body{
    height:100vh;background-image: url(fond.jpg);background-position: center;
    background-size: cover
    ;background-attachment: fixed;
    /*font-family:'Indie Flower',sans-serif;*/
}
a {color:rgb(62, 0, 125);}

.back-button {width:48px;height:48px;padding:0;border:none;border-radius:24px;box-shadow:0 3px 6px rgba(0,0,0,0.16),0 3px 6px rgba(0,0,0,0.23);background-color:#eee;color:#aaa;font-size:24px;line-height:48px;text-align:center;cursor:pointer;}
.back-button svg {display:block;margin:8px;width:32px;height:32px;fill:#888;}

@media only screen and (max-device-width: 736px) {
    body{height:auto!important}
    .navbar{position:relative;width:100%}
    .navbar a{display:block;width:100%!important}
    .row{height:auto!important}
    .col-md{height:auto!important}
    .card{width:100%;max-width:auto!important}
    .card-header{width:100%}
};