🎨 Style dropdowns

Author: shnizzedy

docs/_sources/_static/custom.css

@@ -1,3 +1,19 @@
+/* docs version dropdown: top bar */
+.brand > select {
+  background: transparent;
+  border: none;
+  color: var(--color-header-text);
+}
+
+/* docs version dropdown: side bar */
+.sidebar-brand-text > select {
+    background-color: transparent;
+    border: none;
+    color: var(--color-sidebar-link-text--top-level);
+    text-decoration: underline;
+    text-decoration-color: var(--color-link-underline);
+}
+
 .svg-flowchart > svg {
   width: 100%;
   height: auto;