/* Sudoku — page-specific styles */

.su-board { display: flex; justify-content: center; }

.su-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 1px;
  width: min(100%, 30rem);
  aspect-ratio: 1;
  background: #d8cfc0;
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 3px solid var(--color-purple);
}

.su-cell {
  position: relative;
  padding: 0;
  border: none;
  background: #fffdf8;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(0.85rem, 3.6vw, 1.4rem);
  color: var(--color-sky-dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s;
}

/* Thicker lines between the three-by-three boxes */
.su-cell.box-right { box-shadow: 2px 0 0 var(--color-purple); }
.su-cell.box-bottom { box-shadow: 0 2px 0 var(--color-purple); }
.su-cell.box-right.box-bottom { box-shadow: 2px 0 0 var(--color-purple), 0 2px 0 var(--color-purple); }

.su-cell.is-given { color: var(--color-text); background: #f6f1e7; cursor: default; }
.su-cell.is-peer { background: #f0f7fb; }
.su-cell.is-same { background: #dcefff; }
.su-cell.is-selected { background: var(--color-sun); }
.su-cell.is-wrong { color: var(--color-coral); }

.su-cell:focus-visible { outline: 2px solid var(--color-coral); outline-offset: -2px; z-index: 2; }
.su-cell:disabled { cursor: default; }

.su-notes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: 100%;
  height: 100%;
  font-size: 0.5em;
  font-weight: 600;
  color: var(--color-text-muted);
  line-height: 1;
}

.su-notes span { display: flex; align-items: center; justify-content: center; }

/* Number pad */
.su-pad {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 0.35rem;
  max-width: 30rem;
  margin: 1rem auto 0;
}

.su-key {
  aspect-ratio: 1;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(0.85rem, 3.4vw, 1.15rem);
  border: 2px solid #e8e2d8;
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  cursor: pointer;
  transition: transform 0.12s, background 0.15s, border-color 0.15s;
}

.su-key:hover:not(:disabled),
.su-key:focus-visible:not(:disabled) {
  transform: translateY(-2px);
  border-color: var(--color-purple);
  background: #fff;
  outline: none;
}

.su-key.is-done { opacity: 0.35; }
.su-key--erase { color: var(--color-coral); }

@media (max-width: 480px) {
  .su-pad { gap: 0.2rem; }
}