255, 255, 255, .11);
  color: rgba(231, 238, 235, .7);
  font-size: 10px;
}

.fluid-debug-overlay__view select {
  width: min(220px, 66%);
  min-height: 34px;
  color: #f8faf8;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 7px;
  background: #111b1d;
  font: 500 10px/1.2 var(--mono);
}

.fluid-debug-overlay__metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 11px 0 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 8px;
  background: rgba(255, 255, 255, .08);
}

.fluid-debug-overlay__metrics div {
  min-width: 0;
  padding: 8px 9px;
  background: rgba(6, 12, 15, .92);
}

.fluid-debug-overlay__metrics dt {
  margin-bottom: 3px;
  color: rgba(231, 238, 235, .48);
  font-size: 8px;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.fluid-debug-overlay__metrics dd {
  margin: 0;
  overflow-wrap: anywhere;
  color: #f5f7f4;
  font-size: 10px;
  line-height: 1.35;
}

.fluid-debug-overlay__metrics .fluid-debug-overlay__wide {
  grid-column: 1 / -1;
}

.fluid-debug-overlay__metrics #debugActiveRenderer {
  color: #72f3d1;
  font-weight: 700;
}

.grain {
  position: absolute;
  z-index: 2;
  inset: 0;
  pointer-events: none;
  opacity: .16;
  background:
    repeating-linear-gradient(0deg, transparent 0 3px, rgba(255, 255, 255, .016) 3px 4px),
    repeating-linear-gradient(90deg, transparent 0 7px, rgba(255, 255, 255, .009) 7px 8px),
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, .035), transparent 30%);
  mix-blend-mode: overlay;
}

.lab-topbar {
  position: absolute;
  z-index: 20;
  top: max(14px, env(safe-area-inset-top));
  right: 18px;
  left: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  pointer-events: none;
  transition: opacity 200ms ease, transform 200ms var(--ease);
}

.lab-topbar > * {
  pointer-events: auto;
}

.lab-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  color: var(--paper);
  font: 600 10px/1 var(--mono);
  letter-spacing: .11em;
  text-decoration: none;
  text-transform: uppercase;
}

.lab-brand__mark {
  width: 10px;
  height: 10px;
  border: 1px solid var(--ember-hot);
  border-radius: 50%;
  background: var(--ember);
  box-shadow: 0 0 18px rgba(255, 123, 50, .78);
}

.lab-brand__series {
  color: var(--muted);
  font-weight: 400;
}

.telemetry {
  position: absolute;
  left: 50%;
  display: flex;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(7, 9, 13, .68);
  box-shadow: 0 14px 50px rgba(0, 0, 0, .26);
  backdrop-filter: blur(18px) saturate(130%);
  transform: translateX(-50%);
}

.telemetry__item {
  display: flex;
  align-items: baseline;
  gap: 7px;
  min-height: 36px;
  padding: 0 12px;
  border-right: 1px solid var(--line);
  font-family: var(--mono);
  text-transform: uppercase;
}

.telemetry__item:last-child {
  border-right: 0;
}

.telemetry__item small {
  color: var(--faint);
  font-size: 8px;
  letter-spacing: .08em;
}

.telemetry__item strong {
  min-width: 39px;
  color: var(--paper-muted);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .02em;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.topbar-link,
.icon-button,
.panel-toggle {
  min-height: 40px;
  padding: 0 13px;
  color: var(--paper-muted);
  background: rgba(7, 9, 13, .7);
  border: 1px solid var(--line);
  border-radius: 9px;
  font: 500 10px/1 var(--mono);
  letter-spacing: .06em;
  text-decoration: none;
  text-transform: uppercase;
  backdrop-filter: blur(16px);
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.topbar-link {
  display: inline-flex;
  align-items: center;
}

.topbar-link:hover,
.icon-button:hover,
.panel-toggle:hover {
  color: var(--paper);
  border-color: var(--line-strong);
  background: rgba(21, 24, 32, .86);
}

.intro-card {
  position: absolute;
  z-index: 8;
  top: 50%;
  left: clamp(22px, 5vw, 76px);
  width: min(610px, calc(100vw - var(--panel-width) - 130px));
  transform: translateY(-47%);
  transition: opacity 420ms ease, transform 500ms var(--ease), visibility 420ms;
}

.intro-card.is-dismissed {
  visibility: hidden;
  opacity: 0;
  transform: translateY(-43%) translateX(-20px);
  pointer-events: none;
}

