website/assets/sass/carousel.scss

// FROM https://css-tricks.com/css-only-carousel/

@keyframes tonext {
75% {
    left: 0;
}
95% {
    left: 100%;
}
98% {
    left: 100%;
}
99% {
    left: 0;
}
}

@keyframes tostart {
75% {
    left: 0;
}
95% {
    left: -300%;
}
98% {
    left: -300%;
}
99% {
    left: 0;
}
}

@keyframes snap {
96% {
    scroll-snap-align: center;
}
97% {
    scroll-snap-align: none;
}
99% {
    scroll-snap-align: none;
}
100% {
    scroll-snap-align: center;
}
}

* {
    box-sizing: border-box;
    scrollbar-color: transparent transparent; /* thumb and track color */
    scrollbar-width: 0px;
}

*::-webkit-scrollbar {
    width: 0;
}

*::-webkit-scrollbar-track {
    background: transparent;
}

*::-webkit-scrollbar-thumb {
    background: transparent;
    border: none;
}

* {
    -ms-overflow-style: none;
}

$height: 30rem;

.carousel {
    ol, li {
        list-style: none;
        margin: 0;
        padding: 0;
    }

    position: relative;
    filter: drop-shadow(0 0 10px #0003);
    perspective: 100px;
    
    // define the height of the whole carousel
    height: $height;

}

.carousel__viewport {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    display: flex;
    overflow-x: scroll;
    counter-reset: item;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
}

.carousel__slide {
    position: relative;
    flex: 0 0 100%;
    width: 100%;
    counter-increment: item;
}

// .carousel__slide:nth-child(even) {
//     background-color: #99f;
// }

.carousel__slide:before {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate3d(-50%,-40%,70px);
    color: #fff;
    font-size: 2em;
}

.carousel__snapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    scroll-snap-align: center;
}

// @media (hover: hover) {
//   .carousel__snapper {
//     animation-name: tonext, snap;
//     animation-timing-function: ease;
//     animation-duration: 4s;
//     animation-iteration-count: infinite;
//   }

//   .carousel__slide:last-child .carousel__snapper {
//     animation-name: tostart, snap;
//   }
// }

@media (prefers-reduced-motion: reduce) {
    .carousel__snapper {
        animation-name: none;
    }
}

.carousel:hover .carousel__snapper,
.carousel:focus-within .carousel__snapper {
    animation-name: none;
}

.carousel__navigation {
    position: absolute;
    right: 0;
    bottom: 1rem;
    left: 0;
    text-align: center;
}

.carousel__navigation-list,
.carousel__navigation-item {
    display: flex;
    justify-content: center;
}

.carousel__navigation-button {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    background-color: rgba(51, 51, 51, 0.7);
    background-clip: content-box;
    border: 0.25rem solid transparent;
    border-radius: 50%;
    font-size: 0;
    transition: transform 0.1s;
}

.carousel::before,
.carousel::after,
.carousel__prev,
.carousel__next {
    position: absolute;
    top: 0;
    width: 4rem;
    height: 4rem;
    transform: translateY($height/2 - 2rem);
    border-radius: 50%;
    font-size: 0;
    outline: 0;
}

.carousel::before,
.carousel__prev {
    left: .5rem;
}

.carousel::after,
.carousel__next {
    right: .5rem;
}

.carousel::before,
.carousel::after {
    content: '';
    z-index: 1;
    background-color: #333;
    background-size: 1.5rem 1.5rem;
    background-repeat: no-repeat;
    background-position: center center;
    color: #fff;
    font-size: 2.5rem;
    line-height: 4rem;
    text-align: center;
    pointer-events: none;
}

.carousel::before {
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolygon points='0,50 80,100 80,0' fill='%23fff'/%3E%3C/svg%3E");
}

.carousel::after {
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolygon points='100,50 20,100 20,0' fill='%23fff'/%3E%3C/svg%3E");
}

.carousel__navigation-item {
    display: flex;
    align-items: center;
}

.carousel__navigation-item.enabled {
    .carousel__navigation-button {
        opacity: 0.5;
        background-color: #eeeeee;
        box-shadow: inset 0 0 2px black;
    }
}