*{
    box-sizing: border-box;
    list-style: none;
    text-decoration: none;
    margin: 0;
}

body{
    background: lightgray;
}

#slider{
    position: relative;
    width: 100%;
    height: 100vh;
}

#slider img{
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    transition: opacity 800ms;

    opacity: 0;
}

#slider img.selected{
    opacity: 1;
}

.radioCB{
    position: fixed;
    bottom: 0;
    right: 0;
}