body {
        font-family: Arial, sans-serif;
        text-align: center;
        margin: 0;
        padding: 0;
        background: #eef;
        overflow: hidden;
    }

    h1 {
        margin-top: 10px;
    }

    #score, #time {
        font-size: 24px;
        margin: 10px;
    }

    #circle {
        width: 80px;
        height: 80px;
        background-color: crimson;
        border-radius: 50%;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        cursor: pointer;
    }

    #startBtn {
        padding: 10px 20px;
        font-size: 18px;
        background-color: green;
        color: white;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        margin-top: 20px;
    }