body {
    background-image: url('fond/fond.jpg');
    background-repeat: no-repeat;
    background-position: center center;
    background-attachment: fixed;
    background-size: cover;
    margin: 0;
    font-family: 'police_principale';
    overflow-x: hidden;
}
@font-face {
    font-family: 'police_principale';
    src: url('police/police_principale.woff') format('woff');
}
.bloc1::before {    /* before sur le bloc1 = sans contenu + largeur 100% + position absolue + hauteur 100% + couleur de fond spé + z-index au dessus de la video */
    content: "";
    width: 100%;
    position: absolute;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.41);
    z-index: 0;
}
.responsive_bar {   /* en ligne + position absolue + espace 20px + couleur de fond spé + largeur 100% */
    display: inline;
    position: absolute;
    background-color: rgba(0, 0, 0, 0.45);
    width: 100%;
    z-index: 150;
    height: 65px;
}
.responsive_bar button {    /* marge entre eux 12px + fond en darkgrey + bordure de 2px noire + arrondi de 8px + taille 25px + largeur 288px + hauteur 35px */
    margin: 0 12px;
    background-color: rgba(169, 169, 169, 0.368);
    border: 2px solid black;
    border-radius: 8px;
    font-size: 19px;
    width: 230px;
    height: 35px;
    margin-bottom: 10px;
    margin-top: 10px;
}
.logo_veloclub {    /* -2px du haut + position en absolue + a 50px de la droite */
    position: absolute;
    right: 0px;
    float: right;
    top: -8px;
    z-index: 1000;
}
.responsive_bar button:hover {  /* quand survolé = curseur passe en pointeur */
    cursor: pointer;
}
.lien1, .lien2, .lien3, .lien4, .lien5 { /* pas de décoration de texte + écrit en blanc */
    text-decoration: none;
    color: white;
}
.lien3 {
    color: black;
}
.bloc {
    position: absolute;
    background-color: rgba(255, 255, 255, 0.729);
    width: 880px;
    border: 5px solid black;
    left: 350px;
    right: 350px;
    top: 80px;
}
.titre_principal {
    text-align: center;
    text-decoration: underline;
}
.alt {
    font-size: 25px;
}
.logo_veloclub {
    float: right;
    cursor: pointer;
}
.center {
    text-align: center;
    object-position: center;
}
.sponsors6_electrolift img {
    width: 500px;
    height: 300px;
}
.sponsors7_uExpress img {
    width: 650px;
    height: 300px;
}

.sponsors11_razurIt img {
    width: 650px;
}

.sponsors12_Cordonnerie img {
    width: 650px;
}

.voitureClubArriere img, .voitureClub img {
    width: 600px;
}

.team img {
    width: 600px;
}

.menu_hamburger {
    display: none;
}

@media screen and (max-width: 1550px) {
    .responsive_bar button {
        font-size: 17px;
        display: flex;
        flex-direction: row;
        margin-left: 100px;
    }
    .responsive_bar {
        height: 28vh;
    }
    .bloc {
        margin-top: 180px;
    }
}
@media screen and (max-width: 900px) {
    .logo_veloclub {
        display: block;
        position: relative;
        float: left;
        margin-top: 20px;
        margin-left: 15px;
        z-index: 1000;
    }
    .responsive_bar button {
        display: flex;
        flex-direction: column;
        background-color: red;
    }
    .menu_hamburger {
        display: block;
        position: absolute;
        top: -5px;
        right: -12px;
        z-index: 1000;
    }
    .responsive_bar {
        top: 50px;
        height: 100%;
        width: 100%;
        left: 0px;
        top: 0px;
        backdrop-filter: blur(8px);
        margin-left: -110%;
        transition: all 0.3s ease;
    }
    .responsive_bar.mobile_menu {
        margin-left: 0;
        height: 350vh;
    }
    .responsive_bar button {
        margin: auto;
        margin-top: 25px;
        font-size: 17px;
        width: 200px;
        height: 50px;
        background-color: red;
    }
    .responsive_bar .jour_des_sorties {
        margin-top: 170px;
    }
    .bloc {
        margin: auto;
        left: 10px;
        width: 340px;
        margin-top: 70px;
    }
    .bloc .sponsors1_RCM img {
        width: 280px;
        height: 80px;
    }
    .bloc .sponsors2_mentonPub img {
        width: 280px;
        height: 200px;
    }
    .bloc .sponsors3_coiffure img {
        width: 280px;
        height: 280px;
    }
    .bloc .sponsors4_essoStade img {
        width: 280px;
        height: 200px;
    }
    .bloc .sponsors5_picca img {
        width: 280px;
        height: 280px;
    }
    .bloc .sponsors6_electrolift img {
        width: 280px;
        height: 190px;
    }
    .bloc .sponsors7_uExpress img {
        width: 280px;
        height: 140px;
    }
    .bloc .sponsors9_cesariAssurance img {
        width: 280px;
        height: 130px;
    }
    .bloc .sponsors10_easyMenton img {
        width: 280px;
        height: 200px;
    }
    .bloc .voitureClub img {
        width: 280px;
    }
    .voitureClubArriere img {
        width: 280px;
    }
    .team img {
        width: 280px;
    }
    .bloc .sponsors11_razurIt img {
        width: 280px;
    }
    
    .bloc .sponsors12_Cordonnerie img {
        width: 280px;
    }

    body {
        background-image: none;
        background: linear-gradient(to right, yellow, red);
    }
}