/* © 2026 FunApp https://funapp.io */
:root {
  color-scheme: dark;
  --void: #050608;
  --chalk: #f3f1ea;
  --fog: #8d939c;
  --shade: #15191e;
  --focus: #7fe8f2;
  --hairline: rgba(243, 241, 234, 0.28);
  --panel: rgba(5, 6, 8, 0.9);
  font-family: "Segoe UI", "Noto Sans TC", sans-serif;
}

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

html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--void);
  color: var(--chalk);
}

body {
  min-width: 280px;
  font-family: "Segoe UI", "Noto Sans TC", sans-serif;
  -webkit-font-smoothing: antialiased;
}

button,
input {
  font: inherit;
}

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

.experience-shell {
  position: relative;
  isolation: isolate;
  width: 100%;
  height: 100dvh;
  min-height: 320px;
  overflow: hidden;
  background: var(--void);
}

#depth-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
  width: 100%;
  height: 100%;
  outline: 0;
  cursor: none;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
}

#depth-canvas:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: -6px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 8px;
  left: 50%;
  min-height: 44px;
  padding: 11px 16px;
  border: 1px solid var(--focus);
  background: var(--void);
  color: var(--chalk);
  transform: translate(-50%, -160%);
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

.back-link {
  position: absolute;
  z-index: 4;
  top: max(12px, env(safe-area-inset-top));
  left: max(12px, env(safe-area-inset-left));
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  align-items: center;
  min-height: 44px;
  border: 1px solid rgba(243, 241, 234, 0.16);
  border-radius: 2px;
  background: rgba(5, 6, 8, 0.42);
  color: rgba(243, 241, 234, 0.58);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 1rem;
  text-decoration: none;
}

.back-link:hover {
  border-color: var(--chalk);
  background: var(--void);
  color: var(--chalk);
}

.back-link:focus-visible,
button:focus-visible,
input[type="range"]:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.telemetry {
  position: absolute;
  z-index: 3;
  top: clamp(24px, 4vw, 50px);
  right: clamp(18px, 4vw, 56px);
  display: grid;
  grid-template-columns: auto auto;
  gap: 4px 14px;
  color: var(--fog);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.67rem;
  letter-spacing: 0.08em;
  line-height: 1.5;
  text-align: right;
  text-transform: uppercase;
  pointer-events: none;
}

.telemetry-label {
  grid-row: 1;
  grid-column: 1;
}

#state-output {
  grid-row: 1;
  grid-column: 2;
  color: var(--focus);
  font-weight: 800;
}

.telemetry-coordinate,
.telemetry-layers {
  grid-column: 1 / -1;
}

.view-reticle {
  --reticle-x: 0px;
  --reticle-y: 0px;
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(127, 232, 242, 0.52);
  transform: translate(calc(-50% + var(--reticle-x)), calc(-50% + var(--reticle-y)));
  transition: border-color 160ms ease;
  pointer-events: none;
}

.view-reticle::before,
.view-reticle::after,
.view-reticle span::before,
.view-reticle span::after {
  position: absolute;
  content: "";
  background: var(--focus);
}

.view-reticle::before {
  top: 16px;
  left: -9px;
  width: 8px;
  height: 1px;
}

.view-reticle::after {
  top: 16px;
  right: -9px;
  width: 8px;
  height: 1px;
}

.view-reticle span::before {
  top: -9px;
  left: 16px;
  width: 1px;
  height: 8px;
}

.view-reticle span::after {
  bottom: -9px;
  left: 16px;
  width: 1px;
  height: 8px;
}

body[data-mode="paused"] .view-reticle {
  border-color: rgba(243, 241, 234, 0.26);
}

.control-deck {
  position: absolute;
  z-index: 4;
  right: max(16px, env(safe-area-inset-right));
  bottom: max(16px, env(safe-area-inset-bottom));
  left: max(16px, env(safe-area-inset-left));
  display: grid;
  grid-template-columns: auto minmax(180px, 1fr) minmax(180px, 1fr);
  gap: 14px 24px;
  align-items: center;
  width: min(940px, calc(100% - 32px));
  margin-inline: auto;
  padding: 13px;
  border: 1px solid var(--hairline);
  background: var(--panel);
}

