I'm having trouble with keeping a layer both fixed and centered at the same time. I can't apply margin: auto as my layer doesn't have any width value, it's a fulid thing.
I found this one: https://stackoverflow.com/a/1777282/2114455
It's a great solution to center the layer, but how do I keep this centered layer fixed (I mean, no move when scrolling)
I put them all in a position: fixed; div but this did not work. Any solution?
Maybe I'm not understanding your question, but if you change the position of the outer div from the solution you linked to "fixed" it should work.
<div style="position: fixed; left: 50%;">
<div style="position: relative; left: -50%; border: dotted red 1px;">
I am some centered shrink-to-fit content! <br />
tum te tum
</div>
</div>
(fiddle of this in action: http://jsfiddle.net/Rykus0/TQw2j/)