.cardslider {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.cardslider__cards,
.cardslider__dots-nav {
  margin: 0;
  padding: 0;
  list-style: none;
}

.cardslider__cards {
  width: 90%;
  height: 90%;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  transform-style: preserve-3d;
}

.cardslider__dots-nav {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
}

.cardslider__dot {
  display: inline-block;
  margin-right: 8px;
}

.cardslider__dot-btn {
  position: relative;
  border-radius: 50%;
  border: 2px solid white;
  width: 10px;
  height: 10px;
  display: block;
  appearance: none;
  background: none;
  padding: 0;
}

.cardslider__dot-btn::before {
  content: ' ';
  position: absolute;
  display: block;
  background: white;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  left: 50%;
  top: 50%;
  transition: all .5s;
  transform: translate(-50%, -50%) scale(0);
}

.cardslider__dot--active .cardslider__dot-btn::before {
  transform: translate(-50%, -50%) scale(1.1);
}

.cardslider__card {
  background: #d7d7d7;
  display: block;
  border-radius: 10px;
  width: 100%;
  height: 100%;
  position: absolute;
  will-change: transform, opacity, background;
  transition: background 0.5s ease-out, opacity 0.5s;
}

.cardslider__card--transitions {
  transition: background 0.5s ease-out, transform 0.5s ease-out, opacity 0.5s;
}

.cardslider__card--index-0 {
  background: white;
}

.cardslider__card--index-1 {
  background: whitesmoke;
}

.cardslider__card--index-2 {
  background: #ebebeb;
}

.cardslider__card--index-3 {
  background: #e1e1e1;
}

.cardslider__card--invisible {
  opacity: 0;
}

.cardslider--direction-up .cardslider__card {
  transform: scale(0.8) translate3d(0, 17.25%, 0);
}

.cardslider--direction-up .cardslider__card--index-0 {
  transform: translate3d(0, 0, 4px);
}

.cardslider--direction-up .cardslider__card--index-1 {
  transform: scale(0.95) translate3d(0, 4.31%, 3px);
}

.cardslider--direction-up .cardslider__card--index-2 {
  transform: scale(0.9) translate3d(0, 8.61%, 2px);
}

.cardslider--direction-up .cardslider__card--index-3 {
  transform: scale(0.85) translate3d(0, 12.91%, 1px);
}

.cardslider--direction-up .cardslider__card--out {
  transform: translate3d(0, 150%, 4px);
}

.cardslider--sortback-up {
  animation: sortback-up 0.67s;
}

.cardslider--sortfront-up {
  animation: sortfront-up 0.67s;
}

.cardslider--direction-down .cardslider__card {
  transform: scale(0.8) translate3d(0, -17.25%, 0);
}

.cardslider--direction-down .cardslider__card--index-0 {
  transform: translate3d(0, 0, 4px);
}

.cardslider--direction-down .cardslider__card--index-1 {
  transform: scale(0.95) translate3d(0, -4.31%, 3px);
}

.cardslider--direction-down .cardslider__card--index-2 {
  transform: scale(0.9) translate3d(0, -8.61%, 2px);
}

.cardslider--direction-down .cardslider__card--index-3 {
  transform: scale(0.85) translate3d(0, -12.91%, 1px);
}

.cardslider--direction-down .cardslider__card--out {
  transform: translate3d(0, 150%, 4px);
}

.cardslider--sortback-down {
  animation: sortback-down 0.67s;
}

.cardslider--sortfront-down {
  animation: sortfront-down 0.67s;
}

.cardslider--direction-right .cardslider__card {
  transform: scale(0.8) translate3d(-17.25%, 0, 0);
}

.cardslider--direction-right .cardslider__card--index-0 {
  transform: translate3d(0, 0, 4px);
}

.cardslider--direction-right .cardslider__card--index-1 {
  transform: scale(0.95) translate3d(-4.31%, 0, 3px);
}

.cardslider--direction-right .cardslider__card--index-2 {
  transform: scale(0.9) translate3d(-8.61%, 0, 2px);
}

.cardslider--direction-right .cardslider__card--index-3 {
  transform: scale(0.85) translate3d(-12.91%, 0, 1px);
}

.cardslider--direction-right .cardslider__card--out {
  transform: translate3d(150%, 0, 4px);
}

.cardslider--sortback-right {
  animation: sortback-right 0.67s;
}

.cardslider--sortfront-right {
  animation: sortfront-right 0.67s;
}

.cardslider--direction-left .cardslider__card {
  transform: scale(0.8) translate3d(17.25%, 0, 0);
}

