:root {
  color-scheme: light dark;
  --gap: 2px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, sans-serif;
  max-width: 900px;
  margin: 2rem auto;
  padding: 0 1rem;
  line-height: 1.5;
}

header p {
  color: #666;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.controls label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.controls input[type='number'] {
  width: 4rem;
}

.presets {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(var(--cols), 1fr);
  grid-template-rows: repeat(var(--rows), 1fr);
  gap: var(--gap);
  aspect-ratio: var(--cols) / var(--rows);
  border: 1px solid #888;
  padding: var(--gap);
}

.cell {
  background: #fff;
  border: 1px solid #ccc;
  padding: 0;
  cursor: pointer;
}

.cell[aria-pressed='true'] {
  background: #222;
  border-color: #222;
}

.preview {
  border: 1px solid #888;
  padding: 0.5rem;
}

.preview svg {
  width: 100%;
  height: auto;
  display: block;
}

pre {
  background: #f5f5f5;
  padding: 0.5rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

#stats {
  font-weight: 600;
}