Update styles.css

styles.css

@@ -215,26 +215,26 @@ section::after {
 
 .tabs label::before{
   content: '';
-  position: left;
+  position: absolute;
   top: 0;
   right: 0;
   bottom: 0;
   left: 0;
-  z-index: -1;
+  z-index: -3;
   margin: -10px;
-  background: #0d131f;
+  background-color: #0d131f;
 }
 
 .tabs label::after{
   content: '';
-  position: left;
+  position: absolute;
   top: 0;
   right: 0;
   bottom: 0;
   left: 0;
   z-index: -1;
   margin: -10px;
-  background: #090d14;
+  background-color: #090d14;
 }