h1{
     margin: 40px 0;
     text-align: center;
     font-family: "Arial";
     font-size: 24px;
 }
form{
    width: max-content;
    margin: 0 auto;

}
#espace{
    height: 100px;
}

textarea{
    width: auto;
}
@media screen and (max-width: 800px) {
    h1{
        font-size: 16px;
    }
    form{
        width: auto;
    }
    textarea{
        width: 90%;
        margin-left: 5%;
    }
    input{
        width: 90%;
        margin-left: 5%;
    }
    label{
        margin-left: 5%;
    }
}