Refined navbar

- Removed roundedness to the navbar border, this is to stay consistent with the sharp, non-rounded style of the website (we can discuss if you disagree)
- Added a width for the navbar's bottom border
- Changed the navbar's background colour from background to landingCard, which will contrast better with the pages and not blend in with the background like previously

Author: Games4Doritos

client/src/components/main/Navbar.tsx

@@ -25,7 +25,7 @@ export default function Navbar() {
 
   return (
     <>
-      <header className="sticky top-0 z-50 flex h-24 w-full items-center rounded-md border-b border-border/20 bg-background px-20 font-jersey10">
+      <header className="sticky top-0 z-50 flex h-24 w-full items-center border-b-2 border-border/20 border-b-primary bg-landingCard px-20 font-jersey10">
         <div className="flex flex-1 items-center">
           <Link
             href="/"