form{
    width: 450px;
    margin: auto;
    background: rgba(0,0,0,0.2);
    padding: 30px 20px;
    box-sizing: border-box;
  
    border-radius: 7px;
}

input, textarea{
    width: 100%;
    margin-bottom: 20px;
    padding: 7px;
    box-sizing: border-box;
    font-size: 17px;
    border: none;
}

textarea{
    min-height: 100px;
    max-height: 200px;
    max-width: 100%;
}

#boton{
    background: #31384a;
    color: #fff;
    padding: 20px;
    width: 410px;
    font-size: 17px;
}

#boton:hover{
    cursor: pointer;
}

@media (max-width:480px){
    form{
        width: 100%;
    }
}

@media (max-width:480px){
    #boton{
        width: 100%;
    }
}