refactor: button in the header to make it responsive

Author: ORKO06

src/styles/Header.css

@@ -11,7 +11,7 @@
   padding: 20px;
   border: none;
   margin-top: 20em;
-  margin-left: 60em;
+  margin-left: calc(((100% - 270px) / 3) * 2);
 }
 
 .header button:hover {
@@ -22,5 +22,5 @@
   padding: 20px;
   border: none;
   margin-top: 20em;
-  margin-left: 60em;
+  margin-left: calc(((100% - 270px) / 3) * 2);
 }