html, body {
    background: floralwhite;
    background-image: url('../imgs/fondo-colores-nombres-html-css.jpg');
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
    height: 100%;
}

.mw-200{
    min-width: 200px;
}