.kicker {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 18px;
  color: var(--ember-hot);
  font: 500 10px/1.4 var(--mono);
  letter-spacing: .13em;
  text-transform: uppercase;
}

.kicker span {
  color: var(--ember);
  text-shadow: 0 0 12px rgba(255, 123, 50, .8);
}

.intro-card h1 {
  margin: 0;
  color: #f5f3ed;
  font-size: clamp(58px, 7.6vw, 126px);
  font-weight: 600;
  line-height: .78;
  letter-spacing: -.075em;
  text-wrap: balance;
  text-transform: uppercase;
  text-shadow: 0 8px 40px rgba(0, 0, 0, .42);
}

.intro-card h1 em {
  color: transparent;
  -webkit-text-stroke: 1px rgba(244, 240, 229, .48);
  font-style: normal;
  font-weight: 500;
}

.intro-card__lead {
  max-width: 620px;
  margin: 30px 0 0;
  color: rgba(245, 243, 237, .84);
  font-size: clamp(16px, 1.45vw, 21px);
  line-height: 1.55;
  text-wrap: pretty;
}

.intro-card__disclaimer {
  max-width: 590px;
  margin: 15px 0 0;
  color: var(--muted);
  font: 400 10px/1.65 var(--mono);
  letter-spacing: .015em;
}

.intro-card__actions {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 26px;
}

.detonate {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 11px;
  width: 100%;
  min-height: 52px;
  padding: 0 20px;
  overflow: hidden;
  color: #130b06;
  background: linear-gradient(135deg, #ffd39a, #ff7b32 54%, #ff542f);
  border: 0;
  border-radius: 10px;
  box-shadow: 0 12px 34px rgba(255, 92, 42, .22), inset 0 1px rgba(255, 255, 255, .5);
  font: 700 11px/1 var(--mono);
  letter-spacing: .13em;
  text-transform: uppercase;
  transition: transform 160ms var(--ease), box-shadow 160ms ease, filter 160ms ease;
}

.detonate::after {
  position: absolute;
  inset: -40%;
  background: linear-gradient(100deg, transparent 30%, rgba(255, 255, 255, .38), transparent 66%);
  content: "";
  transform: translateX(-80%) rotate(10deg);
  transition: transform 500ms var(--ease);
}

.detonate:hover {
  filter: saturate(1.12) brightness(1.05);
  box-shadow: 0 15px 42px rgba(255, 92, 42, .34), inset 0 1px rgba(255, 255, 255, .6);
  transform: translateY(-2px);
}

.detonate:hover::after {
  transform: translateX(80%) rotate(10deg);
}

.detonate:active {
  transform: translateY(0) scale(.985);
}

.detonate > span {
  width: 10px;
  height: 10px;
  border: 2px solid currentColor;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(25, 12, 6, .14);
}

.detonate--hero {
  width: auto;
  min-width: 172px;
  min-height: 56px;
}

.text-button {
  min-height: 44px;
  padding: 0;
  color: var(--paper-muted);
  background: none;
  border: 0;
  font: 500 11px/1 var(--mono);
  letter-spacing: .04em;
}

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

.control-panel {
  position: absolute;
  z-index: 30;
  top: 70px;
  right: 18px;
  bottom: 72px;
  display: flex;
  flex-direction: column;
  width: min(var(--panel-width), calc(100vw - 36px));
  overflow: hidden;
  color: var(--paper);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 17px;
  box-shadow: 0 28px 90px rgba(0, 0, 0, .4);
  backdrop-filter: blur(26px) saturate(130%);
  transition: opacity 240ms ease, transform 280ms var(--ease), visibility 240ms;
}

.control-panel.is-closed {
  visibility: hidden;
  opacity: 0;
  transform: translateX(calc(100% + 30px));
  pointer-events: none;
}

.panel-head {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: space-between;
  min-height: 66px;
  padding: 0 16px 0 18px;
  border-bottom: 1px solid var(--line);
}

.panel-head > div {
  display: grid;
  gap: 4px;
}

.panel-head strong {
  font-size: 14px;
  font-weight: 600;
}

.panel-head__index {
  color: var(--ember);
  font: 500 8px/1 var(--mono);
  letter-spacing: .14em;
}

.panel-close,
.dialog-close {
  display: grid;
  width: 36px;
  height: 36px;
  padding: 0;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: 300 22px/1 var(--sans);
  place-items: center;
}

