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

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.card {
    box-shadow: 0 2px 8px rgba(0,0,0,.1);
    border: none;
    margin-bottom: 20px;
}

.card-header {
    font-weight: 600;
}

.result-card {
    border-left: 4px solid #0d6efd;
}

.result-card.success {
    border-left-color: #198754;
}

.result-card.error {
    border-left-color: #dc3545;
}

.json-viewer {
    background-color: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 4px;
    padding: 15px;
    max-height: 400px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 13px;
}

.btn-download {
    margin-top: 10px;
}

#status-badge {
    font-size: 0.9rem;
}

.nav-tabs .nav-link {
    color: #495057;
}

.nav-tabs .nav-link.active {
    font-weight: 600;
}

pre {
    white-space: pre-wrap;
    word-wrap: break-word;
}