Add animation styles and transitions to drop down menu and backdrop

src/Connected.Components/Styles/components/_dropdown.scss

@@ -1,22 +1,18 @@
 @use "../globals/" as *;
 @use "../util/" as *;
 
-
-
-
 .drop-down {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    min-width: 80%;
+   height: auto;
+   max-height: max-content;
    width: 80%;
-  height: 0;
-  max-height: 0;
+   opacity: 0;
    display: flex;
    flex-direction: column;
-  opacity: 0;
-  pointer-events: none;
    z-index: $dropdown-zindex;
    list-style: none;
    background-color: #fff;
@@ -25,6 +21,35 @@
    transition: all 0.3s ease-in-out;
 }
 
+.drop-down.fade-in {
+   animation: fade-in 0.3s ease-in-out forwards;
+}
+
+.drop-down.fade-out {
+   animation: fade-out 0.3s ease-in-out forwards;
+}
+
+@keyframes fade-in {
+   0% {
+      opacity: 0;
+   }
+
+   100% {
+      opacity: 1;
+   }
+}
+
+@keyframes fade-out {
+   0% {
+      opacity: 1;
+   }
+
+   100% {
+      opacity: 0;
+   }
+}
+
+
 @include breakpoint(sm) {
   .drop-down {
     position: absolute;
@@ -39,10 +64,9 @@
 }
 
 .backdrop {
-  display: none;
-  opacity: 0;
    z-index: $backdrop-zindex;
    position: fixed;
+   display: block;
    top: 0;
    right: 0;
    bottom: 0;