html {
    /* background: Slateblue;*/
    background: Slateblue;
    box-sizing: border-box;
}

* {
    box-sizing: inherit;
}

.page-background-class {
    background-image: url('../images/fondocontacto.jpg');
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    margin: 0;
    padding: 0;
    height: 100%;
}

body {
    background: white;
    width: 90%;
    max-width: 800px;
    margin: 50px auto;
    font-family: Calibri, Arial, sans-serif;
    padding: 20px;
}

h1, p {
    text-align: center;
}

label {
    display: block;
    margin: 1em 0 .2em;
}
/* single-line text, checkbox, and button */
    input, select, textarea {
    display: block;
    width: 100%;
    padding: .3em;
    font-size: 20px;
    background-color: #fbfbfb;
    border: solid 1px #CCC;
    resize: vertical;
}

textarea {
    min-height: 180px;
}

select {
    color: indigo;
}

option {
    color: blue;
    background: #ADFF2F;
}

input[type=checkbox] {
    display: inline;
    width: auto;
    color: red;
}

input[type=submit] {
    background: lightcoral;
    margin: 1em 0 0;
    color: white;
    border: none;
    border-radius: 8px;
    transition: all .3s ease-out;
}

input:focus,
input:hover,
select:focus,
select:hover,
textarea:focus,
textarea:hover {
    /* background: lavenderBlush;
    */
    background: #FFFAF0;
}

/* hover and focus states */
input[type=submit]:hover,
input[type=submit]:focus {
    background: lightgreen;
    outline: none;
}

@media screen and (min-width:600px) {
    /*  make the form 2 columns */
    form:after {
        content: '';
        display: block;
        clear: both;
    }

    .column {
        width: 50%;
        padding: 1em;
        float: left;
    }
}