.b-diff, * {
  position: relative;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

.b-diff img:nth-child(1) { z-index: 1; }

.b-diff img:nth-child(2) { z-index: 2; }

.b-diff img {
  position: absolute;
  top: 0;
  left: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.b-diff__control {
  position: absolute;
  z-index: 3;
  height: 100%;
  padding: 0 18px;
}

.b-diff__control:hover { cursor: col-resize; }

.b-diff__control:hover .b-diff__arrow_left {
  -webkit-transform: translate3d(-5px, 0, 0);
  transform: translate3d(-5px, 0, 0);
}

.b-diff__control:hover .b-diff__arrow_right {
  -webkit-transform: translate3d(5px, 0, 0);
  transform: translate3d(5px, 0, 0);
}

.b-diff__line {
  height: 100%;
  width: 4px;
  background: #f5f5f5;
}

.b-diff__arrow {
  position: absolute;
  top: 50%;
  width: 0;
  height: 0;
  -webkit-transition: transform .3s ease;
  transition: transform .3s ease;
  -webkit-transform: translate3d(0px, 0, 0);
  transform: translate3d(0px, 0, 0);
}

.b-diff__arrow_left {
  left: 0px;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-right: 10px solid #f5f5f5;
}

.b-diff__arrow_right {
  right: 0px;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 10px solid #f5f5f5;
}