various small fixes

- light theme footer css
- fixed l/r overlay css
- fixed discolored generics
- fixed scroll margin
- elements selected by url now display as hovered
- fixed top padding in mobile layout
- fixed padding for import string on type pages
- fixed padding on module listing pages
- fixed link clickable areas on left nav

src/styles/docs/docs.css

@@ -40,6 +40,7 @@
 
 .c-breadcrumbs {
   --color-link-breadcrumbs: hsl(var(--accent-600));
+  margin-top: 0.5rem;
   margin-bottom: 0.318rem;
   max-width: 100svw;
 }