#clock {
    font-family: 'Arial', sans-serif;
    font-size: 50px;
    font-weight: bold;
    color: #fff;
    background: #222;
    padding: 20px;
    border-radius: 10px;
    display: inline-block;
    text-align: center;
    box-shadow: 0px 4px 10px rgba(0, 0, 0, 0.5);
}