Revert "Revert "Gang rework""

This reverts commit be0a08d70c.

css/buttons.scss

@@ -82,3 +82,27 @@ button {
         pointer-events: none;
     }
 }
+
+/**
+ * This is a button that is meant to be used on accordions (accordion-header and accordion-panel classes)
+ * It has a black background so it does not clash with the default accordion coloring
+ */
+.accordion-button {
+    @include borderRadius(12px);
+    @include boxShadow(1px 1px 3px #000);
+
+    color: #aaa;
+    font-size: $defaultFontSize;
+    font-weight: bold;
+    margin: 4px;
+    padding: 4px;
+    background-color: #000;
+
+    &:hover,
+    &:active {
+        color: #fff;
+        text-decoration: none;
+        cursor: pointer;
+    }
+    /* TODO focus selector? */
+}