.panel-close:hover,
.dialog-close:hover {
  color: var(--paper);
  border-color: var(--line-strong);
}

.panel-scroll {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-color: rgba(255, 255, 255, .18) transparent;
  scrollbar-width: thin;
}

.control-group {
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.control-group:last-child {
  border-bottom: 0;
}

.control-group__heading {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 15px;
  color: var(--paper-muted);
  font: 600 9px/1 var(--mono);
  letter-spacing: .11em;
  text-transform: uppercase;
}

.control-group__heading span {
  color: var(--ember);
}

.field {
  display: grid;
  gap: 7px;
}

.field--row {
  grid-template-columns: 1fr minmax(130px, auto);
  align-items: center;
  gap: 12px;
}

.field__label,
.range-field > span,
.timeline-field > span {
  color: var(--muted);
  font: 500 9px/1.4 var(--mono);
  letter-spacing: .04em;
}

.field select,
.field input[type="number"],
.range-field select {
  width: 100%;
  min-height: 40px;
  padding: 0 34px 0 11px;
  color: var(--paper);
  background-color: rgba(255, 255, 255, .055);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 12px;
}

.field input[type="number"] {
  padding-right: 9px;
  font-family: var(--mono);
}

.field select:hover,
.field input[type="number"]:hover {
  border-color: var(--line-strong);
}

.preset-description {
  min-height: 48px;
  margin: 11px 0 14px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.55;
  text-wrap: pretty;
}

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 3px;
  margin: 0;
  background: rgba(255, 255, 255, .045);
  border: 1px solid var(--line);
  border-radius: 9px;
}

.segmented label {
  position: relative;
}

.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented span {
  display: grid;
  min-height: 34px;
  padding: 0 7px;
  color: var(--muted);
  border-radius: 6px;
  font: 500 9px/1 var(--mono);
  text-align: center;
  place-items: center;
  transition: color 150ms ease, background 150ms ease;
}

.segmented input:checked + span {
  color: #130b06;
  background: var(--ember-hot);
  box-shadow: 0 4px 14px rgba(0, 0, 0, .2);
}

.segmented input:focus-visible + span {
  outline: 2px solid var(--ember-hot);
  outline-offset: 2px;
}

.transport {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 7px;
  margin: 9px 0 14px;
}

.transport button,
.seed-row button,
.export-buttons button,
#exportRetryButton {
  min-height: 38px;
  padding: 0 10px;
  color: var(--paper-muted);
  background: rgba(255, 255, 255, .045);
  border: 1px solid var(--line);
  border-radius: 8px;
  font: 500 9px/1 var(--mono);
  letter-spacing: .02em;
}

.transport button:hover,
.seed-row button:hover,
.export-buttons button:hover,
#exportRetryButton:hover {
  color: var(--paper);
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, .08);
}

.transport button[aria-pressed="true"] {
  color: #141009;
  background: var(--ember-hot);
  border-color: var(--ember-hot);
}

.timeline-field,
.range-field {
  display: grid;
  gap: 10px;
  margin: 15px 0;
}

.timeline-field > span,
.range-field > span {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
}

.timeline-field output,
.range-field output {
  color: var(--paper-muted);
  white-space: nowrap;
}

input[type="range"] {
  width: 100%;
  height: 20px;
  margin: 0;
  appearance: none;
  background: transparent;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 3px;
  background: linear-gradient(90deg, var(--ember), rgba(255, 255, 255, .16));
  border-radius: 99px;
}

input[type="range"]::-moz-range-track {
  height: 3px;
  background: rgba(255, 255, 255, .16);
  border-radius: 99px;
}

input[type="range"]::-moz-range-progress {
  height: 3px;
  background: var(--ember);
  border-radius: 99px;
}

input[type="range"]::-webkit-slider-thumb {
  width: 15px;
  height: 15px;
  margin-top: -6px;
  appearance: none;
  background: var(--paper);
  border: 3px solid #272019;
  border-radius: 50%;
  box-shadow: 0 0 0 1px var(--ember), 0 3px 9px rgba(0, 0, 0, .32);
}

input[type="range"]::-moz-range-thumb {
  width: 11px;
  height: 11px;
  background: var(--paper);
  border: 3px solid #272019;
  border-radius: 50%;
  box-shadow: 0 0 0 1px var(--ember), 0 3px 9px rgba(0, 0, 0, .32);
}

.phase-track {
  display: flex;
  gap: 2px;
  min-height: 22px;
  margin: -5px 0 14px;
}

