diff --git a/style/shiny/single.css b/style/shiny/single.css
index 6fe8516..1c0b1bd 100644
--- a/style/shiny/single.css
+++ b/style/shiny/single.css
@@ -93,6 +93,19 @@ body {
   background: white;
 }
 
+.alts .nsfw label::after {
+  content: url(../18_plus_white.svg);
+  transform: rotate(15deg);
+  display: inline-block;
+  height: 0.9em; width: 0.9em;
+  vertical-align: -0.07em;
+  padding-left: 0.25em;
+}
+
+.alts .nsfw :checked + label::after {
+  content: url(../18_plus.svg);
+}
+
 .alts a, .tags a, .links a {
   text-decoration: none;
 }