diff --git a/core/themes/seven/css/components/system-status-counter.css b/core/themes/seven/css/components/system-status-counter.css
index 570c792..04d3209 100644
--- a/core/themes/seven/css/components/system-status-counter.css
+++ b/core/themes/seven/css/components/system-status-counter.css
@@ -13,11 +13,13 @@
 .system-status-counter__status-icon {
   display: inline-block;
   height: 45px;
+  width: 2.815rem;
   width: 45px;
+  width: 2.815rem;
   vertical-align: middle;
   border-right: 1px solid #e6e4df; /* LTR */
   border-left: 0; /* LTR */
-  background-color: #FAF9F5;
+  background-color: #faf9f5;
   box-shadow: 0 1px 1px rgba(0, 0, 0, .1) inset;
 }
 [dir="rtl"] .system-status-counter__status-icon {
@@ -28,6 +30,7 @@
 .system-status-counter__status-icon:before {
   content: "";
   background-size: 25px;
+  background-size: 1.5625rem;
   background-position: 50% center;
   background-repeat: no-repeat;
   width: 100%;
@@ -51,6 +54,7 @@
   text-transform: uppercase;
   padding: 0 6px;
   font-size: 16px;
+  font-size: 1rem;
   line-height: 1em;
   font-weight: bold;
 }
@@ -64,24 +68,30 @@
   .system-status-counter__status-icon,
   .system-status-counter  {
     height: 85px;
+    height: 5.3125rem;
   }
   .system-status-counter__status-icon {
     width: 85px;
+    width: 5.3125rem;
   }
   .system-status-counter__status-title {
     font-size: 20px;
+    font-size: 1.25rem;
     padding: 10px 3%;
   }
   .toolbar-vertical.toolbar-tray-open .system-status-counter__status-title {
     font-size: 16px;
+    font-size: 1rem;
   }
   .system-status-counter__status-icon:before {
     background-size: 35px;
+    background-size: 2.1875rem;
   }
 }

 @media screen and (min-width: 76em) {
   .toolbar-vertical.toolbar-tray-open .system-status-counter__status-title {
     font-size: 20px;
+    font-size: 1.25rem;
   }
-}
\ No newline at end of file
+}
diff --git a/core/themes/seven/css/components/system-status-report.css b/core/themes/seven/css/components/system-status-report.css
index 36bde7a..9e4a9c7 100644
--- a/core/themes/seven/css/components/system-status-report.css
+++ b/core/themes/seven/css/components/system-status-report.css
@@ -7,7 +7,7 @@
   border: 1px solid #ccc;
 }
 .system-status-general-info__header {
-  background-color: #F5F5F2;
+  background-color: #f5f5f2;
   padding: 10px;
   margin: 0;
   overflow: hidden;
@@ -57,9 +57,13 @@
   box-sizing: border-box;
   display: inline-block;
   width: calc(100% - 60px);
-  padding-left: 10px;
+  padding-left: 10px; /* LTR */
   position: relative;
 }
+[dir="rtl"] .system-status-general-info__item-details {
+  padding-right: 10px;
+  padding-left: 0;
+}
 .system-status-general-info__item-title {
   margin-bottom: 0;
 }
@@ -84,7 +88,7 @@
   .system-status-general-info__item:nth-child(2),
   .system-status-general-info__item:nth-child(4),
   .system-status-general-info__item:nth-child(5) {
-    border-left: 1px solid #ccc;
+    border-left: 1px solid #ccc; /* LTR */
   }
   [dir="rtl"] .system-status-general-info__item:nth-child(1),
   [dir="rtl"] .system-status-general-info__item:nth-child(3) {
@@ -97,7 +101,7 @@
   .system-status-general-info__run-cron {
     position: absolute;
     top: 1em;
-    right: 1em;
+    right: 1em; /* LTR */
     margin-top: 0;
   }
   [dir="rtl"] .system-status-general-info__run-cron {
@@ -129,7 +133,7 @@
 /* Account for native and poly-filled details element */
 .system-status-report__status-title {
   position: relative;
-  padding: 1em 1em 1em 3em;
+  padding: 1em 1em 1em 3em; /* LTR */
   box-sizing: border-box;
 }
 .system-status-report__status-title .details-title {
@@ -140,7 +144,7 @@ html:not(.details) .system-status-report__status-title {
   padding-left: 0;
 }
 .system-status-report__status-title .details-title {
-  padding-left: 3em;
+  padding-left: 3em; /* LTR */
 }
 [dir="rtl"] .system-status-report__status-title .details-title {
   padding-right: 3em;
@@ -150,10 +154,10 @@ html:not(.details) .system-status-report__status-title {
   padding: 1em 3em 1em 1em;
 }
 .collapse-processed > .system-status-report__status-title:before {
-  float: right;
+  float: right; /* LTR */
 }
 .system-status-report__status-title::-webkit-details-marker {
-  float: right;
+  float: right; /* LTR */
 }
 [dir="rtl"] .collapse-processed > .system-status-report__status-title:before {
   float: left;
@@ -177,16 +181,17 @@ html:not(.details) .system-status-report__status-title {
   height: 16px;
   width: 16px;
   position: absolute;
-  left: 10px;
+  left: 10px; /* LTR */
   top: 1em;
   display: inline-block;
   vertical-align: top;
-  margin-right: 10px;
+  margin-right: 10px; /* LTR */
 }
 [dir="rtl"] .system-status-report__status-title .details-title:before,
 [dir="rtl"].details .system-status-report__status-title:before {
   left: auto;
   right: 10px;
+  margin-right: 0;
 }
 .system-status-report__status-icon--error .details-title:before,
 .details .system-status-report__status-icon--error:before {
@@ -199,7 +204,7 @@ html:not(.details) .system-status-report__status-title {

 .system-status-report__entry__value {
   box-sizing: border-box;
-  padding: 0 1em 1em 3em;
+  padding: 0 1em 1em 3em; /* LTR */
 }
 [dir="rtl"] .system-status-report__entry__value {
   padding-right: 3em;
@@ -220,7 +225,10 @@ html:not(.details) .system-status-report__status-title {
   }
   .system-status-report details > summary:first-child {
     width: 35ch;
-    float: left;
+    float: left; /* LTR */
+  }
+  [dir="rtl"] .system-status-report details > summary:first-child {
+    float: right;
   }
   .collapse-processed > .system-status-report__status-title:before {
     display: none;
@@ -232,7 +240,7 @@ html:not(.details) .system-status-report__status-title {
     width: calc(100% - 35ch - 1em);
     float: right;
     display: block;
-    padding-left: 0;
+    padding-left: 0; /* LTR */
     padding-top: 1em;
   }
   [dir="rtl"] .system-status-report__entry__value {
diff --git a/core/themes/seven/css/components/system.admin.css b/core/themes/seven/css/components/system.admin.css
index e6d57ae..8233c05 100644
--- a/core/themes/seven/css/components/system.admin.css
+++ b/core/themes/seven/css/components/system.admin.css
@@ -20,7 +20,7 @@
     margin: 0 2.5em;
   }
   .layout-column {
-    float: left;  /* LTR */
+    float: left; /* LTR */
     box-sizing: border-box;
   }
   [dir="rtl"] .layout-column {
@@ -117,7 +117,7 @@ small .admin-link:after {
   text-transform: none;
 }
 .system-modules td details a {
-  color: #5C5C5B;
+  color: #5c5c5b;
   border: 0px;
 }
 .system-modules td details {