.phase-track span {
  position: relative;
  min-width: 3px;
  height: 4px;
  background: rgba(255, 255, 255, .1);
  border-radius: 2px;
}

.phase-track span.is-past,
.phase-track span.is-current {
  background: var(--ember);
}

.phase-track span.is-current {
  box-shadow: 0 0 10px rgba(255, 123, 50, .7);
}

.field-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-top: 14px;
}

.research-diagnostics {
  background:
    linear-gradient(180deg, rgba(255, 129, 54, .055), transparent 72%),
    rgba(5, 7, 10, .22);
}

.diagnostic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin: 14px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.diagnostic-grid > div {
  min-width: 0;
  padding: 9px 10px;
  background: rgba(9, 11, 15, .94);
}

.diagnostic-grid dt {
  margin: 0 0 5px;
  color: var(--muted);
  font: 500 9px/1 var(--mono);
  letter-spacing: .07em;
  text-transform: uppercase;
}

.diagnostic-grid dd {
  min-height: 1em;
  margin: 0;
  overflow: hidden;
  color: var(--paper-muted);
  font: 500 10px/1.25 var(--mono);
  text-overflow: ellipsis;
  white-space: nowrap;
}

[hidden] {
  display: none !important;
}

.microcopy {
  margin: 11px 0 0;
  color: var(--muted);
  font: 400 10px/1.55 var(--mono);
}

.seed-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 8px;
  margin-top: 14px;
}

.seed-row button {
  min-height: 40px;
}

.toggle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px;
}

.toggle-grid label {
  position: relative;
}

.toggle-grid input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.toggle-grid span {
  display: flex;
  align-items: center;
  min-height: 36px;
  padding: 0 9px 0 28px;
  color: var(--muted);
  background: rgba(255, 255, 255, .035);
  border: 1px solid var(--line);
  border-radius: 7px;
  font: 500 8px/1.25 var(--mono);
}

.toggle-grid span::before {
  position: absolute;
  left: 10px;
  width: 8px;
  height: 8px;
  background: rgba(255, 255, 255, .13);
  border-radius: 50%;
  content: "";
}

.toggle-grid input:checked + span {
  color: var(--paper-muted);
  border-color: rgba(255, 157, 80, .24);
}

.toggle-grid input:checked + span::before {
  background: var(--ember);
  box-shadow: 0 0 8px rgba(255, 123, 50, .7);
}

.toggle-grid input:focus-visible + span {
  outline: 2px solid var(--ember-hot);
  outline-offset: 2px;
}

.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: var(--muted);
  font: 500 9px/1.4 var(--mono);
}

.switch-row input {
  position: absolute;
  opacity: 0;
}

.switch-row i {
  position: relative;
  flex: 0 0 auto;
  width: 34px;
  height: 19px;
  background: rgba(255, 255, 255, .11);
  border: 1px solid var(--line);
  border-radius: 99px;
}

.switch-row i::after {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 11px;
  height: 11px;
  background: var(--muted);
  border-radius: 50%;
  content: "";
  transition: transform 150ms var(--ease), background 150ms ease;
}

.switch-row input:checked + i {
  background: rgba(255, 123, 50, .18);
  border-color: rgba(255, 123, 50, .45);
}

.switch-row input:checked + i::after {
  background: var(--ember-hot);
  transform: translateX(15px);
}

.switch-row input:focus-visible + i {
  outline: 2px solid var(--ember-hot);
  outline-offset: 3px;
}

.export-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 14px;
}

.export-buttons button {
  min-height: 42px;
}

.export-buttons .export-primary {
  color: #160c05;
  background: var(--ember-hot);
  border-color: var(--ember-hot);
  font-weight: 700;
}

.export-buttons .export-primary:hover {
  color: #160c05;
  background: #ffe1bb;
  border-color: #ffe1bb;
}

.sim-footer {
  position: absolute;
  z-index: 12;
  right: 18px;
  bottom: max(15px, env(safe-area-inset-bottom));
  left: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: rgba(210, 211, 216, .62);
  pointer-events: none;
  transition: opacity 200ms ease, transform 200ms var(--ease);
}

.sim-footer p {
  max-width: 680px;
  margin: 0;
  font: 400 11px/1.5 var(--mono);
  letter-spacing: .01em;
}

