body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    font-family: Arial, sans-serif;
    text-align: center;
    margin: 0;
}

.container {
    background: rgba(0, 0, 0, 0.2);
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

h1 {
    font-size: 2em;
    margin-bottom: 10px;
}

.countdown {
    font-size: 1.5em;
    font-weight: bold;
}