Refer #121, settled the css for search-box's background.

kiya69 says that gcse's result bg is the same as gcse's search-box, so we
need to settled up the css.
#119: a little adjust
Merge branch 'search-boxUI#108' of https://github.com/s890081tonyhsu/councilor-voter-guide
Merge branch 'master' of https://github.com/g0v/councilor-voter-guide