/*
    Sudoku puzzle styling — grid, controls, keypad.
    Shared "puzzle chrome" (breadcrumb, title row, pills, buttons, success
    banner) lives in main-styles.css. See public/css/tokens.css for the
    design tokens referenced below.
*/

#sudoku_container {
    display: flex;
    flex-flow: row nowrap;
    justify-content: center;
    flex-wrap: wrap;
    gap: 28px;
}

.sudoku-grid {
    padding: 0;
}

.sudoku-cells {
    display: flex;
    flex-flow: column nowrap;
    border-top: 2px solid var(--border-strong);
    border-left: 2px solid var(--border-strong);
}

.sudoku-row-cells {
    display: flex;
    flex-flow: row nowrap;
}

.sudoku-cell {
    border: none;
    border-right: 1px solid var(--border-input);
    border-bottom: 1px solid var(--border-input);
    width: 44px;
    height: 44px;
    box-sizing: border-box;
    text-align: center;
    font-size: 18px;
    font-family: var(--font-body);
    background: #fff;
    color: var(--text-primary);
    padding: 0;
    margin: 0;
    border-radius: 0;
}

.sudoku_cell.sudoku-col-separator .sudoku-cell {
    border-right: 2px solid var(--border-strong);
}

.sudoku-row.sudoku-row-separator .sudoku-cell {
    border-bottom: 2px solid var(--border-strong);
}

#sudoku_controls {
    width: 220px;
    display: flex;
    flex-flow: column nowrap;
    gap: 20px;
}

/* Visual states */
.sudoku-cell-fixed {
    background: var(--surface-card);
    font-weight: 700;
    color: var(--text-primary);
}

.sudoku-cell-correct,
.sudoku-cell-solved {
    background: var(--accent-sage-tint-cell);
}

.sudoku-cell-incorrect {
    background: var(--accent-error-tint);
}

.sudoku-cell-hint {
    background: var(--accent-clay-tint);
    font-weight: 700;
}

.sudoku-cell:focus {
    outline: 2px solid var(--accent-clay);
    outline-offset: -2px;
}

/* Controls layout */
.controls-set {
    display: flex;
    flex-flow: column nowrap;
}

.sudoku-controls-row {
    display: flex;
    flex-flow: row nowrap;
    align-items: center;
    gap: 8px;
}

.sudoku-controls-row.flow-col {
    flex-direction: column;
    align-items: stretch;
}

.sudoku-controls-row.flow-col .puzzle-btn {
    width: 100%;
}

/* keypad styles */
#sudoku_keypad {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

#sudoku_keypad .key-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
}

.key-row-actions {
    grid-template-columns: repeat(2, 1fr);
}

.sudoku-keypad-btn {
    min-height: 44px;
    padding: 8px;
    border: none;
    background: var(--neutral-fill);
    border-radius: var(--radius-tile);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
}

.sudoku-keypad-btn:active {
    background: var(--accent-clay-tint);
}

@media (max-width: 480px) {
    .sudoku-cell { width: 36px; height: 36px; font-size: 16px; }
}

/* small responsive tweak */
@media (max-width: 700px) {
    #sudoku_container {
        flex-direction: column;
        align-items: center;
    }

    #sudoku_controls {
        width: 100%;
        max-width: 396px;
        margin-top: 4px;
    }
}