diff --git a/aocsync.py b/aocsync.py
index 0f70dee..efe6605 100755
--- a/aocsync.py
+++ b/aocsync.py
@@ -931,8 +931,9 @@ class HTMLGenerator:
         if len(data_points) < 2:
             return ""
         
-        # Graph dimensions
-        width = 600
+        # Graph dimensions - make responsive to fit in modal
+        # Modal has max-width 600px with 20px padding, so max SVG width should be ~560px
+        width = 560
         height = 200
         padding = 40
         graph_width = width - 2 * padding
@@ -961,9 +962,9 @@ class HTMLGenerator:
             else:
                 return f"{ns}ns"
         
-        # Generate SVG
+        # Generate SVG - make it responsive
         svg_parts = []
-        svg_parts.append(f'<svg width="{width}" height="{height}" style="border: 1px solid #ddd; background: #fafafa;">')
+        svg_parts.append(f'<svg width="100%" height="{height}" viewBox="0 0 {width} {height}" preserveAspectRatio="xMidYMid meet" style="border: 1px solid #ddd; background: #fafafa; max-width: 100%;">')
         
         # Draw axes
         svg_parts.append(f'<line x1="{padding}" y1="{padding}" x2="{padding}" y2="{height - padding}" stroke="#333" stroke-width="2"/>')  # Y-axis
@@ -1387,6 +1388,15 @@ class HTMLGenerator:
             padding: 10px;
             background: white;
             border-radius: 4px;
+            overflow-x: auto;
+            overflow-y: visible;
+        }}
+        
+        .history-graph svg {{
+            display: block;
+            width: 100%;
+            max-width: 100%;
+            height: auto;
         }}
         
         .compact-commits {{