style.css

form{
    width: 30%;
    height: 330px;
    border:1px solid black;
    margin-top: 5%;
    margin-left: 35%;
    margin-bottom: 10%;
    padding-top: 3%;
}
#h{
    display: inline;
    color: red;
}
.input{
    margin-top: 10px;
    margin-left: 24%;
    display: block;
}
label{
    display: block;
    margin-left: 25%;
}
.calibre{
    
    margin-left: 23%;
    margin-top: 5%;
}
.submit{
    margin-top: 5%;
    margin-left: 50%;
    height: 40px;
    width: 100px;
}
.calibre2{
    margin-left: 5%;
    margin-top: 20px;
}.calibre3{
    margin-left: 5%;
    margin-top: 20px;
}
.submit{
    display: block;
}
.input2{
    margin-top: 10px;
}
.input3{
    margin-top: 10px;
    width: 190px;
    height: 30px;
    display: block;
}
.input4{
    margin-top: 10px;
    width: 100px;
    display: block;
    border:1px solid black;
    background-color: black;
    color: wheat;
    margin-left: 90px;
}
@media  (max-width: 814px){
    .width{
        width: 100%;
    }
    .position{
        display: block;
    }
    .position2{
        display: block;
    }
    .position3{
        display: block;
    }
    .position4{
        display: block;
    }
    .position5{
        display: block;
    }
    .h7{
        display:block;
        
    }
}
@media  (max-width: 714px){
    .width{
        width: 80%;
    }
}
@media  (max-width: 414px){
    .width{
        width: 50%;
    }
}