html,
body,
header,
main,
menu,
nav,
footer,
section,
article,
pre,
div,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ol,
ul,
li,
a {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    border-style: none;
    font-style: normal;
    list-style: none;
    text-decoration: none;
}