Update app.py

app.py

@@ -31,8 +31,10 @@ def generate_html_snippet(image_path_prefix):
     srcset_items = [f"{image_path_prefix}-{w}x{h}.jpg {w}w" for w, h in SIZES]
     srcset_str = ",\n        ".join(srcset_items)
     
-    # Using min-width for better responsive behavior
-    sizes_str = "(min-width: 1000px) 45vw, (min-width: 780px) 696px, (min-width: 580px) 480px, calc(100vw - 60px)"
+    sizes_items = [
+        f"(max-width: {w}px) {w}px" for w, _ in SIZES[:-1]
+    ] + [f"{SIZES[-1][0]}px"]
+    sizes_str = ",\n        ".join(sizes_items)
     
     # Use the middle size as default src
     default_size = SIZES[4]  # 1280x1128