body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            max-width: 900px;
            margin: 40px auto;
            padding: 20px;
            background-color: #f9f9f9;
            color: #333;
        }
        h1, h2, h3, h4 {
            color: #2c3e50;
        }
        pre {
            background: #f4f4f4;
            border: 1px solid #ddd;
            border-radius: 6px;
            padding: 15px;
            overflow-x: auto;
            font-size: 14px;
        }
        code {
            font-family: Consolas, Monaco, 'Courier New', monospace;
        }
        table {
            border-collapse: collapse;
            width: 100%;
            margin: 20px 0;
        }
        th, td {
            border: 1px solid #ddd;
            padding: 10px;
            text-align: left;
        }
        th {
            background-color: #f0f0f0;
        }
        .note {
            background-color: #e7f3fe;
            border-left: 6px solid #2196F3;
            padding: 10px;
            margin: 15px 0;
        }
        hr {
            border: 0;
            border-top: 2px solid #eee;
            margin: 40px 0;
        }
        ul { list-style-type: disc; margin-left: 20px; }