fix: highlight color on dark mode (#1458)

Author: dgarcia360

sphinx_scylladb_theme/static/css/main.css

@@ -160,6 +160,10 @@ cite {
 }
 
 .dark {
+  .highlight .hll {
+    background-color: var(--gray-950);
+    color: var(--white);
+  }
 
   .highlight .c { color: #6272a4;} /* Comment */
   .highlight .err { color: #f8f8f2;} /* Error */

src/css/base/_reset.scss

@@ -36,6 +36,7 @@
     font-size: 0px;
     padding: 8px 8px;
     cursor: pointer;
+    flex-shrink: 0;
 
     i {
       font-size: 26px;