html, body {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
  position: relative;
  font: 100%/1.5 Helvetica Neue;
  -webkit-font-smoothing: antialiased;
  background-color: darken(#70b0e1, 50%);
  color: #fff;
}

.shine {
  position: absolute;
  width: 200px;
  top: 50%;
  left: 50%;
  height: 60px;
  margin-left: -100px;
  text-align: center;
  text-shadow: 0 1px 2px rgba(0,0,0,.1);
  -webkit-mask-image: linear-gradient(-75deg, rgba(0,0,0,.6) 30%, #000 50%, rgba(0,0,0,.6) 70%);
  -webkit-mask-size: 200%;
  animation: shine 4s infinite, hover 2s alternate infinite ease-in-out;
  
  &:after {
    content: '';
    position: relative;
    display: block;
    width: 10px;
    height: 10px;
    border: 2px solid #fff;
    border-top: none;
    border-left: none;
    left: 50%;
    margin-left: -5px;
    transform: translateY(30%) rotate(45deg);
    animation: hoverSmall 2s 1s alternate infinite ease-in-out;
  }
}

@-webkit-keyframes shine {
  from {
    -webkit-mask-position: 150%;
  }
  
  to {
    -webkit-mask-position: -50%;
  }
}

@-webkit-keyframes hover {
  from {
    transform: translateY(-50%);
  }
  
  to {
    transform: translateY(-75%);
  }
}

@-webkit-keyframes hoverSmall {
  from {
    transform: translateY(30%) rotate(45deg);
  }
  to {
    transform: translateY(-10%) rotate(45deg);
  }
}