diff --git a/packages/core/src/components/nav/nav.scss b/packages/core/src/components/nav/nav.scss
index c0fe7d406f..113a2bf48f 100644
--- a/packages/core/src/components/nav/nav.scss
+++ b/packages/core/src/components/nav/nav.scss
@@ -2,6 +2,19 @@
 // --------------------------------------------------
 @import "../../themes/util";
 
+
 ion-nav {
-  @extend .ion-page
+  position: absolute;
+
+  top: 0;
+  right: 0;
+  bottom: 0;
+  left: 0;
+
+  z-index: $z-index-page-container;
+
+  width: 100%;
+  height: 100%;
+
+  contain: layout size style;
 }
\ No newline at end of file
diff --git a/packages/core/src/components/page/page.scss b/packages/core/src/components/page/page.scss
index 8c4babdc97..fe0f87dd20 100644
--- a/packages/core/src/components/page/page.scss
+++ b/packages/core/src/components/page/page.scss
@@ -2,7 +2,20 @@
 // --------------------------------------------------
 @import "../../themes/util";
 
+
 ion-page {
-  @extend .ion-page
+  position: absolute;
+
+  top: 0;
+  right: 0;
+  bottom: 0;
+  left: 0;
+
+  z-index: $z-index-page-container;
+
+  width: 100%;
+  height: 100%;
+
+  contain: layout size style;
 }
 
diff --git a/packages/core/src/components/tabs/tabs.scss b/packages/core/src/components/tabs/tabs.scss
index 40e0a5920d..508b7de7ad 100644
--- a/packages/core/src/components/tabs/tabs.scss
+++ b/packages/core/src/components/tabs/tabs.scss
@@ -8,9 +8,23 @@
 // --------------------------------------------------
 
 ion-tabs {
+  position: absolute;
+
+  top: 0;
+  right: 0;
+  bottom: 0;
+  left: 0;
+
+  z-index: $z-index-page-container;
+
   display: flex;
 
   flex-direction: column;
+
+  width: 100%;
+  height: 100%;
+
+  contain: layout size style;
 }
 
 .tabs-inner {
@@ -65,6 +79,7 @@ ion-tabbar.placement-top {
 }
 
 ion-tab-button {
+  box-sizing: border-box;
   @include margin(0);
   @include text-align(center);
   @include border-radius(0);
@@ -219,12 +234,3 @@ ion-tabbar.scrollable .scroll-inner {
 ion-tabbar.scrollable ion-button.inactive {
   visibility: hidden;
 }
-
-
-ion-tabs {
-  @extend .ion-page
-}
-
-ion-tab-button {
-  box-sizing: border-box;
-}
diff --git a/packages/core/src/themes/ionic.globals.scss b/packages/core/src/themes/ionic.globals.scss
index f596ff4ef2..fbda7510d7 100644
--- a/packages/core/src/themes/ionic.globals.scss
+++ b/packages/core/src/themes/ionic.globals.scss
@@ -47,19 +47,3 @@ $z-index-item-options:           1; // scss-lint:disable DefaultRule
 $z-index-item-divider:           100; // scss-lint:disable DefaultRule
 
 $z-index-reorder-selected:       100; // scss-lint:disable DefaultRule
-
-.ion-page {
-  position: absolute;
-
-  top: 0;
-  left: 0;
-  right: 0;
-  bottom: 0;
-
-  z-index: $z-index-page-container;
-
-  width: 100%;
-  height: 100%;
-
-  contain: layout size style;
-}
\ No newline at end of file