Page top-margin issue because of recent header height change

[ardacebi]

Recently, the height of the header has been changed due to the addition of the school indicator below the Decury logo with #18.

This change added a bug that causes all pages to not have the necessary top margin.

As a solution to the issue, I've tried to add a top margin to the first element on the home screen, which is the classroom overview div:

.classroomdiv {
margin-top:110px;
}

Then I realized that this issue requires a fix for all pages and not just the home screen. I've removed my home screen fix with a commit and there's a need for a fix for all pages.