.board-wrap {
  width: 100%;
  display: flex;
  justify-content: center;
}

.sudoku-board {
  width: min(100%, 560px);
  aspect-ratio: 1;
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  grid-template-rows: repeat(9, 1fr);
  border: 3px solid var(--line-strong);
  border-radius: 16px;
  overflow: hidden;
  background: var(--line-strong);
}

.sudoku-cell {
  width: 100%;
  height: 100%;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  text-align: center;
  font-size: clamp(1.1rem, 4.4vw, 2rem);
  font-weight: 800;
  outline: none;
  transition: background 0.15s ease, box-shadow 0.15s ease, color 0.15s ease;
  touch-action: manipulation;
  -moz-appearance: textfield;
}

.sudoku-cell::-webkit-outer-spin-button,
.sudoku-cell::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}


.access-level-pill,
.access-level-chip {
  border: 1px solid transparent;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.22);
}

.access-level-basic {
  background: var(--badge-basic-bg);
  color: var(--badge-basic-ink);
  border-color: var(--badge-basic-border);
}

.access-level-limited {
  background: var(--badge-limited-bg);
  color: var(--badge-limited-ink);
  border-color: var(--badge-limited-border);
}

.access-level-full {
  background: var(--badge-full-bg);
  color: var(--badge-full-ink);
  border-color: var(--badge-full-border);
}

.access-level-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 30px;
  padding: 7px 11px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 950;
  line-height: 1;
  white-space: nowrap;
}

.access-head .access-level-chip {
  box-shadow: none;
}

.sudoku-cell:nth-child(3n) {
  border-right: 3px solid var(--line-strong);
}

.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: 3px solid var(--line-strong);
}

.sudoku-cell:nth-child(n + 73) {
  border-bottom: 0;
}

.sudoku-cell.is-given {
  background-color: var(--given-bg);
  color: var(--given-ink);
}

.sudoku-cell.is-highlight {
  background-image: repeating-linear-gradient(135deg, var(--assist-line) 0, var(--assist-line) 7px, transparent 7px, transparent 14px);
}

.sudoku-cell.is-highlight.is-value-line {
  background-image: repeating-linear-gradient(135deg, var(--value-line) 0, var(--value-line) 7px, transparent 7px, transparent 14px);
}

.sudoku-cell.is-highlight.is-value-line.has-blue-overlap-value {
  background-image: repeating-linear-gradient(135deg, var(--assist-line) 0, var(--assist-line) 7px, transparent 7px, transparent 14px);
}

.sudoku-cell.is-placed,
.sudoku-cell.is-restored {
  background-color: var(--good);
  color: var(--good-ink);
}

.sudoku-cell.is-hint {
  background-color: var(--hint);
  color: var(--hint-ink);
}

.sudoku-cell.is-guessed {
  background-color: var(--guess);
  color: var(--guess-ink);
}

.sudoku-cell.is-persisted-guess,
.sudoku-cell.is-persisted-hint {
  color: var(--guess-ink);
}

.sudoku-cell.is-removed,
.sudoku-cell.is-failed {
  background-color: var(--remove);
  color: var(--remove-ink);
}

.sudoku-cell.is-conflict {
  background-color: var(--bad);
  color: var(--bad-ink);
}

.sudoku-cell.is-active {
  box-shadow: inset 0 0 0 4px var(--accent);
  z-index: 2;
}

.sudoku-cell-slot {
  position: relative;
  min-width: 0;
  min-height: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  overflow: hidden;
}

.sudoku-cell-slot:nth-child(3n) {
  border-right: 3px solid var(--line-strong);
}

.sudoku-cell-slot:nth-child(9n) {
  border-right: 0;
}

.sudoku-cell-slot:nth-child(n + 19):nth-child(-n + 27),
.sudoku-cell-slot:nth-child(n + 46):nth-child(-n + 54) {
  border-bottom: 3px solid var(--line-strong);
}

.sudoku-cell-slot:nth-child(n + 73) {
  border-bottom: 0;
}

.sudoku-cell-slot .sudoku-cell {
  position: absolute;
  inset: 0;
  z-index: 2;
  border: 0;
  background: transparent;
  color: inherit;
}

.sudoku-cell-slot .sudoku-cell.is-active {
  box-shadow: none;
}

.sudoku-cell-slot.is-given {
  background-color: var(--given-bg);
  color: var(--given-ink);
}

.sudoku-cell-slot.is-highlight {
  background-image: repeating-linear-gradient(135deg, var(--assist-line) 0, var(--assist-line) 7px, transparent 7px, transparent 14px);
}

.sudoku-cell-slot.is-highlight.is-value-line {
  background-image: repeating-linear-gradient(135deg, var(--value-line) 0, var(--value-line) 7px, transparent 7px, transparent 14px);
}

.sudoku-cell-slot.is-highlight.is-value-line.has-blue-overlap-value {
  background-image: repeating-linear-gradient(135deg, var(--assist-line) 0, var(--assist-line) 7px, transparent 7px, transparent 14px);
}

.sudoku-cell-slot.is-value-line {
  background-image: repeating-linear-gradient(135deg, var(--value-line) 0, var(--value-line) 7px, transparent 7px, transparent 14px);
}

.sudoku-cell-slot.is-value-match::after {
  content: '';
  position: absolute;
  inset: 7px;
  border-radius: 999px;
  border: 2px solid var(--value-match);
  pointer-events: none;
  z-index: 3;
}

.sudoku-cell-slot.is-placed,
.sudoku-cell-slot.is-restored {
  background-color: var(--good);
  color: var(--good-ink);
}

.sudoku-cell-slot.is-hint {
  background-color: var(--hint);
  color: var(--hint-ink);
}

.sudoku-cell-slot.is-guessed,
.sudoku-cell-slot.is-candidate-target {
  background-color: var(--guess);
  color: var(--guess-ink);
}

.sudoku-cell-slot.is-persisted-guess,
.sudoku-cell-slot.is-persisted-hint {
  color: var(--guess-ink);
}

.sudoku-cell-slot.is-removed,
.sudoku-cell-slot.is-failed {
  background-color: var(--remove);
  color: var(--remove-ink);
}

.sudoku-cell-slot.is-conflict {
  background-color: var(--bad);
  color: var(--bad-ink);
}

.sudoku-cell-slot.is-active {
  box-shadow: inset 0 0 0 4px var(--accent);
  z-index: 2;
}

.sudoku-cell-slot.has-candidates .sudoku-cell {
  color: transparent;
  caret-color: var(--ink);
}

.candidate-grid {
  position: absolute;
  inset: 8%;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  grid-template-rows: repeat(3, minmax(0, 1fr));
  place-items: center;
  color: var(--muted);
  font-size: clamp(0.5rem, 1.45vw, 0.85rem);
  font-weight: 800;
  line-height: 1;
  pointer-events: none;
}

.candidate-mark {
  opacity: 0;
}

.candidate-mark.is-visible {
  opacity: 1;
}