diff --git a/botanjs/src/Astro/Blog/Components/Spoiler.css b/botanjs/src/Astro/Blog/Components/Spoiler.css
index 463ff17..c0c162f 100644
--- a/botanjs/src/Astro/Blog/Components/Spoiler.css
+++ b/botanjs/src/Astro/Blog/Components/Spoiler.css
@@ -14,7 +14,15 @@
 }
 
 .spoiler .title[clicked] {
-	opacity: 0.5;
+	opacity: 0.8;
+}
+
+.spoiler .title:before {
+    padding-right: 0.5em;
+    content: "\25BC";
+}
+.spoiler .title[clicked]:before {
+    content: "\25B2";
 }
 
 .spoiler .content {