First thing I noticed is that you have the .wrap
set to 940px on line 560, which causes the hyperlink to move towards the right of the image. If you change that back to 1140px it will move back and cover the image. Then you’ll probably want to change this (line 1326) –
.header-full-width .title-area,
.header-full-width .site-title {
width: 100%;
}
….to a smaller width, like 300px or whatever size your image is and that way the link won’t cover the entire width of the page.