body {
  background-color: var(--white);
  overflow: hidden;
  position: relative;
}

.wrapper {
  font-family: Antarctica;
  color: var(--dark);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100vw;
  height: 100vh;
}

.letter {
  position: absolute;
  font-size: 30rem;
  font-variation-settings: "wght" 100;
  animation-name: letter;
  animation-duration: 1s;
  animation-direction: alternate;
  animation-iteration-count: infinite;
  animation-timing-function: ease-in-out;
  animation-fill-mode: forwards;
  animation-delay: calc(1s * var(--i));
  mix-blend-mode: multiply;
  color: var(--red);
}

.letter:nth-child(odd) {
  color: var(--red);
}

@keyframes letter {
  from {
    font-variation-settings: "wght" 100;
  }

  to {
    font-variation-settings: "wght" calc(100 * var(--i));
  }
}