@import "./tokens.css";
@font-face {
  font-family: "General Sans";
  src: url("/fonts/GeneralSans-Variable.woff2") format("woff2");
  font-weight: 200 700;
  font-display: swap;
}
@font-face {
  font-family: "Commit Mono";
  src: url("/fonts/CommitMono-400.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}
* {
  box-sizing: border-box;
}
:root {
  color-scheme: dark;
  font-family: var(--font-sans);
  color: var(--color-ink-hi);
  background: var(--color-void);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}
body {
  margin: 0;
}
[hidden] {
  display: none !important;
}
button,
input,
output {
  font: inherit;
}
button,
a,
input {
  -webkit-tap-highlight-color: transparent;
}
button {
  color: inherit;
  cursor: pointer;
}
button:disabled {
  opacity: 0.35;
  cursor: default;
}
a {
  color: inherit;
  text-decoration: none;
}
p,
h1,
h2,
h3 {
  margin: 0;
}
:focus-visible {
  outline: 2px solid var(--color-terracotta-500);
  outline-offset: 4px;
}
::selection {
  background: var(--color-ember-soft);
}
.icon-defs {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}
.icon {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: 0 0 auto;
}
.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;
}
.skip-link {
  position: fixed;
  z-index: 10;
  left: 20px;
  top: -100px;
  padding: 12px;
  background: var(--color-terracotta-500);
  color: var(--color-void);
}
.skip-link:focus {
  top: 10px;
}
.site-header {
  border-bottom: 1px solid var(--color-line);
}
.header-inner {
  max-width: 1440px;
  height: 68px;
  padding: 0 44px;
  margin: auto;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.5px;
}
.brand svg {
  width: 28px;
  height: 28px;
  fill: none;
  stroke: var(--color-terracotta-500);
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.header-divider {
  height: 18px;
  width: 1px;
  background: var(--color-line-hover);
}
.header-location {
  color: var(--color-ink-mid);
  font-size: 13px;
}
.header-location span {
  margin: 0 12px;
  color: var(--color-ink-low);
}
.back-link {
  margin-left: auto;
  color: var(--color-ink-mid);
  font-size: 13px;
}
.back-link span {
  margin-left: 8px;
}
.back-link:hover {
  color: var(--color-ink-hi);
}
.shell {
  max-width: 1440px;
  margin: auto;
  padding: 0 44px;
}
.intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 34px 0 30px;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  text-transform: uppercase;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-ink-mid);
}
.ember-line {
  width: 16px;
  height: 2px;
  background: var(--color-terracotta-500);
}
h1 {
  font-size: clamp(28px, 3vw, 42px);
  letter-spacing: -0.04em;
  line-height: 1.08;
  font-weight: 500;
}
h1 span {
  color: var(--color-ink-mid);
}
.intro-copy {
  margin-top: 12px;
  color: var(--color-ink-mid);
  font-size: 13px;
  line-height: 1.6;
}
.intro-note {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 0 12px 0 24px;
  border-left: 1px solid var(--color-line);
  font-size: 13px;
  white-space: nowrap;
}
.intro-note > .icon {
  color: var(--color-terracotta-400);
  width: 22px;
  height: 22px;
}
.intro-note small {
  display: block;
  color: var(--color-ink-low);
  margin-top: 6px;
  font-size: 11px;
}
.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 292px;
  align-items: start;
  gap: 24px;
}
.stage-column {
  min-width: 0;
}
.stage-frame {
  border: 1px solid var(--color-line-hover);
  border-radius: var(--radius-card);
  background: var(--color-inset);
  overflow: hidden;
}
.stage-toolbar {
  height: 56px;
  background: var(--color-panel);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--color-line);
  gap: 12px;
}
.stage-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}
.stage-heading h2 {
  font-size: 13px;
