/* Game-Specific Styles */
.game-section {
    padding: 60px 0;
    background-color: rgba(255, 255, 255, 0.9);
    min-height: calc(100vh - 200px);
}

.game-header {
    text-align: center;
    margin-bottom: 40px;
}

.game-title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    text-align: center;
}

.game-title::after {
    left: 50%;
    transform: translateX(-50%);
    width: 30%;
}

.game-controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-top: 30px;
    padding: 20px;
    background-color: var(--background-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.difficulty-selector {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
}

.difficulty-input {
    padding: 8px 12px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background-color: white;
    color: var(--text-color);
    cursor: pointer;
}

.game-content {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 50px;
    flex-wrap: wrap;
    margin-top: 40px;
}

/* Sudoku Grid Styles */
.sudoku-container {
    background-color: var(--text-color);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    position: relative;
}

.sudoku-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../images/wood-texture.png');
    background-size: cover;
    opacity: 0.1;
    border-radius: 8px;
    z-index: 0;
}

.sudoku-grid {
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: 1px;
    background-color: var(--border-color);
    border: 3px solid var(--border-color);
    position: relative;
    z-index: 1;
}

.sudoku-cell {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: white;
    font-size: 1.5rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    user-select: none;
    font-family: 'Playfair Display', serif;
}

/* Add thicker borders for 3x3 subgrids */
.sudoku-cell:nth-child(3n) {
    border-right: 2px solid var(--text-color);
}

.sudoku-cell:nth-child(9n) {
    border-right: none;
}

.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(--text-color);
}

.sudoku-cell:nth-child(n+73):nth-child(-n+81) {
    border-bottom: none;
}

/* Cell states */
.sudoku-cell.initial {
    color: var(--text-color);
    background-color: #f9f9f9;
    font-weight: 900;
}

.sudoku-cell.user-input {
    color: var(--primary-color);
}

.sudoku-cell.selected {
    background-color: var(--highlight-color);
    transform: scale(1.05);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

.sudoku-cell.highlight {
    background-color: rgba(210, 180, 140, 0.3);
}

.sudoku-cell.error {
    background-color: rgba(139, 0, 0, 0.1);
    color: var(--error-color);
}

.sudoku-cell.success {
    background-color: rgba(101, 67, 33, 0.1);
    color: var(--success-color);
}

/* Number Pad Styles */
.number-pad {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    min-width: 250px;
}

.number-pad-title {
    text-align: center;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.number-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.number-btn {
    padding: 15px;
    font-size: 1.5rem;
    font-weight: 700;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--background-color);
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Playfair Display', serif;
}

.number-btn:hover {
    background-color: var(--highlight-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

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

.number-btn.selected {
    background-color: var(--accent-color);
    color: white;
}

.clear-btn {
    grid-column: span 3;
    background-color: var(--error-color);
    color: white;
    font-size: 1.2rem;
}

.clear-btn:hover {
    background-color: #a52a2a;
    color: white;
}

/* Game Status */
.game-status {
    margin-top: 40px;
    text-align: center;
    padding: 20px;
    background-color: var(--background-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.status-message {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-color);
}

.status-message.success {
    color: var(--success-color);
}

.status-message.error {
    color: var(--error-color);
}

/* Solution Animation */
@keyframes fillIn {
    from {
        opacity: 0;
        transform: scale(0.5);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.sudoku-cell.animated {
    animation: fillIn 0.3s ease-out;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .game-content {
        flex-direction: column;
        align-items: center;
    }

    .sudoku-cell {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .number-pad {
        margin-top: 30px;
        min-width: auto;
        width: 100%;
        max-width: 300px;
    }

    .game-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .difficulty-selector {
        justify-content: center;
    }

    .btn {
        margin-right: 0;
        margin-bottom: 10px;
    }
}

@media (max-width: 480px) {
    .sudoku-cell {
        width: 35px;
        height: 35px;
        font-size: 1.1rem;
    }

    .sudoku-container {
        padding: 15px;
    }

    .number-btn {
        padding: 12px;
        font-size: 1.3rem;
    }

    .game-title {
        font-size: 2rem;
    }
}