.qr-generator-container {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

.qr-generator-form {
    flex: 1;
    min-width: 300px;
    padding: 1.5rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.qr-generator-preview {
    flex: 1;
    min-width: 300px;
    padding: 1.5rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #333;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
}

.form-control:focus-visible {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background-color: #007bff;
    color: #fff;
}

.btn-primary:hover {
    background-color: #0056b3;
}

.btn-success {
    background-color: #28a745;
    color: #fff;
}

.btn-success:hover {
    background-color: #218838;
}

#qr-preview {
    margin-top: 1rem;
}

#qr-preview img {
    max-width: 100%;
    height: auto;
    margin: 1rem 0;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #007bff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#loading {
    margin: 2rem 0;
}

#loading p {
    margin-top: 1rem;
    color: #666;
}

#error {
    color: #dc3545;
    margin: 1rem 0;
    padding: 1rem;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    border-radius: 4px;
}

.size-value {
    display: inline-block;
    margin-left: 0.5rem;
    color: #666;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

#qr-preview {
    animation: fadeIn 0.3s ease-in-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    .qr-generator-container {
        flex-direction: column;
    }
    
    .qr-generator-form,
    .qr-generator-preview {
        width: 100%;
    }
    
    .form-control {
        font-size: 16px; /* Prevent zoom on mobile */
    }
}

/* Print Styles */
@media print {
    .qr-generator-form,
    .btn,
    #loading,
    #error {
        display: none !important;
    }
    
    .qr-generator-preview {
        box-shadow: none;
        padding: 0;
    }
    
    #qr-preview {
        display: block !important;
    }
    
    #qr-preview img {
        max-width: 300px;
        margin: 0 auto;
    }
}