.csv-preview {
            background: #ffffff;
            border: 1px solid #dee2e6;
            border-radius: 6px;
            padding: 1rem;
            margin: 1.5rem 0;
            max-height: 350px;
            overflow: auto;
        }
        .csv-preview table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
        }
        .csv-preview th {
            background-color: #f8f9fa;
            font-weight: 600;
            border: 1px solid #dee2e6;
            padding: 0.5rem;
        }
        .csv-preview td {
            border: 1px solid #dee2e6;
            padding: 0.5rem;
        }
        .html-output {
            background-color: #f4f6f9;
            border: 1px solid #ced4da;
            border-radius: 6px;
            padding: 0.75rem;
            font-family: 'Courier New', Courier, monospace;
            font-size: 0.85rem;
            white-space: pre-wrap;
            word-wrap: break-word;
            max-height: 200px;
            overflow: auto;
        }
        .option-group {
            background: #f8f9fa;
            border-radius: 8px;
            padding: 1rem;
            margin: 1rem 0;
        }
        .delimiter-radio {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
        }
        .stats-badge {
            background-color: #e9ecef;
            border-radius: 20px;
            padding: 0.25rem 1rem;
            font-size: 0.9rem;
            display: inline-block;
            margin-right: 0.5rem;
        }
        .example-btn {
            background-color: rgba(70, 130, 180, 0.1);
            border: 1px solid rgba(70, 130, 180, 0.2);
            border-radius: 4px;
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            color: var(--primary-color);
            cursor: pointer;
            transition: all 0.2s;
            font-family: 'Courier New', monospace;
        }
        .example-btn:hover {
            background-color: rgba(70, 130, 180, 0.2);
            transform: translateY(-2px);
        }
        .privacy-note {
            font-size: 0.9rem;
            background-color: #e7f3ff;
            border: 1px solid #b8daff;
            color: #004085;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            margin: 1rem 0;
        }
        .author-bio {
            background-color: #f8f9fa;
            border-left: 4px solid var(--primary-color);
            padding: 1.2rem;
            margin: 2rem 0;
            border-radius: 0 8px 8px 0;
        }
        /* Tab customizations */
        .nav-tabs .nav-link {
            font-weight: 500;
            color: #495057;
        }
        .nav-tabs .nav-link.active {
            color: var(--primary-color);
            border-bottom-color: var(--primary-color);
        }
        .upload-area {
            padding: 1rem 0;
        }
        .file-input-group {
            display: flex;
            gap: 1rem;
            align-items: center;
            flex-wrap: wrap;
        }
        .btn-outline-success {
            border-color: #28a745;
            color: #28a745;
        }
        .btn-outline-success:hover {
            background-color: #28a745;
            color: #fff;
        }