:root {
  --bg: #0b0d14;
  --fg: #e7ebf5;
  --muted: #8b93a8;
  --accent: #ffb86c;
  --warn: #ff6b6b;
  --panel: #151926;
  --border: #242a3b;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.5 system-ui, -apple-system, "Helvetica Neue", sans-serif;
}

body {
  max-width: 980px;
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

header h1 {
  margin: 0 0 0.4rem;
  font-size: 1.8rem;
  letter-spacing: -0.01em;
}

header .tag {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

code {
  background: var(--panel);
  padding: 1px 5px;
  border-radius: 3px;
  font-size: 0.9em;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  padding: 0.9rem 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 1.25rem;
}

.controls label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.controls .val {
  min-width: 3ch;
  text-align: right;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.controls input[type="range"] { width: 140px; }

button, select {
  background: #1e2436;
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.45rem 0.85rem;
  font-size: 0.9rem;
  font-family: inherit;
  cursor: pointer;
}

button:hover { border-color: var(--accent); }
button.warn { border-color: #6b3333; }
button.warn:hover { border-color: var(--warn); color: var(--warn); }

.canvases {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

figure {
  margin: 0;
  padding: 0;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

figcaption {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.55rem 0.9rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.time {
  color: var(--accent);
  font-variant-numeric: tabular-nums;
  font-size: 0.82rem;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  image-rendering: pixelated;
  cursor: crosshair;
  touch-action: none;
}

.presets h2 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 0.6rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.preset-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.preset-row button small {
  opacity: 0.65;
  margin-left: 0.3rem;
  font-size: 0.8em;
}

.presets .note {
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0;
}

.viewport {
  margin: 1.75rem 0 1rem;
  padding: 0.9rem 1rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.viewport dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  column-gap: 1rem;
  row-gap: 0.35rem;
  margin: 0 0 0.75rem;
}

.viewport dt {
  color: var(--muted);
  font-size: 0.85rem;
}

.viewport dd {
  margin: 0;
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}

.viewport .help {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

footer {
  margin-top: 2rem;
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}

footer a {
  color: var(--fg);
  text-decoration: underline;
  text-decoration-color: var(--border);
}

@media (max-width: 640px) {
  .canvases { grid-template-columns: 1fr; }
}