Float on CSS, clearfix?

Question

css

Good afternoon, I can’t master clearfix either, it doesn’t work. Here is an example , you need to put nav_top on top of all to the very top on the right, I thought about display: flex, but they are not supported everywhere like. What to do?

Answer 1

Let's start by reformulating your question. Because your .nav_top in your example is already "on top".
Manual on the clear property.