.radio {
  position: relative;
  cursor: pointer;
  line-height: 20px;
  font-size: 14px;
  font-weight: 500;
  margin: 15px;
}
.radio .label {
  position: relative;
  display: block;
  float: left;
  margin-right: 10px;
  width: 20px;
  height: 20px;
  border: 2px solid #c8ccd4;
  border-radius: 100%;
  -webkit-tap-highlight-color: transparent;
}
.radio .label:after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 10px;
  height: 10px;
  border-radius: 100%;
  background: #16415f;
  transform: scale(0);
  transition: all 0.2s ease;
  opacity: 0.08;
  pointer-events: none;
}
.radio:hover .label:after {
  transform: scale(3.6);
}
input[type="checkbox"]:checked + .label, input[type="radio"]:checked + .label {
  border-color: #16415f;
}
input[type="checkbox"]:checked + .label:after, input[type="radio"]:checked + .label:after {
  transform: scale(1);
  transition: all 0.2s cubic-bezier(0.35, 0.9, 0.4, 0.9);
  opacity: 1;
}
.cntr {
  position: absolute;
  top: calc(50% - 10px);
  left: 0;
  width: 100%;
  text-align: center;
}
.hidden {
  display: none;
}
.credit {
  position: fixed;
  right: 20px;
  bottom: 20px;
  transition: all 0.2s ease;
  -webkit-user-select: none;
  user-select: none;
  opacity: 0.6;
}
.credit img {
  width: 72px;
}
.credit:hover {
  transform: scale(0.95);
}