text: // eagerly import theme styles so as we can override them
  import '@vaadin/vaadin-lumo-styles/all-imports';
  
  import {registerStyles, css} from '@vaadin/vaadin-themable-mixin/register-styles';
  
  registerStyles('vaadin-app-layout', css`
    :host(:not([dir='rtl']):not([overlay])) [part='drawer'] {
      border-right: none;
      box-shadow: var(--lumo-box-shadow-s);
      background-color: var(--lumo-base-color);
      z-index: 1;
    }
    :host([dir='rtl']:not([overlay])) [part='drawer'] {
      border-left: none;
      box-shadow: var(--lumo-box-shadow-s);
      background-color: var(--lumo-base-color);
      z-index: 1;
    }
    [part='navbar'] {
      box-shadow: var(--lumo-box-shadow-s);
    }
  `);
  