#block-core-slider-caption-overlay, #reveal--core_slider_caption_overlay { 
  --h1-font-weight: 700; 
  --h1-text-transform: uppercase; 
  --h4-font-color: #FFFFFF; 
  --h4-text-transform: none; 
  --button-border-color: transparent; 
  --button-border-color-hover: transparent; 
}