@media (min-width: 768px) and (max-width: 992px) {


    header {
        display: none;
    }

    .part-one-section {
        flex-direction: column;
        justify-content: center;
        display: flex;
        align-items: center;
        text-align: center;
        margin-top: 48px;
    }

    .cercle {
        margin: 0;
        justify-content: center;
        align-items: center;
        display: flex;
    }

    .li-txt {
        text-align: center;
    }

    .li-txt-last {
        text-align: center;
    }

    .part-one-text-section {
        margin-left: 0;
    }

    .part-left {
        margin-left: 0;
        margin-right: 0;
        text-align: center;
    }

    .strong-txt {
        justify-content: center;
        text-align: center;
        display: flex;
    }

    .text-section-right {
        margin-left: 16px;
        margin-right: 16px;
        text-align: center;
    }

    .text-section-left {
        margin-left: 16px;
        margin-right: 16px;
        text-align: center;
    }

    .text-section-center {
        margin-left: 16px;
        margin-right: 16px;
        text-align: center;
    }

    .part-right {
        margin-left: 0;
        margin-right: 0;
        text-align: center;
    }

    .title-section-right {
        margin-right: 16px;
        margin-left: 16px;
        text-align: center;
        display: flex;
        justify-content: center;
    }

    .title-section-left {
        margin-right: 16px;
        margin-left: 16px;
        text-align: center;
    }

    .part-Forms {
        justify-content: center;
        flex-direction: column;
        display: flex;
        margin-left: 16px;
        margin-right: 16px;
    }

    .form-row {
        flex-direction: column;
    }

    input {
        width: 100%;
    }

    .object {
        width: 100%;
    }

    .submit {
        width: 100%;
    }

    #object {
        width: 100%;
    }

    #message {
        width: 100%;
    }

    .submit {
        justify-content: center;
        display: flex;
    }

    .txt-section-right {
        text-align: center;
    }

    .from-column-last {
        text-align: center;
        width: 100%;
    }

    .obj {
        width: 100%;
    }

    .msg {
        width: 100%;
    }

    .menu-burger {
        display: block;
    }


    /*vidéo*/


    .container-video {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        margin-top: 16px;
    }

    .video-list {
        flex-direction: column;
        overflow-x: hidden;
        overflow-y: hidden;
        white-space: nowrap;
        width: auto;
        margin: auto;
        margin-left: 74px;
        margin-right: 74px;
    }

    .video {
        margin-right: 10px;
        border-bottom: none;
        border-right: 1px solid #ccc;
    }

    .video:last-child {
        margin-right: 0;
        border-right: none;
    }

    .video-thumbnail {
        width: 80px;
        height: 100%;
        object-fit: cover;
    }

    .video-title {
        width: 80px;
    }

    .main-video {
        display: flex;
        justify-content: center;
        margin: 0 16px;
    }


    .logo-qvt {

        .img {
            width: 380px;
        }
    }

    .img-logo-qvt {
        width: 540px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: auto;
        margin-bottom: 100px;
    }

    .qvt-logo{
        margin-top: 0;
    }

}