<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path d="M21,4H3C2.447,4,2,4.448,2,5v14c0,0.552,0.447,1,1,1h18c0.553,0,1-0.448,1-1V5C22,4.448,21.553,4,21,4z M20,18H4V8h16V18z"/></svg>