:root {
  --accent: #4f6675; --accent-dark: #3d505c; --bg: #eef1f3; --card: #fff;
  --fg: #1c1c1e; --muted: #6e6e73; --line: #e5e5ea; --on-accent: #fff;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --accent: #8ca2ad; --accent-dark: #a9bcc5; --bg: #121416; --card: #1c1f22;
    --fg: #ececee; --muted: #a1a1a6; --line: #2c3034; --on-accent: #121416; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
a { color: var(--accent); }
.top { background: var(--card); border-bottom: 1px solid var(--line); padding: 0.6rem 16px; }
.brand { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1.1rem; color: var(--fg); text-decoration: none; }
main { max-width: 44rem; margin: 0 auto; padding: 1.5rem 16px 2rem; }
.hero { text-align: center; padding: 2.5rem 0 1rem; }
.hero-logo { width: 96px; height: 96px; }
.hero h1 { font-size: 2.2rem; margin: 0.75rem 0 0.5rem; }
.lede { font-size: 1.15rem; color: var(--muted); margin: 0 auto 1.75rem; max-width: 30rem; }
.play { display: inline-block; background: var(--accent); color: var(--on-accent); text-decoration: none;
  font-weight: 600; font-size: 1.1rem; padding: 0.85rem 1.6rem; border-radius: 12px; }
.play:hover, .play:focus-visible { background: var(--accent-dark); }
.page { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 1.25rem 1.25rem 0.75rem; overflow-wrap: anywhere; }
.page h1 { margin-top: 0; font-size: 1.7rem; }
.page h2 { font-size: 1.2rem; margin-top: 1.75rem; }
.effective { color: var(--muted); margin-top: -0.5rem; }
.page table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
.page th, .page td { text-align: left; border-bottom: 1px solid var(--line); padding: 0.4rem 0.5rem 0.4rem 0; vertical-align: top; }
.foot { text-align: center; color: var(--muted); font-size: 0.9rem; padding: 1.5rem 16px 2rem; }
.foot nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.4rem 1.25rem; }
.foot p { margin: 0.75rem 0 0; }