image-checkbox.css

.image-checkbox-text {
  font-size: 11px;
  text-align: center;
  width: 95px;
  height: 36px;
  word-wrap: break-word;
}

.image-checkbox-ul {
  list-style-type: none;
}

.image-checkbox-ul>li {
  display: inline-block;
}

.image-checkbox-ul input[type="checkbox"] {
  display: none;
}

.image-checkbox-ul label {
  padding: 10px;
  display: block;
  position: relative;
  margin: 5px;
  margin-bottom: 2px;
  cursor: pointer;
}

.image-checkbox-ul label {
  border: 1px solid #fff;
}

.theme_dark .image-checkbox-ul label {
  border: 1px solid #222;
}

.image-checkbox-ul label:before {
  background-color: white;
  color: white;
  content: " ";
  display: block;
  border-radius: 50%;
  border: 1px solid grey;
  position: absolute;
  top: -5px;
  left: -5px;
  width: 25px;
  height: 25px;
  text-align: center;
  line-height: 28px;
  transition-duration: 0.4s;
  transform: scale(0);
}

.image-checkbox-ul label img {
  height: 64px;
  width: 64px;
  transition-duration: 0.2s;
  transform-origin: 50% 50%;
}

.image-checkbox-ul :checked+label {
  border-color: #ddd;
}

.image-checkbox-ul :checked+label:before {
  content: "✓";
  background-color: grey;
  transform: scale(1);
}

.image-checkbox-ul :checked+label img {
  transform: scale(0.9);
  /* box-shadow: 0 0 5px #333; */
  z-index: -1;
}