_carousel.scss

$carousel-col-primary: #F6A43E;
$carousel-col-secondary: #487D75;
$carousel-col-accent: #CCE1D1;

$panels: (3, '.has-three-panels'),
        (4, '.has-four-panels');

@each $num, $class-name in $panels {
  @for $i from 1 through $num {
    $x: 0;

    @if $i > 1 {
      $x: (100 / $num) * ($i - 1);
    }

    // add transition to carousel panes
    .carousel__input:nth-of-type(#{$i}):checked ~ .carousel__display #{$class-name} {
      transform: translateX(#{-$x}#{%});
    }

    // display carousel panes when associated input is checked
    .carousel__input:nth-of-type(#{$i}):checked ~ .carousel__display .carousel__control--prev:nth-of-type(#{$i}),
    .carousel__input:nth-of-type(#{$i}):checked ~ .carousel__display .carousel__control--next:nth-of-type(#{$i}) {
      display: block;
    }

    // style bullets when associated input is checked
    .carousel__input:nth-of-type(#{$i}):checked ~ .carousel__controls--round .carousel__control--round:nth-of-type(#{$i}) {
      background-color: $carousel-col-primary;
    }
  }
}

.carousel__display {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-around;
  max-width: 55rem;
  margin: 1.5rem auto;
}

.control-wrap {
  margin: 0 1.5rem;
}

.carousel__controls--next {
  order: 3;
}

.carousel__control--prev,
.carousel__control--next {
  display: none;
}

.carousel__control--next {
  transform: scaleX(-1);
}

/* SVG control styles */

#controls--arrow polyline {
  stroke: inherit;
  stroke-width: inherit;
}

.carousel__control-arrow {
  width: 2rem;
  height: 2rem;
  pointer-events: none;
  stroke: $carousel-col-secondary;
  stroke-width: 0.2rem;
  transition: stroke 0.3s ease-in-out, stroke-width 0.3s ease-in-out;
}

.carousel__control--prev:hover .carousel__control-arrow,
.carousel__control--next:hover .carousel__control-arrow {
  stroke: $carousel-col-primary;
  stroke-width: 0.14em;
}

.carousel__control--prev:active .carousel__control-arrow,
.carousel__control--next:active .carousel__control-arrow{
  transform: scale(.85);
  stroke: $carousel-col-accent;
  stroke-width: 0.14em;
}


.carousel__control--next:active .project__controls--arrow_right {
  transform: scaleX(-1) scale(.85);
}

.carousel__panels {
  max-width: 40rem;
  overflow: hidden;
}

.carousel__panel-wrap {
  display: flex;
  height: 25rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0;
  transition: transform  800ms cubic-bezier(0.075, 0.82, 0.165, 1);
}

.carousel__panel {
  flex: 1;
  height: inherit;
  background-color: $carousel-col-accent;
}

.carousel__figure {
  height: inherit;
  margin: 0;
  padding: 0;
}

.carousel__figure img {
  max-width: 100%;
  display: block;
}

@supports (object-fit: cover) {
  .carousel__figure img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
}

.carousel__controls--round {
  text-align: center;
}

.carousel__control--round {
  display: inline-block;
  padding: 0.5rem;
  width: 1.15rem;
  height: 1.15rem;
  background-color: $carousel-col-accent;
  border-radius: 50%;
  transition: background 250ms ease-in-out;
}

.carousel__control--round:not(:first-child) {
  margin-left: 0.3rem;
}

.carousel-desc {
  max-width: 40rem;
  margin: auto;
  padding: 1.5rem .25rem;

  &__title {
    display: inline-block;
    margin-top: 0;
    margin-bottom: .5rem;
    padding-bottom: .15em;
    border-bottom: 2px solid $carousel-col-primary;
    color: $carousel-col-secondary;
    font-size: 1.6rem;
    font-weight: 200;
  }
}

@media screen and (max-width: 650px) {
  .control-wrap {
    position: absolute;
    top: 50%;
    padding: .75rem;
    margin: 0;
    z-index: 3;
    background-color: hsla(240, 40%, 0%, .4);
    transform: translateY(-50%);
    transition: background-color 300ms ease-out;

    &:hover {
      background-color: hsla(240, 40%, 0%, .6);
    }

  }

  .carousel__controls {
    &--prev {
      left: 0;
    }

    &--next {
      right: 0;
    }
  }

  .carousel__control-arrow {
    stroke: $carousel-col-accent;
  }

  .control-wrap:hover .carousel__control-arrow {
    stroke: $carousel-col-primary;
    stroke-width: 0.25rem;
  }

  .carousel-desc {
    padding: 1.5rem;
  }

}