@checkbox-cursor: pointer;
@checkbox-position: relative;
@checkbox-size: 18px;

@checkbox-input-display: none;

@checkbox-box-border-radius: 3px;
@checkbox-box-box-sizing: border-box;
@checkbox-box-position: absolute;
@checkbox-box-size: 18px;
@checkbox-label-spacing: @checkbox-box-size;
@checkbox-box-transform-origin: 40% 90%;
@checkbox-box-transform: rotate(0deg) scale(1);

@checkbox-check-fix-left: 4px;
@checkbox-check-fix-bottom: 6px;
@checkbox-check-height: 10px;
@checkbox-check-position: absolute;
@checkbox-check-transform-origin: 40% 100%;
@checkbox-check-transform: rotate(-45deg) scale(0);
@checkbox-check-width: 15px;

@checkbox-checked-box-transform: rotate(45deg) scale(0);

@checkbox-checked-check-height: 10px;
@checkbox-checked-check-transform: rotate(-45deg) scale(1);
@checkbox-checked-check-transition-delay: .1s;
@checkbox-checked-check-width: 18px;

.mui-checkbox {
  .ease-out;
  cursor: @checkbox-cursor;
  height: @checkbox-size;
  position: @checkbox-position;
  width: @checkbox-size;

  input {
    display: @checkbox-input-display;
  }

  .mui-checkbox-label {
    position: relative;
    left: @checkbox-label-spacing;
    padding: 0 5px;
  }

  .mui-checkbox-box {
    .ease-out;
    background-color: @checkbox-box-background-color;
    border: 2px solid @checkbox-box-border-color;
    border-radius: @checkbox-box-border-radius;
    box-sizing: @checkbox-box-box-sizing;
    height: @checkbox-box-size;
    position: @checkbox-box-position;
    .lh-transform(@checkbox-box-transform);
    transform-origin: @checkbox-box-transform-origin;
    width: @checkbox-box-size;
  }

  .mui-checkbox-check {
    .ease-out;
    border-bottom: 2px solid @checkbox-check-color;
    border-left: 2px solid @checkbox-check-color;
    bottom: @checkbox-check-fix-left;
    height: @checkbox-check-height;
    left: @checkbox-check-fix-left;
    position: @checkbox-check-position;
    .lh-transform(@checkbox-check-transform);
    transform-origin: @checkbox-check-transform-origin;
    width: @checkbox-check-height;
  }

  &.mui-checked {
    .mui-checkbox-box {
      .ease-out;
      .lh-transform(rotate(45deg) scale(0));
    }

    .mui-checkbox-check {
      .ease-out;
      height: @checkbox-checked-check-height;
      .lh-transform(@checkbox-checked-check-transform);
      transition-delay: @checkbox-checked-check-transition-delay;
      width: @checkbox-checked-check-width;
    }
  }
}