* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --background: #ffffff;
            --foreground: #202124;
            --border: #dadce0;
            --accent: #1f2937;
            --hover: #f8f9fa;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: var(--background);
            color: var(--foreground);
            line-height: 1.6;
            padding: 20px;
            min-height: 100vh;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
        }

        /* Header Section */
        header {
            text-align: center;
            margin-bottom: 24px;
            padding-bottom: 24px;
        }

        h1 {
            font-size: 2.5rem;
            font-weight: 500;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .subtitle {
            font-size: 1.1rem;
            color: #5f6368;
            font-weight: 400;
            margin-bottom: 10px;
        }

        /* Controls */
        .controls {
            display: flex;
            align-items: center;
            gap: 12px;
            justify-content: center;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        button {
            background: var(--accent);
            color: white;
            border: none;
            padding: 10px 24px;
            border-radius: 4px;
            font-size: 0.95rem;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.2s ease;
        }

        button:hover {
            background: #1a1f2e;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
        }

        button:active {
            background: #151a27;
        }

        /* Tables Grid */
        .tables-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
            margin-bottom: 40px;
        }

        .table-card {
            background: var(--background);
            border: 1px solid var(--border);
            border-radius: 8px;
            overflow: hidden;
            transition: all 0.2s ease;
        }

        .table-card:hover {
            border-color: var(--accent);
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
        }

        .table-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 16px 20px;
            border-bottom: 1px solid #0055ff;
            background: var(--hover);
        }

        .table-header h2 {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--foreground);
        }

        .table-header button {
            padding: 6px 14px;
            font-size: 0.85rem;
        }

        .table-content {
            padding: 0;
            overflow-y: auto;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
        }

        table tr {
            display: grid;
            grid-template-columns: 1fr 1fr;
            border-bottom: 1px solid var(--border);
        }

        table tr:last-child {
            border-bottom: none;
        }

        table td {
            padding: 12px 16px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        table td:first-child {
            background: var(--hover);
            font-weight: 500;
            color: var(--accent);
            border-right: 1px solid var(--border);
        }

        table td:last-child {
            justify-content: center;
            font-weight: bold;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            h1 {
                font-size: 1.8rem;
            }

            .tables-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .controls {
                flex-direction: column;
            }
        }

        /* Print Styles */
        @media print {
            body {
                padding: 0;
            }

            .controls {
                display: none;
            }

            .tables-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .table-card {
                page-break-inside: avoid;
                border: 2px solid var(--border);
            }

            header, footer {
                border-bottom: none;
                margin-bottom: 20px;
            }
        }

        /* Accessibility */
        @media (prefers-reduced-motion: reduce) {
            * {
                transition: none !important;
                animation: none !important;
            }
        }