#block-custompopupannouncement { 
  --h3-font-size: 22px; 
  --h3-font-style: italic; 
  --h4-font-size: 19px; 
  --button-style: none; 
  --button-border-color: transparent; 
  --button-border-color-hover: transparent; 
  --background-style: solid; 
}