body {
    margin: 0;
    padding: 0;
    background: #111;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    font-family: Arial, sans-serif;
    color: #00ffcc;
}

.clock {
    font-size: 60px;
    background: #222;
    padding: 20px 40px;
    border-radius: 10px;
    box-shadow: 0 0 20px #00ffcc;
}