.container {
            max-width: 1400px;
            margin: 0 auto;
        }

        h1 {
            text-align: center;
            color: white;
            margin-bottom: 30px;
            font-size: 2.5em;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        }

        .main-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .panel {
            background: white;
            border-radius: 12px;
            padding: 25px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
        }

        .full-width {
            grid-column: 1 / -1;
        }

        h2 {
            color: #667eea;
            margin-bottom: 20px;
            font-size: 1.4em;
            border-bottom: 3px solid #667eea;
            padding-bottom: 10px;
        }

        h3 {
            color: #764ba2;
            margin: 20px 0 15px 0;
            font-size: 1.1em;
        }

        .info-box {
            background: #e3f2fd;
            border-left: 4px solid #2196f3;
            padding: 12px;
            margin-bottom: 15px;
            border-radius: 4px;
            font-size: 13px;
            color: #1565c0;
        }

        .file-input-wrapper {
            margin-bottom: 20px;
        }

        .file-input-label {
            display: inline-block;
            padding: 12px 30px;
            background: #667eea;
            color: white;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.3s;
            font-weight: 600;
        }

        .file-input-label:hover {
            background: #5568d3;
        }

        input[type="file"] {
            display: none;
        }

        .file-name {
            display: inline-block;
            margin-left: 15px;
            color: #666;
        }

        .style-options {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-bottom: 15px;
        }

        .style-option {
            display: flex;
            flex-direction: column;
            gap: 5px;
        }

        .style-option label {
            font-size: 13px;
            font-weight: 600;
            color: #333;
        }

        .style-option select,
        .style-option input {
            padding: 10px;
            border: 2px solid #e0e0e0;
            border-radius: 4px;
            font-size: 13px;
        }

        .checkbox-group {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 15px;
        }

        .checkbox-group input[type="checkbox"] {
            width: 18px;
            height: 18px;
            cursor: pointer;
        }

        .checkbox-group label {
            margin: 0;
            font-weight: normal;
            cursor: pointer;
            font-size: 14px;
        }

        button {
            padding: 12px 25px;
            background: #667eea;
            color: white;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s;
        }

        button:hover {
            background: #5568d3;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }

        button.secondary {
            background: #764ba2;
        }

        button.secondary:hover {
            background: #653a8a;
        }

        .preview-container {
            border: 2px solid #e0e0e0;
            border-radius: 6px;
            padding: 20px;
            background: #f8f9fa;
            overflow-x: auto;
            min-height: 300px;
        }

        .code-output {
            background: #1e1e1e;
            color: #d4d4d4;
            padding: 20px;
            border-radius: 6px;
            font-family: 'Courier New', monospace;
            font-size: 13px;
            line-height: 1.6;
            overflow-x: auto;
            white-space: pre;
            max-height: 500px;
            overflow-y: auto;
        }

        .button-group {
            display: flex;
            gap: 10px;
            margin-top: 15px;
            flex-wrap: wrap;
        }

        .success-message {
            background: #e8f5e9;
            color: #2e7d32;
            padding: 12px;
            border-radius: 6px;
            margin-top: 10px;
            text-align: center;
            font-weight: 600;
        }

        /* Table Styles */
        table {
            width: 100%;
            border-collapse: collapse;
            background: white;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }

        table th,
        table td {
            padding: 12px;
            text-align: left;
            border: 1px solid #ddd;
        }

        table th {
            background: #667eea;
            color: white;
            font-weight: 600;
        }

        table tr:nth-child(even) {
            background: #f8f9fa;
        }

        table tr:hover {
            background: #e3f2fd;
        }

        /* Style variations */
        .style-minimal table {
            border: none;
        }

        .style-minimal th,
        .style-minimal td {
            border: none;
            border-bottom: 1px solid #ddd;
        }

        .style-bordered table {
            border: 2px solid #667eea;
        }

        .style-bordered th,
        .style-bordered td {
            border: 1px solid #667eea;
        }

        .style-striped tr:nth-child(odd) {
            background: white;
        }

        .style-striped tr:nth-child(even) {
            background: #f0f0f0;
        }

        .style-compact th,
        .style-compact td {
            padding: 6px 10px;
            font-size: 13px;
        }

        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }

            .style-options {
                grid-template-columns: 1fr;
            }
        }