margin 0 auto
Specifying 0 tells the browser to set the top and bottom margin to 0.
Specifying auto tells the browser to automatically determine the left
and right margins equally.
It's the same as:
margin-top:0;
margin-bottom:0;
margin-left:auto;
margin-right:auto;css my body have margin top
You probably have an element with margin-top as one of the first children of body.
Read up on collapsing margins.
Purely as a simple test, set padding: 1px on body. If the gap goes away, I'm right.
/*
from stackoverflow.com ->
css & html5: why does my body have a spacing at the top
*/Copyright © 2021 Codeinu
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