:root {
  --ink: #1a1a1a; --muted: #5a5a5a; --line: #e2e2e2;
  --bg: #ffffff; --accent: #1f5f4f; --promo-bg: #f6f6f4;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #ececec; --muted: #a0a0a0; --line: #303030;
          --bg: #141414; --accent: #6fbfa8; --promo-bg: #1e1e1e; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
       font: 17px/1.65 ui-serif, Georgia, serif; }
main, .site-header, .site-footer { max-width: 44rem; margin: 0 auto; padding: 0 1rem; }
.site-header { display: flex; justify-content: space-between; align-items: baseline;
               gap: 1rem; padding-top: 1.5rem; flex-wrap: wrap; }
.wordmark { font-weight: 700; text-decoration: none; color: var(--ink); }
nav a { margin-left: 1rem; color: var(--muted); text-decoration: none; font-size: .9rem; }
a { color: var(--accent); }
.promo { border: 1px solid var(--line); background: var(--promo-bg);
         border-radius: 8px; padding: 1rem; margin: 2rem 0; }
.promo-label { display: block; font-size: .7rem; letter-spacing: .08em;
               text-transform: uppercase; color: var(--muted); margin-bottom: .5rem; }
.promo-link { display: block; text-decoration: none; }
.promo-link span { display: block; color: var(--muted); font-size: .9rem; }
.limitations { border-left: 3px solid var(--line); padding-left: 1rem; color: var(--muted); }
.site-footer { border-top: 1px solid var(--line); margin-top: 3rem;
               padding-top: 1.5rem; padding-bottom: 3rem; }
.disclosure { font-size: .85rem; }
.small { font-size: .8rem; color: var(--muted); }
table { border-collapse: collapse; width: 100%; }
th, td { border-bottom: 1px solid var(--line); text-align: left; padding: .5rem 0; }