Added constant to sidebar width.

Signed-off-by: gabrielucido <gabrielucido@gmail.com>

plugins/techdocs/src/reader/transformers/styles/rules/layout.ts

@@ -16,6 +16,8 @@
 
 import { RuleOptions } from './types';
 
+const SIDEBAR_WIDTH = '224px';
+
 export default ({ theme, sidebar }: RuleOptions) => `
 /*==================  Layout  ==================*/
 
@@ -169,7 +171,9 @@ export default ({ theme, sidebar }: RuleOptions) => `
     width: 12.1rem !important;
     z-index: 200;
     left: ${
-      sidebar.isPinned ? 'calc(-12.1rem + 224px)' : 'calc(-12.1rem + 72px)'
+      sidebar.isPinned
+        ? `calc(-12.1rem + ${SIDEBAR_WIDTH})`
+        : 'calc(-12.1rem + 72px)'
     } !important;
   }
   .md-sidebar--secondary:not([hidden]) {