body {
    background-image: url('fond/fond.jpg');
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
    margin: 0;
    font-family: 'police_principale';
}
@font-face {
    font-family: 'police_principale';
    src: url('police/police_principale.woff') format('woff');
}
.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;
}
.logo_veloclub a img {
    width: 190px;
    height: 50px;
}
.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;
}
.lien5 {
    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;
}
img {
    width: 700px;
}
.titre_principal {
    text-align: center;
    text-decoration: underline;
    margin-top: 10px;
}
.logo_veloclub {
    float: right;
    cursor: pointer;
    border: none;
    padding: 0;
}
.center {
    text-align: center;
    object-position: center;
}
figure {
    border: 3px solid black;
    padding: 25px;
    margin-bottom: 55px;
    background-color: rgba(30, 26, 26, 0.813);
}
figcaption {
    color: white;
}
img {
    border: 1px solid black;
}
.menu_hamburger {
    background: none;
    border: none;
    display: none;
}
.menu_burger {
    border: none;
}
.btnArchives {
    margin-top: 20px;
    font-size: 20px;
    border-radius: 8px;
    color: white;
    background: linear-gradient(to right, rgb(120, 120, 120), rgb(31, 31, 31));
    padding: 5px;
    width: 170px;
}
@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;
        font-size: 17px;
        width: 200px;
        height: 50px;
    }
    .menu_hamburger {
        display: block;
        position: absolute;
        top: -20px;
        right: -35px;
        z-index: 1000;
    }
    .menu_hamburger img {
        width: auto;
    }
    .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: 140vh;
    }
    .responsive_bar button {
        margin: auto;
        margin-top: 25px;
        font-size: 17px;
    }
    .responsive_bar .jour_des_sorties {
        margin-top: 170px;
    }
    .bloc {
        margin: auto;
        left: 10px;
        width: 320px;
    }
    .bloc figure {
        max-width: 250px;
        max-height: 280px;
        padding: 20px 20px 50px 20px;
        margin: auto;
        margin-top: 15px;
    }
    .bloc figure a img {
        max-width: 250px;
        max-height: 280px;
    }
    body {
        background-image: none;
        background: linear-gradient(to right, yellow, red);
    }
}