.ddm-collapsible__body {
  overflow: hidden;
  height: 0; /* default closed */

  .ddm-collapsible--will-open > & {
    /* nothing special; here for symmetry */
  }

  .ddm-collapsible--opening > & {
    transition: height .3s;
    /* height: contentHeight; set by javascript */
  }

  .ddm-collapsible--open > & {
    height: auto;
  }

  .ddm-collapsible--will-close > & {
    /* height: contentHeight; set by javascript */
  }

  .ddm-collapsible--closing > & {
    transition: height .3s;
  }

  .ddm-collapsible--closed > & {
    /* nothing special; here for symmetry */
  }
}

.ddm-collapsible__head {
  cursor: pointer;
  position: relative;
  padding-right: 26px;
}

.ddm-collapsible__arrow {
  position: absolute;
  top: 0;
  right: 0;
  display: block;
  height: 100%;
  width: 20px;
  text-align: center;

  &:before {
    content: "\25b8";
    vertical-align: middle;
    display: block;

    .csstransforms & {
      transition: all .2s;
    }

    .ddm-collapsible--opening > .ddm-collapsible__head > &,
    .ddm-collapsible--open > .ddm-collapsible__head > & {
      content: "\25be";

      .csstransforms & {
        content: "\25b8";
        transform: rotate(90deg); /* Opera */
      }
    }
  }

  /* IE8 arrow fallback */
  &--with-image {
    background: url('../img/left-arrow.png') no-repeat center center;

    &:before {
      display: none;
    }

    .ddm-collapsible--opening > .ddm-collapsible__head > &,
    .ddm-collapsible--open > .ddm-collapsible__head > & {
      background: url('../img/down-arrow.png') no-repeat center center;
    }
  }
}