fix: contrast issues

src/main/frontend/components/header.css

@@ -46,7 +46,7 @@
     display: flex;
     align-items: center;
     justify-content: center;
-    opacity: .5;
+    opacity: .8;
 
     .ti {
       font-size: 20px;

src/main/frontend/components/reference.cljs

@@ -127,7 +127,7 @@
         *collapsed? (atom nil)]
     (ui/foldable
      [:div.flex.flex-row.flex-1.justify-between.items-center
-      [:h2.font-bold.opacity-50 (str
+      [:h2.font-bold.opacity-80 (str
                                  (when (seq filters)
                                    (str filter-n " of "))
                                  total