css find the precious

*{
    margin: 0px;
    padding: 0px;
}

nav{
    color:white;
    background-color: #4F4F4F;
}

li{
    padding: 10px;
    list-style: none;
}

ul{
    display: flex;
}

span{
    font-size: 20px;
}

section h2{
    text-align: center;
}



/*  FORMULAIRE */

form h2{
    text-align: left;
    margin-left: 20px;
    margin-bottom: 30px;
}
form{
    text-align: center;
    display: block;
}

input, textarea{
    margin-bottom: 10px;
    width: 80%;
}

textarea{
    height: 100px;
}