Thank you for your advice. However, only this code has solved the issue:
@font-face { font-family: FivoSans; font-style: normal; src: url("FivoSans-Medium.woff2") format("woff2"), url("FivoSans-Medium.woff") format("woff"); } .fivosans-custom-class { font-family: 'FivoSans'; font-weight: medium; } .fivosans-medium-custom-class { font-family: 'FivoSans'; font-weight: medium; } .newsfeed .medium { font-family: FivoSans; }I had to add .medium, and now it works 😊👍 Thank you very much!