css menu center of screen
/* css code */
.container{
top: 50%;
left: 50%;
transform: translateX(-50%) translateY(-50%);
position: absolute;
}
/* html code */
<div class="container">
<li><a href="#" class="link">Home</a></li>
<li><a href="#" class="link">About Us</a></li>
<li><a href="#" class="link">Services</a></li>
<li><a href="#" class="link">Gallery</a></li>
<li><a href="#" class="link">Contact</a></li>
</div>