diff --git a/src/components/modules/ui.ts b/src/components/modules/ui.ts
index d8dc37989..603ca9e7f 100644
--- a/src/components/modules/ui.ts
+++ b/src/components/modules/ui.ts
@@ -49,12 +49,11 @@ export default class UI extends Module<UINodes> {
    * @returns {{editorWrapper: string, editorZone: string}}
    */
   public get CSS(): {
-    editorWrapper: string; editorWrapperNarrow: string; editorZone: string; editorZoneHidden: string;
+    editorWrapper: string; editorZone: string; editorZoneHidden: string;
     editorEmpty: string; editorRtlFix: string;
     } {
     return {
       editorWrapper: 'codex-editor',
-      editorWrapperNarrow: 'codex-editor--narrow',
       editorZone: 'codex-editor__redactor',
       editorZoneHidden: 'codex-editor__redactor--hidden',
       editorEmpty: 'codex-editor--empty',
@@ -290,15 +289,6 @@ export default class UI extends Module<UINodes> {
     ]);
     this.nodes.redactor = $.make('div', this.CSS.editorZone);
 
-    /**
-     * If Editor has injected into the narrow container, enable Narrow Mode
-     *
-     * @todo Forced layout. Get rid of this feature
-     */
-    if (this.nodes.holder.offsetWidth < this.contentRect.width) {
-      this.nodes.wrapper.classList.add(this.CSS.editorWrapperNarrow);
-    }
-
     /**
      * Set customizable bottom zone height
      */
diff --git a/src/styles/block.css b/src/styles/block.css
index d4288aae6..6921cb52c 100644
--- a/src/styles/block.css
+++ b/src/styles/block.css
@@ -35,6 +35,11 @@
 
   &--stretched &__content {
     max-width: none;
+
+    @media (--not-mobile) {
+      width: max(0px, calc(100% - var(--toolbar-actions-space)));
+      margin-left: var(--toolbar-actions-space);
+    }
   }
 
   &__content {
@@ -42,6 +47,19 @@
     max-width: var(--content-width);
     margin: 0 auto;
     transition: background-color 150ms ease;
+
+    @media (--not-mobile) {
+      width: min(
+        var(--content-width),
+        max(0px, calc(100% - var(--toolbar-actions-space)))
+      );
+      max-width: none;
+      margin-left: max(
+        var(--toolbar-actions-space),
+        calc((100% - var(--content-width)) / 2)
+      );
+      margin-right: 0;
+    }
   }
 
   &--drop-target &__content {
diff --git a/src/styles/rtl.css b/src/styles/rtl.css
index f65cce74a..060693313 100644
--- a/src/styles/rtl.css
+++ b/src/styles/rtl.css
@@ -13,10 +13,9 @@
     }
 
     &__actions {
-      right: auto;
-      left: calc(var(--toolbox-buttons-size) * -1);
-
       @media (--mobile){
+        right: auto;
+        left: calc(var(--toolbox-buttons-size) * -1);
         margin-left: 0;
         margin-right: auto;
         padding-right: 0;
@@ -64,19 +63,31 @@
 
 }
 
-.codex-editor--narrow.codex-editor--rtl {
-  .ce-toolbar__plus {
-    @media (--not-mobile) {
-      left: 0px;
-      right: 5px;
+@media (--not-mobile) {
+  .codex-editor.codex-editor--rtl {
+    .ce-block__content,
+    .ce-toolbar__content {
+      margin-left: 0;
+      margin-right: max(
+        var(--toolbar-actions-space),
+        calc((100% - var(--content-width)) / 2)
+      );
     }
-  }
 
-  .ce-toolbar__actions {
-    @media (--not-mobile) {
-      left: -5px;
+    .ce-block--stretched .ce-block__content {
+      margin-right: var(--toolbar-actions-space);
     }
-  }
-}
 
+    .ce-toolbar__actions {
+      right: auto;
+      left: 100%;
+      padding-right: 0;
+      padding-left: 5px;
+    }
 
