Montserrat with Source Sans Pro in action on grounded.org

Under the hood

.header-1 { font-family: Montserrat, sans-serif; font-size: 22px; font-style: normal; font-weight: 300; letter-spacing: 2px; line-height: 33px; text-transform: uppercase; color: #333333; }
.header-2 { font-family: Montserrat, sans-serif; font-size: 56px; font-style: normal; font-weight: 600; letter-spacing: normal; line-height: 67px; text-transform: uppercase; color: #796C5E; }
.content-1 { font-family: "Source Sans Pro", sans-serif; font-size: 20px; font-style: normal; font-weight: 400; letter-spacing: normal; line-height: 31px; text-transform: none; color: #333333; }
.content-2 { font-family: "Source Sans Pro", sans-serif; font-size: 18px; font-style: normal; font-weight: 500; letter-spacing: 2px; line-height: 27px; text-transform: uppercase; color: #FFFFFF; }