I don't know if I'm even posting in the right section.
When I open a new tab (after closing all other tabs) and I input address of project site. Elements pops out of parent element (it's 50% of bottom is visible, while rest is through the top of the window). When I refresh the page, everything goes back to normal. The element is right on it's place (about 100px under the top of the window).
Is there any specific reason that such thing could happen, or is it really CSS? Because CSS is valid, but the browser interprets it weirdly first time and then after refresh it interprets it right.
I don't know what to make out of it. Any ideas?