Changing the design of the filter/search screen

[padimark]

Hi All

Wonder if anyone can assist.

I am trying to figure out how to change the waqy my filer/search looks in the sidebar here http://www.diveshoponline.co.uk/acat...ount-Sale.html

The top left sidebar is the search im trying to modify. The font in the drop downs is too small and the blue button and clear button are not clear

Pretty basic really but i cant find a way to edit this.

Thanks
Mark