+    .ce-toolbar__settings-btn {
+      margin-left: 0;
+      margin-right: 3px;
+    }
+  }
+}
diff --git a/src/styles/toolbar.css b/src/styles/toolbar.css
index 0358eab5b..1d337893d 100644
--- a/src/styles/toolbar.css
+++ b/src/styles/toolbar.css
@@ -16,6 +16,19 @@
     max-width: var(--content-width);
     margin: 0 auto;
     position: relative;
+
+    @media (--not-mobile) {
+      width: min(
+        var(--content-width),
+        max(0px, calc(100% - var(--toolbar-actions-space)))
+      );
+      max-width: none;
+      margin-left: max(
+        var(--toolbar-actions-space),
+        calc((100% - var(--content-width)) / 2)
+      );
+      margin-right: 0;
+    }
   }
 
   &__plus {
@@ -52,6 +65,11 @@
     @media (--mobile){
       right: auto;
     }
+
+    @media (--not-mobile){
+      width: var(--toolbar-actions-space);
+      box-sizing: border-box;
+    }
   }
 
   &__settings-btn {
@@ -83,12 +101,3 @@
     }
   }
 }
-
-/**
- * Styles for Narrow mode
- */
-.codex-editor--narrow .ce-toolbar__plus {
-  @media (--not-mobile) {
-    left: 5px;
-  }
-}
diff --git a/src/styles/toolbox.css b/src/styles/toolbox.css
index e0c548308..4abea4567 100644
--- a/src/styles/toolbox.css
+++ b/src/styles/toolbox.css
@@ -1,12 +1,3 @@
 .ce-toolbox {
 
 }
-
-.codex-editor--narrow .ce-toolbox {
-  @media (--not-mobile){
-    .ce-popover {
-      right: 0;
-      left: unset;
-    }
-  }
-}
diff --git a/src/styles/ui.css b/src/styles/ui.css
index d84237b5c..a01f03ad6 100644
--- a/src/styles/ui.css
+++ b/src/styles/ui.css
@@ -20,28 +20,6 @@
     }
   }
 
-  /**
-   * Styles for narrow holder
-   */
-  &--narrow &__redactor {
-    @media (--not-mobile) {
-      margin-right: var(--narrow-mode-right-padding);
-    }
-  }
-
-  &--narrow&--rtl &__redactor {
-    @media (--not-mobile) {
-      margin-left: var(--narrow-mode-right-padding);
-      margin-right: 0;
-    }
-  }
-
-  &--narrow .ce-toolbar__actions {
-    @media (--not-mobile) {
-      right: -5px;
-    }
-  }
-
   &-copyable {
     position: absolute;
     height: 1px;
@@ -91,7 +69,6 @@
   }
 }
 
-
 .codex-editor--toolbox-opened [contentEditable=true][data-placeholder]:focus::before {
   opacity: 0 !important;
 }
diff --git a/src/styles/variables.css b/src/styles/variables.css
index 61d8ab2b3..ff2bdc378 100644
--- a/src/styles/variables.css
+++ b/src/styles/variables.css
@@ -45,9 +45,9 @@
   --content-width: 650px;
 
   /**
-   * In narrow mode, we increase right zone contained Block Actions button
+   * Width reserved for Block Actions beside editor content
    */
-  --narrow-mode-right-padding: 50px;
+  --toolbar-actions-space: 58px;
 
   /**
    * Toolbar Plus Button and Toolbox buttons height and width
diff --git a/test/cypress/tests/modules/Ui.cy.ts b/test/cypress/tests/modules/Ui.cy.ts
index eaf2246a8..fbd769aae 100644
--- a/test/cypress/tests/modules/Ui.cy.ts
+++ b/test/cypress/tests/modules/Ui.cy.ts
@@ -2,6 +2,140 @@ import { createEditorWithTextBlocks } from '../../support/utils/createEditorWith
 import type EditorJS from '../../../../types/index';
 
