:root {
  --bg: #0d0e10;
  --panel: #15171a;
  --line: #2a2d33;
  --text: #e7e4dc;
  --muted: #9a978f;
  --accent: #e9ddc4;
  --plate: #1b1d21;
  --hot: #ff6e28;
  --aspect: 1;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font:
    15px/1.5 system-ui,
    -apple-system,
    'Segoe UI',
    sans-serif;
}

.app {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  min-height: 100vh;
}

.stage {
  display: grid;
  place-items: center;
  padding: 24px;
  position: sticky;
  top: 0;
  height: 100vh;
}

.plate {
  position: relative;
  width: min(100%, calc((100vh - 48px) * var(--aspect)));
  aspect-ratio: var(--aspect);
  background: var(--plate);
  border-radius: 2px;
  box-shadow:
    0 0 0 1px #000,
    0 24px 60px rgb(0 0 0 / 0.5);
}

.plate.is-moving-driver {
  cursor: crosshair;
}

.plate-layer {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#field {
  opacity: 0.85;
}

.driver {
  position: absolute;
  width: 12px;
  height: 12px;
  margin: -6px 0 0 -6px;
  border: 1.5px solid var(--hot);
  border-radius: 50%;
  pointer-events: none;
}

.start {
  position: absolute;
  inset: 0;
  margin: auto;
  width: max-content;
  height: max-content;
  padding: 14px 36px;
  font: inherit;
  font-size: 18px;
  color: #14120d;
  background: var(--accent);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}

.start:hover {
  background: #fff;
}

.panel {
  padding: 24px;
  background: var(--panel);
  border-left: 1px solid var(--line);
  display: grid;
  gap: 20px;
  align-content: start;
}

h1 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 600;
}

p {
  margin: 0 0 8px;
  color: var(--muted);
}

.status {
  color: var(--text);
  font-variant-numeric: tabular-nums;
  margin: 12px 0 0;
}

fieldset {
  margin: 0;
  padding: 0;
  border: 0;
  display: grid;
  gap: 12px;
  min-width: 0;
}

legend {
  padding: 0;
  margin-bottom: 4px;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.stack {
  display: grid;
  gap: 10px;
}

[hidden] {
  display: none !important;
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.unit {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
}

.slider {
  display: grid;
  gap: 4px;
}

.slider > span {
  display: flex;
  justify-content: space-between;
}

.slider output {
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.check {
  display: flex;
  gap: 8px;
  align-items: baseline;
}

input[type='number'],
select {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 8px;
}

input[type='number'] {
  width: 92px;
  text-align: right;
  font-variant-numeric: tabular-nums;
}

input[type='range'] {
  width: 100%;
  accent-color: var(--accent);
}

input[type='checkbox'] {
  accent-color: var(--accent);
}

input[type='file'],
audio {
  width: 100%;
  font: inherit;
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.buttons button {
  flex: 1 1 auto;
  font: inherit;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
}

.buttons button:hover,
.buttons button[aria-pressed='true'] {
  border-color: var(--accent);
  color: var(--accent);
}

.segmented {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.segmented label {
  position: relative;
  text-align: center;
  cursor: pointer;
}

.segmented input {
  position: absolute;
  opacity: 0;
  inset: 0;
  cursor: pointer;
}

.segmented span {
  display: block;
  padding: 6px 4px;
}

.segmented input:checked + span {
  background: var(--accent);
  color: #14120d;
}

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

.spectrum {
  width: 100%;
  height: 120px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
}

.hint {
  font-size: 13px;
  margin: 0;
}

details {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

summary {
  cursor: pointer;
  margin-bottom: 8px;
}

details p {
  font-size: 14px;
}

@media (max-width: 860px) {
  .app {
    grid-template-columns: 1fr;
  }

  .stage {
    position: static;
    height: auto;
    padding: 16px;
  }

  .plate {
    width: min(100%, calc(70vh * var(--aspect)));
  }

  .panel {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}