Revert "custom styles"

This reverts commit 4e62eca5e450877912e1c3cda334741b774fb083, reversing
changes made to d633cdbffbd1db436f772028813db690c0f08724.

Conflicts:
	app/assets/stylesheets/static_pages.css.scss
	app/views/layouts/_header.html.erb
	app/views/static_pages/home.html.erb