chore: rm useless styles and add font smoothing

Author: haxgun

frontend/src/assets/main.css

@@ -52,13 +52,12 @@
 }
 
 body {
-  font-family: 'Inter', sans-serif;
-  margin: 0;
-  padding: 0;
+  font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji",Segoe UI Symbol;
+  -moz-osx-font-smoothing:grayscale;
+  -webkit-font-smoothing:antialiased;
+  text-rendering:optimizeSpeed;
   background-color: #000;
-
   color: #f2f2f2;
-  font-weight: 400;
 }
 
 svg {