/* Custom styles */
.card {
    border: none;
    margin-bottom: 1.5rem;
}

.card-header {
    border-bottom: none;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.btn {
    padding: 0.5rem 1rem;
    font-weight: 500;
}

.btn-light {
    background-color: #fff;
    border-color: #fff;
    color: #0d6efd;
}

.btn-light:hover {
    background-color: #f8f9fa;
    border-color: #f8f9fa;
    color: #0a58ca;
}

.alert {
    border: none;
    border-radius: 0.5rem;
}

.form-control:focus {
    box-shadow: 0 0 0 0.25rem rgba(13,110,253,0.15);
}

.is-invalid {
    border-color: #dc3545;
}

.is-invalid:focus {
    box-shadow: 0 0 0 0.25rem rgba(220,53,69,0.15);
}

/* QR Code card styles */
.qr-card {
    transition: transform 0.2s;
}

.qr-card:hover {
    transform: translateY(-5px);
}

.qr-card img {
    max-width: 200px;
    margin: 0 auto;
    display: block;
}