Summary:
Safari has a weird bug with `border-radius` plus border color:
{F35865}
Move the uncolored borders to an internal div to fix this. Also tweak some positioning on icons for cards, and add a "magenta" color.
Test Plan: {F35866}
Reviewers: chad, btrahan
Reviewed By: chad
CC: aran
Differential Revision: https://secure.phabricator.com/D5338
