@vaadin/vaadin-lumo-styles/src/components/accordion-heading.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_accordion-heading {
  :host {
    display: block;
    outline: none;
    -webkit-user-select: none;
    user-select: none;
    padding: 0;
  }

  :host([hidden]) {
    display: none !important;
  }

  button {
    display: flex;
    align-items: center;
    justify-content: inherit;
    width: 100%;
    margin: 0;
    padding: 0;
    background-color: initial;
    color: inherit;
    border: initial;
    outline: none;
    font: inherit;
    text-align: inherit;
  }

  [part='content'] {
    padding: var(--lumo-space-s) 0;
  }

  :host([theme~='filled']) {
    padding-top: 0;
    padding-bottom: 0;
  }
}