Custom Font only shows up when opening Design/Custom CSS. Not on live site

I've imported a custom font and it only shows, when the page is being viewed with the "Custom CSS" page open. On the live site, or with another page open in Squarespace, the h1 and h2 fonts don't display correctly. See for yourselves here: https://www.svamae.com/test

Here the CSS I've added under Custom CSS:

@font-face {
font-family: 'Airbnb Cereal App Book';
font-style: normal;
font-weight: normal;
src: local('Airbnb Cereal App Book'), url('https://static1.squarespace.com/static/5d1c5598b57288000189eb6d/t/5d8753ede7a89537827e6f0a/1569149934367/AirbnbCerealBook.woff') format('woff');
}

@font-face {
font-family: 'Airbnb Cereal App Light';
font-style: normal;
font-weight: normal;
src: local('Airbnb Cereal App Light'), url('https://static1.squarespace.com/static/5d1c5598b57288000189eb6d/t/5d8753fe1d47f936914afb20/1569149951081/AirbnbCerealLight.woff') format('woff');
}

@font-face {
font-family: 'Airbnb Cereal App Medium';
font-style: normal;
font-weight: normal;
src: local('Airbnb Cereal App Medium'), url('https://static1.squarespace.com/static/5d1c5598b57288000189eb6d/t/5d8753e21d47f936914afa03/1569149923170/AirbnbCerealMedium.woff') format('woff');
}

@font-face {
font-family: 'Airbnb Cereal App Bold';
font-style: normal;
font-weight: normal;
src: local('Airbnb Cereal App Bold'), url('https://static1.squarespace.com/static/5d1c5598b57288000189eb6d/t/5d8753ce68af88237828efed/1569149902585/AirbnbCerealBold.woff') format('woff');
}

@font-face {
font-family: 'Airbnb Cereal App Extra Bold';
font-style: normal;
font-weight: normal;
src: local('Airbnb Cereal App Extra Bold'), url('https://static1.squarespace.com/static/5d1c5598b57288000189eb6d/t/5d8753f81d47f936914afaf1/1569149944845/AirbnbCerealExtraBold.woff') format('woff');
}

@font-face {
font-family: 'Airbnb Cereal App Black';
font-style: normal;
font-weight: normal;
src: local('Airbnb Cereal App Black'), url('https://static1.squarespace.com/static/5d1c5598b57288000189eb6d/t/5d8753b414ffd35492a0c69c/1569149877286/AirbnbCerealBlack.woff') format('woff');
}

h1 {
 font-family: 'Airbnb Cereal App  Black' !important;
   font-size: 34px;
   font-weight: 700;
   letter-spacing: -0.8px;
   color: #2b2b2b;
}

h1 strong {
 font-weight: bold;
 font-family: 'Airbnb Cereal App  Light' !important;
 color: #767676; 
 line-height: 10px;
 font-weight: 100;
 font-size: 32px;
 letter-spacing: -0.8px;
 margin-bottom: 32px;
 }
h2 {
 font-family: 'Airbnb Cereal App  Light' !important;
 color: #767676;
 line-height: 40px;
 font-weight: 100;
 font-size: 34px;
 letter-spacing: -0.8px;
 margin-bottom: 32px;
}
h3 {
 font-family: 'Airbnb Cereal App light' !important;
 color: #767676; 
 line-height: 15px;
 letter-spacing: -0.5px;

}

Thanks for any input - I've ran out of ideas on how to fix this…