body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background-color: #0a1a3b;
    color: #fff;
}
header {
    text-align: center;
    padding: 2rem;
    background-color: #0a1a3b;
}
.logo {
    width: 160px;
    display: block;
    margin: 0 auto 1rem;
}
section {
    padding: 2rem;
}
ul {
    list-style: none;
    padding: 0;
}
input, textarea, button {
    display: block;
    width: 100%;
    margin: 0.5rem 0;
    padding: 1rem;
    font-size: 1rem;
}
button {
    background-color: #f0c040;
    color: #000;
    border: none;
    cursor: pointer;
}
.whatsapp {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #25d366;
    color: white;
    padding: 1rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
}