style.css

@@ -83,12 +83,15 @@
   .card-back:after {
     color: #11181f;
   }
+  
+  @media(hover: hover) and (pointer: fine) {
     .card:hover .card-front {
       transform: rotateX(-180deg);
     }
     .card:hover .card-back {
       transform: rotateX(0deg);
     }
+  }
   .card .line-numbers {
     position: absolute;
     top: 0;