Add fallback sans-serif font (#1568)

Author: infomiho

web/src/css/custom.css

@@ -58,7 +58,7 @@
 
   /* Infima overrides */
   --ifm-container-width-xl: 1280px;
-  --ifm-font-family-base: "Inter";
+  --ifm-font-family-base: "Inter", sans-serif;
   --ifm-color-primary: #bf9900; /* wasp color (ffcc00) darkened by 25% */
   --ifm-color-primary-dark: #8a6f04;
   --ifm-color-primary-darker: rgb(31, 165, 136);

web/src/pages/index.css

@@ -1,6 +1,6 @@
 
 html {
-  font-family: Inter;
+  font-family: Inter, sans-serif;
 }
 
 html,