html{
    scroll-behavior: smooth;
}
body{
    margin: 0;
    padding: 0;
    font-family:"Montserrat", georgia, Helvetica, sans-serif; 
    color: #333;
    background-color: #f4f4f4;
}
nav{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    border-bottom: 5px solid #3498db;
}
nav h1{
    color: #2c3e50;
    font-family: 'Roboto',sans-serif;
    font-size: 40px;
    font-weight: bold;
}
nav div.onglets{
    margin-top: 3px;
    margin-left: 300px;
}
nav div.onglets a{
    text-decoration: none;
    color: #3498db;
    margin-right: 10px;
    border-bottom: 1px solid #3498db;
    padding-bottom: 5px;
}
header{
    display: flex;
    flex-direction: column;
    align-items: center;
    background: #2c3e50;
    background-size: cover;
    color: white;
    padding: 40px;
}
header h1{
    font-family: 'Roboto',sans-serif;
    font-size: 50px;
    margin-bottom: 0px;
    font-weight: bold;
}
header h2{
    font-size: 20px;
    margin-top: 15px;
    text-align: center;
    border-bottom: 1px solid white;
}
header button{
    padding: 10px 20px;
    border: none;
    font-size: 20px;
    font-family: 'Roboto',sans-serif;
    cursor: pointer;
}
section.principale{
    margin-top: 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
}
.principale .content .carte .droite img{
    height: 300px;
    width: 400px;
    margin-top: 5px;
    border: 1px solid #ddd;
}
.principale .content .carte{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 20px;
}
.principale .content .carte .gauche{
    flex: 0 0 30%;
    padding: 20px;
    background-color: #ffffff;
    color: #333;
    border: 1px solid #ddd;
}
.principale .content .carte.droite{
    flex: 0 0 70%;
}
footer{
    margin-top: 40px;
    border-top: 5px solid #3498db;
    background-color: #34495e;
    color: white;
    padding: 30px 100px;
}
footer h1{
    font-family: 'Roboto',sans-serif;
    border-bottom: 1px solid #7f8c8d;
    width: 20%;
    padding-bottom: 5px;
    margin-bottom: 0;
}
footer .services{
    margin-top: 0px;
    flex-wrap: wrap;
    display: flex;
    flex-direction: row;
}
footer .services .service{
    margin-right: 30px;
    padding: 10px;
}
footer .services .service p{
    max-width: 300px;
}
footer #contact{
    color: #bdc3c7;
}
footer .services .service h2{
    font-size: 20px;
}
@media screen and (max-width:680px) {
    nav div.onglets{
        margin-left: 0px;
        margin-bottom: 20px;
        margin-top: 0px;
    }
    .principale .carte{
        margin: 10px;
    }
    .principale .content .carte .droite img{
        height: 400px;
        width: 100%;
        margin-top: 0px;
    }
    .principale .content .carte{
        display: block;
    }
    footer{
        padding: 30px;
    }
}