Let page background shine through the footer

By visually separating it from other page content with an additional gradient background only when necessary.

src/components/CallFooter.module.css

@@ -19,11 +19,6 @@ Please see LICENSE in the repository root for full details.
   padding-right: calc(env(safe-area-inset-right) + var(--cpd-space-6x));
   padding-block: var(--cpd-space-10x)
     calc(env(safe-area-inset-bottom) + var(--cpd-space-10x));
-  background: linear-gradient(
-    180deg,
-    rgba(0, 0, 0, 0) 0%,
-    var(--cpd-color-bg-canvas-default) 100%
-  );
 }
 
 .footer.hidden {

src/components/CallFooter.tsx

@@ -112,11 +112,17 @@ export interface FooterState {
 }
 
 export interface FooterProps {
+  className?: string;
   ref?: Ref<HTMLDivElement>;
   children?: JSX.Element | JSX.Element[] | false;
   vm: ViewModel<FooterSnapshot>;
 }
-export const CallFooter: FC<FooterProps> = ({ ref, children, vm }) => {
+export const CallFooter: FC<FooterProps> = ({
+  className,
+  ref,
+  children,
+  vm,
+}) => {
   const asOverlay = useBehavior(vm.asOverlay$);
   const showFooter = useBehavior(vm.showFooter$);
   const hideControls = useBehavior(vm.hideControls$);
@@ -292,7 +298,7 @@ export const CallFooter: FC<FooterProps> = ({ ref, children, vm }) => {
     <div
       ref={ref}
       data-testid="footer-container"
-      className={classNames(styles.footer, {
+      className={classNames(className, styles.footer, {
         [styles.overlay]: asOverlay,
         [styles.hidden]: !showFooter,
       })}