How to move a fixed element to the front?

[Linda Rammes]

Hello!

I have some trouble with fixing elements and – at the same time – moving them to the front.
Here is my webseite:
http://annaverenanosthoff.com/publications/

The elements »Publications« and the blue button on the top are supposed to be above the content elements. But unfortunately this doesn't work.

I created two id classes – »position-fixed« and »content« and worked with z-index, but the fixed elements stay below the content elements.

Does someone have an idea?

[arminunruh]

read about stacking contexts:

https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Positioning/Understanding_z_index/The_stacking_context

so the issue is some of lay theme's divs have position: relative;

so thats creating a new stacking context