body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    box-sizing: border-box;
}

.container {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px;
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

form label {
    display: block;
    text-align: left;
    margin-bottom: 8px;
    color: #555;
    font-weight: bold;
}

form input[type="text"],
form input[type="number"],
form input[type="password"],
form textarea {
    width: calc(100% - 20px);
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

form textarea {
    resize: vertical;
}

form button {
    background-color: #007bff;
    color: white;
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

form button:hover {
    background-color: #0056b3;
}

.hidden {
    display: none;
}

.result {
    margin-top: 20px;
    padding: 15px;
    background-color: #e9f7ef;
    border: 1px solid #d4edda;
    border-radius: 4px;
    color: #155724;
}

.result a {
    color: #007bff;
    text-decoration: none;
    font-weight: bold;
}

.result a:hover {
    text-decoration: underline;
}

.error {
    color: #dc3545;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    padding: 10px;
    border-radius: 4px;
    margin-top: 15px;
}

#qrcode {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}