diff --git a/app/assets/stylesheets/application.scss b/app/assets/stylesheets/application.scss
index a9bdb997..8846b368 100644
--- a/app/assets/stylesheets/application.scss
+++ b/app/assets/stylesheets/application.scss
@@ -599,3 +599,32 @@ $bezier: cubic-bezier(0.75, 0, 0.25, 1);
 hr {
   border-bottom: 1px solid #dee2e6;
 }
+
+details {
+	summary {
+		.show-when-open {
+			display: none;
+		}
+
+		.hide-when-open {
+			display: block;
+		}
+	}
+
+	&[open] {
+		summary {
+			.show-when-open {
+				display: block;
+			}
+
+			.hide-when-open {
+				display: none;
+			}
+		}
+	}
+
+	& > summary {
+		list-style: none;
+		&::-webkit-details-marker { display: none; }
+	}
+}