.sim-footer strong {
  color: rgba(255, 211, 154, .76);
  font-weight: 500;
}

.sim-footer__keys {
  display: flex;
  align-items: center;
  gap: 7px;
  font: 400 8px/1 var(--mono);
}

kbd {
  display: inline-grid;
  min-width: 23px;
  min-height: 22px;
  padding: 0 5px;
  color: var(--paper-muted);
  background: rgba(255, 255, 255, .06);
  border: 1px solid var(--line);
  border-bottom-color: rgba(255, 255, 255, .26);
  border-radius: 5px;
  font: inherit;
  place-items: center;
}

.toast {
  position: fixed;
  z-index: 120;
  bottom: max(22px, env(safe-area-inset-bottom));
  left: 50%;
  min-width: 180px;
  max-width: calc(100vw - 36px);
  padding: 11px 16px;
  color: var(--paper);
  background: rgba(13, 15, 21, .94);
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  box-shadow: 0 15px 44px rgba(0, 0, 0, .35);
  font: 500 10px/1.45 var(--mono);
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 14px);
  transition: opacity 180ms ease, transform 220ms var(--ease);
}

.toast.is-visible {
  opacity: 1;
  transform: translate(-50%, 0);
}

body:not(.interface-visible) .control-panel,
body:not(.interface-visible) .intro-card,
body:not(.interface-visible) .sim-footer {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

body:not(.interface-visible) .control-panel {
  transform: translateX(calc(100% + 30px));
}

body:not(.interface-visible) .lab-brand,
body:not(.interface-visible) .telemetry,
body:not(.interface-visible) .topbar-link,
body:not(.interface-visible) .panel-toggle {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

body:not(.interface-visible) .topbar-actions {
  margin-left: auto;
}

body:not(.interface-visible) .icon-button {
  display: block;
  color: var(--paper);
  border-color: var(--line-strong);
}

.learn {
  position: relative;
  z-index: 2;
  color: #171719;
  background: #f1efe9;
}

.learn__masthead,
.learn-section {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.learn__masthead {
  padding: clamp(82px, 11vw, 150px) 0 clamp(72px, 9vw, 120px);
  border-bottom: 2px solid #191919;
}

.learn__eyebrow,
.learn-section__index {
  margin: 0 0 18px;
  color: #d8461f;
  font: 600 10px/1.4 var(--mono);
  letter-spacing: .13em;
  text-transform: uppercase;
}

.learn__masthead h2,
.learn-section h2 {
  margin: 0;
  color: #171719;
  font-size: clamp(42px, 6.5vw, 92px);
  font-weight: 600;
  line-height: .95;
  letter-spacing: -.055em;
  text-wrap: balance;
}

.learn__masthead > p:last-child {
  max-width: 810px;
  margin: 36px 0 0 auto;
  color: #4d4d50;
  font-size: clamp(18px, 2vw, 25px);
  line-height: 1.55;
  text-wrap: pretty;
}

.learn-section {
  padding: clamp(72px, 9vw, 118px) 0;
  border-bottom: 1px solid rgba(23, 23, 25, .25);
}

.learn-section--grid {
  display: grid;
  grid-template-columns: minmax(250px, .8fr) minmax(360px, 1.2fr);
  gap: clamp(55px, 8vw, 130px);
}

.prose {
  color: #444449;
  font-size: 17px;
  line-height: 1.78;
}

.prose p {
  margin: 0 0 22px;
  text-wrap: pretty;
}

.prose h3 {
  margin: 40px 0 10px;
  color: #171719;
  font-size: 20px;
  letter-spacing: -.025em;
}

.prose h3:first-child {
  margin-top: 0;
}

.mode-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 54px;
}

.mode-cards article {
  min-height: 285px;
  padding: clamp(28px, 4vw, 48px);
  color: #f1efe9;
  background: #171719;
  border-top: 5px solid #e65327;
  box-shadow: 10px 10px 0 rgba(23, 23, 25, .14);
}

.mode-cards article:last-child {
  border-top-color: #426bff;
}

.mode-cards span,
.related-grid span {
  color: #a9a9ad;
  font: 500 9px/1.4 var(--mono);
  letter-spacing: .11em;
  text-transform: uppercase;
}

.mode-cards h3 {
  margin: 66px 0 18px;
  color: #fff;
  font-size: 30px;
  line-height: 1;
  letter-spacing: -.04em;
}

.mode-cards p {
  margin: 0;
  color: #bebec3;
  line-height: 1.65;
  text-wrap: pretty;
}

