body {
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

.game-container {
    display: flex;
    align-items: flex-start;
    border: 3px solid #333;
    padding: 10px;
    background-color: #fff;
}

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

.side-panel {
    margin-left: 20px;
    text-align: center;
}

#next-mino {
    border: 2px solid #333;
    background-color: #000;
}

button {
    margin-top: 20px;
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
}