Update style.css

style.css

@@ -68,6 +68,52 @@ header a:visited {
   margin-right: 2rem;
   margin-left: 1rem;
 }
+.header {
+  overflow: hidden;
+ background-color: var(--uibg);
+ display: flex;
+  font-weight:700;
+ justify-content: center;
+}
+
+.header a {
+  display: block;
+  color: #f2f2f2;
+  text-align: center;
+  padding: 14px 16px;
+  text-decoration: none;
+  font-size: 17px;
+}
+
+.header a:hover {
+    text-shadow: 2px 2px 6px var(--textcolor);
+}
+
+
+.header .icon {
+  display: none;
+}
+
+@media screen and (max-width: 600px) {
+  .topnav a:not(:first-child) {display: none;}
+  .topnav a.icon {
+    float: right;
+    display: block;
+  }
+}
+
+@media screen and (max-width: 600px) {
+  .topnav.responsive {position: relative;}
+  .topnav.responsive .icon {
+    position: absolute;
+    right: 0;
+    top: 0;
+  }
+  .header.responsive a {
+    float: none;
+    display: block;
+    text-align: left;
+  }
 
 footer a:hover,
 header a:hover {