.container {
    height: 90vh;
}

img {
    margin: auto;
    border: 6px solid #617F86;
    border-radius: 10px;
}


/******************/
/*écrans de bureau*/
/******************/
@media (min-width: 1401px) {
    main>div {
        padding-top: 5vh !important;
    }

    .carousel-control-next {
        right: 10vw;
    }

    .carousel-control-prev {
        left: 10vw;
    }

    img {
        height: 70vh;
    }
}

/************************************/
/*tablettes et ordinateurs portables*/
/************************************/
@media (min-width: 601px) and (max-width: 1400px) {
    main>div {
        padding-top: 5vh !important;
    }

    .carousel-control-next {
        right: 10vw;
    }

    .carousel-control-prev {
        left: 10vw;
    }

    img {
        height: 60vh;
    }
}

/*************/
/*smartphones*/
/*************/
@media (max-width: 600px) {
    main>div {
        padding-top: 7vh !important;
    }

    .carousel-control-next {
        right: 0;
    }

    .carousel-control-prev {
        left: 0;
    }

    img {
        height: 50vh;
    }
}