Avenir Next with Monostena in action on updroid.com

Under the hood

.header-1 { font-family: 'Avenir Next LT W01 Bold'; font-size: 26px; font-style: normal; font-weight: normal; letter-spacing: -1px; line-height: 32px; text-transform: none; color: #0C0C0C; }
.header-2 { font-family: 'Avenir Next LT W01 Bold'; font-size: 16px; font-style: normal; font-weight: normal; letter-spacing: -1px; line-height: 22px; text-transform: none; color: #7E7E7E; }
.content-1 { font-family: 'Avenir Next LT W01 Bold'; font-size: 18px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 50px; text-transform: none; color: #FF2919; background-color: #F1F4F4; }
.content-2 { font-family: 'Monosten A'; font-size: 14px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 20px; text-transform: none; color: #7E7E7E; }
.content-3 { font-family: 'Monosten A'; font-size: 14px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 20px; text-transform: none; color: #7E7E7E; }
.content-4 { font-family: 'Monosten A'; font-size: 14px; font-style: normal; font-weight: normal; letter-spacing: normal; line-height: 20px; text-transform: none; color: #7E7E7E; }