  font-weight: 500;
}
.branch-swatch {
  width: 7px;
  height: 7px;
  background: var(--color-terracotta-500);
  border-radius: 2px;
}
.state-badge {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-ink-mid);
  border: 1px solid var(--color-line);
  border-radius: 4px;
  padding: 3px 5px;
  white-space: nowrap;
}
.state-badge[data-mode="history"] {
  color: var(--color-terracotta-300);
  border-color: var(--color-ember-soft);
}
.state-badge[data-mode="live"] {
  color: var(--color-ok);
}
.compare-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--color-ink-mid);
  background: transparent;
  border: 0;
  padding: 8px 0;
}
.toggle-track {
  width: 23px;
  height: 13px;
  background: var(--color-raised);
  border-radius: 12px;
  border: 1px solid var(--color-line-hover);
  position: relative;
}
.toggle-track::after {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-ink-low);
  position: absolute;
  left: 2px;
  top: 2px;
  transition:
    transform var(--dur-1),
    background var(--dur-1);
}
.compare-toggle[aria-pressed="true"] .toggle-track {
  background: var(--color-ember-soft);
  border-color: var(--color-terracotta-600);
}
.compare-toggle[aria-pressed="true"] .toggle-track::after {
  background: var(--color-terracotta-400);
  transform: translateX(10px);
}
.canvas-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 38px;
  height: clamp(310px, 44vh, 470px);
  background:
    radial-gradient(
      ellipse at center,
      var(--color-ember-wash),
      transparent 70%
    ),
    var(--color-inset);
}
#focus {
  display: block;
  max-width: 100%;
  height: 100%;
  width: auto;
  aspect-ratio: 4/3;
  cursor: crosshair;
  touch-action: manipulation;
}
.stage-coordinate {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--color-ink-low);
  opacity: 0.65;
  letter-spacing: 0.04em;
  pointer-events: none;
}
.top-left {
  top: 16px;
  left: 16px;
}
.bottom-right {
  bottom: 14px;
  right: 16px;
}
.canvas-caption {
  min-height: 36px;
  padding: 0 20px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.canvas-caption p {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--color-ink-mid);
  font-size: 11px;
}
.canvas-caption .icon {
  width: 13px;
  height: 13px;
  color: var(--color-terracotta-400);
}
.cell-coordinate {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-ink-low);
  white-space: nowrap;
}
.timeline {
  padding: 15px 20px 13px;
  border-top: 1px solid var(--color-line);
  background: var(--color-panel);
}
.timeline-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
}
.timeline-kind {
  color: var(--color-ink-low);
}
#checkpoint {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-ink-mid);
}
.timeline-track {
  position: relative;
  margin: 5px 0 1px;
  height: 24px;
}
input[type="range"] {
  appearance: none;
  display: block;
  width: 100%;
  height: 22px;
  background: transparent;
  cursor: pointer;
  margin: 0;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 3px;
  border-radius: 2px;
  background: var(--color-line-hover);
}
input[type="range"]::-moz-range-track {
  height: 3px;
  border-radius: 2px;
  background: var(--color-line-hover);
}
input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 9px;
  height: 9px;
  background: var(--color-terracotta-400);
  border: 0;
  border-radius: 50%;
  margin-top: -3px;
}
input[type="range"]::-moz-range-thumb {
  width: 9px;
  height: 9px;
  background: var(--color-terracotta-400);
  border: 0;
  border-radius: 50%;
}
input:disabled {
  cursor: default;
  opacity: 0.5;
}
#history {
  position: relative;
  z-index: 1;
}
#history-markers {
  position: absolute;
  top: 9px;
  left: 5px;
  right: 5px;
  height: 5px;
  pointer-events: none;
}
.checkpoint-marker {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--color-terracotta-400);
