Header tags in Wordpress editor- Product Theme

Fyi-
Mohanjith caught this one in one of the chats.

Wordpress text and html editor <h>header tags may not work unless this line of code in _inc/css/product is deleted:

font-size:100%;

from
table,caption,tbody,tfoot,thead,tr,th,td{margin:0;padding:0;border:0;outline:0;font-size:100%;vertical-align:baseline;background:transparent;}
body{background:#fff;line-height:1;}