Fix libraries overlay contrast

Author: tannerlinsley

src/styles/app.css

@@ -1613,17 +1613,19 @@ mark {
    centre, fading to ~60% at the rim so more of the page shows through the edges.
    Matches the mega-menu blur/saturation. */
 .libraries-overlay-glass {
-  background: radial-gradient(
+  background-color: rgb(255 255 255 / 0.4);
+  background-image: radial-gradient(
     ellipse farthest-side at center,
     rgb(255 255 255 / 0.9) 0%,
     rgb(255 255 255 / 0.6) 100%
   );
-  backdrop-filter: blur(40px) saturate(1.5);
   -webkit-backdrop-filter: blur(40px) saturate(1.5);
+  backdrop-filter: blur(40px) saturate(1.5);
 }
 
 .dark .libraries-overlay-glass {
-  background: radial-gradient(
+  background-color: rgb(0 0 0 / 0.4);
+  background-image: radial-gradient(
     ellipse farthest-side at center,
     rgb(0 0 0 / 0.85) 0%,
     rgb(0 0 0 / 0.6) 100%