What is the best way to optimize the menu for phones?

Question

css

Tell me how best to build it, it looks bulky and ugly from the phone. Can you give good advice?

The menu is standard, through ul and li

Thank you!

Answer 1

as usual - a square in the upper corner, clicked - popped up) Look at one of my projects on the phone https://goo.gl/yzXzLP

Answer 2

regular hamburger

Answer 3

Thanks for answers. I chose the solution of the problem through slideout