.sudoku-game{padding:var(--space-4);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.sudoku-toolbar,.sudoku-actions{display:flex;flex-wrap:wrap;align-items:end;gap:var(--space-3);justify-content:space-between}.sudoku-toolbar label{display:grid;gap:var(--space-1);color:var(--color-ink-muted);font-weight:700}.sudoku-toolbar select{min-height:2.75rem;padding:var(--space-2) var(--space-3);color:var(--color-ink);background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-sm)}.sudoku-timer{padding:var(--space-3);color:var(--color-ink-muted);background:var(--color-surface-muted);border-radius:var(--radius-sm);font-size:.875rem}.sudoku-timer strong{display:block;color:var(--color-ink);font-size:1.25rem}.sudoku-actions{margin:var(--space-4) 0;justify-content:flex-start}.sudoku-message{min-height:1.6rem;color:var(--color-ink);font-weight:650}.sudoku-board{display:grid;width:min(100%,36rem);aspect-ratio:1;grid-template-columns:repeat(9,1fr);margin-inline:auto;border:2px solid var(--color-ink)}.sudoku-cell{display:grid;min-width:0;place-items:center;padding:0;color:var(--color-primary);background:var(--color-surface);border:0;border-right:1px solid var(--color-border);border-bottom:1px solid var(--color-border);font-size:clamp(.9rem,5vw,1.5rem);font-weight:700;cursor:pointer}.sudoku-cell:nth-child(3n){border-right:2px solid var(--color-ink)}.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(--color-ink)}.sudoku-cell--given{color:var(--color-ink);background:var(--color-surface-muted)}.sudoku-cell.is-related{background:#f0f4ff}.sudoku-cell.is-selected{background:var(--color-primary-soft);box-shadow:inset 0 0 0 3px var(--color-primary)}.sudoku-cell.is-conflict{color:var(--color-error);background:var(--color-error-soft);text-decoration:underline;text-decoration-thickness:2px}.sudoku-keypad{display:grid;grid-template-columns:repeat(5,1fr);gap:var(--space-2);margin-top:var(--space-4)}.sudoku-keypad button{min-height:3rem;color:var(--color-ink);background:var(--color-surface-muted);border:1px solid var(--color-border);border-radius:var(--radius-sm);font-weight:700;cursor:pointer}.sudoku-keypad button:hover,.sudoku-keypad button:active{color:var(--color-primary);border-color:var(--color-primary);background:var(--color-primary-soft)}.sudoku-keypad__erase{grid-column:1 / -1}@media(min-width:48rem){.sudoku-game{padding:var(--space-5)}.sudoku-keypad{grid-template-columns:repeat(9,1fr)}}