  transform: translateX(-50%) rotate(45deg);
}
.checkpoint-marker.fork {
  background: var(--color-ink-mid);
}
.timeline-scale {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--color-ink-low);
  letter-spacing: 0.04em;
}
#history-note {
  font-family: var(--font-sans);
  font-size: 10px;
  letter-spacing: 0;
}
.text-button {
  padding: 0;
  background: none;
  border: 0;
  font-size: 10px;
  color: var(--color-terracotta-300);
}
.text-button:hover {
  color: var(--color-ink-hi);
}
.shelf-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 22px 0 12px;
}
.shelf-heading h2 {
  font-size: 12px;
  font-weight: 500;
}
.shelf-heading h2 span {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--color-ink-low);
  margin-left: 7px;
}
.shelf-heading p {
  font-size: 10px;
  color: var(--color-ink-low);
}
.colony-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
}
.colony-card {
  min-width: 0;
  padding: 0;
  border: 1px solid var(--color-line-hover);
  border-radius: var(--radius-control);
  background: var(--color-inset);
  overflow: hidden;
  text-align: left;
  transition:
    border-color var(--dur-1),
    background var(--dur-1);
  position: relative;
}
.colony-card:hover {
  border-color: var(--color-ink-low);
}
.colony-card[aria-pressed="true"] {
  border-color: var(--color-terracotta-500);
  background: var(--color-ember-wash);
}
.colony-card[aria-pressed="true"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  top: 0;
  background: var(--color-terracotta-500);
}
.colony-card canvas {
  width: 100%;
  height: 84px;
  object-fit: contain;
  display: block;
  padding: 9px 12px 5px;
  opacity: 0.7;
}
.colony-card[aria-pressed="true"] canvas {
  opacity: 1;
}
.colony-caption {
  padding: 7px 9px 8px;
  border-top: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 3px;
  font-size: 9px;
  white-space: nowrap;
}
.colony-caption strong {
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
}
.colony-caption small {
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--color-ink-low);
}
.colony-card[aria-pressed="true"] .colony-caption strong {
  color: var(--color-terracotta-300);
}
.control-panel {
  border: 1px solid var(--color-line-hover);
  border-radius: var(--radius-card);
  background: var(--color-panel);
  position: sticky;
  top: 20px;
  overflow: hidden;
}
.control-section {
  padding: 22px;
  border-bottom: 1px solid var(--color-line);
}
.section-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 9px;
  color: var(--color-ink-mid);
  font-weight: 500;
}
.running-indicator {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0;
  text-transform: none;
}
.running-indicator i,
.session-dot {
  width: 4px;
  height: 4px;
  background: var(--color-ink-low);
  border-radius: 50%;
}
.running-indicator[data-running="true"] i {
  background: var(--color-ok);
}
.running-indicator[data-running="true"] {
  color: var(--color-ok);
}
.generation-display {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 13px 0 17px;
}
.generation-display > span:first-child {
  font-family: var(--font-mono);
  font-size: 44px;
  letter-spacing: -0.075em;
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
}
.generation-display > span:last-child {
  color: var(--color-ink-low);
  font-size: 10px;
}
.transport-buttons {
  display: flex;
  gap: 8px;
}
.button {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  font-size: 12px;
  font-weight: 500;
  transition:
    background var(--dur-1),
    border-color var(--dur-1);
}
.primary {
  color: var(--color-void);
  background: var(--color-terracotta-500);
}
.primary:hover:enabled {
  background: var(--color-terracotta-400);
}
.primary .icon {
  width: 15px;
  height: 15px;
}
#play,
#pause {
