.slider {
    overflow-x: auto;
    white-space: nowrap;

    ul {
        display: inline;
    }
}

@keyframes slidy {
    0% { left: 0%; }
    20% { left: 0%; }
    25% { left: -100%; }
    45% { left: -100%; }
    50% { left: -200%; }
    70% { left: -200%; }
    75% { left: -300%; }
    95% { left: -300%; }
    100% { left: -400%; }
}

div.slider-1 {
    overflow: hidden;

    figure {
        position: relative;
        width: 500%;
        margin: 0;
        left: 0;
        text-align: left;
        font-size: 0;
        animation: 30s slidy infinite;

        img {
            width: 20%; float: left;
        }
    }
}

.slider-2 {
    width: 100%;
    position: relative;
    text-align: center;

    > img {
        width: 100%;
        position: absolute;
        left: 0; top: 0;
        transition: all 0.5s;
    }

    input {
        display: none;

        &:checked+label {
            border-color: #666;
            opacity: 1;

            +img {
                opacity: 1;
                transform: scale(1);
            }
        }

         ~ img {
            opacity: 0;
            transform: scale(0.9);
        }
    }

    label {
        display: inline-block;
        margin-top: calc(50% + 15px);
        margin-left: 15px;
        border: 3px solid #999;
        cursor: pointer;
        opacity: 0.6;

        img{
            display: block;
        }
    }
}

.slider-3 {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;

    .icon-cards {
        position: relative;
        width: 60vw;
        height: 40vw;
        max-width: 380px;
        max-height: 250px;
        margin: 0;
        perspective: 1000px;

        &-content {
            position: absolute;
            width: 100%;
            height: 100%;
            transform-style: preserve-3d;
            transform: translateZ(-30vw) rotateY(0);
            animation: carousel 30s infinite cubic-bezier(0.77, 0, 0.175, 1) forwards;
        }

        &-item {
            position: absolute;
            top: 0;
            left: 0;
            max-width: 380px;
            max-height: 250px;

            &:nth-child(1) {
                transform: rotateY(0) translateZ(35vw);
            }

            &:nth-child(2) {
                transform: rotateY(120deg) translateZ(35vw);
            }

            &:nth-child(3) {
                transform: rotateY(240deg) translateZ(35vw);
            }
        }

        img {
            width: 100%;
        }
    }
}

@keyframes carousel {
    0%,  17.5%  { transform: translateZ(-35vw) rotateY(0); }
    27.5%, 45%  { transform: translateZ(-35vw) rotateY(-120deg); }
    55%, 72.5%  { transform: translateZ(-35vw) rotateY(-240deg); }
    82.5%, 100% { transform: translateZ(-35vw) rotateY(-360deg); }
}