body {
  display: flex;
  justify-content: center;
  align-items: center;
  background: #E6E9ED;
  min-height: 100vh;
}
body nav.tab {
  position: relative;
  display: flex;
  align-items: stretch;
  width: 23rem;
  height: 4rem;
}
body nav.tab.moving .icon {
  pointer-events: none;
}
body nav.tab[data-selected="1"] .icon:nth-child(1), 
body nav.tab[data-selected="2"] .icon:nth-child(2), 
body nav.tab[data-selected="3"] .icon:nth-child(3) {
  top: -1.5rem;
  color: #2ABA66;
  font-size: 2rem;
  transition: 0.25s 0.375s;
  pointer-events: none;
}
body nav.tab[data-selected="1"] .icon:nth-child(1).initialised, body nav.tab[data-selected="2"] .icon:nth-child(2).initialised, 
body nav.tab[data-selected="3"] .icon:nth-child(3).initialised {
  -webkit-animation: hide 0.9s forwards;
          animation: hide 0.9s forwards;
}
body nav.tab[data-selected="1"] .bar .middle .side:first-child, body nav.tab[data-selected="3"] .bar .middle .side:last-child {
  flex-grow: 0;
}
body nav.tab .icons {
  position: absolute;
  z-index: 2;
  display: flex;
  justify-content: space-around;
  width: calc(100% - 2rem);
  padding: 0 1rem;
}
body nav.tab .icons .icon {
  position: relative;
  top: 0rem;
  width: 4rem;
  line-height: 4rem;
  font-size: 1.5rem;
  text-align: center;
  cursor: pointer;
  transition-delay: 0.1875s;
}
body nav.tab .icons .icon.initialised {
  -webkit-animation: hide2 0.375s;
          animation: hide2 0.375s;
}
body nav.tab .bar {
  z-index: 1;
  position: absolute;
  display: flex;
  align-items: stretch;
  filter: drop-shadow(0 0 0.5rem rgba(0, 0, 0, 0.1)) drop-shadow(0 0 0.25rem rgba(0, 0, 0, 0.1));
  width: 100%;
  height: 100%;
}
body nav.tab .bar .cap {
  background: white;
  width: 1rem;
}
body nav.tab .bar .cap:first-child {
  border-bottom-left-radius: 1rem;
  border-top-left-radius: 0.5rem;
  box-shadow: 0.25rem 0 0 white;
}
body nav.tab .bar .cap:last-child {
  border-bottom-right-radius: 1rem;
  border-top-right-radius: 0.5rem;
  box-shadow: -0.25rem 0 0 white;
}
body nav.tab .bar .middle {
  flex-grow: 1;
  position: relative;
  display: flex;
}
body nav.tab .bar .middle .circle {
  position: relative;
  top: -1.75rem;
  width: 7rem;
  height: 5.75rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='112' height='92' viewBox='0 0 112 92'%3E%3Ccircle cx='56' cy='36' r='36' fill='%23FFF'/%3E%3Cpath d='M104 35.2L104 35.2c0 26.3-20.9 48.3-47.2 48.8C29.9 84.4 8 62.8 8 36v-0.8c0-4-3.2-7.2-7.2-7.2H0v64h112V28h-0.8C107.2 28 104 31.2 104 35.2z' fill='%23FFF'/%3E%3C/svg%3E");
}
body nav.tab .bar .middle .side {
  flex-grow: 1;
  background: white;
  transition: 0.75s ease;
}

@-webkit-keyframes hide {
  0%, 100% {
    opacity: 1;
  }
  25%, 75% {
    opacity: 0;
  }
}

@keyframes hide {
  0%, 100% {
    opacity: 1;
  }
  25%, 75% {
    opacity: 0;
  }
}
@-webkit-keyframes hide2 {
  0%, 100% {
    opacity: 1;
  }
  15%, 75% {
    opacity: 0;
  }
}
@keyframes hide2 {
  0%, 100% {
    opacity: 1;
  }
  15%, 75% {
    opacity: 0;
  }
}