Incorrect Burger at a small resolution, how to solve it?

Good day!
On the website u0583199.isp.regruhosting.ru/kitchens.html does not work , a Burger at a resolution of less than 999px, it appears but does not close.
Took the menu from this site https://getinstance.info/articles/css/responsive-menu/

Do not tell me what the problem is, why does not close the menu?)
March 19th 20 at 08:25
0 answer

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