body {
    background-color: #111;
    color: #fff;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
header {
    background: #000;
    padding: 2rem;
    text-align: center;
}
header h1 {
    color: #a4ff00;
    margin: 0 0 1rem;
}
.services {
    padding: 2rem;
}
.services ul {
    list-style: none;
    padding: 0;
}
.services li {
    padding: 0.5rem 0;
}
footer {
    background: #000;
    text-align: center;
    padding: 1rem;
    color: #888;
}
.whatsapp {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #25D366;
    color: white;
    padding: 1rem;
    border-radius: 50%;
    font-size: 1.5rem;
    text-decoration: none;
}