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static/css/variables.css

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+/* CSS Variables for theming */
+:root {
+    /* Light mode colors */
+    --bg-primary: #ffffff;
+    --bg-secondary: #f6f8fa;
+    --bg-tertiary: #f0f0f0;
+    --text-primary: #24292f;
+    --text-secondary: #57606a;
+    --border-color: #d0d7de;
+    --link-color: #0969da;
+    --success-color: #2da44e;
+    --danger-color: #cf222e;
+    --warning-color: #bf8700;
+    --info-color: #0969da;
+}
+
+body.dark-mode {
+    /* Dark mode colors - GitHub style */
+    --bg-primary: #0d1117;
+    --bg-secondary: #161b22;
+    --bg-tertiary: #1c2128;
+    --text-primary: #e6edf3;
+    --text-secondary: #8d96a0;
+    --border-color: #30363d;
+    --link-color: #4fc3f7;
+    --success-color: #3fb950;
+    --danger-color: #f85149;
+    --warning-color: #d29922;
+    --info-color: #58a6ff;
+}
+