:root {
  color-scheme: dark;
  --ink-0: oklch(15% 0.025 205);
  --ink-1: oklch(19% 0.028 205);
  --ink-2: oklch(25% 0.03 205);
  --paper: oklch(91% 0.025 155);
  --muted: oklch(73% 0.025 190);
  --faint: oklch(55% 0.025 200);
  --teal: oklch(78% 0.12 175);
  --teal-dark: oklch(48% 0.08 180);
  --amber: oklch(79% 0.13 75);
  --rust: oklch(69% 0.15 30);
  --violet: oklch(70% 0.12 300);
  --line: oklch(35% 0.03 200);
  --serif: Georgia, "Times New Roman", serif;
  --sans: "Avenir Next", "Segoe UI", Helvetica, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}
* {
  box-sizing: border-box;
}
html {
  background: var(--ink-0);
}
body {
  margin: 0;
  min-width: 320px;
  background: var(--ink-0);
  color: var(--paper);
  font: 15px/1.5 var(--sans);
}
button,
input {
  font: inherit;
}
button {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}
.app-shell {
  height: calc(100dvh - 32px);
  min-height: 680px;
  display: grid;
  grid-template-rows: 68px minmax(390px, 1fr) auto;
}
.topbar {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 clamp(18px, 3vw, 44px);
  border-bottom: 1px solid var(--line);
  background: var(--ink-0);
  position: relative;
  z-index: 6;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
  font: 700 12px var(--mono);
  letter-spacing: 0.12em;
}
.brand svg {
  width: 29px;
  height: 29px;
  fill: none;
  stroke: var(--teal);
  stroke-width: 1.2;
}
.brand b {
  color: var(--faint);
  font-weight: 400;
}
.world-status {
  margin-left: auto;
  color: var(--teal);
  font: 10px var(--mono);
  letter-spacing: 0.1em;
}
.edition {
  color: var(--faint);
  font: 9px var(--mono);
  letter-spacing: 0.1em;
}
.world {
  min-height: 0;
  position: relative;
  overflow: hidden;
  background: radial-gradient(
    circle at 58% 43%,
    oklch(26% 0.045 205),
    var(--ink-0) 72%
  );
}
#world-container {
  position: absolute;
  inset: 0;
}
#world-container canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
  touch-action: none;
}
#world-container canvas:active {
  cursor: grabbing;
}
.world-heading {
  position: absolute;
  z-index: 3;
  left: clamp(20px, 3vw, 44px);
  top: 28px;
  width: 320px;
  pointer-events: none;
}
.world-heading > span {
  color: var(--teal);
  font: 9px var(--mono);
  letter-spacing: 0.16em;
}
.world-heading h1 {
  margin: 14px 0 12px;
  font: 400 clamp(30px, 3.1vw, 48px) / 1.03 var(--serif);
  letter-spacing: -0.025em;
}
.world-heading h1 em {
  color: var(--teal);
  font-weight: 400;
}
.world-heading p {
  margin: 0;
  max-width: 270px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}
.camera-views {
  position: absolute;
  z-index: 4;
  top: 24px;
  right: clamp(18px, 3vw, 44px);
  display: flex;
  border: 1px solid var(--line);
  background: #021215cc;
  backdrop-filter: blur(12px);
}
.camera-views button {
  min-height: 40px;
  padding: 8px 13px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: 9px var(--mono);
  text-transform: uppercase;
}
.camera-views button:last-child {
  border-right: 0;
}
.camera-views button.active {
  color: var(--ink-0);
  background: var(--teal);
}
#scene-labels {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  overflow: hidden;
}
.scene-label {
  position: absolute;
  left: 0;
  top: 0;
  min-width: 118px;
  padding: 7px 9px;
  border-left: 1px solid var(--teal-dark);
  background: linear-gradient(90deg, oklch(15% 0.025 205 / 0.85), transparent);
  text-shadow: 0 1px 5px var(--ink-0);
}
.scene-label[hidden] {
  display: none;
}
.scene-label span {
  display: block;
  color: var(--teal);
  font: 8px var(--mono);
  letter-spacing: 0.12em;
}