.learn-section--dark {
  width: 100%;
  padding-inline: max(24px, calc((100vw - 1180px) / 2));
  color: #efede7;
  background: #171719;
  border-bottom: 0;
}

.learn-section--dark .learn-section__index {
  color: #ff8a50;
}

.learn-section--dark h2 {
  max-width: 840px;
  color: #f2f0e9;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 66px;
  background: rgba(255, 255, 255, .15);
  border: 1px solid rgba(255, 255, 255, .15);
}

.concept-grid article {
  min-height: 230px;
  padding: clamp(28px, 4vw, 46px);
  background: #171719;
}

.concept-grid h3 {
  margin: 0 0 18px;
  color: #fff;
  font-size: 22px;
  letter-spacing: -.03em;
}

.concept-grid p {
  max-width: 470px;
  margin: 0;
  color: #a9a9af;
  line-height: 1.7;
  text-wrap: pretty;
}

.learn-section--warning {
  display: grid;
  grid-template-columns: minmax(260px, .85fr) minmax(380px, 1.15fr);
  gap: clamp(50px, 8vw, 130px);
}

.learn-section--warning > div:last-child {
  padding: clamp(25px, 4vw, 44px);
  background: #ffe1c9;
  border: 2px solid #171719;
  box-shadow: 9px 9px 0 #d84a22;
}

.learn-section--warning p {
  margin: 0 0 20px;
  color: #252326;
  font-size: 17px;
  line-height: 1.7;
}

.learn-section--warning ul {
  padding-left: 20px;
  margin: 0;
  color: #4b4545;
}

.learn-section--warning li + li {
  margin-top: 10px;
}

.faq-list {
  margin-top: 54px;
  border-top: 2px solid #171719;
}

.faq-list details {
  border-bottom: 1px solid rgba(23, 23, 25, .38);
}

.faq-list summary {
  position: relative;
  padding: 25px 60px 25px 0;
  color: #171719;
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 600;
  line-height: 1.35;
  list-style: none;
  cursor: pointer;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  position: absolute;
  top: 24px;
  right: 8px;
  content: "+";
  font: 400 28px/1 var(--mono);
  transition: transform 180ms ease;
}

.faq-list details[open] summary::after {
  transform: rotate(45deg);
}

.faq-list details p {
  max-width: 820px;
  padding: 0 0 28px;
  margin: 0;
  color: #535358;
  line-height: 1.75;
}

.related {
  display: grid;
  grid-template-columns: minmax(250px, .65fr) minmax(450px, 1.35fr);
  gap: clamp(45px, 8vw, 120px);
}

.related-grid {
  display: grid;
  gap: 14px;
}

.related-grid a {
  position: relative;
  display: block;
  padding: 28px 64px 28px 28px;
  color: #171719;
  background: #f8f6ef;
  border: 2px solid #171719;
  text-decoration: none;
  transition: color 180ms ease, background 180ms ease, transform 180ms var(--ease), box-shadow 180ms ease;
}

.related-grid a:hover {
  color: #f5f2eb;
  background: #171719;
  box-shadow: 8px 8px 0 #e65327;
  transform: translate(-3px, -3px);
}

.related-grid strong {
  display: block;
  margin-top: 14px;
  font-size: 24px;
  letter-spacing: -.03em;
}

.related-grid p {
  max-width: 540px;
  margin: 9px 0 0;
  color: #626267;
  line-height: 1.6;
}

.related-grid a:hover p,
.related-grid a:hover span {
  color: #b7b7bd;
}

.related-grid i {
  position: absolute;
  top: 28px;
  right: 28px;
  font: normal 22px/1 var(--mono);
}

.lab-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  padding: 58px max(24px, calc((100vw - 1180px) / 2));
  color: #aaaab0;
  background: #0b0c10;
  border-top: 1px solid rgba(255, 255, 255, .1);
  font: 400 11px/1.65 var(--mono);
}

.lab-footer strong {
  color: #f1efe9;
  font-size: 14px;
}

.lab-footer p {
  margin: 6px 0 0;
}

.lab-footer a {
  color: #ffd39a;
}

.export-dialog {
  width: min(620px, calc(100vw - 28px));
  max-height: min(88svh, 760px);
  padding: 0;
  overflow: hidden;
  color: var(--paper);
  background: rgba(15, 17, 23, .98);
  border: 1px solid var(--line-strong);
  border-radius: 18px;
  box-shadow: 0 40px 120px rgba(0, 0, 0, .72);
}

