body,html{
    height: 100%;
    font-family: Arial, sans-serif;
    font-size: 15px;
    margin: 0;
}

img{
    display: inline-block;
    height: 225px;
    width: 400px;
}

.background{
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

#main_bg{
    height: 100%;
    background-image: url("../img/fond_accueil.png");
    opacity: 85%;
}

#main_bg > div {
    text-align: center;
    position: absolute;
    top: 50%;
    width: 100%;
}

#accueil_titre{
    padding: 5px 5px 5px 5px;
    font-size: 41px;
    border: solid;
    border-width: 3px 3px;
    background-color: #949494;
}

#presentation{
    position: relative;
    background-color: #1f1f1f;
    color: white;
    padding: 10px 0px 10px 10px;
    margin: 10px 0px 10px 0px;
}

#second_bg{
    height: 100%;
    background-image: url("../img/fond_accueil2.jpg");
    opacity: 85%;
}

#second_bg > div{
    padding: 150px 0 0 35%;
}

form{
    background-color: lightgrey;
    margin: 0 auto;
    padding: 50px;
    width: 400px;
    height: 250px;
    border: 5px solid grey;
    border-radius: 1em;
    display: inline-block;
}

form > h2{
    margin: 0 auto;
    padding: 10px 0px 20px 0px;
}

input[type="text"], input[type="password"]{
    padding: 6px 10px;
    margin: 5px 0;
    width: 100%;
    border: 1px solid grey;
}


input[type="submit"]{
    color: white;
    border-radius: 10px;
    background-color: grey;
    width: 100px;
    height: 25px;
    margin: 20px 0px 0px 150px;
}

#libre{
    color: black;
    padding-left: 80%;
}

form > ul{
    padding-top: 40px;
}

footer{
    height: 50px;
    background-color: #949494;
}

.mention{
    padding-top: 20px;
    text-align: center;
}