Fixes #8266: remove unnecessary `strong` and `em` styles
Fix overlap sidebar for Tablets and up in docs
Fixes #8211: restore proper table grid class behavior

Needs work though—we shouldn't be setting this stuff with the attribute
selectors, but it's the easiest solution for now.
Make on previous commits
Move grid offsets to desktop only (fixes #8229)
Merge pull request #8268 from luishdez/hotfix/sidebar-overlap

Fix overlap sidebar for Tablets and up in docs
Merge pull request #11 from twitter/3.0.0-wip

3.0.0 wip