Here is one way to center a fixed-width/fixed-height div at the center of its container. This could be adapted to centering text, images, etc. within their containers. Essentially, we do a bit of arithmetic to get the fixed-sized element centered using absolute positioning and margins. Note that the parent container must have a position: relative property for this to work.

div { position: absolute; top: 50%; left: 50%; width: 400px; height: 300px; margin-top: -150px; /* 1/2 of your element height*/ margin-left: -200px; /* 1/2 of your element width */ }
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