body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: #333;
            max-width: 800px;
            margin: 0 auto;
            padding: 20px;
            background-color: rgb(255, 255, 255);
        }

        h1 {
            color: #2c3e50;
            text-align: center;
            border-bottom: 1px solid #eee;
            padding-bottom: 10px;
            font-size: 1.8em;
        }

        h2 {
            color: #3498db;
            border-left: 3px solid #3498db;
            padding-left: 10px;
            margin-top: 25px;
            font-size: 1.3em;
        }

        .code-block {
            background-color: #f8f9fa;
            color: #333;
            padding: 12px;
            border-radius: 4px;
            border: 1px solid #e9ecef;
            font-family: 'Courier New', Courier, monospace;
            font-size: 0.9em;
            overflow-x: auto;
            margin: 10px 0;
        }

        .keyword {
            color: #d63384;
            font-weight: bold;
        }

        .string {
            color: #20c997;
        }

        .comment {
            color: #6c757d;
            font-style: italic;
        }

        .highlight {
            background-color: #fff3cd;
            padding: 2px 4px;
            border-radius: 3px;
            font-size: 0.9em;
        }

        .note {
            background-color: #e7f5ff;
            padding: 12px;
            border-left: 3px solid #3498db;
            margin: 15px 0;
            border-radius: 0 4px 4px 0;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            margin: 15px 0;
            font-size: 0.95em;
        }

        th {
            background-color: #f8f9fa;
            color: #3498db;
            padding: 10px;
            text-align: left;
            border-bottom: 1px solid #dee2e6;
        }

        td {
            padding: 10px;
            border-bottom: 1px solid #f1f3f4;
        }

        @media print {
            body {
                font-size: 0.9em;
            }
            .code-block {
                background-color: white;
                border: none;
            }
        }
.operator { color: red; font-weight: bold; }
        .number { color: purple; }