$white: #fff;

@mixin transition($animation) {
  -webkit-transition: $animation .25s ease-in-out;
  -moz-transition: $animation .25s ease-in-out;
  -ms-transition: $animation .25s ease-in-out;
  -o-transition: $animation .25s ease-in-out;
  transition: $animation .25s ease-in-out;
}

@keyframes easeInElastic {
  0% { transform: scale(1); }
  25% { transform: scale(1.135); }
  100% { transform: scale(0); }
}

@keyframes easeInElasticVisible {
  0% { transform: scale(1); }
  25% { transform: scale(1.135); }
  100% { transform: scale(.85); }
}

@keyframes easeOutElastic {
  0% { transform: scale(0); };
  60% { transform: scale(1.135); }
  80% { transform: scale(.95); }
  100% { transform: scale(1); }
}

@keyframes easeOutElasticVisible {
  0% { transform: scale(.85); };
  20% { transform: scale(1.05); }
  40% { transform: scale(.95); }
  100% { transform: scale(1); }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  background: #3f4145;
  z-index: -99;
}

.logo a {
  position: absolute;
  top: 50%;
  left: 50%;
  display: block;
  width: 100px;
  height: 100px;
  margin-top: -50px;
  margin-left: -50px;
  cursor: pointer;
  span {
    position: absolute;
    display: block;
    width: 100px;
    height: 100px;
    background: #00b1d4;
    border-radius: 50%;
    box-shadow: 1px 3px 6px rgba(0,0,0, .15);
    transform: scale(0);
  }
}

.cdunn {
  position: relative;
  width: 100%;
  height: auto;
  @include transition(all);
}

.cdunn-path {
  position: absolute;
  width: 100%;
  height: auto;
  @include transition(all);
}

.logo.animate a span {
  animation: easeInElastic .35s forwards;
}

.logo.animate a .cdunn {
  animation: easeOutElasticVisible .5s forwards;
}

.logo.animate a:focus span,
.logo.animate a:hover span {
  animation: easeOutElastic .5s forwards;
}

.logo.animate a:focus .cdunn,
.logo.animate a:hover .cdunn {
  animation: easeInElasticVisible .35s forwards;
}

.logo a:focus .cdunn-path,
.logo a:hover .cdunn-path {
  fill: $white;
}