Fix

themes/mytheme/assets/css/core/reset.css

@@ -1,5 +1,5 @@
 @import url("https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.8/dist/web/static/pretendard.css");
-@import url("https://fonts.googleapis.com/css2?family=Gowun+Batang:wght@400;700&family=Gowun+Dodum&family=JetBrains+Mono&family=Source+Sans+3:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,500;0,8..60,600;0,8..60,700;1,8..60,400");
+@import url("https://fonts.googleapis.com/css2?family=Gowun+Batang&family=Gowun+Dodum");
 
 @font-face {
   font-family: "Line Sans";
@@ -18,6 +18,40 @@
   font-weight: 300;
 }
 
+@font-face {
+  font-family: "Source Sans 3";
+  src: url("/SourceSans3-Regular.woff2");
+}
+
+@font-face {
+  font-family: "Source Sans 3";
+  src: url("/SourceSans3-It.woff2");
+  font-style: italic;
+}
+
+@font-face {
+  font-family: "Source Sans 3";
+  src: url("/SourceSans3-Bold.woff2");
+  font-weight: bold;
+}
+
+@font-face {
+  font-family: "Source Sans 3";
+  src: url("/SourceSans3-Light.woff2");
+  font-weight: 300;
+}
+
+@font-face {
+  font-family: "Jetbrains Mono";
+  src: url("/JetbrainsMono-Regular.woff2");
+}
+
+@font-face {
+  font-family: "Jetbrains Mono";
+  src: url("/JetbrainsMono-Italic.woff2");
+  font-style: italic;
+}
+
 *,
 ::after,
 ::before {