:root {
  --bg: #f2f2f7;
  --card: #ffffff;
  --text: #1c1c1e;
  --muted: #6e6e73;
  --accent: #0a84ff;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --card: #1c1c1e;
    --text: #f2f2f7;
    --muted: #98989f;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.card {
  width: 100%;
  max-width: 420px;
  padding: 28px 24px;
  border-radius: 20px;
  background: var(--card);
  text-align: center;
}

h1 { margin: 0 0 8px; font-size: 28px; }
p { margin: 8px 0; color: var(--muted); }

.code {
  margin: 16px 0;
  padding: 12px;
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);
  font: 600 24px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: 2px;
  user-select: all;
}

ol { text-align: left; color: var(--muted); padding-left: 20px; }