* {
  padding: 0;
  margin : 0;
  box-sizing: border-box;
}

body {
  margin: 2rem;
  text-align: center;
}

h1 {
  margin: 1rem;
}

footer h2 {
  font-size: small;
}

main {
  display: flex;
  flex-direction: column;
}

main img[data-src] {
  filter: blur(0.4em)
}

main img {
  margin: 1rem auto;
  filter: blur(0em);
  transition: filter 1s;
}