* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: #000;
}

.slider{
    height: 100vh;
    width: 100vw;
    position: relative;
}
.slider__item{
    height: 100%;
    width: 100%;
    position: absolute;
    opacity: 0;
    transition: 0.5s;
}
.slider__item.active{
    opacity: 1;
    z-index: 1;
}
.slider__image{
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slider__next{
    height: 100%;
    width: 10%;
    position: absolute;
    top: 0;
    z-index: 2;
    right: 0;
    background: linear-gradient(to right, transparent, royalblue);
    border:none;
    outline:none;
}
.slider__prev{
    height: 100%;
    width: 10%;
    position: absolute;
    top: 0;
    z-index: 2;
    left: 0;
    background: linear-gradient(to left, transparent, royalblue);
    border:none;
    outline:none;
}