diff --git a/phpBB/styles/prosilver/theme/bidi.css b/phpBB/styles/prosilver/theme/bidi.css
index 83c048ece8..41520f0164 100644
--- a/phpBB/styles/prosilver/theme/bidi.css
+++ b/phpBB/styles/prosilver/theme/bidi.css
@@ -538,13 +538,13 @@ li.breadcrumbs span:first-child > a {
 	margin: 0.5em 25px 0 1px;
 }
 
+/* Nested quotes */
 .rtl blockquote blockquote {
-	/* Nested quotes */
 	margin: 0.5em 15px 0 1px;
 }
 
+/* Username/source of quoter */
 .rtl blockquote cite {
-	/* Username/source of quoter */
 	margin-left: 0;
 }
 
diff --git a/phpBB/styles/prosilver/theme/colours.css b/phpBB/styles/prosilver/theme/colours.css
index 28ce9f89fc..11090c0e77 100644
--- a/phpBB/styles/prosilver/theme/colours.css
+++ b/phpBB/styles/prosilver/theme/colours.css
@@ -73,6 +73,11 @@ th a:hover {
 	color: #164069;
 }
 
+.signature a,
+.signature a:hover {
+	background-color: transparent;
+}
+
 /* back to top of page */
 .top i {
 	color: #9e9e9e;
@@ -865,13 +870,6 @@ ul.cplist {
 	color: #d41142;
 }
 
-@media only screen and (max-width: 900px), only screen and (max-device-width: 900px) {
-	.navigation a,
-	.rtl .navigation a {
-		background: #aab9c0;
-	}
-}
-
 /* preferences pane layout */
 .panel-container h2 {
 	color: #212121;
diff --git a/phpBB/styles/prosilver/theme/cp.css b/phpBB/styles/prosilver/theme/cp.css
index a36ef877d4..6d197df9c0 100644
--- a/phpBB/styles/prosilver/theme/cp.css
+++ b/phpBB/styles/prosilver/theme/cp.css
@@ -353,47 +353,6 @@ ol.def-rules li {
 	padding: 5px;
 }
 
-/* Responsive *CP navigation
----------------------------------------- */
-
-@media only screen and (max-width: 900px), only screen and (max-device-width: 900px) {
-	.nojs .tabs a span,
-	.nojs .minitabs a span {
-		letter-spacing: -0.5px;
-		text-overflow: ellipsis;
-		overflow: hidden;
-		max-width: 40px;
-	}
-
-	.cp-menu,
-	.navigation,
-	.cp-main {
-		float: none;
-		width: auto;
-		margin: 0;
-	}
-
-	.navigation {
-		max-width: 320px;
-		margin: 0 auto;
-		padding: 0;
-	}
-
-	.navigation a {
-		background-image: none;
-	}
-
-	.navigation li:first-child a {
-		border-top-left-radius: 5px;
-		border-top-right-radius: 5px;
-	}
-
-	.navigation li:last-child a {
-		border-bottom-right-radius: 5px;
-		border-bottom-left-radius: 5px;
-	}
-}
-
 /* stylelint-enable selector-max-compound-selectors */
 /* stylelint-enable selector-no-qualifying-type */
 /* stylelint-enable declaration-property-unit-whitelist */
diff --git a/phpBB/styles/prosilver/theme/icons.css b/phpBB/styles/prosilver/theme/icons.css
index f52637c3ee..18447171f0 100644
--- a/phpBB/styles/prosilver/theme/icons.css
+++ b/phpBB/styles/prosilver/theme/icons.css
@@ -103,4 +103,3 @@ blockquote cite:before,
 .rtl .uncited:before {
 	content: "\f10e"; /* Font Awesome quote-right */
 }
-
diff --git a/phpBB/styles/prosilver/theme/responsive.css b/phpBB/styles/prosilver/theme/responsive.css
index 5d0aa250b4..6355fed984 100644
--- a/phpBB/styles/prosilver/theme/responsive.css
+++ b/phpBB/styles/prosilver/theme/responsive.css
@@ -79,6 +79,10 @@
 		margin-bottom: 5px;
 	}
 
+	.phpbb_alert {
+		top: 25px;
+	}
+
 	.action-bar > div {
 		margin-bottom: 5px;
 	}
@@ -111,6 +115,21 @@
 	.quick-links .dropdown-trigger span {
 		display: none;
 	}
+
+	.rtl dl.details dt,
+	.rtl dl.details dd {
+		text-align: right;
+		float: none;
+	}
+
+	.rtl dl.details dd {
+		margin-right: 20px;
+		margin-left: 0;
+	}
+
+	.rtl .captcha-panel dd.captcha {
+		margin-right: 0;
+	}
 }
 
