feat(style): increase global bottom margin

Author: VChet

src/assets/global.scss

@@ -69,7 +69,7 @@ html {
   }
 }
 #app {
-  margin: 1rem 0;
+  margin: 1rem 0 3rem;
 }
 h1, h2, h3, h4, h5, h6 {
   text-wrap: balance;