Update style.css

style.css

@@ -25,20 +25,21 @@ main {
     position: relative;
     margin-left: 0px;
     margin-top: 270px;
+    z-index: 0;
   }
 }
 
 @media only screen and (max-width: 815px) {
   #navbar {
   position: absolute;
-  min-width: 290px;
-  top: 0px;
-  left: 0px;
+  top: 0;
+  padding: 0;
+  margin: 0;
   width: 100%;
   max-height: 275px;
   border: none;
-  border-bottom: 2px solid;
   z-index: 1;
+  border-bottom: 2px solid;
   }
 }