html,body {
    margin: 0;
    padding: 0;
    background:  url('images/arriere.jpg') rgb(6, 12, 14) no-repeat center center fixed;
    background-size: cover;
    font-family: "Montserrat", sans-serif;
}
.nav_index {
    display: flex;
    top:0;
    position: fixed;
    justify-content: space-evenly;
    place-items: center;
    border-bottom: 1px solid black;
    width: 100%;
    z-index: 2;
    backdrop-filter: blur(7px);
}
.nav_index a {
    text-decoration: none;
    color: rgb(255, 255, 255);
}
.nav_index a:hover {
    color:rgb(223, 223, 223) ;
    transition: 0.3s;
}
.nav_links {
    display: flex;
    justify-content: space-evenly;
    gap: 20px;
    place-items: center;
    border: 2px solid white;
    border-radius: 50px;
    padding: 10px 20px;
}
.li {
    display: none;

}
.projet.open .li {
    position: absolute;
    top: 62px;
    display: flex;
    flex-direction: column;
    list-style-type: none;
    z-index: 10;
    padding: 10px;
    color: #000;
    background: rgba(255, 255, 255, 0.8);
}
.li li a{
    color: black;
    padding: 5px 0;
}
.li li a:hover{
    color: rgb(0, 0, 0);
}
.remplie {
    height: 80px;   
    width: 100%;
}
header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 40px;
    position: relative;
    z-index: 1;
}
.header_index {
    width: 90%;
    position: relative;
    color: white;
    text-shadow: 2px 2px 4px #000000;
    backdrop-filter: blur(15px);
    padding: 20px;
    border-radius: 20px;
}
.tout{
    display: flex;
    gap: 20px;
    backdrop-filter: blur(7px);
}
#explore a:hover{
    color: white;
    transition: 0.3s;
}
.footer_index {
    backdrop-filter: blur(7px);
    color: white;
    text-align: center;
    padding: 5px 0;
    margin-top: 10px;
    position: absolute;
    bottom: 0;
    width: 100%;
}
.footer_index a{
    text-decoration:none;
    color:white;
}

@media screen and (max-width: 600px) {
    .nav_index {
        flex-direction: column;
        gap: 10px;
    }
    .nav_links {
        width: 100%;
        justify-content: space-around;
    }
    .li {
        top: 110px;
    }
    header{
        margin: 0 10px;
        margin-top: 70px;
    }
    .tout {
        flex-direction: column;
        place-items: center;
    }
    .footer_index {
        position: relative;
    }
}