diff --git a/custom.css b/custom.css
index 1d873ce5..92fa370f 100644
--- a/custom.css
+++ b/custom.css
@@ -70,3 +70,13 @@ textarea.invalid:focus {
overflow-wrap: normal;
overflow-x: scroll;
}
+
+body[data-style="dark"] {
+ background-color: #222529;
+}
+
+body[data-style="dark"] #source {
+ background-color: #181a1d;
+ border-color: #646b72;
+ color: #eee;
+}
diff --git a/index.html b/index.html
index 83284f78..07340920 100644
--- a/index.html
+++ b/index.html
@@ -15,7 +15,7 @@
-
+