body {
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f0f0f0;
}

#game-container {
    display: flex;
    border: 2px solid #333;
}

#game-board {
    border: 2px solid #333;
    background-color: #000;
}

#ui-container {
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

button {
    margin-top: 10px;
    padding: 10px 20px;
    cursor: pointer;
}

#next-piece {
    border: 1px solid #ccc;
    background-color: #f9f9f9;
}