body {
    background: #f4f4f4;
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
}

.container {
    max-width: 450px;
    margin: 100px auto;
    background: white;
    padding: 40px;
    border-radius: 14px;
    text-align: center;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

h1 {
    color: #222;
    margin-bottom: 10px;
}

p {
    color: #555;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.whatsapp-btn {
    display: block;
    background: #25D366;
    color: white;
    padding: 14px;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 10px;
    text-decoration: none;
    margin-bottom: 20px;
    transition: 0.2s;
}

.whatsapp-btn:hover {
    background: #1eb954;
}

.footer {
    font-size: 0.9rem;
    color: #888;
}