  flex: 1;
}
.step-button,
.secondary {
  background: transparent;
  border-color: var(--color-line-hover);
}
.step-button:hover:enabled,
.secondary:hover:enabled {
  background: var(--color-raised);
  border-color: var(--color-ink-low);
}
.step-button {
  width: 42px;
  padding: 0;
}
.speed-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 21px;
  font-size: 11px;
  color: var(--color-ink-mid);
}
.speed-label output {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--color-ink-hi);
}
.speed-label output span {
  color: var(--color-ink-low);
  font-size: 9px;
}
.range-labels {
  display: flex;
  justify-content: space-between;
  font-size: 9px;
  color: var(--color-ink-low);
}
.muted {
  color: var(--color-ink-low);
  width: 13px;
  height: 13px;
}
.branch-details h3 {
  margin-top: 14px;
  font-size: 19px;
  font-weight: 500;
  letter-spacing: -0.03em;
}
.parent-line {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10px;
  color: var(--color-ink-mid);
  margin-top: 7px;
  line-height: 1.5;
}
.parent-line .icon {
  width: 11px;
  height: 11px;
}
.branch-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin-top: 22px;
}
.branch-stats > div + div {
  border-left: 1px solid var(--color-line);
  padding-left: 20px;
}
.branch-stats > div > span {
  display: block;
  font-family: var(--font-mono);
  font-size: 25px;
  letter-spacing: -0.055em;
}
.branch-stats small {
  display: block;
  color: var(--color-ink-low);
  font-size: 9px;
  margin-top: 5px;
  line-height: 1.5;
}
#difference {
  color: var(--color-terracotta-300);
}
.legend {
  display: flex;
  gap: 14px;
  margin-top: 21px;
  color: var(--color-ink-mid);
  font-size: 9px;
}
.legend span {
  display: flex;
  align-items: center;
  gap: 5px;
}
.legend i {
  width: 5px;
  height: 5px;
  display: block;
}
.legend-live {
  background: var(--cell-shared);
}
.legend-added {
  background: var(--cell-added);
}
.legend-missing {
  border: 1px solid var(--cell-missing);
}
.fork-section {
  background: linear-gradient(145deg, var(--color-ember-wash), transparent 70%);
}
.fork-heading {
  display: flex;
  align-items: center;
  gap: 7px;
}
.fork-heading .icon {
  color: var(--color-terracotta-400);
  width: 15px;
  height: 15px;
}
.fork-heading h3 {
  font-weight: 500;
  font-size: 13px;
  letter-spacing: -0.01em;
}
.fork-section > p:not(.fork-context) {
  font-size: 11px;
  line-height: 1.7;
  color: var(--color-ink-mid);
  margin: 10px 0 16px;
}
#fork {
  width: 100%;
  justify-content: space-between;
  border-color: var(--color-line-hover);
}
#fork:hover:enabled {
  border-color: var(--color-terracotta-500);
}
.fork-context {
  font-size: 9px;
  color: var(--color-ink-low);
  text-align: center;
  margin-top: 10px;
}
.reset-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  width: 100%;
  min-height: 50px;
  border: none;
  background: transparent;
  font-size: 10px;
  color: var(--color-ink-mid);
}
.reset-button .icon {
  width: 12px;
  height: 12px;
}
.reset-button:hover:enabled {
  color: var(--color-ink-hi);
  background: var(--color-raised);
}
.experiment-footer {
  border-top: 1px solid var(--color-line);
  margin-top: 25px;
  padding: 17px 0 28px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: var(--color-ink-low);
  font-size: 10px;
  line-height: 1.6;
}
.experiment-footer > p {
  display: flex;
  align-items: center;
  gap: 7px;
  align-self: flex-start;
}
.engine-note {
  max-width: 330px;
  text-align: right;
}
.engine-note summary {
  cursor: pointer;
  list-style: none;
}
.engine-note summary::-webkit-details-marker {
  display: none;
}
.engine-note summary span {
  margin-left: 6px;
}
.engine-note p {
  margin-top: 12px;
  text-align: left;
}
.engine-note a {
  color: var(--color-terracotta-300);
