.checkbox {
  display: inline-block;
  position: relative;
  --size: 17px;

  &::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200%;
    height: 200%;
    background-color: var(--main-theme-color);
    border-radius: 999px;
    opacity: 0.25;

    transform: translate(-50%, -50%) scale(0);
    transition-property: transform;
    transition-duration: 250ms;
  }

  &:focus-within::before {
    transform: translate(-50%, -50%) scale(1);
  }
}

.real-checkbox {
  top: 0;
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.icon {
  display: block;
  width: var(--size);
  height: var(--size);
}

.checked {
  fill: var(--main-theme-color);
}

.disabled {
  fill: var(--dark-gray);
}