fix scroller styles; closes #1724 (#1785)

packages/webawesome/docs/docs/resources/changelog.md

@@ -15,6 +15,7 @@ Components with the <wa-badge variant="warning">Experimental</wa-badge> badge sh
 
 - Fixed a bug in `<wa-slider>` that caused some touch devices to end up with the incorrect value [issue:1703]
 - Fixed a bug in `<wa-card>` that prevented some slots from being detected correctly [discuss:1450]
+- Fixed a z-index bug in `<wa-scroller>` styles [issue:1724]
 - Fixed a bug in `<wa-icon>` that caused some icon libraries to render with the incorrect SVG fill [issue:1733]
 - Fixed a bug in `<wa-tree-item>` that caused the spinner to not show when lazy loading [issue:1678]
 - Fixed a bug in `<wa-dropdown>` that caused the browser to hang when cancelling the `wa-hide` event [issue:1483]

packages/webawesome/src/components/scroller/scroller.css

@@ -53,6 +53,19 @@
   overflow-y: auto;
 }
 
+#start-shadow,
+#end-shadow {
+  z-index: 2;
+}
+
+#start-shadow {
+  opacity: var(--start-shadow-opacity);
+}
+
+#end-shadow {
+  opacity: var(--end-shadow-opacity);
+}
+
 /* Horizontal shadows */
 :host([orientation='horizontal']) {
   #start-shadow,
@@ -64,14 +77,6 @@
     pointer-events: none;
   }
 
-  #start-shadow {
-    opacity: var(--start-shadow-opacity);
-  }
-
-  #end-shadow {
-    opacity: var(--end-shadow-opacity);
-  }
-
   #start-shadow {
     &:dir(ltr) {
       left: 0;
@@ -102,21 +107,12 @@
   #start-shadow,
   #end-shadow {
     position: absolute;
-    z-index: 2;
     right: 0;
     left: 0;
     height: var(--shadow-size);
     pointer-events: none;
   }
 
-  #start-shadow {
-    opacity: var(--start-shadow-opacity);
-  }
-
-  #end-shadow {
-    opacity: var(--end-shadow-opacity);
-  }
-
   #start-shadow {
     top: 0;
     background: linear-gradient(to bottom, var(--shadow-color), transparent 100%);