text: import { registerStyles, css } from '@vaadin/vaadin-themable-mixin/register-styles.js';
  import '@vaadin/vaadin-text-field/theme/material/vaadin-text-field.js';
  import '@vaadin/vaadin-material-styles/color.js';
  import '@vaadin/vaadin-material-styles/font-icons.js';
  import '@vaadin/vaadin-material-styles/mixins/field-button.js';
  
  registerStyles(
    'vaadin-combo-box',
    css`
      :host {
        display: inline-flex;
        outline: none;
        -webkit-tap-highlight-color: transparent;
      }
  
      [part='toggle-button']::before {
        content: var(--material-icons-dropdown);
      }
  
      :host([opened]) [part='toggle-button'] {
        transform: rotate(180deg);
      }
    `,
    { moduleId: 'material-combo-box', include: ['material-field-button'] }
  );
  