body {
  margin: 0;
  padding: 0;
}

html,
body,
div,
span,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
a,
em,
img,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
article,
footer,
header,
nav,
section,
main {
  margin: 0;
  padding: 0;
}

img {
  display: block;
  max-width: 100%;
}

* {
  box-sizing: border-box;
}

ul,
li {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  text-decoration: none;
}