Fix wine list background color
Adjust spacing
Center content container
Remove border-radius on tabs
Fix menu markup
Remove display:table on site-wrapper

I didn't know what this was doing, so I killed it. If there's a reason
it should be there, we can add it back.
Restructure layout so each section has its own wrapper

Allow for a full-width background color. Killed the site-wrapper-inner
class since it wasn't doing anything.
Remove unused code…yay!