Revert "Front page is not double wrapped in card"

This reverts commit 3a7a2ed4182e24466b9219c821fdbfbb6fe6ebcd.
Revert "Fix padding on regular pages"

This reverts commit 945edb93b6f6fa6550075a0e056d78d4fef62285.
Revert "Post thumbnails layout properly"

This reverts commit db45095818fb023830bf0c07f7d14bccf8d0029b.
Revert "Front page displays only three posts"

This reverts commit b79bafeb75813be486130b668d4673f44ec9b60f.
Pin the navigation bar to the top of the page