body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #1e1e1e;
    color: white;
    text-align: center;
}

.tetris-container {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 20px;
}

#tetris-grid {
    width: 200px;
    height: 400px;
    display: grid;
    grid-template-columns: repeat(10, 20px);
    grid-template-rows: repeat(20, 20px);
    background-color: #222;
    border: 2px solid #555;
}

#tetris-grid div {
    width: 20px;
    height: 20px;
    box-sizing: border-box;
    border: 1px solid #333;
}

.filled {
    background-color: #0ff;
}

.next-piece-container {
    margin: 20px 0;
}

.next-piece-container p {
    margin-bottom: 10px;
}

#next-piece-grid {
    width: 60px;
    height: 60px;
    display: grid;
    grid-template-columns: repeat(4, 15px);
    grid-template-rows: repeat(4, 15px);
    background-color: #222;
    border: 1px solid #555;
    margin: 0 auto;
}

#audio-controls {
    position: fixed;
    bottom: 20px;
    left: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 1000;
}

.audio-btn {
    background-color: #444;
    color: white;
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.4);
    transition: background-color 0.2s;
}

.audio-btn:hover {
    background-color: #666;
}