body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background: #f2f2f2;
}
.container {
    max-width: 400px;
    margin: 30px auto;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 24px 18px 32px 18px;
    text-align: center;
}
input[type="text"] {
    width: 90%;
    padding: 10px;
    margin-bottom: 12px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1.1em;
}
button {
    padding: 12px 24px;
    margin: 10px 0;
    font-size: 1.1em;
    border: none;
    border-radius: 5px;
    background: #007bff;
    color: #fff;
    cursor: pointer;
    transition: background 0.2s;
}
button:disabled {
    background: #aaa;
    cursor: not-allowed;
}
#camera {
    width: 100%;
    max-width: 350px;
    border-radius: 8px;
    margin-bottom: 10px;
}
#preview {
    width: 100%;
    max-width: 350px;
    border-radius: 8px;
    margin-bottom: 10px;
}
#result {
    margin-top: 10px;
    color: #007bff;
    font-weight: bold;
}