Link on a fixed area above a background-position:cover background image

[D3MONIC]

I have this landing page. I'd like the email to be a link to mailto:[email protected] tried to use a map (usemap="#mail" on body and then map name="mail">) but it doesn't work. I tried also with a blank transparent png image (to set the usemap to) but the link isn't clickable.How can I achieve the area of the email to have a link upon it? Of course it should work on different resolutions.