#136 #137 のプルリク修正

frontend/src/index.css

@@ -1,3 +1,5 @@
+@import "@fontsource-variable/noto-sans-jp";
+
 @tailwind base;
 @tailwind components;
 @tailwind utilities;
@@ -22,7 +24,7 @@
 
 :root
 {
-  font-family: system-ui, Avenir, Helvetica, Arial, sans-serif;
+  font-family: "Noto Sans JP Variable", system-ui, Avenir, Helvetica, Arial, sans-serif;
   line-height: 1.5;
   font-weight: 400;