:root {
  --bg: #0c0c12;
  --panel: #15151e;
  --line: #2a2a38;
  --text: #e6e4ee;
  --muted: #9a97ab;
  --accent: #ffbe3c;
  color-scheme: dark;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}

header {
  padding: 14px 20px 6px;
}

h1 {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0.02em;
}

header p {
  margin: 4px 0 0;
  color: var(--muted);
}

main {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 16px;
  padding: 10px 20px 20px;
}

.stage {
  margin: 0;
  min-width: 0;
}

figcaption {
  font-weight: 600;
  margin-bottom: 6px;
}

.hint {
  font-weight: 400;
  color: var(--muted);
  font-size: 12px;
  margin-left: 6px;
}

#stage {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #101018;
  border: 1px solid var(--line);
  border-radius: 8px;
  touch-action: none;
  cursor: default;
}

#stage:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.status {
  margin: 6px 0 0;
  color: var(--muted);
  min-height: 1.45em;
}

.panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.panel section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px 12px;
}

h2 {
  margin: 0 0 8px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

label {
  display: block;
  margin-top: 8px;
}

select {
  display: block;
  width: 100%;
  margin-top: 3px;
}

select, button {
  font: inherit;
  color: var(--text);
  background: #1f1f2b;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 5px 8px;
}

button {
  cursor: pointer;
}

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

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #1a1408;
  font-weight: 600;
}

button.wide {
  width: 100%;
  margin-top: 8px;
}

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

.modes {
  display: flex;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.modes button {
  flex: 1;
  border: 0;
  border-radius: 0;
  background: var(--panel);
  color: var(--muted);
  padding: 8px;
}

.modes button[aria-pressed="true"] {
  background: #262636;
  color: var(--text);
  box-shadow: inset 0 -2px 0 var(--accent);
}

input[type="range"] {
  display: block;
  width: 100%;
  margin-top: 3px;
  accent-color: var(--accent);
}

input[type="number"] {
  display: block;
  width: 100%;
  margin-top: 3px;
  font: inherit;
  color: var(--text);
  background: #1f1f2b;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 4px 6px;
  font-variant-numeric: tabular-nums;
}

.bars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 10px;
}

.bars label {
  margin-top: 4px;
  font-size: 13px;
}

label.row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.buttons button {
  flex: 1;
}

kbd {
  font: 11px ui-monospace, monospace;
  opacity: 0.7;
  margin-left: 4px;
}

.results {
  width: 100%;
  margin: 8px 0 10px;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
  font-size: 11.5px;
}

.results th, .results td {
  text-align: right;
  padding: 3px 2px;
  border-bottom: 1px solid var(--line);
}

.results th {
  font-weight: 500;
  color: var(--muted);
}

.results td:first-child, .results td:nth-child(2) {
  text-align: left;
  white-space: nowrap;
}

button:disabled {
  opacity: 0.45;
  cursor: default;
}

.ramp {
  display: flex;
  justify-content: space-between;
  margin: 6px 0 0 26px;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 11px;
  color: #0c0c12;
  background: linear-gradient(90deg, rgb(64, 80, 190), rgb(33, 113, 181), rgb(32, 170, 160), rgb(120, 205, 90), rgb(253, 231, 37));
}

.ramp span:first-child {
  color: var(--text);
}

.readout {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 10px;
  margin: 10px 0 0;
  font-variant-numeric: tabular-nums;
}

.readout dt {
  color: var(--muted);
}

.readout dd {
  margin: 0;
}

.note {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 820px) {
  main {
    grid-template-columns: 1fr;
    padding: 10px 16px 16px;
  }
  header {
    padding: 12px 16px 4px;
  }
}