diff --git a/src/app/@theme/layouts/one-column/one-column.layout.scss b/src/app/@theme/layouts/one-column/one-column.layout.scss
index f609a1e2..f739f708 100644
--- a/src/app/@theme/layouts/one-column/one-column.layout.scss
+++ b/src/app/@theme/layouts/one-column/one-column.layout.scss
@@ -36,10 +36,6 @@
       .scrollable {
         width: $sidebar-width;
       }
-
-      @include nb-for-theme(cosmic) {
-        background: nb-theme(layout-bg);
-      }
     }
   }
 }
diff --git a/src/app/@theme/layouts/three-columns/three-columns.layout.scss b/src/app/@theme/layouts/three-columns/three-columns.layout.scss
index 68ca890e..4cf3bc9c 100644
--- a/src/app/@theme/layouts/three-columns/three-columns.layout.scss
+++ b/src/app/@theme/layouts/three-columns/three-columns.layout.scss
@@ -36,10 +36,6 @@
       .scrollable {
         width: $sidebar-width;
       }
-
-      @include nb-for-theme(cosmic) {
-        background: nb-theme(layout-bg);
-      }
     }
   }
 
@@ -47,31 +43,11 @@
 
     margin-top: nb-theme(sidebar-header-gap);
 
-    @include nb-for-theme(corporate) {
-      margin-top: 0;
-    }
-
     ::ng-deep .main-container {
       height:
         calc(#{nb-theme(sidebar-height)} - #{nb-theme(header-height)} - #{nb-theme(sidebar-header-gap)}) !important;
       @include nb-ltr(border-top-right-radius, nb-theme(radius));
       @include nb-rtl(border-top-left-radius, nb-theme(radius));
-
-      @include nb-for-theme(corporate) {
-        border: 1px solid nb-theme(separator);
-        height:
-          calc(#{nb-theme(sidebar-height)} - #{nb-theme(header-height)}) !important;
-      }
-    }
-
-    ::ng-deep .scrollable {
-      @include nb-for-theme(corporate) {
-        padding-top: 0;
-
-        .menu-item:first-child {
-          border-top: none;
-        }
-      }
     }
 
     ::ng-deep nb-sidebar-header {
@@ -87,10 +63,6 @@
       font-weight: bold;
       transition: padding 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.48);
 
-      @include nb-for-theme(corporate) {
-        border-radius: nb-theme(radius);
-      }
-
       i {
         font-size: 2rem;
         text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
diff --git a/src/app/@theme/layouts/two-columns/two-columns.layout.scss b/src/app/@theme/layouts/two-columns/two-columns.layout.scss
index a8a36ebe..4cf3bc9c 100644
--- a/src/app/@theme/layouts/two-columns/two-columns.layout.scss
+++ b/src/app/@theme/layouts/two-columns/two-columns.layout.scss
@@ -36,10 +36,6 @@
       .scrollable {
         width: $sidebar-width;
       }
-
-      @include nb-for-theme(cosmic) {
-        background: nb-theme(layout-bg);
-      }
     }
   }
 
@@ -47,32 +43,11 @@
 
     margin-top: nb-theme(sidebar-header-gap);
 
-    @include nb-for-theme(corporate) {
-      margin-top: 0;
-    }
-
     ::ng-deep .main-container {
       height:
         calc(#{nb-theme(sidebar-height)} - #{nb-theme(header-height)} - #{nb-theme(sidebar-header-gap)}) !important;
       @include nb-ltr(border-top-right-radius, nb-theme(radius));
       @include nb-rtl(border-top-left-radius, nb-theme(radius));
-
-      @include nb-for-theme(corporate) {
-        border: 1px solid nb-theme(separator);
-        height:
-          calc(#{nb-theme(sidebar-height)} - #{nb-theme(header-height)}) !important;
-
-      }
-    }
-
-    ::ng-deep .scrollable {
-      @include nb-for-theme(corporate) {
-        padding-top: 0;
-
-        .menu-item:first-child {
-          border-top: none;
-        }
-      }
     }
 
     ::ng-deep nb-sidebar-header {
@@ -88,10 +63,6 @@
       font-weight: bold;
       transition: padding 0.3s cubic-bezier(0.18, 0.89, 0.32, 1.48);
 
-      @include nb-for-theme(corporate) {
-        border-radius: nb-theme(radius);
-      }
-
       i {
         font-size: 2rem;
         text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);