.edge--bottom {
  position: relative;
  z-index: 1;
}
.edge--bottom:after {
  background: inherit;
  content: '';
  display: block;
  height: 50%;
  left: 0;
  position: absolute;
  right: 0;
  z-index: -1;
  -webkit-backface-visibility: hidden;
}
.edge--bottom:after {
  bottom: 0;
  -webkit-transform: skewY(-1.5deg);
          transform: skewY(-1.5deg);
  -webkit-transform-origin: 100%;
          transform-origin: 100%;
}

.edge--bottom--reverse {
  position: relative;
  z-index: 1;
}
.edge--bottom--reverse:after {
  background: inherit;
  content: '';
  display: block;
  height: 50%;
  left: 0;
  position: absolute;
  right: 0;
  z-index: -1;
  -webkit-backface-visibility: hidden;
}
.edge--bottom--reverse:after {
  bottom: 0;
  -webkit-transform: skewY(1.5deg);
          transform: skewY(1.5deg);
  -webkit-transform-origin: 0 100%;
          transform-origin: 0 100%;
}

.edge--top {
  position: relative;
  z-index: 1;
}
.edge--top:before {
  background: inherit;
  content: '';
  display: block;
  height: 50%;
  left: 0;
  position: absolute;
  right: 0;
  z-index: -1;
  -webkit-backface-visibility: hidden;
}
.edge--top:before {
  top: 0;
  -webkit-transform: skewY(1.5deg);
          transform: skewY(1.5deg);
  -webkit-transform-origin: 100% 0;
          transform-origin: 100% 0;
}

.edge--top--reverse {
  position: relative;
  z-index: 1;
}
.edge--top--reverse:before {
  background: inherit;
  content: '';
  display: block;
  height: 50%;
  left: 0;
  position: absolute;
  right: 0;
  z-index: -1;
  -webkit-backface-visibility: hidden;
}
.edge--top--reverse:before {
  top: 0;
  -webkit-transform: skewY(-1.5deg);
          transform: skewY(-1.5deg);
  -webkit-transform-origin: 0 0;
          transform-origin: 0 0;
}

.edge--both {
  position: relative;
  z-index: 1;
}
.edge--both:before, .edge--both:after {
  background: inherit;
  content: '';
  display: block;
  height: 50%;
  left: 0;
  position: absolute;
  right: 0;
  z-index: -1;
  -webkit-backface-visibility: hidden;
}
.edge--both:before {
  top: 0;
  -webkit-transform: skewY(1.5deg);
          transform: skewY(1.5deg);
  -webkit-transform-origin: 100% 0;
          transform-origin: 100% 0;
}
.edge--both:after {
  bottom: 0;
  -webkit-transform: skewY(-1.5deg);
          transform: skewY(-1.5deg);
  -webkit-transform-origin: 100%;
          transform-origin: 100%;
}

.edge--both--reverse {
  position: relative;
  z-index: 1;
}
.edge--both--reverse:before, .edge--both--reverse:after {
  background: inherit;
  content: '';
  display: block;
  height: 50%;
  left: 0;
  position: absolute;
  right: 0;
  z-index: -1;
  -webkit-backface-visibility: hidden;
}
.edge--both--reverse:before {
  top: 0;
  -webkit-transform: skewY(-1.5deg);
          transform: skewY(-1.5deg);
  -webkit-transform-origin: 0 0;
          transform-origin: 0 0;
}
.edge--both--reverse:after {
  bottom: 0;
  -webkit-transform: skewY(1.5deg);
          transform: skewY(1.5deg);
  -webkit-transform-origin: 0 0;
          transform-origin: 0 0;
}