/* Sudoku extends the existing game board, control and theme owners. */
.sudoku-layout {
  grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
}
.sudoku-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
}
.sudoku-toolbar label {
  font-size: 13px;
  color: var(--muted);
}
.sudoku-toolbar select {
  width: auto;
  min-width: 84px;
  flex: 1;
}
.sudoku-toolbar .lab-btn {
  white-space: nowrap;
}
.sudoku-metrics {
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 18px;
}
.sudoku-metrics div {
  min-width: 0;
}
.sudoku-metrics dd {
  font-size: 21px;
}
.sudoku-board {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  border: 2px solid var(--fg);
  border-radius: 4px;
  overflow: clip;
  background: var(--card);
}
.sudoku-cell {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  min-width: 0;
  padding: 0;
  border: 0;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
  background: var(--card);
  color: var(--primary);
  font-family: var(--font-body);
  font-size: clamp(18px, 3.5vw, 27px);
  font-variant-numeric: tabular-nums;
  font-weight: 500;
  cursor: pointer;
  touch-action: manipulation;
}
.sudoku-cell:nth-child(3n) {
  border-right: 2px solid var(--fg);
}
.sudoku-cell:nth-child(9n) {
  border-right: 0;
}
.sudoku-cell:nth-child(n + 19):nth-child(-n + 27),
.sudoku-cell:nth-child(n + 46):nth-child(-n + 54) {
  border-bottom: 2px solid var(--fg);
}
.sudoku-cell:nth-child(n + 73) {
  border-bottom: 0;
}
.sudoku-cell.is-peer {
  background: var(--surface-soft);
}
.sudoku-cell.is-same {
  background: var(--primary-soft);
}
.sudoku-cell[data-given="true"] {
  color: var(--fg);
  font-weight: 650;
}
.sudoku-cell:hover {
  background: var(--primary-soft);
}
.sudoku-cell.is-selected {
  background: var(--primary-soft);
  box-shadow: inset 0 0 0 2px var(--primary);
  z-index: 1;
}
.sudoku-cell:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: -4px;
  z-index: 2;
}
.sudoku-cell[aria-invalid="true"] {
  color: var(--danger);
  background: var(--danger-soft);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}
.sudoku-cell.is-selected[aria-invalid="true"] {
  box-shadow: inset 0 0 0 2px var(--danger);
}
.sudoku-candidates {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-template-rows: repeat(3, minmax(0, 1fr));
  width: 100%;
  height: 100%;
  padding: 2px;
  line-height: 1;
  font-size: clamp(8px, 1.5vw, 11px);
  font-weight: 500;
  color: var(--primary);
}
.sudoku-candidates span {
  display: grid;
  place-content: center;
}
.sudoku-selection {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
}
.sudoku-selection label {
  flex: 1;
  font-size: 13px;
  color: var(--muted);
}
.sudoku-selection .lab-input {
  width: 108px;
  padding: 9px 8px;
  font-size: 16px;
}
.sudoku-selection + .lab-help {
  margin-top: 9px;
}
.sudoku-keypad {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 7px;
  margin-top: 16px;
}
.sudoku-keypad .lab-btn {
  min-height: 44px;
  padding: 7px 0;
  font-size: 19px;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}
.sudoku-keypad #erase {
  font-size: 13px;
  color: var(--fg);
}
.sudoku-actions {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 7px;
  margin-top: 10px;
}
.sudoku-actions .lab-btn {
  padding: 10px 2px;
  min-height: 44px;
  font-size: 13px;
}
.sudoku-actions [aria-pressed="true"] {
  color: var(--on-primary);
  border-color: var(--primary);
  background: var(--primary);
}
.sudoku-confirm {
  padding: 14px;
  border: 1px solid var(--accent-warm);
  background: var(--warm-soft);
  border-radius: var(--radius-field);
  margin-bottom: 18px;
}
.sudoku-confirm p {
  color: var(--fg);
  font-size: 14px;
  line-height: 1.8;
  margin: 0 0 10px;
}
.sudoku-confirm .lab-actions {
  margin: 0;
}
.sudoku-win {
  padding: 18px;
  border: 1px solid var(--accent-teal);
  border-radius: var(--radius-field);
  background: var(--teal-soft);
  color: var(--accent-teal);
}
.sudoku-win h2 {
  font-size: 20px;
  margin: 0 0 10px;
}
.sudoku-win p {
  font-size: 14px;
  line-height: 1.8;
  margin: 0;
}
.sudoku-win .lab-help {
  margin-top: 8px;
  color: var(--fg);
}
.sudoku-mark {
  display: grid;
  grid-template-columns: repeat(3, 20px);
  grid-template-rows: repeat(3, 20px);
  gap: 1px;
  margin-bottom: 24px;
  color: var(--primary);
  border: 1px solid var(--line);
  width: max-content;
  background: var(--line);
  border-radius: 6px;
  overflow: hidden;
  font-size: 12px;
  font-variant-numeric: tabular-nums;
}
.sudoku-mark span {
  display: grid;
  place-items: center;
  background: var(--primary-soft);
}
.sudoku-tier-note {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-variant-numeric: tabular-nums;
}
@media (max-width: 760px) {
  .sudoku-layout {
    grid-template-columns: minmax(0, 1fr);
  }
  .sudoku-stage.lab-panel {
    max-width: 480px;
  }
  .sudoku-rules {
    max-width: 480px;
    width: 100%;
    margin: 0 auto;
  }
  .sudoku-cell {
    font-size: clamp(18px, 5vw, 27px);
  }
  .sudoku-candidates {
    font-size: clamp(8px, 2.1vw, 11px);
  }
}
@media (max-width: 360px) {
  .sudoku-toolbar {
    gap: 7px;
  }
  .sudoku-toolbar select {
    min-width: 68px;
    padding: 9px 7px;
  }
  .sudoku-toolbar .lab-btn {
    padding: 10px 9px;
  }
  .sudoku-keypad {
    gap: 6px;
  }
  .sudoku-metrics dd {
    font-size: 18px;
  }
}
@media (forced-colors: active) {
  .sudoku-cell.is-selected {
    outline: 2px solid Highlight;
    outline-offset: -3px;
  }
  .sudoku-cell[aria-invalid="true"] {
    outline: 1px dashed Mark;
    outline-offset: -3px;
  }
}