<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css" />
<div class="center">
  <label class="label">
    <input  class="label__checkbox" type="checkbox" />
    <span class="label__text">
      <span class="label__check">
        <i class="fa fa-check icon"></i>
      </span>
    </span>
  </label>
</div>

body, html {
  font-family: 'Lato', monospace;
  font-size: ~'calc(1rem + 1vw)';
}

.label__checkbox {
  display: none;
}

.label__check {
  display: inline-block;
  border-radius: 50%;
  border: 5px solid rgba(0,0,0,0.1);
  background: white;
  vertical-align: middle;
  margin-right: 20px;
  width: 2em;
  height: 2em;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border .3s ease;
  
  i.icon {
    opacity: 0.2;
    font-size: ~'calc(1rem + 1vw)';
    color: transparent;
    transition: opacity .3s .1s ease;
    -webkit-text-stroke: 3px rgba(0,0,0,.5);
  }
  
  &:hover {
    border: 5px solid rgba(0,0,0,0.2);
  }
}

.label__checkbox:checked + .label__text .label__check {
  animation: check .5s cubic-bezier(0.895, 0.030, 0.685, 0.220) forwards;
  
  .icon {
    opacity: 1;
    transform: scale(0);
    color: white;
    -webkit-text-stroke: 0;
    animation: icon .3s cubic-bezier(1.000, 0.008, 0.565, 1.650) .1s 1 forwards;
  }
}

.center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
}

@keyframes icon {
  from {
    opacity: 0;
    transform: scale(0.3);
  }
  to {
    opacity: 1;
    transform: scale(1)
  }
}

@keyframes check {
  0% {
    width: 1.5em;
    height: 1.5em;
    border-width: 5px;
  }
  10% {
    width: 1.5em;
    height: 1.5em;
    opacity: 0.1;
    background: rgba(0,0,0,0.2);
    border-width: 15px;
  }
  12% {
    width: 1.5em;
    height: 1.5em;
    opacity: 0.4;
    background: rgba(0,0,0,0.1);
    border-width: 0;
  }
  50% {
    width: 2em;
    height: 2em;
    background: #00d478;
    border: 0;
    opacity: 0.6;
  }
  100% {
    width: 2em;
    height: 2em;
    background: #00d478;
    border: 0;
    opacity: 1;
  }
}