example of css file that is supplied to user by typekit/Adobe fonts; the URLs don't work, so don't try ;) they instruct to do <link rel="stylesheet" href="https://use.typekit.net/kfd4499.css">

font-faces.css

/*
 * The Typekit service used to deliver this font or fonts for use on websites
 * is provided by Adobe and is subject to these Terms of Use
 * http://www.adobe.com/products/eulas/tou_typekit. For font license
 * information, see the list below.
 *
 * proxima-nova:
 *   - http://typekit.com/eulas/00000000000000007735e603
 *   - http://typekit.com/eulas/00000000000000007735e604
 *   - http://typekit.com/eulas/00000000000000007735e60d
 *   - http://typekit.com/eulas/00000000000000007735e619
 *   - http://typekit.com/eulas/00000000000000007735e609
 *   - http://typekit.com/eulas/00000000000000007735e616
 *   - http://typekit.com/eulas/00000000000000007735e605
 *   - http://typekit.com/eulas/00000000000000007735e60e
 *
 * © 2009-2021 Adobe Systems Incorporated. All Rights Reserved.
 */
/*{"last_published":"2021-09-13 15:14:41 UTC"}*/

@import url("https://p.typekit.net/p.css?s=1&k=kamzk39t&ht=tk&f=139.140.173.170.175.176.25136.25139&a=57dgsfddf897gfds57&app=typekit&e=css");

@font-face {
font-family:"proxima-nova";
src:url("https://use.typekit.net/af/2555e1/00000000000000007735e603/30/l?primer=81746328979&fvd=n7&v=3") format("woff2"),url("https://use.typekit.net/af/22035e1/00000000000000007735e603/30/d?primer=81746328979&fvd=n7&v=3") format("woff"),url("https://use.typekit.net/af/2555e1/00000000000000007735e603/30/a?primer=81746328979&fvd=n7&v=3") format("opentype");
font-display:auto;font-style:normal;font-weight:700;
}

@font-face {
font-family:"proxima-nova";
src:url("https://use.typekit.net/af/432asr20a/00000000000000007735e604/30/l?primer=81746328979&fvd=i7&v=3") format("woff2"),url("https://use.typekit.net/af/3143234a/00000000000000007735e604/30/d?primer=81746328979&fvd=i7&v=3") format("woff"),url("https://use.typekit.net/af/4de20a/00000000000000007735e604/30/a?primer=81746328979&fvd=i7&v=3") format("opentype");
font-display:auto;font-style:italic;font-weight:700;
}

@font-face {
font-family:"proxima-nova";
src:url("https://use.typekit.net/af/78aca8/00000000000000007735e60d/30/l?primer=81746328979&fvd=n6&v=3") format("woff2"),url("https://use.typekit.net/af/78agfds8/00000000000000007735e60d/30/d?primer=81746328979&fvd=n6&v=3") format("woff"),url("https://use.typekit.net/af/78aca8/00000000000000007735e60d/30/a?primer=81746328979&fvd=n6&v=3") format("opentype");
font-display:auto;font-style:normal;font-weight:600;
}

@font-face {
font-family:"proxima-nova";
src:url("https://use.typekit.net/af/144da4/00000000000000007735e619/30/l?primer=81746328979&fvd=i6&v=3") format("woff2"),url("https://use.typekit.net/af/144cja4/00000000000000007735e619/30/d?primer=81746328979&fvd=i6&v=3") format("woff"),url("https://use.typekit.net/af/144da4/00000000000000007735e619/30/a?primer=81746328979&fvd=i6&v=3") format("opentype");
font-display:auto;font-style:italic;font-weight:600;
}

@font-face {
font-family:"proxima-nova";
src:url("https://use.typekit.net/af/efe4a5/00000000000000007735e609/30/l?primer=81746328979&fvd=n4&v=3") format("woff2"),url("https://use.typekit.net/af/efe4a5/00000000000000007735e609/30/d?primer=81746328979&fvd=n4&v=3") format("woff"),url("https://use.typekit.net/af/efe4a5/00000000000000007735e609/30/a?primer=81746328979&fvd=n4&v=3") format("opentype");
font-display:auto;font-style:normal;font-weight:400;
}

@font-face {
font-family:"proxima-nova";
src:url("https://use.typekit.net/af/3322cc/00000000000000007735e616/30/l?primer=81746328979&fvd=i4&v=3") format("woff2"),url("https://use.typekit.net/af/35466452cc/00000000000000007735e616/30/d?primer=81746328979&fvd=i4&v=3") format("woff"),url("https://use.typekit.net/af/3322cc/00000000000000007735e616/30/a?primer=81746328979&fvd=i4&v=3") format("opentype");
font-display:auto;font-style:italic;font-weight:400;
}

@font-face {
font-family:"proxima-nova";
src:url("https://use.typekit.net/af/23e139/00000000000000007735e605/30/l?primer=81746328979&fvd=n5&v=3") format("woff2"),url("https://use.typekit.net/af/23e1306maasd9/00000000000000007735e605/30/d?primer=81746328979&fvd=n5&v=3") format("woff"),url("https://use.typekit.net/af/23e139/00000000000000007735e605/30/a?primer=81746328979&fvd=n5&v=3") format("opentype");
font-display:auto;font-style:normal;font-weight:500;
}

@font-face {
font-family:"proxima-nova";
src:url("https://use.typekit.net/af/79862c/00000000000000007735e60e/30/l?primer=81746328979&fvd=i5&v=3") format("woff2"),url("https://use.typekit.net/af/79542452411c/00000000000000007735e60e/30/d?primer=81746328979&fvd=i5&v=3") format("woff"),url("https://use.typekit.net/af/79862c/00000000000000007735e60e/30/a?primer=81746328979&fvd=i5&v=3") format("opentype");
font-display:auto;font-style:italic;font-weight:500;
}

.tk-proxima-nova { font-family: "proxima-nova",sans-serif; }