/* Chess table — Author: Dave Greenlaw */

.ch-app {
  --ch-sq-light: color-mix(in srgb, var(--surface, #f3ead8) 88%, #fff);
  --ch-sq-dark: color-mix(in srgb, var(--accent, #2563eb) 22%, var(--surface, #cbb894));
}

.ch-app .ch-stage {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.ch-felt {
  display: flex;
  justify-content: center;
}

.ch-board {
  display: grid;
  grid-template-rows: repeat(8, 1fr) auto;
  width: min(78vw, 30rem);
  aspect-ratio: 8 / 8.45;
  border: 1px solid var(--border, #c4b8a4);
  border-radius: 8px;
  overflow: hidden;
  background: var(--surface, #f6f1e7);
  color: var(--text, #1a1a1a);
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--text, #2a241c) 8%, transparent);
}

.ch-row,
.ch-files {
  display: grid;
  grid-template-columns: 1.1rem repeat(8, 1fr);
}

.ch-files {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-muted, #5c6470);
  text-align: center;
  padding: 2px 0 4px;
}

.ch-rank {
  display: grid;
  place-items: center;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-muted, #5c6470);
}

.ch-sq {
  position: relative;
  display: grid;
  place-items: center;
  border: 0;
  padding: 0;
  min-width: 0;
  min-height: 0;
  background: var(--ch-sq-light);
  color: inherit;
  font: inherit;
}

.ch-sq.is-dark {
  background: var(--ch-sq-dark);
}

.ch-sq.is-legal {
  box-shadow: inset 0 0 0 2px var(--accent, #2563eb);
  cursor: pointer;
}

.ch-sq.is-picked {
  box-shadow: inset 0 0 0 3px var(--accent, #2563eb);
}

.ch-sq.is-dest {
  background: color-mix(in srgb, var(--accent, #2563eb) 38%, var(--ch-sq-light));
  cursor: pointer;
}

.ch-sq.is-last {
  box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--accent, #2563eb) 55%, #f5d76e);
}

.ch-sq.is-check {
  background: color-mix(in srgb, #b42318 42%, var(--ch-sq-light));
}

.ch-piece {
  font-size: clamp(1.35rem, 6vw, 2.15rem);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.ch-piece--w {
  color: color-mix(in srgb, var(--surface, #fff) 92%, #f8f4ea);
  text-shadow:
    0 0 1px var(--text, #1a1a1a),
    0 1px 0 color-mix(in srgb, var(--text, #1a1a1a) 55%, transparent);
}

.ch-piece--b {
  color: color-mix(in srgb, var(--text, #1a1a1a) 92%, #111);
}

.ch-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  min-height: 2.25rem;
  align-items: center;
}

.ch-app .fk-over-stamp.ch-over {
  pointer-events: auto;
  transform: none;
  align-self: stretch;
  width: auto;
  max-width: none;
  margin: 2px 0 4px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 2px solid var(--accent, #2563eb);
  background: color-mix(in srgb, var(--surface, #fff) 88%, var(--accent, #2563eb));
  color: var(--text, #1a1a1a);
}

.ch-over strong {
  font-size: 1.35rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 900;
  color: var(--accent, #2563eb);
}

.ch-over__win {
  display: block;
  margin-top: 4px;
  font-weight: 800;
  text-align: center;
}

/* Dark / soft / glass: keep a cream vs wood checkerboard so pieces stay visible. */
html[data-theme="dark"] .ch-app,
html[data-theme="soft"] .ch-app,
html[data-theme="glass"] .ch-app {
  --ch-sq-light: color-mix(in srgb, #f3ead8 90%, var(--accent, #8ab4f8));
  --ch-sq-dark: color-mix(in srgb, #7a6648 78%, var(--accent, #8ab4f8));
}

html[data-theme="dark"] .ch-piece--w,
html[data-theme="soft"] .ch-piece--w,
html[data-theme="glass"] .ch-piece--w {
  color: #f4efe4;
  text-shadow: 0 0 1px #000, 0 1px 0 #000;
}

html[data-theme="dark"] .ch-piece--b,
html[data-theme="soft"] .ch-piece--b,
html[data-theme="glass"] .ch-piece--b {
  color: #0d0d0d;
  text-shadow: 0 0 1px #fff;
}

html[data-theme="dark"] .ch-over,
html[data-theme="soft"] .ch-over {
  background: color-mix(in srgb, var(--surface, #111) 80%, var(--accent, #60a5fa));
  border-color: var(--accent, #60a5fa);
  color: var(--text, #eee);
}

html[data-theme="glass"] .ch-over {
  background: color-mix(in srgb, var(--surface, #111) 55%, transparent);
  border-color: color-mix(in srgb, var(--accent, #93c5fd) 70%, #fff);
}

html[data-a11y-view="contrast"] .ch-sq.is-legal,
html[data-a11y-view="contrast"] .ch-sq.is-picked {
  box-shadow: inset 0 0 0 3px var(--text, #000);
}

html[data-a11y-view="contrast"] .ch-app {
  --ch-sq-dark: color-mix(in srgb, var(--text, #000) 28%, var(--surface, #ccc));
}

html[data-theme="dark"][data-a11y-view="contrast"] .ch-app,
html[data-theme="soft"][data-a11y-view="contrast"] .ch-app,
html[data-theme="glass"][data-a11y-view="contrast"] .ch-app {
  --ch-sq-light: #f7f1e4;
  --ch-sq-dark: #5c4a32;
}

html[data-a11y-view="comfort"] .ch-piece {
  font-size: clamp(1.55rem, 6.5vw, 2.4rem);
}

html[data-a11y-view="comfort"] .ch-over strong {
  letter-spacing: 0.06em;
}