 describe('Ui module', function () {
+  describe('responsive layout', function () {
+    it('should not read holder width during initialization', function () {
+      cy.window()
+        .then(async (window) => {
+          const holder = window.document.createElement('div');
+          let holderWidthRead = false;
+
+          holder.id = 'editorjs';
+          Object.defineProperty(holder, 'offsetWidth', {
+            configurable: true,
+            get: () => {
+              holderWidthRead = true;
+
+              return 700;
+            },
+          });
+          window.document.body.appendChild(holder);
+
+          const editor = new window.EditorJS({
+            holder,
+          });
+
+          await editor.isReady;
+
+          expect(holderWidthRead).to.be.false;
+
+          editor.destroy();
+        });
+    });
+
+    it('should keep the plus button left of the content in a thin holder on a wide screen', function () {
+      cy.viewport(1000, 800);
+      cy.createEditor();
+
+      cy.get('[data-cy=editorjs]')
+        .invoke('css', 'width', '500px')
+        .find('.ce-paragraph')
+        .click();
+
+      cy.get('[data-cy=editorjs]')
+        .then(($holder) => {
+          const holderRect = $holder[0].getBoundingClientRect();
+          const holderContentLeft = holderRect.left + $holder[0].clientLeft;
+          const plusButtonRect = $holder.find('.ce-toolbar__plus')[0].getBoundingClientRect();
+          const blockContentRect = $holder.find('.ce-block__content')[0].getBoundingClientRect();
+
+          expect(plusButtonRect.width).to.be.greaterThan(0);
+          expect(plusButtonRect.left).to.equal(holderContentLeft);
+          expect(plusButtonRect.right).to.be.at.most(blockContentRect.left);
+        });
+    });
+
+    it('should preserve the mobile toolbar and toolbox layout', function () {
+      cy.viewport(375, 667);
+      cy.createEditor();
+
+      cy.get('[data-cy=editorjs]')
+        .find('.ce-paragraph')
+        .click();
+
+      cy.get('[data-cy=editorjs]')
+        .then(($holder) => {
+          const holderRect = $holder[0].getBoundingClientRect();
+          const plusButtonRect = $holder.find('.ce-toolbar__plus')[0].getBoundingClientRect();
+
+          expect(plusButtonRect.left).to.be.at.least(holderRect.left);
+          expect(plusButtonRect.right).to.be.at.most(holderRect.right);
+        })
+        .find('.ce-toolbar__plus')
+        .click();
+
+      cy.get('[data-cy=toolbox]')
+        .find('.ce-popover__container')
+        .should('be.visible')
+        .should(($popover) => {
+          const popoverRect = $popover[0].getBoundingClientRect();
+          const viewport = $popover[0].ownerDocument.defaultView;
+
+          expect(viewport).not.to.be.null;
+          expect(popoverRect.left).to.be.at.least(0);
+          expect(popoverRect.right).to.be.at.most(viewport?.innerWidth);
+          expect(popoverRect.top).to.be.at.least(0);
+          expect(popoverRect.bottom).to.be.at.most(viewport?.innerHeight);
+        });
+    });
+
+    it('should mirror the responsive toolbar in a thin RTL holder', function () {
+      cy.viewport(1000, 800);
+      cy.createEditor({
+        i18n: {
+          direction: 'rtl',
+        },
+      });
+
+      cy.get('[data-cy=editorjs]')
+        .invoke('css', 'width', '500px')
+        .find('.ce-paragraph')
+        .click();
+
+      cy.get('[data-cy=editorjs]')
+        .then(($holder) => {
+          const holder = $holder[0];
+          const holderRect = holder.getBoundingClientRect();
+          const holderRightBorder = holder.offsetWidth - holder.clientWidth - holder.clientLeft;
+          const holderContentRight = holderRect.right - holderRightBorder;
+          const plusButtonRect = $holder.find('.ce-toolbar__plus')[0].getBoundingClientRect();
+          const blockContentRect = $holder.find('.ce-block__content')[0].getBoundingClientRect();
+
+          expect(plusButtonRect.right).to.equal(holderContentRight);
+          expect(plusButtonRect.left).to.be.at.least(blockContentRect.right);
+        });
+    });
+
+    it('should keep the rectangle selection overlay fixed to the viewport', function () {
+      cy.viewport(1000, 800);
+      cy.createEditor();
+
+      cy.get('[data-cy=editorjs]')
+        .invoke('css', {
+          marginLeft: '40px',
+          width: '500px',
+        })
+        .find('.codex-editor-overlay')
+        .then(($overlay) => {
+          const overlayRect = $overlay[0].getBoundingClientRect();
+
+          expect(overlayRect.left).to.equal(0);
+          expect(overlayRect.top).to.equal(0);
+          expect(overlayRect.right).to.equal(1000);
+          expect(overlayRect.bottom).to.equal(800);
+        });
+    });
+  });
+
   describe('documentKeydown', function () {
     describe('Backspace', function () {
       it('should remove selected blocks', function () {