Modernize Internal HR App Interface

Title: Redesign my existing website — make it modern (≈90 pages) Description: I have a working website (an internal company HR app, built with ASP.NET Core / Bootstrap 5). Everything works fine — I just want it to look modern and clean instead of plain/old... (Budget: €30 - €250 EUR, Jobs: .NET Core, ASP.NET MVC, Bootstrap, CSS, HTML, JavaScript)