body {
  font-size: 16px;
  line-height: 1.65rem;
  margin: 0;
}
aside,
header {
  padding: 1rem;
}
li {
  margin: 1rem 0;
}
main {
  max-width: 80ch;
  margin: 2rem auto;
}
.banner {
  background: #000;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  padding: 1rem;
  text-align: center;
}
.list {
  list-style-type: none;
  margin: 0;
  padding: 0;
}
.nav {
  display: flex;
  gap: 1rem;
}
.skip_link {
  font-family: CircularStd, Arial, Helvetica, sans-serif;
  font-weight: 400;
  position: absolute;
  top: 0;
  left: 50%;
  z-index: 100;
  background: #ededed;
  color: #000;
  display: block;
  padding: 10px 20px;
  text-align: center;
  transform: translate(-50%, -200%);
  text-decoration: none;
}
.skip_link:focus {
  transform: translate(-50%, 25px);
}
@media screen and (prefers-reduced-motion: no-preference) {
  transition: transform 0.35s;
}
@media(max-width: 768px) {
    main {
        padding: 1rem;
    }
    .nav {
        flex-direction: column;
        gap: 0;
    }
    .nav li {
        margin: 5px 0;
    }
}