body {
    background-color: #1e1e1e;
    color: #ffffff;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}
.container {
    max-width: 400px;
    margin: 50px auto;
    padding: 20px;
    background-color: #2c2c2c;
    border-radius: 8px;
}
h1 {
    text-align: center;
    color: #00ff66;
}
.subtitle {
    text-align: center;
    margin-bottom: 20px;
}
form label {
    display: block;
    margin-top: 10px;
}
form input, form select, form button {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    margin-bottom: 15px;
    border: none;
    border-radius: 4px;
}
form button {
    background-color: #ffc107;
    color: #000;
    font-weight: bold;
    cursor: pointer;
}
form button:hover {
    background-color: #e0a800;
}
.qr-code {
    display: block;
    margin: 20px auto;
    max-width: 200px;
}
.status {
    text-align: center;
    color: yellow;
    font-weight: bold;
}