Accordion

Related to design-system#44

ds-ml-css/components/accordion.scss

-/* ********************************************************************************************* */
-/* * ACCORDION ACCORDION ACCORDION ACCORDION ACCORDION ACCORDION ACCORDION ACCORDION ACCORDION * */
-/* * ACCORDION ACCORDION ACCORDION ACCORDION ACCORDION ACCORDION ACCORDION ACCORDION ACCORDION * */
-/* ********************************************************************************************* */
+details.accordion {
 
-/* accordion CSS rules */
-.accordion-btn {
-  border: none;
-  border-top: solid var(--ml-neutral) 2px;
-  border-bottom: transparent solid 2px;
-  background-color: var(--ml-background);
-  cursor: pointer;
-  padding: 18px;
-  width: 100%;
-  text-align: left;
+  summary {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    border-top: 2px solid var(--ml-border-accent-primary);
+    border-bottom: 2px solid transparent;
+    cursor: pointer;
+    padding: 18px;
+  }
+
+  summary::after {
+    content: "";
+    display: inline-block;
+    width: 6px;
+    height: 6px;
+    border-right: 2px solid currentColor;
+    border-bottom: 2px solid currentColor;
+    transform: rotate(45deg);
+    transition: transform 0.2s ease-in-out;
+    margin-top: 2px;
+    flex-shrink: 0;
+  }
+
+  summary:hover {
+    background-color: var(--ml-background-button-secondary-hover);
+  }
 }
 
-.accordion-btn:last-of-type {
-  border-bottom: solid var(--ml-neutral) 2px;
+details.accordion:last-of-type summary {
+  border-bottom-color: var(--ml-border-accent-primary);
 }
 
-.accordion-btn:hover {
-  background-color: var(--ml-m200);
-  border: none;
-  border-top: transparent solid 2px;
-  border-bottom: transparent solid 2px;
+details.accordion[open] summary::after {
+  transform: rotate(-135deg);
 }
 
-.accordion-btn.expanded {
-  background-color: var(--ml-m400);
-  border: none;
-  border-top: transparent solid 2px;
-  border-bottom: transparent solid 2px;
+details.accordion[open] summary {
+  background-color: var(--ml-background-button-secondary);
 }
 
-.accordion-panel {
-  margin: 10px 18px;
-  padding: 0 5px;
-  background-color: var(--ml-neutral);
-  display: none;
+details.accordion > div:first-of-type {
+  margin: 16px;
+  padding: 0 8px;
+  background-color: var(--ml-background-accent-secondary);
   overflow: hidden;
 }