After working on my website, www.alexanderpopov.org, I encountered an issue with the navigation bar disappearing on some computers and browsers. I'm using css to style it, but the problem persists. Below is the HTML code for your reference. Any advice or suggestions would be greatly appreciated!
<!doctype html>
<html>
<head>
...
And here is the css:
@charset "UTF-8";
/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2 family=Open+Sans:ital,wght@0,300;0,400;0,600;1,300;1,400;1,600&display=swap');
/* Body */
body {
...
}
...