body {
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #34e5f9, #3b54de);
    color: #fff;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    text-align: center;
}

.header-container {
    margin-top: 120px;
}

.header-container h1 {
    font-size: 3rem;
    font-weight: bold;
}

.header-container p {
    font-size: 1.1rem;
    margin-top: 10px;
    opacity: 0.9;
}

.container {
    margin-top: 60px;
}

button {
    padding: 10px 24px;
    font-size: 1.1rem;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    background: white;
    color: #3b54de;
    font-weight: 600;
}

button:hover {
    background: #f0f0f0;
}

#date-display {
    font-size: 2rem;
    margin-bottom: 20px;
    min-height: 50px;
}

.back-link {
    margin-top: auto;
    margin-bottom: 20px;
}

.back-link a {
    color: #fff;
    text-decoration: none;
    opacity: 0.8;
}

.back-link a:hover {
    opacity: 1;
}

footer {
    background: rgba(255, 255, 255, 0.1);
    padding: 10px;
    font-size: 0.9rem;
}