Update app.py

app.py

@@ -785,7 +785,7 @@ def _render_header_html(auto: bool, px: int, scale: float) -> str:
   const AUTO = {auto_js};
   const PX = {int(px)};
   const SCALE = {float(scale)};
-  const MIN = 80, MAX = 720;  // hard clamps
+  const MIN = 60, MAX = 100;  // hard clamps
 
   function outerH(el) {{
     if (!el) return 0;