diff --git a/app/assets/stylesheets/application.css b/app/assets/stylesheets/application.css
index 6ea15b53a..6041dccc8 100644
--- a/app/assets/stylesheets/application.css
+++ b/app/assets/stylesheets/application.css
@@ -612,8 +612,8 @@ div.square {
 .contextual input, .contextual select {font-size:0.9em;}
 
 .splitcontent {overflow: auto; display: flex; flex-wrap: wrap;}
-.splitcontentleft {flex: 1; margin-right: 5px;}
-.splitcontentright {flex: 1; margin-left: 5px;}
+.splitcontentleft {flex: 1; margin-inline-end: 5px;}
+.splitcontentright {flex: 1; margin-inline-start: 5px;}
 .splitcontenttop {flex: 2; flex-basis: 100%;}
 
 form {display: inline;}
@@ -946,7 +946,7 @@ table.projects td.name .my-project svg {
 #notified-projects>ul, #tracker_project_ids>ul, #custom_field_project_ids>ul {max-height:250px; overflow-y:auto;}
 
 ul.subprojects {list-style: none; display: inline-block; padding: 0; margin: 0;}
-ul.subprojects li {float: left;}
+ul.subprojects li {float: inline-start;}
 ul.subprojects li:not(:last-child)::after {content: ', '; white-space: pre;}
 
 #related-issues li img {vertical-align:middle;}
diff --git a/app/assets/stylesheets/rtl.css b/app/assets/stylesheets/rtl.css
index df7c80ef7..78470a354 100644
--- a/app/assets/stylesheets/rtl.css
+++ b/app/assets/stylesheets/rtl.css
@@ -123,20 +123,12 @@ table.messages td.last_message {text-align:right;}
 
 h3.version {padding-left:0px; padding-right:20px;}
 
-div.issues h3 {padding-left:0px; padding-right:20px;}
-div.members h3 {padding-left:0px; padding-right:20px;}
-div.news h3 {padding-left:0px; padding-right:20px;}
-div.projects h3 {padding-left:0px; padding-right:20px;}
-
 #watchers li {margin: 0px 0px 0px 2px; padding: 0px 0px 0px 0px;}
 #watchers img.gravatar {margin: 0 0 2px 4px;}
 
 div.square {float:right;}
 .contextual {float:left; padding-left:0px; padding-right:10px;}
 
-.splitcontentleft{float:right;}
-.splitcontentright{float:left;}
-
 blockquote {border-left:0px solid var(--oc-gray-3); padding-left:0em; margin-left:2em;  border-right:3px solid var(--oc-gray-3); padding-right:0.6em; margin-right:0;}
 blockquote blockquote { margin-right:0;}