<div class="checkbox-wrapper-12">
  <div class="cbx">
    <input id="cbx-12" type="checkbox">
    <label for="cbx-12"></label>
    <svg width="15" height="14" viewBox="0 0 15 14" fill="none">
      <path d="M2 8.36364L6.23077 12L13 2"></path>
    </svg>
  </div>
  
  <svg xmlns="http://www.w3.org/2000/svg" version="1.1">
    <defs>
      <filter id="goo-12">
        <feGaussianBlur in="SourceGraphic" stdDeviation="4" result="blur"></feGaussianBlur>
        <feColorMatrix in="blur" mode="matrix" values="1 0 0 0 0  0 1 0 0 0  0 0 1 0 0  0 0 0 22 -7" result="goo-12"></feColorMatrix>
        <feBlend in="SourceGraphic" in2="goo-12"></feBlend>
      </filter>
    </defs>
  </svg>
</div>
*{
  box-sizing:border-box;
  margin:0;
  padding:0;
}
html,
body {
  height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  background-color: #212121;
}
.checkbox-wrapper-12 {
  position: relative;
}

.checkbox-wrapper-12 > svg {
  position: absolute;
  top: -130%;
  left: -170%;
  width: 110px;
  pointer-events: none;
}

.checkbox-wrapper-12 * {
  box-sizing: border-box;
}

.checkbox-wrapper-12 input[type="checkbox"] {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
  margin: 0;
}

.checkbox-wrapper-12 input[type="checkbox"]:focus {
  outline: 0;
}

.checkbox-wrapper-12 .cbx {
  width: 24px;
  height: 24px;
  top: calc(100px - 12px);
  left: calc(100px - 12px);
}

.checkbox-wrapper-12 .cbx input {
  position: absolute;
  top: 0;
  left: 0;
  width: 24px;
  height: 24px;
  border: 2px solid #bfbfc0;
  border-radius: 50%;
}

.checkbox-wrapper-12 .cbx label {
  width: 24px;
  height: 24px;
  background: none;
  border-radius: 50%;
  position: absolute;
  top: 0;
  left: 0;
  transform: trasnlate3d(0, 0, 0);
  pointer-events: none;
}

.checkbox-wrapper-12 .cbx svg {
  position: absolute;
  top: 5px;
  left: 4px;
  z-index: 1;
  pointer-events: none;
}

.checkbox-wrapper-12 .cbx svg path {
  stroke: #fff;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 19;
  stroke-dashoffset: 19;
  transition: stroke-dashoffset 0.3s ease;
  transition-delay: 0.2s;
}

.checkbox-wrapper-12 .cbx input:checked + label {
  animation: splash-12 0.6s ease forwards;
}

.checkbox-wrapper-12 .cbx input:checked + label + svg path {
  stroke-dashoffset: 0;
}

@-moz-keyframes splash-12 {
  40% {
    background: #866efb;
    box-shadow: 0 -18px 0 -8px #866efb, 16px -8px 0 -8px #866efb, 16px 8px 0 -8px #866efb, 0 18px 0 -8px #866efb, -16px 8px 0 -8px #866efb, -16px -8px 0 -8px #866efb;
  }

  100% {
    background: #866efb;
    box-shadow: 0 -36px 0 -10px transparent, 32px -16px 0 -10px transparent, 32px 16px 0 -10px transparent, 0 36px 0 -10px transparent, -32px 16px 0 -10px transparent, -32px -16px 0 -10px transparent;
  }
}

@-webkit-keyframes splash-12 {
  40% {
    background: #866efb;
    box-shadow: 0 -18px 0 -8px #866efb, 16px -8px 0 -8px #866efb, 16px 8px 0 -8px #866efb, 0 18px 0 -8px #866efb, -16px 8px 0 -8px #866efb, -16px -8px 0 -8px #866efb;
  }

  100% {
    background: #866efb;
    box-shadow: 0 -36px 0 -10px transparent, 32px -16px 0 -10px transparent, 32px 16px 0 -10px transparent, 0 36px 0 -10px transparent, -32px 16px 0 -10px transparent, -32px -16px 0 -10px transparent;
  }
}

@-o-keyframes splash-12 {
  40% {
    background: #866efb;
    box-shadow: 0 -18px 0 -8px #866efb, 16px -8px 0 -8px #866efb, 16px 8px 0 -8px #866efb, 0 18px 0 -8px #866efb, -16px 8px 0 -8px #866efb, -16px -8px 0 -8px #866efb;
  }

  100% {
    background: #866efb;
    box-shadow: 0 -36px 0 -10px transparent, 32px -16px 0 -10px transparent, 32px 16px 0 -10px transparent, 0 36px 0 -10px transparent, -32px 16px 0 -10px transparent, -32px -16px 0 -10px transparent;
  }
}

@keyframes splash-12 {
  40% {
    background: #866efb;
    box-shadow: 0 -18px 0 -8px #866efb, 16px -8px 0 -8px #866efb, 16px 8px 0 -8px #866efb, 0 18px 0 -8px #866efb, -16px 8px 0 -8px #866efb, -16px -8px 0 -8px #866efb;
  }

  100% {
    background: #866efb;
    box-shadow: 0 -36px 0 -10px transparent, 32px -16px 0 -10px transparent, 32px 16px 0 -10px transparent, 0 36px 0 -10px transparent, -32px 16px 0 -10px transparent, -32px -16px 0 -10px transparent;
  }
}
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