Added --paper-slide-font-size

Author: Link2Twenty

demo/index.html

@@ -24,6 +24,9 @@
             padding: 2px;
             box-shadow: inset 0 0 5px 1px rgba(0,0,0,0.6);
           }
+          .demo-style {
+            --paper-slide-font-size: 64px;
+          }
         }
       </style>
     </custom-style>
@@ -49,7 +52,6 @@
         vertical-align: middle;
         line-height: 600px;
         color: #fff;
-        font-size: 64px !important;
         font-weight: bolder
       }
       .paper-slide-blue {