Basic reset CSS

reset.css

/* RESET  - resetea los estilos por defecto del navegador */

html, body, div, span, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, img, small, 
strong, center, ul, li, form, label, article, aside, figure, figcaption, 
footer, header, menu, nav, section, audio, video, main {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    border: 0;
}

html {
    font-size: 16px;
    font-family: Arial, Helvetica, sans-serif;
}


h1 { font-size: 2em; }
h2 { font-size: 1.5em; }
h3 { font-size: 1.3em; }
h4 { font-size: 1em; }
h5 { font-size: 0.8em; }
h6 { font-size: 0.7em; }


.button, a, a:focus {
    outline: none;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
}