.contenaire {
    margin-top: 100px;
    width: 60%;
    margin-left: auto;
    margin-right: auto;
    display: block;
    border: 1px solid rgba(0,0,0,.1);
    border-radius: 50px;
    padding: 1em;
    box-shadow: 0 0 2px 5px rgba(0,0,0,.03);
}
.informations {
    display: flex;
    justify-content: space-evenly;
    flex-wrap: wrap;
}
.informations li {
    list-style: none;
}
.info_center {
    text-align: center;
}
img, video {
    max-width: 100%;
    height: auto;
}

@media screen and (max-width: 1300px) {
    .contenaire {
        width: 80%;
    }
}
@media screen and (max-width: 600px) {
    .contenaire {
        width: 100%;
    }
}