Karla with Optima in action on contemporaryhotels.com.au

• .header-1 { font-family: OptimaLTStd, Segoe, "Segoe UI", Candara, Calibri, Arial, sans-serif; font-size: 30px; font-style: normal; font-weight: 400; letter-spacing: normal; line-height: 36px; text-transform: none; color: #4A4A4A; }
• .content-1 { font-family: Karla, Helvetica, Arial, sans-serif; font-size: 16px; font-style: normal; font-weight: 400; letter-spacing: normal; line-height: 24px; text-transform: none; color: #4A4A4A; }
• .content-2 { font-family: Karla, Helvetica, Arial, sans-serif; font-size: 18px; font-style: normal; font-weight: 400; letter-spacing: normal; line-height: 27px; text-transform: none; color: #4A4A4A; }

Karla is available from Font Squirrel and Google Web Fonts.

Optima is available from Fonts.com and MyFonts.