  display: block;
  margin-top: 8px;
}
.loading {
  position: absolute;
  inset: 0;
  background: var(--color-inset);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}
.loading small {
  font-size: 11px;
  color: var(--color-ink-mid);
}
.loading-cells {
  display: grid;
  grid-template-columns: repeat(3, 6px);
  grid-template-rows: repeat(3, 6px);
  gap: 3px;
  margin-bottom: 8px;
  transform: rotate(-12deg);
}
.loading-cells i {
  background: var(--color-terracotta-500);
  animation: breathe 1.6s ease-in-out infinite alternate;
}
.loading-cells i:nth-child(1) {
  grid-column: 2;
}
.loading-cells i:nth-child(2) {
  grid-row: 2;
  grid-column: 3;
}
.loading-cells i:nth-child(n + 3) {
  grid-row: 3;
}
@keyframes breathe {
  to {
    opacity: 0.25;
  }
}
.error-banner {
  border: 1px solid var(--color-err);
  border-radius: var(--radius-control);
  padding: 12px 16px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
}
.error-banner p {
  flex: 1;
  line-height: 1.6;
}
.icon-button {
  background: none;
  border: 0;
  padding: 4px;
  color: var(--color-ink-mid);
}
dialog {
  max-width: min(440px, calc(100vw - 32px));
  background: var(--color-panel);
  border: 1px solid var(--color-line-hover);
  border-radius: var(--radius-frame);
  padding: 28px;
  color: var(--color-ink-hi);
}
dialog::backdrop {
  background: color-mix(in srgb, var(--color-void) 75%, transparent);
  backdrop-filter: blur(4px);
}
.dialog-icon {
  color: var(--color-terracotta-400);
  margin-bottom: 16px;
}
dialog h2 {
  font-weight: 500;
  font-size: 24px;
  letter-spacing: -0.03em;
}
dialog p {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-ink-mid);
}
.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 24px;
}
@media (min-width: 1600px) {
  .canvas-stage {
    height: 490px;
  }
}
@media (max-width: 1100px) {
  .header-inner,
  .shell {
    padding-left: 28px;
    padding-right: 28px;
  }
  .workspace {
    grid-template-columns: minmax(0, 1fr) 264px;
    gap: 18px;
  }
  .control-section {
    padding: 20px;
  }
  .intro-note {
    display: none;
  }
  .canvas-stage {
    padding: 20px;
    height: 350px;
  }
  .colony-grid {
    gap: 7px;
  }
  .colony-card canvas {
    padding: 6px;
    height: 70px;
  }
  .colony-caption {
    padding: 7px 5px;
  }
  .colony-caption small {
    display: none;
  }
}
@media (max-width: 800px) {
  .header-inner,
  .shell {
    padding-left: 20px;
    padding-right: 20px;
  }
  .header-inner {
    height: 60px;
    gap: 15px;
  }
  .header-location {
    font-size: 11px;
  }
  .header-location span {
    margin: 0 6px;
  }
  .intro {
    padding: 26px 0;
  }
  .workspace {
    grid-template-columns: minmax(0, 1fr);
  }
  .control-panel {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .branch-details {
    border-left: 1px solid var(--color-line);
  }
  .fork-section {
    border-bottom: 0;
  }
  .reset-button {
    align-self: center;
  }
  .canvas-stage {
    height: 400px;
  }
  .colony-card canvas {
    height: 80px;
  }
  .colony-caption small {
    display: block;
  }
  .colony-caption {
    padding: 8px;
  }
  .experiment-footer {
    flex-wrap: wrap;
    gap: 12px;
  }
  .engine-note {
    text-align: left;
  }
}
@media (max-width: 520px) {
  .header-location,
  .header-divider {
    display: none;
  }
  .brand {
    font-size: 17px;
  }
  .header-inner {
    padding: 0 18px;
  }
  .shell {
    padding: 0 16px;
  }
  h1 {
    max-width: 310px;
    font-size: 34px;
    line-height: 1.1;
  }
  h1 span {
    display: block;
  }
  .intro-copy {
    font-size: 12px;
    max-width: 315px;
  }
  .eyebrow {
    font-size: 9px;
  }
  .stage-toolbar {
    padding: 0 12px;
    height: 51px;
    gap: 8px;
  }
  .stage-heading {
    gap: 7px;
  }
  .stage-heading h2 {
