form {
    width: 450px;
    margin: auto;
    background: rgba(0,0,0,0.4);
    padding: 10px 20px;
    box-sizing: border-box;
    margin-top: 200px;
    border-radius: 7px;
}

h1 {
    color: white;
    text-align: center;
    font-size: 30px;
    margin-bottom: 20px;
}

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

textarea {
 
    min-height: 100px;
    max-width: 100%;
    min-width: 100%;
    margin-bottom: 20px;
    font-size: 17px;
    
}

#boton{
    background: #31384A;
    color: #fff;
    padding: 20px;
   

}

#boton:hover {
    cursor: pointer;
}

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