.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 16px 0;
}
.navbar #top {
  display: none;
  align-items: center;
  position: fixed;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  bottom: 0;
  right: 0;
  background: linear-gradient(#fff 50%, #000 50%);
  animation: rotate 1s linear infinite;
}
.navbar #top::before {
  content: '';
  display: block;
  width: 50%;
  height: 50%;
  border-radius: 50%;
  background: radial-gradient(#fff 25%, #000 25%);
  transform-origin: 0% 50%;
  animation: change 1s ease-in-out infinite alternate;
}
.navbar #top::after {
  content: '';
  display: block;
  width: 50%;
  height: 50%;
  border-radius: 50%;
  background: radial-gradient(#000 25%, #fff 25%);
  transform-origin: 100% 50%;
  animation: change 1s ease-in-out -1s infinite alternate;
}
.navbar #top:hover {
  box-shadow: 0 0 10px #b6b6b6;
}
@-moz-keyframes rotate {
  from {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}
@-webkit-keyframes rotate {
  from {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}
@-o-keyframes rotate {
  from {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}
@keyframes rotate {
  from {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}
@-moz-keyframes change {
  from {
    transform: scale(0.5);
  }
  to {
    transform: scale(1.5);
  }
}
@-webkit-keyframes change {
  from {
    transform: scale(0.5);
  }
  to {
    transform: scale(1.5);
  }
}
@-o-keyframes change {
  from {
    transform: scale(0.5);
  }
  to {
    transform: scale(1.5);
  }
}
@keyframes change {
  from {
    transform: scale(0.5);
  }
  to {
    transform: scale(1.5);
  }
}
.navbar > .title {
  color: #aaa;
  font-size: 2em;
  font-family: sans-serif;
}
.navbar > .menu {
  margin: 0;
  padding: 0;
}
.navbar > .menu > .item {
  display: inline-block;
  margin-right: 10px;
}
.navbar > .menu > .item > .link {
  color: #aaa;
}
.navbar > .menu > .item > .link:hover {
  color: #368ccb;
}