* {
  box-sizing: border-box;
}

body {
  height: 100vh;
  height: 100svh;
  margin: 0;

  color: #f5f5f5;
  background: #111827;
  font-family: system-ui, sans-serif;
}

main {
  width: min(90%, 700px);
  padding: 3rem;
  border: 1px solid #374151;
  border-radius: 1rem;
  background: #1f2937;
}

h1 {
  margin-top: 0;
}