    font-size: 12px;
  }
  .state-badge {
    font-size: 8px;
  }
  .compare-toggle {
    font-size: 9px;
    gap: 6px;
  }
  .canvas-stage {
    padding: 22px 12px 16px;
    height: auto;
    aspect-ratio: 4/3;
  }
  #focus {
    width: 100%;
    height: auto;
  }
  .stage-coordinate {
    font-size: 6px;
  }
  .top-left {
    top: 9px;
    left: 12px;
  }
  .bottom-right {
    bottom: 5px;
    right: 12px;
  }
  .canvas-caption {
    padding: 9px 12px 12px;
  }
  .canvas-caption p {
    font-size: 10px;
  }
  .cell-coordinate {
    display: none;
  }
  .timeline {
    padding: 12px;
  }
  .timeline-heading {
    flex-wrap: wrap;
    font-size: 10px;
  }
  #checkpoint {
    font-size: 8px;
  }
  .colony-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }
  .colony-card canvas {
    height: 71px;
  }
  .shelf-heading {
    margin-top: 19px;
  }
  .control-panel {
    display: block;
  }
  .branch-details {
    border-left: 0;
  }
  .control-section {
    padding: 20px;
  }
  .generation-display {
    margin: 12px 0;
  }
  .generation-display > span:first-child {
    font-size: 38px;
  }
  .branch-stats {
    margin-top: 16px;
  }
  .legend {
    margin-top: 18px;
  }
  .fork-section {
    border-bottom: 1px solid var(--color-line);
  }
  .experiment-footer {
    margin-bottom: 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* Compact metadata stays readable without competing with the board. */
.section-label {
  font-size: 10px;
}
.colony-caption {
  font-size: 10px;
}
.branch-stats small,
.legend,
.fork-context,
.range-labels {
  font-size: 10px;
}
.parent-line,
.reset-button,
.experiment-footer {
  font-size: 11px;
}
.fork-section > p:not(.fork-context),
.canvas-caption p {
  font-size: 12px;
}
.button {
  min-height: 44px;
  font-size: 13px;
}

@media (max-width: 800px) {
  .workspace {
    gap: 16px;
  }
  .control-panel {
    display: contents;
  }
  .transport {
    grid-row: 1;
    position: sticky;
    top: 0;
    z-index: 4;
    display: grid;
    grid-template-columns: 1fr minmax(180px, 1fr);
    gap: 6px 18px;
    align-items: center;
    padding: 12px 16px;
    background: var(--color-panel);
    border: 1px solid var(--color-line-hover);
    border-radius: var(--radius-card);
    box-shadow: 0 8px 20px var(--color-void);
  }
  .transport .section-label,
  .transport .range-labels {
    display: none;
  }
  .generation-display {
    margin: 0;
    gap: 8px;
  }
  .generation-display > span:first-child {
    font-size: 29px;
  }
  .generation-display > span:last-child {
    font-size: 9px;
  }
  .transport-buttons {
    grid-column: 2;
    grid-row: 1;
  }
  .transport-buttons .primary {
    padding: 10px 8px;
    font-size: 12px;
    gap: 6px;
    white-space: nowrap;
  }
  .speed-label {
    margin: 0;
    font-size: 10px;
  }
  .speed-label output {
    font-size: 10px;
  }
  #speed {
    height: 30px;
  }
  .stage-column {
    grid-row: 2;
  }
  .branch-details,
  .fork-section {
    background: var(--color-panel);
    border: 1px solid var(--color-line-hover);
    border-radius: var(--radius-card);
  }
  .fork-section {
    grid-row: 3;
  }
  .reset-button {
    border: 1px solid var(--color-line-hover);
    border-radius: var(--radius-control);
  }
  .canvas-caption p {
    font-size: 11px;
  }
}
@media (max-width: 380px) {
  .transport {
    grid-template-columns: 1fr 170px;
    padding: 10px 12px;
    gap: 4px 12px;
  }
  .generation-display > span:last-child {
    display: none;
  }
  .button {
    font-size: 12px;
  }
}

/* Draft editing shares the sidebar on desktop and follows the grid on mobile. */
#focus {
  touch-action: none;
}
.state-badge[data-mode="editing"] {
  color: var(--color-terracotta-500);
  border-color: var(--color-terracotta-500);
}
