section.sticky-list ul {
  position: relative;
}
section.sticky-list ul li .letter {
  font: var(--h2-font);
  border-radius: 100%;
  width: 100%;
  height: 0;
  padding-bottom: 100%;
  background-color: var(--chapter-color);
  border: 2px solid transparent;
  -webkit-transition: 0.2s ease-in-out;
  transition: 0.2s ease-in-out;
  position: relative;
}
@media screen and (max-width: 63.9375em) {
  section.sticky-list ul li .letter {
    -ms-grid-column: 1;
    -ms-grid-column-span: 2;
    grid-column: 1/3;
  }
}
section.sticky-list ul li .letter span {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
}
section.sticky-list ul li .letter.active {
  color: red;
  border-color: var(--chapter-color-dark);
  background: transparent;
  color: var(--chapter-color-dark);
}
section.sticky-list ul li .text {
  position: fixed;
  top: 50%;
  -webkit-transform: translateY(-50%) scale(1, 0);
          transform: translateY(-50%) scale(1, 0);
  width: calc(var(--column) * 5 + var(--gutter) * 4);
  margin-left: calc(var(--column) * 1 + var(--gutter) * 1);
  padding: 20px;
  background: var(--white);
  opacity: 0;
  border-radius: 2.5rem;
  text-align: center;
  -webkit-transition: 0.2s ease-in-out;
  transition: 0.2s ease-in-out;
  color: transparent;
  font: var(--h2-font);
}
section.sticky-list ul li .text.active {
  opacity: 1;
  -webkit-transform: translateY(-50%) scale(1, 1);
          transform: translateY(-50%) scale(1, 1);
  color: var(--black);
}
@media screen and (max-width: 63.9375em) {
  section.sticky-list ul li .text {
    width: calc(var(--column) * 10 + var(--gutter) * 9);
    margin-left: calc(var(--column) * 2 + var(--gutter) * 2);
  }
}