diff --git a/p/themes/base-theme/template.css b/p/themes/base-theme/template.css
index 9b8ad902b..7f2e7e828 100644
--- a/p/themes/base-theme/template.css
+++ b/p/themes/base-theme/template.css
@@ -630,7 +630,8 @@ br + br + br {
 #bigMarkAsRead {
 	display: block;
 	width: 100%;
-	padding: 1em 0;
+	padding: 1em 0 100% 0;
+	padding: 1em 0 100vh 0;
 	text-align: center;
 	font-size: 1.4em;
 }