body {
    margin: 0;
    overflow: hidden;
    background-color: #00ccff;
}

#game-container {
    width: 320px;
    height: 580px;
    margin: 0 auto;
    background-color: #1371ff;
    position: relative;
}

#score {
    color: #FFF;
    font-size: 24px;
    position: absolute;
}

.tile {
    width: 80px;
    height: 130px;
    background-color: #333;
    position: absolute;
    cursor: pointer;
    animation: moveDown 2s linear forwards;
}

@keyframes moveDown {
    from {
        transform: translateY(0);
    }
    to {
        transform: translateY(450px); /* タイルを下に移動 */
    }
}
