@vaadin/vaadin-lumo-styles/src/components/combo-box-item.css

Lumo is a design system foundation for modern web applications, used by Vaadin components

/**
 * @license
 * Copyright (c) 2017 - 2026 Vaadin Ltd.
 * This program is available under Apache License Version 2.0, available at https://vaadin.com/license/
 */
@media lumo_components_combo-box-item {
  :host {
    transition: background-color 100ms;
    overflow: hidden;
    --_lumo-item-selected-icon-display: block;
    --_focus-ring-color: var(--vaadin-focus-ring-color, var(--lumo-primary-color-50pct));
    --_focus-ring-width: var(--vaadin-focus-ring-width, 2px);
  }

  :host([focused]:not([disabled])) {
    box-shadow: inset 0 0 0 var(--_focus-ring-width) var(--_focus-ring-color);
  }
}