body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #9ab0ff, #c4f2fa);
    font-family: Arial, sans-serif;
    text-align: center;
    color: #333;
}
.container {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}
h1 {
    font-size: 2em;
}
#countdown {
    font-size: 1.5em;
    margin-top: 10px;
    font-weight: bold;
}