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

#content {
    text-align: center;
}

#retry {
    display: none;
    padding: 10px 20px;
    cursor: pointer;
    margin-top: 20px;
    background-color: #fff;
    color: #000;
    border: none;
    border-radius: 5px;
}

#time-display {
    font-size: 128px;
}