feat(web): change sidenav style according to design

Author: Manuel Proß

web/src/components/Layout/Layout.tsx

@@ -8,9 +8,9 @@ type LayoutProps = {
 
 export default function Layout({ children, pages }: PropsWithChildren<LayoutProps>) {
 	return (
-		<div className="bg-slate-700">
+		<div className="py-4 pr-4">
 			<Navigation menu={pages} />
-			<div className="ml-52">
+			<div className="rounded-3xl ml-[15rem] bg-gray-5">
 				{children}
 				<Footer />
 			</div>