Update styles

Author: Robert-André Mauchin

image-comparison-web/demo.css

@@ -60,3 +60,32 @@
           padding-bottom: 2em;
           color: #3f5087;
       }
+
+
+* {box-sizing: border-box;}
+
+.img-comp-container {
+  position: relative;
+}
+
+.img-comp-img {
+  position: absolute;
+  overflow:hidden;
+}
+
+.img-comp-img canvas {
+  display:block;
+  vertical-align:middle;
+}
+
+.img-comp-slider {
+  position: absolute;
+  z-index: 9;
+  cursor: ew-resize;
+  /*set the appearance of the slider:*/
+  width: 40px;
+  height: 40px;
+  background-color: #2196F3;
+  opacity: 0.7;
+  border-radius: 50%;
+}