:root {
  --bg: #f6f1e7;
  --panel: #fffdf8;
  --line: #ddd2bd;
  --text: #2a2620;
  --muted: #6c6252;
  --accent: #1f3a68;
  --button: #efe7d8;
  --button-hover: #e5dac5;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17140f;
    --panel: #201c16;
    --line: #3a3328;
    --text: #efe8db;
    --muted: #b3a891;
    --accent: #e0a526;
    --button: #2b261e;
    --button-hover: #383126;
    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;
}

header,
footer {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

h1 {
  margin: 8px 0 4px;
  font-size: 1.8rem;
  letter-spacing: 0.02em;
}

.subtitle,
footer {
  color: var(--muted);
  max-width: 72ch;
}

footer {
  font-size: 0.85rem;
}

a {
  color: var(--accent);
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 16px;
  align-items: start;
}

@media (max-width: 860px) {
  main {
    grid-template-columns: minmax(0, 1fr);
  }
}

.tray-wrap {
  position: relative;
  width: 100%;
  max-width: min(100%, 78vh);
  aspect-ratio: 1;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgb(0 0 0 / 0.12);
}

canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

#tray {
  touch-action: none;
  cursor: crosshair;
}

#tray:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: -3px;
}

#overlay {
  pointer-events: none;
}

.stage-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
}

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

.hint,
.note {
  color: var(--muted);
  font-size: 0.85rem;
  margin: 6px 0;
}

kbd {
  font: 0.8rem ui-monospace, monospace;
  padding: 0 4px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--panel);
}

.controls fieldset {
  margin: 0 0 12px;
  padding: 10px 12px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

legend {
  padding: 0 4px;
  font-weight: 600;
}

.tools {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
  gap: 4px;
}

.tools label {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 6px;
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
}

.tools label:has(input:checked) {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.slider {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2px 8px;
  margin-top: 8px;
}

.slider input {
  grid-column: 1 / -1;
  width: 100%;
  accent-color: var(--accent);
}

.slider[hidden] {
  display: none;
}

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

.row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

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

.seed-row input {
  width: 7em;
}

select,
input[type='number'] {
  font: inherit;
  padding: 3px 6px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
}

.swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.swatch {
  width: 34px;
  height: 34px;
  padding: 0;
  border: 2px solid var(--line);
  border-radius: 50%;
  cursor: pointer;
}

.swatch[aria-checked='true'] {
  border-color: var(--text);
  box-shadow: 0 0 0 2px var(--panel), 0 0 0 4px var(--accent);
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.buttons.spaced {
  margin-top: 10px;
}

button {
  font: inherit;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--button);
  color: var(--text);
  cursor: pointer;
}

button:hover:not(:disabled) {
  background: var(--button-hover);
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}

button:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}