body {background-image:url(imagenes/Fadu2.JPG); 
    background-size: 100vw 100vh;
    background-attachment: fixed;
    margin: 0;
    font-family: monospace;
}

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;
}
        
h2 {
    color: white;
    text-align: center;
    margin: 0;
    font-size: 30px;
    margin-bottom: 20px;
}

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

textarea {
    min-height: 100px; 
    max-height: 250px;
    max-width: 100%;
    min-width: 100%;
}

#boton {
    background: #3aade7;
    color: white;
    border-radius: 7px;
    padding: 15px;
}

#boton:hover {
    cursor: pointer;
    background: #1c4357;
}

@media (max-width: 480px) {
    form {
        width: 100%;
    }    
}
.atras {
    background: #3aade7;
    color: white;
    display: inline-block;
    font-size: 1.25em;
    margin: 40px;
    padding: 10px 0px;
    text-align: center;
    width: 150px;
    text-decoration: none;
    border-radius: 7px;
    font-family: monospace;
    
}

.atras:hover {
    background: #1c4357;
    cursor: pointer
}