/* Sudoku Game Styles */

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    min-height: 100vh;
    color: var(--text-primary);
    overflow-x: hidden;
}

.game-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

.game-header .score {
    display: none;
}

.game-header .timer {
    display: block;
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-left: 15px;
}

.win-message .final-score {
    display: none;
}

.win-message .final-time {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-gold);
    margin-bottom: 20px;
}

.sudoku-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    padding: 30px;
}

.sudoku-grid {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 0;
    border: 3px solid var(--accent-gold);
    background: var(--surface-card);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255,255,255,0.05);
    border-radius: 8px;
}

.sudoku-cell {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid rgba(0, 0, 0, 0.15);
    transition: all 0.15s ease;
    user-select: none;
    color: var(--text-primary);
}

.sudoku-cell:hover {
    background: rgba(212, 175, 55, 0.15);
}

.sudoku-cell.selected {
    background: rgba(212, 175, 55, 0.35);
    box-shadow: inset 0 0 0 2px var(--accent-gold);
}

.sudoku-cell.given {
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-weight: 700;
    cursor: default;
}

.sudoku-cell.given:hover {
    background: var(--bg-secondary);
}

.sudoku-cell.filled {
    background: rgba(212, 175, 55, 0.08);
    color: var(--accent-gold);
}

.sudoku-cell.error {
    color: #e53935;
    background: rgba(229, 57, 53, 0.15);
}

.sudoku-cell.border-right {
    border-right: 2px solid var(--accent-gold);
}

.sudoku-cell.border-bottom {
    border-bottom: 2px solid var(--accent-gold);
}

.number-pad {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    max-width: 280px;
}

.num-btn {
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--button-bg);
    border: 2px solid var(--accent-gold);
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.num-btn:hover {
    background: var(--button-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.num-btn:active {
    transform: translateY(0);
}

.num-btn.erase {
    font-size: 1.75rem;
    background: rgba(229, 57, 53, 0.15);
    border-color: #e53935;
    color: #e53935;
}

.num-btn.erase:hover {
    background: rgba(229, 57, 53, 0.3);
}

/* Difficulty selector */
#difficulty-select {
    padding: 8px 16px;
    font-size: 0.9rem;
    background: var(--button-bg);
    border: 1px solid var(--accent-gold);
    border-radius: 4px;
    color: var(--text-primary);
    cursor: pointer;
}

#difficulty-select:focus {
    outline: 2px solid var(--accent-gold);
    outline-offset: 2px;
}

@media (max-width: 500px) {
    .sudoku-cell {
        width: 34px;
        height: 34px;
        font-size: 1.1rem;
    }
    
    .number-pad {
        max-width: 240px;
    }
    
    .num-btn {
        width: 42px;
        height: 42px;
        font-size: 1.25rem;
    }
}

@media (max-width: 380px) {
    .sudoku-cell {
        width: 30px;
        height: 30px;
        font-size: 1rem;
    }
}