PT Sans with Trend Sans One in action on nearlyimpossible.org

Under the hood

.header-1 { font-family: TrendSansOne; font-size: 24px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 33px; text-transform: none; color: #FFFFFF; }
.header-2 { font-family: TrendSansOne; font-size: 16px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 22px; text-transform: none; color: #474747; }
.content-1 { font-family: pt-sans, sans-serif; font-size: 18px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 27px; text-transform: none; color: #222222; }