editing header

Hi there My website is simonhowardmusic.com, i am trying to remove the search bar icon from the header and it isn't happening easily. I have tried display:none in additional css and also theme editor as it isnt showing as a widget. Can anyone help Also the background to my site title has gone to #fffff2 and i just want it to be default but doesn't seem to happen in header title option Will this be code as well Regards