.edit-section {
  border-top: 1px solid var(--color-line);
}
#draft-context,
.tool-hint {
  color: var(--color-ink-mid);
  font-size: 12px;
  line-height: 1.6;
  margin: 12px 0;
}
#draft-badge {
  color: var(--color-terracotta-500);
  font-size: 10px;
}
.edit-tools {
  display: flex;
  gap: 6px;
}
.edit-tools .button {
  flex: 1;
  padding: 8px;
  font-size: 12px;
}
.edit-tools [aria-pressed="true"] {
  border-color: var(--color-terracotta-500);
  color: var(--color-terracotta-500);
  background: var(--color-ember-soft);
}
.edit-secondary {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.edit-secondary .text-button {
  min-height: 44px;
  font-size: 12px;
}
#draft-actions > .button {
  width: 100%;
  margin-top: 8px;
}
#preview-before[aria-pressed="true"] {
  border-color: var(--color-terracotta-500);
}
@media (max-width: 800px) {
  .edit-section {
    grid-row: 3;
    border: 1px solid var(--color-line-hover);
    border-radius: var(--radius-card);
    background: var(--color-panel);
  }
  .fork-section {
    grid-row: 4;
  }
}

/* Branch lineage and generation-aligned comparisons. */
.comparison-controls {
  margin-top: 18px;
}
.comparison-controls > label {
  display: block;
  color: var(--color-ink-mid);
  font-size: 12px;
  margin-bottom: 8px;
}
#compare-target {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--color-line-hover);
  border-radius: var(--radius-control);
  color: var(--color-ink-hi);
  background: var(--color-inset);
  padding: 10px;
  font: inherit;
  font-size: 12px;
  margin-bottom: 10px;
}
.explorer-note {
  color: var(--color-ink-mid);
  font-size: 12px;
  line-height: 1.6;
  margin: 12px 0;
  overflow-wrap: anywhere;
}
#visit-origin {
  font-size: 12px;
  min-height: 44px;
}
.branch-explorer,
.difference-chart {
  margin-top: 24px;
  border: 1px solid var(--color-line-hover);
  border-radius: var(--radius-card);
  padding: 20px;
  background: var(--color-panel);
}
.branch-explorer .shelf-heading,
.difference-chart .shelf-heading {
  margin: 0;
  flex-wrap: wrap;
  gap: 8px;
}
.lineage-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.lineage-list .lineage-list {
  margin-left: 12px;
  padding-left: 10px;
  border-left: 1px solid var(--color-line-hover);
}
.lineage-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 12px;
  padding: 4px 0;
}
.lineage-choice {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 12px;
  min-height: 44px;
  padding: 8px 12px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-ink-hi);
  border-radius: var(--radius-control);
  text-align: left;
}
.lineage-choice strong {
  font-size: 12px;
  font-weight: 500;
}
.lineage-choice span {
  color: var(--color-ink-mid);
  font-family: var(--font-mono);
  font-size: 9px;
}
.lineage-choice[aria-pressed="true"] {
  color: var(--color-terracotta-500);
  background: var(--color-ember-soft);
  border-color: var(--color-terracotta-500);
}
.lineage-origin {
  font-size: 10px;
  min-height: 44px;
  text-align: left;
}
#chart-pair {
  font-size: 11px;
  color: var(--color-ink-mid);
}
#divergence-chart {
  display: block;
  width: 100%;
  max-height: 240px;
}
#divergence-chart text {
  font: 11px var(--font-mono);
  fill: var(--color-ink-mid);
}
.chart-gridline {
  stroke: var(--color-line-hover);
}
.chart-line {
  fill: none;
  stroke: var(--color-terracotta-500);
  stroke-width: 2;
  stroke-linejoin: round;
}
.chart-dot {
  fill: var(--color-terracotta-500);
}
#chart-values {
  font-size: 12px;
  color: var(--color-ink-mid);
}
#chart-values summary {
  cursor: pointer;
  padding: 12px 0;
}
.chart-table {
  max-height: 260px;
  overflow: auto;
}
.chart-table table {
  width: 100%;
  border-collapse: collapse;
}
.chart-table th,
.chart-table td {
  border-bottom: 1px solid var(--color-line);
