conference_main/static/conference_main/styles/_schedule.sass

@@ -216,9 +216,8 @@ body.is-scrolled
 
   .row-rulers-lg
     @include media-breakpoint-up(lg)
+      border-top: var(--border-width) solid rgba(black, .05)
       +padding(3, y)
-      // TODO: revise border top height
-      border-top: calc(var(--border-width) * 2) solid rgba(black, .05)
 
   .col-rulers
     +padding(3, x)