 @media (max-width: 550px) {
@@ -125,6 +144,18 @@
 	ul.topiclist.forums dd.lastpost {
 		display: none;
 	}
+
+	/* RTL */
+
+	/* .topiclist lists
+	---------------------------------------- */
+	.rtl ul.topiclist.forums dt {
+		margin-left: 0;
+	}
+
+	.rtl ul.topiclist.forums dt .list-inner {
+		margin-left: 0;
+	}
 }
 
 @media (max-width: 700px) {
@@ -600,6 +631,105 @@
 	.attach-comment dfn {
 		width: 100%;
 	}
+
+	/* RTL */
+
+	/* .topiclist lists
+	---------------------------------------- */
+	.rtl ul.topiclist li.header dt,
+	.rtl ul.topiclist li.header dt .list-inner {
+		margin-left: 0 !important;
+		padding-left: 0;
+	}
+
+	.rtl ul.topiclist dt,
+	.rtl ul.topiclist dt .list-inner,
+	.rtl ul.topiclist.missing-column dt,
+	.rtl ul.topiclist.missing-column dt .list-inner,
+	.rtl ul.topiclist.two-long-columns dt,
+	.rtl ul.topiclist.two-long-columns dt .list-inner,
+	.rtl ul.topiclist.two-columns dt,
+	.rtl ul.topiclist.two-columns dt .list-inner {
+		margin-left: 0;
+	}
+
+	.rtl ul.topiclist dt .list-inner.with-mark {
+		padding-left: 34px;
+	}
+
+	/* Forums and topics lists
+	---------------------------------------- */
+	.rtl ul.topiclist.forums dt {
+		margin-left: -250px;
+	}
+
+	.rtl ul.topiclist.forums dt .list-inner {
+		margin-left: 250px;
+	}
+
+	.rtl ul.topiclist dd.mark {
+		text-align: right;
+		right: auto;
+		left: 5px;
+	}
+
+	.rtl table.responsive.show-header thead,
+	.rtl table.responsive.show-header th:first-child {
+		text-align: right !important;
+	}
+
+	.rtl table.responsive td {
+		text-align: right !important;
+	}
+
+	/* User profile
+	---------------------------------------- */
+	.rtl .column1,
+	.rtl .column2,
+	.rtl .left-box.profile-details {
+		float: none;
+	}
+
+	/* Post
+	---------------------------------------- */
+	.rtl .postprofile,
+	.rtl .postbody,
+	.rtl .search .postbody {
+		float: none;
+	}
+
+	.rtl .post .postprofile {
+		border-width: 0 0 1px;
+	}
+
+	.rtl .postprofile dt,
+	.rtl .postprofile dd.profile-rank,
+	.rtl .search .postprofile dd {
+		margin: 0;
+	}
+
+	.rtl .postprofile .avatar {
+		margin-right: 0;
+		margin-left: 5px;
+	}
+
+	.rtl .has-profile .post-buttons {
+		left: 20px;
+	}
+
+	/* Forms
+	---------------------------------------- */
+	.rtl fieldset dt,
+	.rtl fieldset.fields1 dt,
+	.rtl fieldset.fields2 dt {
+		float: none;
+	}
+
+	.rtl fieldset dd,
+	.rtl fieldset.fields1 dd,
+	.rtl fieldset.fields2 dd {
+		margin-right: 20px;
+	}
 }
 
 @media (min-width: 700px) {
@@ -636,6 +766,72 @@
 	}
 }
 
+@media (max-width: 992px) {
+	.row .pagination {
+		text-align: left;
+		float: left;
+		margin-top: 4px;
+		margin-bottom: 4px;
+	}
+}
+
+/* Responsive *CP navigation
+---------------------------------------- */
+@media (max-width: 900px) {
+	.nojs .tabs a span,
+	.nojs .minitabs a span {
+		letter-spacing: -0.5px;
+		text-overflow: ellipsis;
+		overflow: hidden;
+		max-width: 40px;
+	}
+
+	.cp-menu,
+	.navigation,
+	.cp-main {
+		float: none;
+		width: auto;
+		margin: 0;
+	}
+
+	.navigation {
+		max-width: 320px;
+		margin: 0 auto;
+		padding: 0;
+	}
+
+	.navigation a {
+		background-image: none;
+	}
+
+	.navigation li:first-child a {
+		border-top-left-radius: 5px;
+		border-top-right-radius: 5px;
+	}
+
+	.navigation li:last-child a {
+		border-bottom-right-radius: 5px;
+		border-bottom-left-radius: 5px;
+	}
+
+	.rtl .cp-menu,
+	.rtl .navigation,
+	.rtl .cp-main {
+		float: none;
+	}
+
+	.navigation a,
+	.rtl .navigation a {
+		background: #b2c2cf;
+	}
+}
+
+@media (max-width: 1220px) {
+	.wrap {
+		margin: 0 12px;
+	}
+}
+
 /* stylelint-enable selector-max-compound-selectors */
 /* stylelint-enable selector-no-qualifying-type */
 /* stylelint-enable declaration-property-unit-whitelist */