:root { color-scheme: dark; }
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: #0f1115;
  color: #e6e9ef;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.card {
  background: #161a21;
  border: 1px solid #232936;
  border-radius: 12px;
  padding: 24px;
  max-width: 480px;
  width: 100%;
}
h1 { font-size: 20px; margin: 12px 0 16px; }
ol { padding-left: 20px; line-height: 1.6; }
.note { color: #9aa4b2; font-size: 14px; line-height: 1.5; }
@media (prefers-reduced-motion: reduce) { * { animation: none; transition: none; } }