:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --primary-color: #2196f3;
    --secondary-color: #ff9800;
    --cell-color: #e0e0e0;
    --mine-color: #f44336;
    --flag-color: #4caf50;
    --revealed-color: #f5f5f5;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #ffffff;
    --cell-color: #2d2d2d;
    --revealed-color: #1e1e1e;
}

* {
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

body {
    margin: 0;
    padding: 20px;
    font-family: 'Arial', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.controls button,
.game-controls button,
select {
    padding: 8px 16px;
    margin: 4px;
    border: none;
    border-radius: 4px;
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
}

.board {
    display: grid;
    gap: 2px;
    background-color: var(--text-color);
    padding: 2px;
    border-radius: 4px;
}

.cell {
    aspect-ratio: 1;
    background-color: var(--cell-color);
    border: none;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cell.revealed {
    background-color: var(--revealed-color);
}

.cell.mine {
    background-color: var(--mine-color);
}

.cell.flagged {
    background-color: var(--flag-color);
}

.stats {
    display: flex;
    gap: 20px;
    margin: 10px 0;
    font-size: 1.2em;
}

#message {
    margin-top: 20px;
    font-size: 1.5em;
    text-align: center;
    min-height: 2em;
}

@media (max-width: 600px) {
    .header {
        flex-direction: column;
        gap: 10px;
    }

    .cell {
        min-width: 30px;
        font-size: 0.8em;
    }

    .controls button,
    .game-controls button,
    select {
        padding: 6px 12px;
        font-size: 0.9em;
    }

    .stats {
        font-size: 1em;
    }

    html {
        touch-action: manipulation;
    }
}

.cell.touching {
    filter: brightness(0.8);
    transform: scale(0.95);
}