Source Sans Pro in action on coda.io

Under the hood

.header-1 { font-family: "Source Sans Pro", sans-serif; font-size: 40px; font-style: normal; font-weight: bold; letter-spacing: normal; line-height: 44px; text-transform: none; color: #FFFFFF; }
.content-1 { font-family: "Source Sans Pro", sans-serif; font-size: 24px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 36px; text-transform: none; }