h1.title {
  font-size: 55px;
  color: white;
  background-color: red;
}

.subtitle {
  color: white;
  background-color: red;
}

.quarto-title-author-name, .date {
  font-size: 30px;
  color: white;
  background-color: red;
}

p.author {
  color: white;
}

.reveal blockquote {
  color: black;
  border-left: 3px solid red; 
  padding: 0.5em 10px;
}

.reveal .progress span { 
  color: red;
}

.center-xy {
  margin: 0;
  position: absolute;
  top: 50%;
  left: 50%;
  -ms-transform: translateY(-50%), translateX(-50%);
  transform: translateY(-50%), translateX(-50%);
}