.button-controls {
  display: flex;
  gap: 8px;
}

button {
  min-width: 106px;
  min-height: 44px;
  border: 1px solid var(--hairline);
  border-radius: 2px;
  background: var(--shade);
  color: var(--chalk);
  font-size: 0.77rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  touch-action: manipulation;
}

button:hover {
  border-color: var(--chalk);
}

button:active {
  background: var(--chalk);
  color: var(--void);
}

button[aria-pressed="true"] {
  border-color: var(--focus);
  color: var(--focus);
}

.button-symbol {
  display: inline-block;
  min-width: 1.25em;
  margin-right: 5px;
  color: var(--focus);
  font-family: "Cascadia Mono", Consolas, monospace;
}

.range-control {
  min-width: 0;
}

.range-heading,
.range-ends {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.range-heading {
  margin-bottom: 2px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.range-heading output {
  color: var(--focus);
  font-family: "Cascadia Mono", Consolas, monospace;
}

input[type="range"] {
  width: 100%;
  min-height: 44px;
  margin: 0;
  accent-color: var(--focus);
  cursor: ew-resize;
  touch-action: manipulation;
}

.range-ends {
  margin-top: -8px;
  color: var(--fog);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.56rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.keyboard-hint {
  grid-column: 1 / -1;
  margin: -5px 0 0;
  color: var(--fog);
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 0.61rem;
  letter-spacing: 0.07em;
  text-align: center;
  text-transform: uppercase;
}

.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;
}

.noscript {
  position: fixed;
  z-index: 30;
  inset: 50% auto auto 50%;
  width: min(90vw, 520px);
  padding: 20px;
  border: 1px solid var(--chalk);
  background: var(--void);
  color: var(--chalk);
  transform: translate(-50%, -50%);
  text-align: center;
}

@media (max-width: 620px) {
  .telemetry {
    top: auto;
    right: 17px;
    bottom: 205px;
    font-size: 0.58rem;
  }

  .control-deck {
    right: 8px;
    bottom: max(8px, env(safe-area-inset-bottom));
    left: 8px;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 8px 12px;
    width: calc(100% - 16px);
    padding: 10px;
  }

  .button-controls {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  button {
    min-width: 0;
  }

  .keyboard-hint {
    font-size: 0.52rem;
  }
}

@media (max-width: 360px) {
  .keyboard-hint,
  .telemetry-coordinate {
    display: none;
  }

  .telemetry {
    bottom: 171px;
  }

  .control-deck {
    gap: 4px 10px;
    padding: 7px;
  }

  .button-controls {
    gap: 5px;
  }

  button {
    font-size: 0.68rem;
  }

  .range-heading {
    font-size: 0.62rem;
  }
}

@media (orientation: landscape) and (max-height: 480px) {
  .back-link {
    top: 8px;
    left: 8px;
  }

  .telemetry {
    top: 14px;
    right: 16px;
    bottom: auto;
  }

  .control-deck {
    right: 8px;
    bottom: 8px;
    left: 8px;
    grid-template-columns: minmax(190px, auto) minmax(140px, 1fr) minmax(140px, 1fr);
    gap: 8px 14px;
    width: calc(100% - 16px);
    padding: 7px 9px;
  }

  .button-controls {
    grid-column: auto;
    display: flex;
  }

  button {
    min-width: 90px;
  }

  .keyboard-hint,
  .range-ends {
    display: none;
  }
}

@media (pointer: coarse) {
  #depth-canvas {
    cursor: default;
  }
}

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

@media (forced-colors: active) {
  :root {
    --void: Canvas;
    --chalk: CanvasText;
    --fog: CanvasText;
    --shade: Canvas;
    --focus: Highlight;
    --hairline: CanvasText;
    --panel: Canvas;
  }

  #depth-canvas {
    forced-color-adjust: none;
  }

  button,
  .control-deck,
  .view-reticle {
    border-color: CanvasText;
  }
}