.export-dialog::backdrop {
  background: rgba(4, 5, 8, .78);
  backdrop-filter: blur(8px);
}

.export-dialog__shell {
  max-height: inherit;
  overflow-y: auto;
}

.export-dialog__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line);
}

.export-dialog__head span {
  color: var(--ember);
  font: 500 8px/1 var(--mono);
  letter-spacing: .13em;
  text-transform: uppercase;
}

.export-dialog__head h2 {
  margin: 6px 0 0;
  font-size: 27px;
  line-height: 1;
  letter-spacing: -.04em;
}

.export-dialog__body,
.export-progress,
.export-error {
  padding: 24px;
}

.export-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.export-grid__wide {
  grid-column: 1 / -1;
}

.dialog-toggles {
  display: grid;
  gap: 13px;
  padding: 17px 0;
  margin-top: 19px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.dialog-note {
  margin: 16px 0;
  color: var(--faint);
  font: 400 9px/1.6 var(--mono);
}

.dialog-submit {
  width: 100%;
  min-height: 50px;
  color: #170d06;
  background: linear-gradient(135deg, var(--ember-hot), var(--ember));
  border: 0;
  border-radius: 9px;
  font: 700 11px/1 var(--mono);
  letter-spacing: .09em;
  text-transform: uppercase;
}

.dialog-submit:hover {
  filter: brightness(1.08);
}

.export-progress {
  display: grid;
  justify-items: center;
  min-height: 380px;
  align-content: center;
  text-align: center;
}

.export-progress[hidden],
.export-error[hidden] {
  display: none;
}

.progress-orbit {
  position: relative;
  width: 70px;
  height: 70px;
  margin-bottom: 25px;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 50%;
}

.progress-orbit::before,
.progress-orbit::after {
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(255, 123, 50, .36);
  border-radius: 50%;
  content: "";
}

.progress-orbit::after {
  inset: 25px;
  background: var(--ember);
  border: 0;
  box-shadow: 0 0 24px rgba(255, 123, 50, .7);
}

.progress-orbit span {
  position: absolute;
  top: -3px;
  left: 31px;
  width: 7px;
  height: 7px;
  background: var(--ember-hot);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--ember);
  transform-origin: 4px 38px;
  animation: orbit 1.2s linear infinite;
}

@keyframes orbit {
  to { transform: rotate(360deg); }
}

.export-progress__stage {
  margin: 0;
  color: var(--paper);
  font-size: 20px;
  font-weight: 600;
}

.export-progress__detail {
  max-width: 390px;
  margin: 8px 0 20px;
  color: var(--muted);
  font-size: 12px;
}

.export-progress progress {
  width: min(380px, 100%);
  height: 5px;
  overflow: hidden;
  appearance: none;
  background: rgba(255, 255, 255, .1);
  border: 0;
  border-radius: 99px;
}

.export-progress progress::-webkit-progress-bar {
  background: rgba(255, 255, 255, .1);
}

.export-progress progress::-webkit-progress-value,
.export-progress progress::-moz-progress-bar {
  background: linear-gradient(90deg, var(--ember), var(--ember-hot));
}

#exportPercent {
  margin-top: 8px;
  color: var(--muted);
  font: 500 9px/1 var(--mono);
}

.cancel-button {
  min-height: 38px;
  padding: 0 18px;
  margin-top: 24px;
  color: var(--paper-muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: 500 9px/1 var(--mono);
}

.export-error {
  min-height: 330px;
}

.export-error strong {
  display: block;
  max-width: 420px;
  color: #ffb199;
  font-size: 20px;
  line-height: 1.35;
}

.export-error p {
  color: var(--muted);
  font-size: 13px;
}

.recovery-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 14px;
  margin: 8px 8px 12px 0;
  color: #160d07;
  background: var(--ember-hot);
  border-radius: 8px;
  font: 600 9px/1 var(--mono);
  text-decoration: none;
}

@media (max-width: 1080px) {
  .telemetry__item:first-child {
    display: none;
  }

  .intro-card {
    width: min(520px, calc(100vw - var(--panel-width) - 76px));
  }

  .intro-card h1 {
    font-size: clamp(52px, 7vw, 86px);
  }
}

@media (max-width: 760px) {
  :root {
    --panel-width: 100%;
  }

  .sim-shell {
    min-height: 100svh;
  }

  .lab-topbar {
    top: max(9px, env(safe-area-inset-top));
    right: 10px;
    left: 12px;
  }

