ul,
li {
  list-style: none;
  margin: 0;
  padding: 0;
}
h1,
h2,
h3 {
  margin: 0;
  padding: 0;
}
html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}
body {
  background: url("/img/bg.jpg") no-repeat center/cover;
}