.scene-label b {
  display: block;
  margin-top: 3px;
  color: var(--paper);
  font: 9px var(--mono);
  letter-spacing: 0.06em;
}
.scene-label.kernel {
  border-color: var(--amber);
}
.scene-label.kernel span {
  color: var(--amber);
}
.scene-label.substrate {
  border-color: var(--violet);
}
.scene-label.substrate span {
  color: var(--violet);
}
.vertical-key {
  position: absolute;
  z-index: 3;
  left: clamp(20px, 3vw, 44px);
  bottom: 24px;
  display: flex;
  gap: 18px;
  pointer-events: none;
  color: var(--muted);
  font: 8px var(--mono);
  text-transform: uppercase;
}
.vertical-key span {
  display: flex;
  align-items: center;
  gap: 6px;
}
.vertical-key i {
  width: 14px;
  height: 2px;
  background: var(--rust);
}
.vertical-key span:nth-child(2) i {
  background: var(--teal);
}
.vertical-key span:nth-child(3) i {
  background: var(--violet);
}
.phase-readout {
  position: absolute;
  z-index: 3;
  right: clamp(18px, 3vw, 44px);
  bottom: 22px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  pointer-events: none;
  text-align: right;
}
.phase-readout > span:first-child {
  color: var(--amber);
  font: 8px var(--mono);
  letter-spacing: 0.14em;
}
.phase-readout strong {
  margin-top: 5px;
  color: var(--paper);
  font: 400 19px var(--serif);
}
.phase-readout > span:last-child {
  margin-top: 4px;
  max-width: 420px;
  color: var(--faint);
  font: 9px var(--mono);
}
.orbit-help {
  position: absolute;
  z-index: 3;
  left: 50%;
  bottom: 24px;
  transform: translate(-50%);
  color: var(--faint);
  font: 8px var(--mono);
  letter-spacing: 0.06em;
  pointer-events: none;
  white-space: nowrap;
}
.control-deck {
  position: relative;
  z-index: 5;
  border-top: 1px solid var(--line);
  background: var(--ink-1);
  padding: 12px clamp(18px, 3vw, 44px) 11px;
}
.deck-row {
  display: flex;
  align-items: end;
  gap: 24px;
}
.primary-controls {
  align-items: center;
}
.control-set {
  display: flex;
  align-items: center;
  gap: 10px;
}
.control-label {
  color: var(--faint);
  font: 8px var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
}
.segmented {
  display: flex;
  gap: 3px;
}
.segmented button {
  min-height: 38px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: 9px var(--mono);
  text-transform: uppercase;
  white-space: nowrap;
}
.segmented button:hover {
  color: var(--paper);
  background: var(--ink-2);
}
.segmented button.active {
  border-color: var(--teal);
  color: var(--ink-0);
  background: var(--teal);
}
.transport {
  margin-left: auto;
  display: flex;
  gap: 7px;
}
.play-button,
.reset-button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--teal-dark);
  background: #52d0b312;
  color: var(--teal);
  cursor: pointer;
  font: 10px var(--mono);
  text-transform: uppercase;
}
.play-button svg,
.reset-button svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}
.reset-button {
  border-color: var(--line);
  color: var(--muted);
  background: transparent;
}
.reset-button svg {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.4;
}
.play-button .pause-icon,
.play-button[aria-pressed="true"] .play-icon {
  display: none;
}
.play-button[aria-pressed="true"] .pause-icon {
  display: block;
}
.timeline-row {
  display: grid;
  grid-template-columns: 110px 1fr 92px;
  gap: 14px;
  align-items: center;
  margin: 10px 0 7px;
}
.timeline-row > span {
  color: var(--faint);
  font: 8px var(--mono);
  letter-spacing: 0.1em;
}
.timeline-row output {
  color: var(--amber);
  font: 9px var(--mono);
  text-align: right;
}
input[type="range"] {
  width: 100%;
  height: 24px;
  margin: 0;
