This is a shamefully non-responsive web page design for a company that builds mobile apps. The sidebar is set to cover the main text even with my page width set

This is a shamefully non-responsive web page design for a company that builds mobile apps. The sidebar is set to cover the main text even with my page width set to almost 1000 px wide. Even worse, the sidebar is a fixed position and on top element that I can't scroll away from or out from under. I expect better web design from the team behind Threes, which I bought and liked.