:root {
  background: #1764d8;
}

* {
  box-sizing: border-box;
}

html,
body,
main {
  width: 100%;
  min-height: 100%;
  margin: 0;
}

body {
  min-height: 100svh;
  background: #1764d8;
}

main {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 2rem;
}

img {
  display: block;
  width: min(58vw, 640px);
  height: auto;
}

@media (max-width: 600px) {
  img {
    width: min(78vw, 420px);
  }
}