body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, sans-serif;
    background: linear-gradient(135deg, #ffcc33, #ff9933);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    background: #ffffff;
    padding: 30px;
    max-width: 500px;
    text-align: center;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

h1 {
    color: #ff6600;
    margin-bottom: 10px;
}

.subtitle {
    color: #555;
    margin-bottom: 25px;
    font-size: 16px;
}

.card {
    background: #fff7e6;
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
}

.card p {
    font-size: 16px;
    color: #333;
}

button {
    margin-top: 15px;
    padding: 10px 20px;
    background: #ff6600;
    border: none;
    color: #fff;
    font-size: 15px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #e65c00;
}

#wishMessage {
    font-size: 18px;
    color: #2e7d32;
    margin-top: 15px;
    font-weight: bold;
}

.hidden {
    display: none;
}

footer {
    margin-top: 25px;
    font-size: 13px;
    color: #777;
}