body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.navbar-brand {
    font-weight: bold;
}

.card-title {
    color: #333;
}

.qr-code-container img {
    max-width: 250px;
    border: 1px solid #ddd;
    padding: 10px;
    border-radius: 8px;
}