.menu {
  align-items: center;
  display: flex;
  position: relative;
}
.menu nav {
  position: absolute;
  inset: 0;
}
.menu ul {
  list-style-type: none;
  padding-left: 0;
  visibility: hidden;
}
.menu.is-open ul {
  visibility: visible;
}
.menu li {
  padding-bottom: .5em;
  opacity: 0;
  transform: translateX(-200%);
  transition: all 300ms ease;
}
.menu.is-open li {
  opacity: 1;
  transform: translateX(-150%);
  transition: all 300ms ease;
}
.menu li a {
  color: white;
  font-size: 1.2rem;
  text-transform: uppercase;
}
.menu li a:hover {
  color: var(--link-color);
}

@keyframes circle-pulse {
  0% {
    opacity: .6;
    transform: scale(1.1);
  } 33% {
    opacity: .45;
    transform: scale(.95);
  } 100% {
    opacity: .6;
    transform: scale(1.1);
  }
}

.menu::after {
  animation: circle-pulse 3s ease-out;
  animation-iteration-count: infinite;
  background-color: #BF6070;
  clip-path: circle(30% at 50% 50%);
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hamburger {
  display: flex;
  flex-direction: column;
  transition: all 150ms linear;
}
.menu.is-open .hamburger {
  transform: rotate(90deg);
  transition: all 150ms linear;
}
.hamburger > span {
  background-color: white;
  border-radius: .1em;
  margin-inline: 1em;
  opacity: 1;
  transition: all 150ms linear;
  width: 2em;
  height: .3em;
}
.hamburger > span + span {
  margin-top: .3em;
}
.menu.is-open .hamburger span {
  transition: all 150ms linear;
}
.menu.is-open .hamburger span:first-child {
  transform: translateY(.6em) rotate(45deg);
}
.menu.is-open .hamburger span:last-child {
  transform: translateY(-.6em) rotate(-45deg);
}
.menu.is-open .hamburger span:nth-child(2) {
  opacity: 0;
}

.nav-backdrop {
  background-color: #BF6070;
  border-radius: 50%;
  opacity: .6;
  position: fixed;
  top: 0;
  right: 0;
  transform: scale(0);
  transition: all 300ms ease;
  width: 1px;
  height: 1px;
  z-index: -1;
}
.nav-backdrop.is-open {
  filter: drop-shadow(0 0 .05em #BF6070);
  transform: scale(400);
  transition: all 300ms ease;
}