/* Excel Multi-Sheet Processor - Custom Styles */

body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.card {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: none;
    border-radius: 12px;
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 12px 12px 0 0 !important;
    padding: 2rem;
}

.card-body {
    padding: 2rem;
}

.form-control {
    border-radius: 8px;
    border: 2px solid #e9ecef;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, 0.25);
}

.btn {
    border-radius: 8px;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background-color: #6c757d;
    border: none;
}

.btn-secondary:hover {
    background-color: #545b62;
    transform: translateY(-2px);
}

.alert {
    border-radius: 8px;
    border: none;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
}

.result-container {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid #dee2e6;
    border-radius: 8px;
}

.result-container pre {
    margin: 0;
    max-height: none;
    border: none;
    border-radius: 0;
}

textarea#json_config {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.4;
}

.modal-content {
    border-radius: 12px;
    border: none;
}

.modal-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 12px 12px 0 0;
}

.form-text {
    color: #6c757d;
    font-size: 0.875rem;
}

.form-text a {
    color: #667eea;
    text-decoration: none;
}

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

/* Loading spinner */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .card-header {
        padding: 1.5rem;
    }
    
    .card-body {
        padding: 1.5rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
}

/* JSON validation styles */
.json-valid {
    border-color: #28a745 !important;
}

.json-invalid {
    border-color: #dc3545 !important;
}

.validation-message {
    margin-top: 0.25rem;
    font-size: 0.875rem;
}

.validation-message.valid {
    color: #28a745;
}

.validation-message.invalid {
    color: #dc3545;
}