  accent-color: var(--teal);
  cursor: pointer;
}
.parameter-row {
  display: grid;
  grid-template-columns: minmax(170px, 0.7fr) minmax(170px, 0.7fr) 1fr auto;
  align-items: center;
  gap: 24px;
}
.parameter-row label {
  color: var(--faint);
  font: 8px var(--mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.parameter-row label output {
  color: var(--amber);
  margin-left: 5px;
}
.model-equation {
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.model-equation span {
  color: var(--faint);
  font: 8px var(--mono);
  letter-spacing: 0.1em;
}
.model-equation code {
  color: var(--amber);
  font: 11px var(--mono);
}
.tower-toggle {
  min-height: 38px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: 9px var(--mono);
  text-transform: uppercase;
  white-space: nowrap;
}
.tower-toggle span {
  width: 7px;
  height: 7px;
  border: 1px solid currentColor;
  border-radius: 50%;
}
.tower-toggle.active {
  color: var(--teal);
  border-color: var(--teal-dark);
}
.tower-toggle.active span {
  background: var(--teal);
  box-shadow: 0 0 10px var(--teal);
}
footer {
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 clamp(18px, 3vw, 44px);
  border-top: 1px solid var(--line);
  color: var(--faint);
  font: 8px var(--mono);
  letter-spacing: 0.07em;
}
@media (max-width: 1180px) {
  .world-heading {
    width: 250px;
  }
  .world-heading p,
  .control-label {
    display: none;
  }
  .deck-row {
    gap: 14px;
  }
  .segmented button {
    padding: 7px 9px;
  }
  .parameter-row {
    grid-template-columns: 1fr 1fr auto;
  }
  .model-equation,
  .orbit-help {
    display: none;
  }
}
@media (max-width: 760px) {
  .app-shell {
    height: auto;
    min-height: 100dvh;
    display: block;
  }
  .topbar {
    min-height: 64px;
    padding: 12px 18px;
  }
  .edition {
    display: none;
  }
  .world-status {
    font-size: 8px;
    text-align: right;
  }
  .world {
    height: 610px;
  }
  .world-heading {
    left: 18px;
    top: 20px;
    width: 220px;
  }
  .world-heading h1 {
    font-size: 32px;
  }
  .world-heading > span {
    font-size: 8px;
  }
  .camera-views {
    top: 18px;
    right: 14px;
    flex-direction: column;
  }
  .camera-views button {
    min-height: 34px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .camera-views button:last-child {
    border-bottom: 0;
  }
  .vertical-key {
    left: 18px;
    bottom: 18px;
    flex-direction: column;
    gap: 4px;
  }
  .phase-readout {
    right: 18px;
    bottom: 18px;
    max-width: 220px;
  }
  .phase-readout > span:last-child {
    display: none;
  }
  .phase-readout strong {
    font-size: 16px;
  }
  .scene-label {
    min-width: 90px;
    padding: 5px 6px;
  }
  .scene-label span,
  .scene-label b {
    font-size: 7px;
  }
  .scene-label span:last-child {
    display: none;
  }
  .control-deck {
    padding: 16px 18px;
  }
  .primary-controls {
    flex-wrap: wrap;
    align-items: center;
  }
  .control-set {
    flex: 1 1 auto;
  }
  .segmented {
    width: 100%;
  }
  .segmented button {
    flex: 1;
  }
  .geometry-set {
    flex-basis: 100%;
    order: 3;
  }
  .transport {
    margin-left: 0;
  }
  .timeline-row {
    grid-template-columns: 1fr 80px;
    margin: 14px 0 10px;
  }
  .timeline-row > span {
    display: none;
  }
  .parameter-row {
    grid-template-columns: 1fr;
    gap: 9px;
  }
  .tower-toggle {
    margin-top: 5px;
    justify-content: center;
  }
  footer {
    height: auto;
    min-height: 44px;
    padding: 12px 18px;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *:before,
  *:after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}