Proxima Nova in action on content.nanobox.io

.header-1 { font-family: proxima-nova, sans-serif; font-size: 50px; font-style: normal; font-weight: 700; letter-spacing: normal; line-height: 57.5px; text-transform: none; color: #404040; }
.header-2 { font-family: proxima-nova, sans-serif; font-size: 14px; font-style: normal; font-weight: 600; letter-spacing: normal; line-height: 33.66px; text-transform: uppercase; color: #738A94; }
.header-3 { font-family: proxima-nova, sans-serif; font-size: 27.72px; font-style: italic; font-weight: 400; letter-spacing: normal; line-height: 31.878px; text-transform: none; color: #404040; }
.content-1 { font-family: proxima-nova, sans-serif; font-size: 19.8px; font-style: normal; font-weight: 400; letter-spacing: normal; line-height: 33.66px; text-transform: none; color: #484848; }
Proxima Nova is available from Fontdeck, Fonts.com, Fontshop, Fontspring, MyFonts, Typekit and YouWorkForThem.
Found by @mikesten on 2 Feb 2018.

Liked by:
@mikesten @Joshua_D_ @DewiEirig @gmogilewski

Proxima Nova