* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

main {
  display: flex;
  flex-direction: column;
  width: 100%;
  margin: 0 auto;
}

main a {
  display: block;
  width: 100%;
}

main img {
  width: 100%;
  display: block;
}