<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>DOM Graph Visualization</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'SF Mono', Monaco, monospace;
            background: #1e1e1e;
            color: #d4d4d4;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        
        .header {
            background: #2d2d2d;
            padding: 16px 24px;
            border-bottom: 1px solid #3e3e3e;
            box-shadow: 0 2px 8px rgba(0,0,0,0.3);
        }
        
        .header h1 {
            font-size: 20px;
            font-weight: 600;
            color: #4ec9b0;
            margin-bottom: 8px;
        }
        
        .header .info {
            font-size: 13px;
            color: #858585;
            font-family: 'SF Mono', Monaco, monospace;
        }
        
        .container {
            flex: 1;
            padding: 24px;
            overflow: auto;
        }
        
        .graph-wrapper {
            background: white;
            border-radius: 8px;
            padding: 24px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.4);
            display: inline-block;
            min-width: 100%;
        }
        
        .graph-wrapper svg {
            max-width: 100%;
            height: auto;
        }
        
        .dot-content {
            background: #2d2d2d;
            border: 1px solid #3e3e3e;
            border-radius: 8px;
            padding: 20px;
            font-family: 'SF Mono', Monaco, 'Courier New', monospace;
            font-size: 13px;
            line-height: 1.6;
            overflow-x: auto;
            color: #d4d4d4;
            white-space: pre;
        }
        
        .dot-content::before {
            content: "DOT Graph Definition:";
            display: block;
            color: #4ec9b0;
            font-weight: 600;
            margin-bottom: 16px;
            font-size: 14px;
        }
        
        .error {
            background: #f14c4c;
            color: white;
            padding: 16px 24px;
            border-radius: 8px;
            margin: 24px;
            font-size: 14px;
            box-shadow: 0 4px 12px rgba(241, 76, 76, 0.3);
        }
        
        .error::before {
            content: "⚠ ";
            font-size: 18px;
        }
        
        .install-note {
            background: #0e639c;
            color: white;
            padding: 16px 24px;
            border-radius: 8px;
            margin: 24px;
            font-size: 14px;
            line-height: 1.6;
            box-shadow: 0 4px 12px rgba(14, 99, 156, 0.3);
        }
        
        .install-note strong {
            display: block;
            margin-bottom: 8px;
            font-size: 15px;
        }
        
        .install-note code {
            background: rgba(255,255,255,0.1);
            padding: 2px 6px;
            border-radius: 3px;
            font-family: 'SF Mono', Monaco, monospace;
            font-size: 13px;
        }
        
        .legend {
            background: #2d2d2d;
            border: 1px solid #3e3e3e;
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 24px;
        }
        
        .legend h3 {
            color: #4ec9b0;
            font-size: 16px;
            margin-bottom: 16px;
        }
        
        .legend-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 12px;
        }
        
        .legend-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
        }
        
        .legend-color {
            width: 32px;
            height: 24px;
            border-radius: 4px;
            border: 1px solid #555;
        }
        
        .footer {
            background: #2d2d2d;
            padding: 12px 24px;
            border-top: 1px solid #3e3e3e;
            text-align: center;
            font-size: 12px;
            color: #858585;
        }
    </style>
</head>
<body>
    <div class="header">
        <h1>🌳 DOM Tree Visualization</h1>
        {% if graph_path %}
        <div class="info">Source: {{ graph_path }}</div>
        {% endif %}
    </div>
    
    <div class="container">
        {% if error %}
        <div class="error">
            {{ error }}
        </div>
        {% elif is_svg %}
        <div class="legend">
            <h3>Color Legend</h3>
            <div class="legend-grid">
                <div class="legend-item">
                    <div class="legend-color" style="background: lightgreen;"></div>
                    <span>&lt;html&gt;, &lt;body&gt;</span>
                </div>
                <div class="legend-item">
                    <div class="legend-color" style="background: lightyellow;"></div>
                    <span>Headings (h1-h6)</span>
                </div>
                <div class="legend-item">
                    <div class="legend-color" style="background: lightgray;"></div>
                    <span>Block elements</span>
                </div>
                <div class="legend-item">
                    <div class="legend-color" style="background: lightcyan;"></div>
                    <span>Lists (ul, ol, li)</span>
                </div>
                <div class="legend-item">
                    <div class="legend-color" style="background: lightpink;"></div>
                    <span>Interactive (a, button)</span>
                </div>
                <div class="legend-item">
                    <div class="legend-color" style="background: lightblue;"></div>
                    <span>Text nodes</span>
                </div>
            </div>
        </div>
        
        <div class="graph-wrapper">
            {{ graph_content|safe }}
        </div>
        {% else %}
        <div class="install-note">
            <strong>📦 Graphviz not installed</strong>
            Showing DOT format instead. For visual graphs, install Graphviz:
            <br><br>
            <code>sudo apt install graphviz</code>
        </div>
        
        <div class="dot-content">{{ graph_content }}</div>
        {% endif %}
    </div>
    
    <div class="footer">
        Bowser Browser • DOM Graph Visualization • Press Ctrl+Shift+D to regenerate
    </div>
</body>
</html>