  padding: 10px 6px;
  text-align: right;
  font-weight: 400;
}
.chart-table caption {
  text-align: left;
  margin-bottom: 8px;
}
.comparison-boards > * {
  min-width: 0;
}
.comparison-boards.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1px;
  background: var(--color-line);
}
.board-label {
  font: 10px var(--font-mono);
  padding: 14px 12px;
  background: var(--color-inset);
  color: var(--color-ink-mid);
  line-height: 1.6;
  min-height: 44px;
}
.reference-board {
  display: flex;
  flex-direction: column;
  background: var(--color-inset);
}
.reference-stage,
.split .canvas-stage {
  height: auto;
  aspect-ratio: 4/3;
  padding: 20px 12px;
  background: var(--color-inset);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.split #focus,
#reference {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  display: block;
}
#reference-unavailable {
  font-size: 12px;
  line-height: 1.6;
  padding: 20px;
  color: var(--color-ink-mid);
}
@media (max-width: 600px) {
  .comparison-boards.split {
    grid-template-columns: minmax(0, 1fr);
  }
  .branch-explorer,
  .difference-chart {
    padding: 14px;
  }
  .lineage-list .lineage-list {
    margin-left: 6px;
    padding-left: 6px;
  }
  .lineage-choice {
    padding: 6px;
  }
  .lineage-origin {
    margin-left: 6px;
  }
}
.stage-frame {
  scroll-margin-top: 24px;
}
@media (max-width: 800px) {
  .stage-frame {
    scroll-margin-top: 120px;
  }
}
@media (max-width: 800px) {
  /* Keep editing and comparison ahead of the growing ancestry and chart. */
  .stage-column {
    display: contents;
  }
  .stage-frame {
    grid-row: 2;
  }
  .edit-section {
    grid-row: 3;
  }
  .branch-details {
    grid-row: 4;
  }
  .colony-shelf {
    grid-row: 5;
  }
  .fork-section {
    grid-row: 6;
  }
  .branch-explorer {
    grid-row: 7;
  }
  .difference-chart {
    grid-row: 8;
  }
  .reset-button {
    grid-row: 9;
  }
}
.help-button {
  margin-left: auto;
  min-height: 44px;
  font-size: 12px;
}
.quickstart {
  border: 1px solid var(--color-line-hover);
  border-radius: var(--radius-card);
  margin: -8px 0 24px;
  padding: 0 20px;
  background: var(--color-panel);
}
.quickstart summary {
  cursor: pointer;
  padding: 14px 0;
  font-size: 13px;
}
.quickstart summary span {
  color: var(--color-ink-mid);
  font-size: 11px;
  margin-left: 16px;
}
.quickstart-body {
  display: flex;
  align-items: center;
  gap: 24px;
  padding-bottom: 16px;
}
.quickstart-body p {
  color: var(--color-ink-mid);
  font-size: 13px;
  line-height: 1.6;
  flex: 1;
}
.quickstart-body .button {
  flex-shrink: 0;
}
#help-dialog {
  max-width: 580px;
  max-height: 85vh;
  overflow: auto;
}
#help-dialog ol {
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-ink-mid);
}
#help-dialog li {
  margin: 12px 0;
}
#help-dialog strong {
  color: var(--color-ink-hi);
}
#help-dialog p {
  margin: 16px 0;
}
#help-dialog .button {
  width: 100%;
}
.no-script {
  padding: 20px;
  border: 1px solid var(--color-terracotta-500);
  margin-bottom: 24px;
}
@media (max-width: 600px) {
  .help-button {
    font-size: 11px;
  }
  .quickstart {
    padding: 0 14px;
  }
  .quickstart summary span {
    display: none;
  }
  .quickstart-body {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }
  .quickstart-body p {
    font-size: 12px;
  }
}
/* Coordinate labels remain legible on both neutral canvas surfaces. */
.stage-coordinate {
  opacity: 1;
  color: var(--color-ink-mid);
}
#mobile-tools {
  display: none;
}
@media (max-width: 800px) {
  #mobile-tools {
    display: block;
    grid-column: 1 / -1;
    min-height: 44px;
    font-size: 11px;
    text-align: center;
  }
  .stage-frame {
    scroll-margin-top: 170px;
  }
  #simulation-limit {
    grid-column: 1 / -1;
  }
}