Mark in action on begin.com

.header-1 { font-family: Mark, Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 20px; font-style: normal; font-weight: 300; letter-spacing: -0.5px; line-height: 24px; text-transform: none; color: #666666; }
.header-2 { font-family: Mark, Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 72px; font-style: normal; font-weight: 700; letter-spacing: -4px; line-height: 72px; text-transform: none; color: #FD6D6D; }
.header-3 { font-family: Mark, Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 20px; font-style: normal; font-weight: 700; letter-spacing: -0.5px; line-height: 24px; text-transform: none; color: #666666; }
.content-1 { font-family: Mark, Avenir, "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 24px; font-style: normal; font-weight: 500; letter-spacing: -0.6px; line-height: 28.8px; text-transform: none; color: #333333; }
Found by @mikesten on 11 Mar 2018.

Liked by:
@mikesten @Joshua_D_ @Readdayandnight @zemsgraff @mishapivo

Mark