diff --git a/html/main.css b/html/main.css
index fd51848..5a2cb89 100644
--- a/html/main.css
+++ b/html/main.css
@@ -295,6 +295,9 @@ label {
 .js-Dropdown-title {
 	width: 100%;
 	text-align: left;
+	position: relative;
+	z-index: 999;
+	padding: 2px 6px; /* Needs additional padding to match <select> */
 }
 .js-Dropdown-list {
 	background: #fff;
@@ -304,11 +307,11 @@ label {
 	box-sizing: border-box;
 	display: none;
 	list-style: none;
-	margin: -2px 0 0 0;
+	margin: -5px 0 0 0;
 	padding: 0;
 	position: absolute;
 	min-width: 100%;
-	z-index: 999;
+	z-index: 998;
 	max-height: 80vh;
 	overflow-y: auto;
 }
@@ -331,3 +334,6 @@ label {
 	padding: 2px 3px;
 	line-height: 1.3;
 }
+.js-Dropdown-optgroup:first-child {
+	padding-top: 4px;
+}