  .fluid-debug-overlay {
    top: max(60px, calc(env(safe-area-inset-top) + 52px));
    left: 8px;
    width: min(350px, calc(100vw - 16px));
    max-height: calc(100svh - 76px);
    padding: 11px;
  }

  .fluid-debug-overlay__metrics {
    grid-template-columns: 1fr 1fr;
  }

  .renderer-comparison__label {
    top: max(58px, calc(env(safe-area-inset-top) + 50px));
    max-width: calc(50% - 18px);
    padding: 6px 8px;
    border-radius: 7px;
    font-size: 8px;
    line-height: 1.25;
    text-align: center;
  }

  .renderer-comparison__label--old {
    left: 8px;
  }

  .renderer-comparison__label--new {
    right: 8px;
  }

  .renderer-comparison__fallback {
    top: max(98px, calc(env(safe-area-inset-top) + 90px));
    right: 8px;
    max-width: calc(50% - 16px);
    font-size: 8px;
  }

  .lab-brand__series,
  .telemetry,
  .icon-button,
  .sim-footer__keys {
    display: none;
  }

  .panel-toggle {
    min-height: 42px;
  }

  .intro-card {
    top: 48%;
    right: 22px;
    left: 22px;
    width: auto;
    transform: translateY(-50%);
  }

  .intro-card h1 {
    font-size: clamp(51px, 15vw, 78px);
    line-height: .82;
  }

  .intro-card__lead {
    margin-top: 24px;
    font-size: 16px;
  }

  .intro-card__actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }

  .detonate--hero {
    width: 100%;
  }

  .control-panel {
    top: auto;
    right: 8px;
    bottom: max(8px, env(safe-area-inset-bottom));
    left: 8px;
    width: auto;
    max-height: min(81svh, 720px);
    border-radius: 18px;
    transform-origin: bottom;
  }

  .control-panel.is-closed {
    transform: translateY(calc(100% + 18px));
  }

  .panel-head {
    min-height: 60px;
  }

  .control-group {
    padding: 17px;
  }

  .sim-footer {
    right: 12px;
    bottom: max(10px, env(safe-area-inset-bottom));
    left: 12px;
  }

  .sim-footer p {
    max-width: 510px;
    font-size: 11px;
  }

  .learn__masthead,
  .learn-section {
    width: min(100% - 36px, 1180px);
  }

  .learn-section--grid,
  .learn-section--warning,
  .related {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .mode-cards,
  .concept-grid {
    grid-template-columns: 1fr;
  }

  .mode-cards article {
    min-height: 250px;
  }

  .learn-section--dark {
    width: 100%;
    padding-inline: 18px;
  }

  .lab-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 46px 18px;
  }

  .export-dialog {
    width: calc(100vw - 16px);
    max-height: calc(100svh - 16px);
  }
}

@media (max-width: 460px) {
  .lab-brand {
    font-size: 9px;
  }

  .intro-card__disclaimer {
    font-size: 11px;
  }

  .field-pair,
  .diagnostic-grid,
  .export-grid {
    grid-template-columns: 1fr;
  }

  .export-grid__wide {
    grid-column: auto;
  }

  .toggle-grid {
    gap: 6px;
  }

  .toggle-grid span {
    padding-right: 6px;
    padding-left: 25px;
    font-size: 7px;
  }

  .toggle-grid span::before {
    left: 8px;
  }

  .learn__masthead h2,
  .learn-section h2 {
    font-size: clamp(39px, 12vw, 58px);
  }

  .learn__masthead > p:last-child {
    margin-top: 27px;
    font-size: 17px;
  }

  .mode-cards h3 {
    margin-top: 52px;
  }
}

@media (pointer: coarse) {
  .topbar-link,
  .icon-button,
  .panel-toggle,
  .panel-close,
  .transport button,
  .seed-row button,
  .export-buttons button,
  .field select,
  .field input[type="number"] {
    min-height: 44px;
  }

  input[type="range"] {
    height: 32px;
  }

  input[type="range"]::-webkit-slider-thumb {
    width: 22px;
    height: 22px;
    margin-top: -9px;
  }

  input[type="range"]::-moz-range-thumb {
    width: 17px;
    height: 17px;
  }
}

@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;
  }

  .grain {
    opacity: .08;
  }
}

@media print {
  .sim-shell,
  .export-dialog {
    display: none;
  }

  .learn,
  .learn-section--dark {
    color: #000;
    background: #fff;
  }
}