body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 600px;
    margin: 50px auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

h1, h2 {
    text-align: center;
    color: #007BFF;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 15px;
}

.form-group label {
    font-weight: bold;
    margin-bottom: 5px;
}

.form-group input {
    padding: 10px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    color: #fff;
    background-color: #007BFF;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.qr-code-container {
    text-align: center;
    margin-top: 20px;
}

.qr-code-wrapper {
    background-color: #00274d;
    padding: 20px;
    display: inline-block;
    border-radius: 8px;
}

.qr-code {
    width: 200px;
    height: 200px;
    margin-top: 10px;
}

.counter {
    font-size: 18px;
    color: #ff0000;
    margin-top: 10px;
}

.status-message {
    font-size: 18px;
    color: #007BFF;
    margin-top: 10px;
}

.instance-data-container {
    margin-top: 20px;
}

.instance-data-container input[readonly] {
    background-color: #e9ecef;
    color: #495057;
    cursor: not-allowed;
}

.info {
    text-align: center;
    margin-top: 20px;
}

.info div {
    margin: 5px 0;
}