/* ============ Atom public site — plain document style (black on white) ============ */
:root { --accent: #0a58ca; --muted: #555; --line: #ddd; --panel: #f6f6f6; }

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: #ffffff;
  color: #111111;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}
a { color: var(--accent); }
b, strong { color: #000; }

.site-head {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  max-width: 820px; margin: 0 auto; padding: 16px 20px; border-bottom: 1px solid var(--line);
}
.brand { font-size: 20px; font-weight: 700; color: #111; text-decoration: none; }
.site-head nav { display: flex; flex-wrap: wrap; gap: 14px; font-size: 14px; }

main { max-width: 820px; margin: 0 auto; padding: 26px 20px 56px; }

/* Landing */
.hero { text-align: center; padding: 30px 0 20px; }
.hero h1 { font-size: 30px; font-weight: 700; margin: 0 0 12px; }
.hero p { color: var(--muted); font-size: 16px; max-width: 560px; margin: 0 auto 20px; }
.hero .cta { display: inline-block; background: var(--accent); color: #fff; font-weight: 600;
  padding: 12px 24px; border-radius: 8px; text-decoration: none; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin: 26px 0; }
.card { border: 1px solid var(--line); border-radius: 8px; padding: 16px; }
.card h3 { margin: 0 0 6px; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* Documents */
.doc h1 { font-size: 26px; font-weight: 700; margin: 4px 0 4px; }
.doc .updated { color: var(--muted); font-size: 13px; margin-bottom: 22px; }
.doc h2 { font-size: 19px; font-weight: 700; margin: 26px 0 8px; }
.doc p, .doc li { color: #222; }
.doc ul, .doc ol { padding-left: 22px; }
.doc li { margin: 5px 0; }
.doc .note { background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 12px 14px; margin: 16px 0; color: #333; font-size: 14.5px; }
.ph { color: inherit; }

/* Tables */
table { width: 100%; border-collapse: collapse; margin: 14px 0; }
th, td { text-align: left; padding: 9px 12px; border: 1px solid #ccc; font-size: 15px; }
th { background: var(--panel); font-weight: 600; }

/* Footer */
.site-foot { border-top: 1px solid var(--line); max-width: 820px; margin: 34px auto 0; padding: 22px 20px 40px; color: var(--muted); font-size: 13.5px; }
.site-foot nav { display: flex; flex-wrap: wrap; gap: 14px; margin: 6px 0 12px; }
.site-foot .req { line-height: 1.7; }