styles.css

.background {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: white;
  z-index: -1;
}

img {
  mix-blend-mode: difference;
}

h1,
h2 {
  border-bottom: none;
  padding-bottom: 0;
  margin-top: 12px;
}

#halfTransparent {
  opacity: 0.5;
}