html, body { margin: 0; height: 100%; }
body {
  display: flex; align-items: center; justify-content: center;
  background: #ffffff; color: #1f2933;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  text-align: center; padding: 24px; box-sizing: border-box;
}
main { max-width: 32rem; }
img { max-width: 100%; height: auto; }
h1 { font-size: 1.6rem; margin: 1.5rem 0 0.75rem; }
p { line-height: 1.5; margin: 0.5rem 0; }
a { color: #1f4e79; }