Add new css3 [Leading-Trim feature](https://medium.com/microsoft-design/leading-trim-the-future-of-digital-typesetting-d082d84b202). h1 { text-edge: cap alphabetic; leading-trim: both; }
Add new css3 Leading-Trim feature.
h1 {
text-edge: cap alphabetic;
leading-trim: both;
}