html,
body,
head,
main,
footer,
section,
div,
h1,
h2,
h3,
h4,
h5,
h6,
p,
a,
ul,
ol,
li,
span,
img,
input,
textarea,
select {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

a {
  text-decoration: none;
}

ul, ol {
  list-style: none;
}