[Hiring] Help edit basic theme to be responsive for wide width

What would you like done?
I need help with custom CSS or otherwise customizing my forum hosted on DigitalOcean so that the site will expand to utilize the full width on windows larger than the current maximum, i.e. on a 4K monitor the menus and posts should expand when I enlarge a window and/or use a 4K or larger monitor. This should work with Standard Discourse functions and also with static pages created using the Procourse static pages plugin.

When do you need it done?
Within about a week

What is your budget, in $ USD that you can offer for this task?

Never mind

Problem solved by a helpful staff member very elegantly - Thanks Rafael