// Notes on the classes:
//
// 1. .carousel.pointer-event should ideally be pan-y (to allow for users to scroll vertically)
//    even when their scroll action started on a carousel, but for compatibility (with Firefox)
//    we're preventing all actions instead
// 2. The .carousel-item-left and .carousel-item-right is used to indicate where
//    the active slide is heading.
// 3. .active.carousel-item is the current slide.
// 4. .active.carousel-item-left and .active.carousel-item-right is the current
//    slide in its in-transition state. Only one of these occurs at a time.
// 5. .carousel-item-next.carousel-item-left and .carousel-item-prev.carousel-item-right
//    is the upcoming slide in transition.

.carousel {
    position: relative;
}

.carousel.pointer-event {
    touch-action: pan-y;
}

.carousel-inner {
    position: relative;
    width: 100%;
    overflow: hidden;
    @include clearfix();
}

.carousel-item {
    position: relative;
    display: none;
    float: left;
    width: 100%;
    margin-right: -100%;
    backface-visibility: hidden;
    @include transition($carousel-transition);
}

.carousel-item.active,
.carousel-item-next,
.carousel-item-prev {
    display: block;
}

.carousel-item-next:not(.carousel-item-left),
.active.carousel-item-right {
    transform: translateX(100%);
}

.carousel-item-prev:not(.carousel-item-right),
.active.carousel-item-left {
    transform: translateX(-100%);
}

//
// Alternate transitions
//

.carousel-fade {
    .carousel-item {
        opacity: 0;
        transition-property: opacity;
        transform: none;
    }

    .carousel-item.active,
    .carousel-item-next.carousel-item-left,
    .carousel-item-prev.carousel-item-right {
        z-index: 1;
        opacity: 1;
    }

    .active.carousel-item-left,
    .active.carousel-item-right {
        z-index: 0;
        opacity: 0;
        @include transition(opacity 0s $carousel-transition-duration);
    }
}

//
// Left/right controls for nav
//

.carousel-control-prev,
.carousel-control-next {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 1;
    // Use flex for alignment (1-3)
    display: flex; // 1. allow flex styles
    align-items: center; // 2. vertically center contents
    justify-content: center; // 3. horizontally center contents
    width: $carousel-control-width;
    color: $carousel-control-color;
    text-align: center;
    opacity: $carousel-control-opacity;
    @include transition($carousel-control-transition);
    // Hover/focus state
    @include hover-focus() {
        color: $carousel-control-color;
        text-decoration: none;
        outline: 0;
        opacity: $carousel-control-hover-opacity;
    }
}

.carousel-control-prev {
    left: 0;

    @if $enable-gradients {
        background-image: linear-gradient(90deg, rgba($black, .25), rgba($black, .001));
    }
}

.carousel-control-next {
    right: 0;

    @if $enable-gradients {
        background-image: linear-gradient(270deg, rgba($black, .25), rgba($black, .001));
    }
}

// Icons for within
.carousel-control-prev-icon,
.carousel-control-next-icon {
    display: inline-block;
    width: $carousel-control-icon-width;
    height: $carousel-control-icon-width;
    background: no-repeat 50% / 100% 100%;
}

.carousel-control-prev-icon {
    background-image: escape-svg($carousel-control-prev-icon-bg);
}

.carousel-control-next-icon {
    background-image: escape-svg($carousel-control-next-icon-bg);
}

// Optional indicator pips
//
// Add an ordered list with the following class and add a list item for each
// slide your carousel holds.

.carousel-indicators {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 15;
    display: flex;
    justify-content: center;
    padding-left: 0; // override <ol> default
    // Use the .carousel-control's width as margin so we don't overlay those
    margin-right: $carousel-control-width;
    margin-left: $carousel-control-width;
    list-style: none;

    li {
        box-sizing: content-box;
        flex: 0 1 auto;
        width: $carousel-indicator-width;
        height: $carousel-indicator-height;
        margin-right: $carousel-indicator-spacer;
        margin-left: $carousel-indicator-spacer;
        text-indent: -999px;
        cursor: pointer;
        background-color: $carousel-indicator-active-bg;
        background-clip: padding-box;
        // Use transparent borders to increase the hit area by 10px on top and bottom.
        border-top: $carousel-indicator-hit-area-height solid transparent;
        border-bottom: $carousel-indicator-hit-area-height solid transparent;
        opacity: .5;
        @include transition($carousel-indicator-transition);
    }

    .active {
        opacity: 1;
    }
}

// Optional captions
//
//

.carousel-caption {
    position: absolute;
    right: (100% - $carousel-caption-width) / 2;
    bottom: 20px;
    left: (100% - $carousel-caption-width) / 2;
    z-index: 10;
    padding-top: 20px;
    padding-bottom: 20px;
    color: $carousel-caption-color;
    text-align: center;
}