:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: linear-gradient(135deg, #f6821f 0%, #faae40 100%);
  color: #1a1a1a;
}
main {
  max-width: 40rem;
  padding: 2.5rem;
  margin: 1rem;
  background: rgba(255, 255, 255, 0.92);
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
}
h1 { margin-top: 0; font-size: 1.6rem; }
p { line-height: 1.6; }
code { background: #f0f0f0; padding: 0.1em 0.4em; border-radius: 4px; }