.cover-slider__wrap {
    position: relative;
    max-width: 640px;
    height: 480px;
    margin: 2em auto;
    padding: 5em 1em;
    color: #fff;
    line-height: 2;
    font-family: 'Trebuchet MS', sans-serif;
    font-weight: bold;
    box-shadow: 0 0 .5em rgba(#000,.5);
}
.cover-slider__inner {
    position: relative;
    min-height: 40em;
    text-align: center;
    z-index: 10;
}
.cover-slider {
    backface-visibility: hidden;
}
.cover-slider__slide.active {
    animation-duration: 2500ms;
    animation-name: slidein;
    animation-fill-mode: forwards;
}
.cover-slider__slide.inactive {
    animation-duration: 2500ms;
    animation-name: slideout;
    animation-fill-mode: forwards;
}

@keyframes slidein {
    from {
        left: 0;
        right: 100%;
    }
    to {
        left: 0;
        right: 0;
    }
}
@keyframes slideout {
    from {
        left: 0;
        right: 0;
    }
    to {
        left: 100%;
        right: 0;
    }
}

.cover-slider__slide {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 100%;
    padding: 0;
    margin: 0;
    background-size: cover;
    background-position: center;
    list-style: none;
    z-index: 0;
}

.hide {
    position: absolute;
    left: -9999px;
}