body {
    background-color: #111;
    font-family: 'Segoe UI', sans-serif;
    color: white;
    text-align: center;
    padding: 2rem;
}
.logo {
    max-width: 200px;
    margin-bottom: 2rem;
}
form {
    margin-bottom: 2rem;
}
input[type="text"] {
    padding: 10px;
    border: none;
    border-radius: 5px;
    width: 250px;
    font-size: 1rem;
}
button {
    background-color: #25D366;
    color: white;
    padding: 10px 20px;
    font-size: 1rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}
.qr-code {
    margin-top: 2rem;
}