diff --git a/lib/core/form/components/widgets/form.scss b/lib/core/form/components/widgets/form.scss
index 9ab61dd306f..70692a4726e 100644
--- a/lib/core/form/components/widgets/form.scss
+++ b/lib/core/form/components/widgets/form.scss
@@ -1,5 +1,3 @@
-@import '~@angular/material/theming';
-
 @mixin adf-form-theme($theme) {
     $primary: map-get($theme, primary);
     $accent: map-get($theme, accent);
diff --git a/lib/core/layout/components/header/header.component.scss b/lib/core/layout/components/header/header.component.scss
index 5ca2429320f..94470f2fdcd 100644
--- a/lib/core/layout/components/header/header.component.scss
+++ b/lib/core/layout/components/header/header.component.scss
@@ -1,5 +1,3 @@
-@import '~@angular/material/theming';
-
 @mixin  adf-header-layout-theme($theme) {
     $primary: map-get($theme, primary);
     $accent: map-get($theme, accent);
diff --git a/lib/core/styles/snackbar.scss b/lib/core/styles/snackbar.scss
index 53fdf41c3fd..cc98a1b8e0e 100644
--- a/lib/core/styles/snackbar.scss
+++ b/lib/core/styles/snackbar.scss
@@ -1,5 +1,3 @@
-@import '~@angular/material/theming';
-
 @mixin adf-snackbar-theme($theme) {
     $warn: map-get($theme, warn);
     $accent: map-get($theme, accent);
diff --git a/lib/core/viewer/components/pdf-viewer-password-dialog.scss b/lib/core/viewer/components/pdf-viewer-password-dialog.scss
index b6afe8e89c5..a9870fd5623 100644
--- a/lib/core/viewer/components/pdf-viewer-password-dialog.scss
+++ b/lib/core/viewer/components/pdf-viewer-password-dialog.scss
@@ -1,14 +1,11 @@
-@import '~@angular/material/theming';
-
-.adf-fill-remaining-space {
-    flex: 1 1 auto;
-}
-
-.adf-full-width {
-    width: 100%;
-}
-
 @mixin adf-dialog-theme($theme) {
+    .adf-fill-remaining-space {
+        flex: 1 1 auto;
+    }
+
+    .adf-full-width {
+        width: 100%;
+    }
 
     $primary: map-get($theme, primary);
 
@@ -19,5 +16,4 @@
     .adf-dialog-action-button:enabled {
         color: mat-color($primary);
     }
-
 }