Update main.py

main.py

@@ -315,11 +315,39 @@ def proxy(path):
             style_tag = soup.new_tag('style')
             style_tag.string = '''
                 :root {
+                    /* Light theme (default) */
                     --primary-gradient: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
                     --hover-gradient: linear-gradient(135deg, #2980b9 0%, #2471a3 100%);
                     --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #e4e9f2 100%);
                     --card-shadow: 0 8px 20px rgba(0,0,0,0.08);
                     --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
+                    --text-color: #2c3e50;
+                    --card-bg: rgba(255, 255, 255, 0.98);
+                    --card-border: rgba(255, 255, 255, 0.8);
+                    --table-border: rgba(236, 240, 241, 0.8);
+                    --table-row-even: rgba(245, 247, 250, 0.5);
+                    --modal-bg: rgba(0, 0, 0, 0.9);
+                    --modal-text: #f1f1f1;
+                    --zoom-btn-bg: rgba(255, 255, 255, 0.2);
+                    --zoom-btn-border: rgba(255, 255, 255, 0.4);
+                    --zoom-btn-color: white;
+                }
+                
+                [data-theme="dark"] {
+                    --primary-gradient: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
+                    --hover-gradient: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
+                    --bg-gradient: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
+                    --card-shadow: 0 8px 20px rgba(0,0,0,0.2);
+                    --text-color: #e2e8f0;
+                    --card-bg: rgba(30, 41, 59, 0.98);
+                    --card-border: rgba(30, 41, 59, 0.8);
+                    --table-border: rgba(51, 65, 85, 0.8);
+                    --table-row-even: rgba(30, 41, 59, 0.5);
+                    --modal-bg: rgba(0, 0, 0, 0.95);
+                    --modal-text: #f1f1f1;
+                    --zoom-btn-bg: rgba(30, 41, 59, 0.4);
+                    --zoom-btn-border: rgba(51, 65, 85, 0.6);
+                    --zoom-btn-color: #e2e8f0;
                 }
                 body { 
                     font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;