@media (max-width:767px) {

    .compteur {
        font-size: 20px;
    }

    .container {
        width: 100%;
    }

    .main-content {
        width: 350px;
        min-height: 400px;
        display: block;
        margin-left: auto;
        margin-right: auto;
    }

    .main-content-sub {
        min-height: 400px;
        font-size: 18px;
    }

    img {
        width: 70%;
    }
}