html, body {
    margin: 0;
    padding: 0;
}
* {
    box-sizing: border-box;
}
.slider {
/*        width: 50%;*/
    margin: 10px auto;
}
.slick-slide {
    margin: 0px 3px;
}
.slick-slide img {
    width: 100%;
}
.slick-prev:before,
.slick-next:before {
    color: black;
}
.slick-slide {
    transition: all ease-in-out .3s;
/*    opacity: .9;*/
}
.slick-active {
    opacity: .5;
}
.slick-current {
    opacity: 1;
}