.pipes-game-container {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.pipes-grid {
    display: grid;
    gap: 2px;
    background-color: #333;
    padding: 2px;
    border-radius: 4px;
}

.pipe-tile {
    width: 60px;
    height: 60px;
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 40px;
    cursor: pointer;
    user-select: none;
    font-family: monospace;
    line-height: 1;
}

.pipe-tile:hover {
    background-color: #f0f0f0;
}

.pipes-grid.solved {
    background-color: #4caf50;
}

.pipes-grid.solved .pipe-tile {
    background-color: #e8f5e9;
    color: #2e7d32;
}