diff --git a/static/css/theme.css b/static/css/theme.css
index 20e0c67af1..ca3d0843a0 100644
--- a/static/css/theme.css
+++ b/static/css/theme.css
@@ -367,6 +367,7 @@ html[dir="rtl"] #sidebar ul li .read-icon {
     margin-left: auto;
     margin-right: auto;
     max-width: calc( 81.25rem - 18.75rem - 2 * 3.25rem );
+    width: 100%;
 }
 body:not(.print) #body .narrow .flex-block-wrapper {
     max-width: calc( 81.25rem - 18.75rem - 2 * 9.75rem );
@@ -375,11 +376,9 @@ body:not(.print) #body .narrow .flex-block-wrapper {
 /* we limit width if we have large screens */
 @media screen and ( min-width: 81.25rem ){ /* #sidebar/width + ./max-width */
     #body .flex-block-wrapper {
-        min-width: calc( 81.25rem - 18.75rem - 2 * 3.25rem );
         width: calc( 81.25rem - 18.75rem - 2 * 3.25rem );
     }
     body:not(.print) #body .narrow .flex-block-wrapper {
-        min-width: calc( 81.25rem - 18.75rem - 2 * 9.75rem );
         width: calc( 81.25rem - 18.75rem - 2 * 9.75rem );
     }
 }