UI refinements (#2859)

## Description:

UI Refinements requested by @evanpelle  check https://ui.openfront.dev

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

w.o.n

src/client/LanguageModal.ts

@@ -32,7 +32,7 @@ export class LanguageModal extends BaseModal {
       <div
         class="h-full flex flex-col ${
           this.inline
-            ? "bg-black/40 backdrop-blur-md rounded-2xl border border-white/10 p-6"
+            ? "bg-black/60 backdrop-blur-md rounded-2xl border border-white/10 p-6"
             : "bg-[#232323] text-white"
         }"
       >