diff --git a/static/sass/_blog.sass b/static/sass/_blog.sass
index 29272f0..dba5978 100644
--- a/static/sass/_blog.sass
+++ b/static/sass/_blog.sass
@@ -52,3 +52,20 @@ kbd
   text-shadow: 0 1px 0 #fff
   line-height: 1.4
   white-space: nowrap
+
+
+// Spoiler tag
+
+img.spoiler // Images
+  filter: blur(25px);
+  transition-property: -webkit-filter;
+  transition-duration: .2s;
+
+
+div.spoiler, span.spoiler, section.spoiler // Text
+  filter: blur(5px)
+  transition-property: -webkit-filter
+  transition-duration: .2s
+
+.spoiler:hover, .spoiler:focus
+  filter: blur(0px);