diff --git a/controller/cuda_grid_controller/browser_overlays.py b/controller/cuda_grid_controller/browser_overlays.py
index b6008a2..9497677 100644
--- a/controller/cuda_grid_controller/browser_overlays.py
+++ b/controller/cuda_grid_controller/browser_overlays.py
@@ -202,6 +202,11 @@ class BrowserRenderer:
                 img = Image.open(io.BytesIO(screenshot_bytes))
                 if img.mode != "RGBA":
                     img = img.convert("RGBA")
+                # Resize к target w_px×h_px — overlay поместится exactly в configured slot.
+                # Без resize element скриншот возвращается в native dims (e.g. 790×258 для
+                # Grafana panel) → overflow / gap в slot. LANCZOS = high-quality downscale.
+                if img.size != (cfg.w_px, cfg.h_px):
+                    img = img.resize((cfg.w_px, cfg.h_px), Image.LANCZOS)
                 path = self.icon_dir / f"{cfg.id}.png"
                 tmp = path.with_suffix(".png.tmp")
                 img.save(tmp, "PNG")