Appears the focus on the theme toggle button

Author: arbirali

tutorindigo/templates/indigo/lms/static/sass/extra/_header.scss

@@ -215,6 +215,13 @@ header.global-header {
                 opacity: 0;
                 width: 0;
                 height: 0;
+
+              &:focus {
+                ~ .slider {
+                  outline: 2px solid $primary;
+                  outline-offset: 1px;
+                }
+              }
             }
 
             /* The slider */
@@ -331,6 +338,13 @@ body.indigo-dark-theme {
         }
         #toggle-switch {
             .switch {
+                input {
+                  &:focus {
+                    ~ .slider {
+                      outline-color: $primary-d;
+                    }
+                  }
+                }
                 /* The slider */
                 .slider {
                     background-color: #ccc;