.cardslider--direction-left .cardslider__card--index-0 {
  transform: translate3d(0, 0, 4px);
}

.cardslider--direction-left .cardslider__card--index-1 {
  transform: scale(0.95) translate3d(4.31%, 0, 3px);
}

.cardslider--direction-left .cardslider__card--index-2 {
  transform: scale(0.9) translate3d(8.61%, 0, 2px);
}

.cardslider--direction-left .cardslider__card--index-3 {
  transform: scale(0.85) translate3d(12.91%, 0, 1px);
}

.cardslider--direction-left .cardslider__card--out {
  transform: translate3d(150%, 0, 4px);
}

.cardslider--sortback-left {
  animation: sortback-left 0.67s;
}

.cardslider--sortfront-left {
  animation: sortfront-left 0.67s;
}

.cardslider__direction-nav {
    position: absolute;
    right: 55px;
    bottom: 40%;
}

.cardslider__nav-next,
.cardslider__nav-prev {
  display: block;
  background: rgba(0,0,0,0.3);
  border: none;
  width: 40px;
  height: 40px;
  text-indent: -9999px;
  outline: none;
  transition: all .3s;
  border: 2px solid #fff;
  border-radius: 50%;
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 20px 20px;
  padding: 0;
}

.cardslider__nav-next:active,
.cardslider__nav-prev:active {
  transform: scale(0.8);
}

.cardslider__nav-next {
  margin-bottom: 10px;
  background-image: url("../img/arrow-up.svg");
}

.cardslider__nav-prev {
  background-image: url("../img/arrow-down.svg");
}

@keyframes sortback-down {
  0% {
    transform: translate3d(0, 0, 4px) scale(1);
  }

  50% {
    transform: translate3d(0, 150%, 4px) scale(1);
  }

  60% {
    transform: translate3d(0, 150%, 0) scale(0.8);
  }

  100% {
    transform: translate3d(0, 0, 0) scale(0.8);
  }
}

@keyframes sortfront-down {
  0% {
    transform: translate3d(0, 0, 0) scale(0.8);
  }

  50% {
    transform: translate3d(0, 150%, 0) scale(0.8);
  }

  60% {
    transform: translate3d(0, 150%, 4px) scale(1);
  }

  100% {
    transform: translate3d(0, 0, 4px) scale(1);
  }
}

@keyframes sortback-up {
  0% {
    transform: translate3d(0, 0, 4px) scale(1);
  }

  50% {
    transform: translate3d(0, -150%, 4px) scale(1);
  }

  60% {
    transform: translate3d(0, -150%, 0) scale(0.8);
  }

  100% {
    transform: translate3d(0, 0, 0) scale(0.8);
  }
}

@keyframes sortfront-up {
  0% {
    transform: translate3d(0, 0, 0) scale(0.8);
  }

  50% {
    transform: translate3d(0, -150%, 0) scale(0.8);
  }

  60% {
    transform: translate3d(0, -150%, 4px) scale(1);
  }

  100% {
    transform: translate3d(0, 0, 4px) scale(1);
  }
}

@keyframes sortback-left {
  0% {
    transform: translate3d(0, 0, 4px) scale(1);
  }

  50% {
    transform: translate3d(-150%, 0, 4px) scale(1);
  }

  60% {
    transform: translate3d(-150%, 0, 0) scale(0.8);
  }

  100% {
    transform: translate3d(0, 0, 0) scale(0.8);
  }
}

@keyframes sortfront-left {
  0% {
    transform: translate3d(0, 0, 0) scale(0.8);
  }

  50% {
    transform: translate3d(-150%, 0, 0) scale(0.8);
  }

  60% {
    transform: translate3d(-150%, 0, 4px) scale(1);
  }

  100% {
    transform: translate3d(0, 0, 4px) scale(1);
  }
}

@keyframes sortback-right {
  0% {
    transform: translate3d(0, 0, 4px) scale(1);
  }

  50% {
    transform: translate3d(150%, 0, 4px) scale(1);
  }

  60% {
    transform: translate3d(150%, 0, 0) scale(0.8);
  }

  100% {
    transform: translate3d(0, 0, 0) scale(0.8);
  }
}

@keyframes sortfront-right {
  0% {
    transform: translate3d(0, 0, 0) scale(0.8);
  }

  50% {
    transform: translate3d(150%, 0, 0) scale(0.8);
  }

  60% {
    transform: translate3d(150%, 0, 4px) scale(1);
  }

  100% {
    transform: translate3d(0, 0, 4px) scale(1);
  }
}