.cb-liquid {
  display: inline-flex; align-items: center;
  gap: 10px; cursor: pointer; user-select: none;
}
.cb-liquid__input { display: none; }
.cb-liquid__box {
  width: 24px; height: 24px; border-radius: 7px;
  border: 2px solid rgba(61,232,245,.4);
  position: relative; overflow: hidden;
  display: flex; align-items: center;
  justify-content: center; color: transparent;
  transition: border-color .3s, color .3s;
}
.cb-liquid__fill {
  position: absolute; inset: 0;
  background: linear-gradient(180deg,
    #3de8f5, #06b6d4);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform .35s
    cubic-bezier(.23,1,.32,1);
}
.cb-liquid__input:checked + .cb-liquid__box {
  border-color: #3de8f5; color: #fff;
}
.cb-liquid__input:checked
  + .cb-liquid__box .cb-liquid__fill {
  transform: scaleY(1);
}