Add support for dark mode

Author: josh-wong

src/css/SupportDropdownMenu.module.css

@@ -14,7 +14,7 @@
   font-size: 14px;
   font-weight: 700;
   justify-content: space-between;
-  min-width: 140px;
+  min-width: 150px;
   padding: 6px 12px;
   text-align: left;
   z-index: 1;
@@ -30,7 +30,7 @@
   color: var(--ifm-color-emphasis-700);
   display: block;
   font-size: 14px;
-  min-width: 230px;
+  min-width: 265px;
   position: absolute;
   right: 0;
   z-index: 1;
@@ -58,3 +58,17 @@
 .supportDropdownContent a:hover {
   background-color: var(--ifm-dropdown-hover-background-color);
 }
+
+html[data-theme="dark"] .supportDropBtn {
+  background-color: #505050;
+  border: #6B7280 1px solid;
+  color: #f9f9f9;
+}
+
+html[data-theme="dark"] .supportDropdownContent {
+  background-color: #505050;
+
+  a {
+    color: #f9f9f9;
+  }
+}