/* Elementary cellular automaton explorer. Uses the site's colour tokens. */

.ca-label, .ca-ctl label {
  display: block; font-size: .78rem; font-weight: 600; color: var(--muted);
  text-transform: uppercase; letter-spacing: .04em; margin-bottom: 4px;
}
.ca-label { display: inline-block; }

/* Toolbar */
.ca-toolbar {
  display: flex; flex-wrap: wrap; align-items: flex-end; gap: 16px 28px;
  padding: 14px 16px; margin-bottom: 20px;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line); border-radius: 12px;
}
@media (min-width: 760px) {
  .ca-toolbar { position: sticky; top: 64px; z-index: 5; }
}
.ca-ctl output { font-family: var(--mono); text-transform: none; color: var(--accent); margin-left: 4px; }
.ca-stepper { display: flex; }
.ca-stepper input {
  width: 72px; text-align: center; font: 600 1.1rem var(--mono);
  border: 1px solid var(--line); border-left: 0; border-right: 0;
  background: var(--bg); color: var(--text); padding: 6px 4px; -moz-appearance: textfield;
}
.ca-stepper input::-webkit-inner-spin-button, .ca-stepper input::-webkit-outer-spin-button { -webkit-appearance: none; }
.ca-stepper button, .ca-seg button {
  font: inherit; border: 1px solid var(--line); background: var(--bg); color: var(--text);
  padding: 6px 12px; cursor: pointer;
}
.ca-stepper button { font-size: 1.1rem; }
.ca-stepper button:first-child { border-radius: 8px 0 0 8px; }
.ca-stepper button:last-child { border-radius: 0 8px 8px 0; }
.ca-stepper button:hover, .ca-seg button:hover { background: var(--accent-soft); color: var(--accent); }
.ca-ctl input[type="range"] { width: 150px; accent-color: var(--accent); }
.ca-ctl select {
  font: inherit; padding: 6px 10px; border-radius: 8px;
  border: 1px solid var(--line); background: var(--bg); color: var(--text);
}
.ca-seg { display: flex; }
.ca-seg button + button { border-left: 0; }
.ca-seg button:first-child { border-radius: 8px 0 0 8px; }
.ca-seg button:last-child { border-radius: 0 8px 8px 0; }

/* Rule table + description */
.ca-info { display: flex; flex-wrap: wrap; gap: 16px 32px; align-items: flex-start; margin-bottom: 24px; }
.ca-bits { display: flex; gap: 6px; }
.ca-bit {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 6px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--surface); cursor: pointer;
}
.ca-bit:hover { border-color: var(--accent); }
.ca-bit i { display: block; width: 10px; height: 10px; border: 1px solid var(--muted); background: var(--surface); }
.ca-bit i.on { background: var(--text); border-color: var(--text); }
.ca-bit .pat { display: flex; }
.ca-bit .pat i + i { border-left: 0; }
.ca-bit .out i { width: 10px; height: 10px; }
.ca-binary { font: .78rem var(--mono); color: var(--muted); margin: 6px 0 0; }
.ca-about { flex: 1; min-width: 240px; }
.ca-note { margin: 0 0 8px; font-size: 1rem; }
.ca-note:empty { display: none; }
.ca-related { margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: .88rem; }
.ca-related .ca-label { margin: 0 4px 0 0; }

/* Chips */
.ca-chip {
  font: .78rem var(--mono); min-width: 34px; padding: 3px 6px;
  border: 1px solid var(--line); border-radius: 6px;
  background: var(--surface); color: var(--muted); cursor: pointer;
}
.ca-chip:hover { border-color: var(--accent); color: var(--accent); }
.ca-chip.is-star { color: var(--accent); font-weight: 600; border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
.ca-chip--big { font-size: 1rem; font-weight: 600; min-width: 52px; padding: 8px 10px; color: var(--text); border-radius: 8px; }
.ca-chip.is-family { border-style: dashed; border-color: var(--accent); color: var(--accent); }
.ca-chip.is-current { background: var(--accent); border-color: var(--accent); color: var(--bg); }

/* Featured categories */
.ca-featured {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px;
  padding: 16px; border-radius: 12px; background: var(--accent-soft); margin-bottom: 12px;
}
.ca-cat h3 { font-size: 1rem; }
.ca-cat p { margin: 2px 0 8px; font-size: .82rem; color: var(--muted); }
.ca-chips { display: flex; flex-wrap: wrap; gap: 6px; }

/* All rules */
.ca-all { margin-bottom: 28px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.ca-all summary { cursor: pointer; padding: 10px 16px; font-weight: 600; }
.ca-all > p { margin: 0 16px 12px; }
.ca-groups { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 16px 16px; }
.ca-group { display: flex; gap: 3px; padding: 4px; border: 1px solid var(--line); border-radius: 8px; }
.ca-group.is-featured { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }

/* Canvas */
.ca-stage { overflow: hidden; }
.ca-hint { font-size: .82rem; color: var(--muted); text-align: center; margin: 0 0 6px; }
.ca-seed-wrap { position: relative; margin: 0 auto; border-bottom: 2px solid var(--accent); }
.ca-seed-wrap canvas { display: block; width: 100%; cursor: crosshair; image-rendering: pixelated; }
.ca-cursor { position: absolute; top: 0; bottom: 0; outline: 2px solid var(--accent); pointer-events: none; }
.ca-canvas { position: relative; margin: 0 auto; }
.ca-canvas canvas { position: absolute; left: 0; display: block; image-rendering: pixelated; }

@media (max-width: 600px) {
  .ca-bits { gap: 3px; }
  .ca-bit { padding: 4px; }
  .ca-bit i, .ca-bit .out i { width: 8px; height: 8px; }
}