feat: improve navigation in footer

src/App.css

@@ -19,6 +19,7 @@ body {
 }
 
 footer {
+  margin-top: 24px;
   font-size: x-small;
 }
 
@@ -208,6 +209,10 @@ button,
 }
 
 .navbar {
+  span {
+    padding: 4px;
+  }
+
   button {
     font-size: medium;
     margin: 4px 0.5%;