body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color: #f0f0f0;
}

#game-container {
    width: 400px;
    height: 600px;
    border: 1px solid #ccc;
    position: relative;
    background-color: #fff;
}

#score-display {
    position: absolute;
    top: 10px;
    left: 10px;
    font-size: 24px;
    font-weight: bold;
}

#block-area {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.block-row {
    display: flex;
    width: 100%;
}

.block {
    width: 25%;
    height: 150px;
    border: 1px solid #ccc;
    box-sizing: border-box;
}

.black-block {
    background-color: #000;
}