/* Slider style */
.cd-slider {
    position: relative;
    width: 100%;
    max-width: none;
    height: 90vh;
    overflow: hidden;
}
.cd-slider.ie9 nav div span {
    display: none;
}
.cd-slider ul li {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    visibility: hidden;
    transition: visibility 0s .6s;
}
.cd-slider ul li::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: 100%;
    width: 135vh;
    height: 135vh;
    border: solid rgba(0,0,0,.5);
    border-width: 0;
    transform: translate(-50%, -50%);
    pointer-events: none;
    transition: border-width .4s .6s;
}
.content {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-position: 50% 100%;
    background-size: auto 100%;
    background-repeat: no-repeat;
    mix-blend-mode: screen;
    opacity: 0;
    transform: scale(1.2);
    transition: opacity .4s .6s, transform .4s .6s;
}
.content blockquote {
    position: absolute;
    bottom: 10%;
    left: 4%;
    z-index: 2;
}
.content blockquote img {
    width: 200px;
    margin-bottom: 20px;
}
/* current slide
---------------------------------*/
.cd-slider li.current_slide {
    visibility: visible;
}
.cd-slider li.current_slide::before {
    border-width: 16rem;
}
.cd-slider li.current_slide .content {
    opacity: 1;
    transform: scale(1);
}
/* nav
---------------------------------*/
nav div {
    position: absolute;
    top: 50%;
    left: 4%;
    width: 40px;
    height: 40px;
    margin-top: -2.5rem;
    list-style: none;
}
nav div:last-of-type {
    left: auto;
    right: 4%;
}
.prev, .next {
    position: relative;
    z-index: 100;
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 100%;
    transition: box-shadow .3s;
}
.prev::before, .prev::after, .next::before, .next::after {
    content: '';
    position: absolute;
    left: 43%;
    background: #fff;
    width: .4rem;
    min-width: 3px;
    border-radius: 3px;
    height: 34%;
}
.prev::before {
    transform: rotate(45deg);
    top: 24%;
}
.prev::after {
    transform: rotate(-45deg);
    bottom: 24%;
}
.next::before, .next::after {
    left: auto;
    right: 43%;
}
.next::before {
    transform: rotate(-45deg);
    top: 24%;
}
.next::after {
    transform: rotate(45deg);
    bottom: 24%;
}
.prev:hover, .next:hover {
    box-shadow: 0 0 0 1rem rgba(0, 0, 0, 0.15);
}
nav > div > span {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 100%;
    z-index: 5;
    pointer-events: none;
    will-change: width, height;
    transform: translate(-50%, -50%);
    transition: width .6s, height .6s;
}