z-index and gravity form field problems

Hello.

I’m having problems resolving a z-index issue. The two lower fields of my form are conflicting with (I think) the Avia text block section of the site. The form select field’s drop-down menu displays behind the H1, H2 and body copy content. Also the user cannot simply place the cursor in the paragraph text field and type (instead, they need to tab over to enter a response).

Would you please take a look and help me identify the specific properties I need to target and their respective z-index #s. I feel like I have tried everything and cannot get it to work.

Thanks!
sk