fix(core): update

ts/dees-element.classes.cssmanager.ts

@@ -1,4 +1,4 @@
-import { CSSResult } from 'lit-element';
+import { CSSResult, unsafeCSS } from 'lit-element';
 import * as plugins from './dees-element.plugins';
 import * as domtools from '@designestate/dees-domtools';
 
@@ -32,6 +32,18 @@ export class CssManager {
     return domtools.elementBasic.staticStyles;
   }
 
+  public cssForTablet(contentArg) {
+    return unsafeCSS(domtools.breakpoints.cssForTablet(contentArg));
+  };
+  
+  public cssForPhablet(contentArg) {
+    return unsafeCSS(domtools.breakpoints.cssForPhablet(contentArg));
+  }
+  
+  public cssForPhone(contentArg) {
+    return unsafeCSS(domtools.breakpoints.cssForPhone(contentArg));
+  };
+
   public bdTheme(brightValueArg: string, darkValueArg: string): CSSResult {
     let returnCssVar: string;
     const existingTriplet = this.bdVarTripletStore.find(