#premier-carousel {
    position: fixed;
    height: 100vh;
    width: 100vw;
}

#premier-carousel .carousel-inner {
    width: 100%;
    height: 100%;
    background-color: black;
}
#premier-carousel .carousel-item {
    transition: opacity 1s ease-in-out;
    width: 100%;
    height: 100%;
}

/* adapt to screen */
@media screen and (max-aspect-ratio: 3/2) {
    #premier-carousel .carousel-inner {
        width: 100%;
    }
    #premier-carousel .carousel-item {
        height: 100%;
        left: 50%;
    }
    #premier-carousel img {
        height: 100%;
        transform: translateX(-50%);
        -webkit-transform: translateX(-50%);
    }
}
@media screen and (min-aspect-ratio: 3/2) {
    #premier-carousel .carousel-inner {
        height: 100%;
    }
    #premier-carousel .carousel-item {
        width: 100%;
        top: 50%;
    }
    #premier-carousel img {
        width: 100%;
        transform: translateY(-50%);
        -webkit-transform: translateY(-50%);
    }
}