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

html,
body {
  height: 100%;
  background: radial-gradient(circle at top, #1e40af, #020617);
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 0.5rem;
  background-attachment: fixed;
}