@@ -24,9 +24,11 @@
     .panels {
       min-height:100vh;
       overflow: hidden;
+      display: flex;
     }
 
     .panel {
+      flex: 1;
       background:#6B0F9C;
       box-shadow:inset 0 0 0 5px rgba(255,255,255,0.1);
       color:white;
@@ -41,6 +43,10 @@
       font-size: 20px;
       background-size:cover;
       background-position:center;
+      justify-content: center;
+      align-items: center;
+      display: flex;
+      flex-direction: column;
     }
 
 
@@ -50,12 +56,29 @@
     .panel4 { background-image:url(https://source.unsplash.com/ITjiVXcwVng/1500x1500); }
     .panel5 { background-image:url(https://source.unsplash.com/3MNzGlQM7qs/1500x1500); }
 
+/* Flex Children */
     .panel > * {
       margin:0;
       width: 100%;
       transition:transform 0.5s;
+      flex: 1 0 auto;
+      display: flex;
+      justify-content: center;
+      align-items: center;
+    }
+    .panel > *:first-child {
+      transform: translateY(-100%);
+    }
+    .panel.open-active > *:first-child {
+      transform: translateY(0);
+    }
+    
+    .panel > *:last-child {
+      transform: translateY(100%);
+    }
+    .panel.open-active > *:last-child {
+      transform: translateY(0);
     }
-
     .panel p {
       text-transform: uppercase;
       font-family: 'Amatic SC', cursive;
@@ -68,6 +91,7 @@
 
     .panel.open {
       font-size:40px;
+      flex: 5;
     }
 
     .cta {
@@ -107,7 +131,26 @@
   </div>
 
   <script>
+    const panels = document.querySelectorAll('.panel');
+
+    function toggleOpen() {
+      if (this.classList.contains('open')) {
+        //closing an open panel
+        this.classList.remove('open');
+      } else {
+        //clicking another panel that isn't currently open
+        panels.forEach(panel => panel.classList.remove('open'));
+        this.classList.toggle('open');
+      }
+    }
 
+    function toggleActive(e) {
+      if(e.propertyName.includes('flex')) {
+        this.classList.toggle('open-active');
+      }
+    }
+    panels.forEach(panel => panel.addEventListener('click',toggleOpen));
+    panels.forEach(panel => panel.addEventListener('transitionend',toggleActive));
   </script>