:root {
  --primary: #87CEEB;
  --bg: #1a1d21;
  --card: #23272d;
  --text: #ffffff;
  --muted: #9ca3af;
  --border: rgba(255, 255, 255, 0.1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); }

.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(26, 29, 33, 0.85);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 820px; margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.2rem; text-decoration: none; color: var(--text); }
.brand-mark {
  width: 32px; height: 32px; border-radius: 9px;
  display: block; object-fit: cover;
}
.back { font-size: 0.9rem; color: var(--muted); text-decoration: none; }
.back:hover { color: var(--text); }

main { max-width: 820px; margin: 0 auto; padding: 48px 24px 80px; }

.doc h1 { font-size: 2rem; font-weight: 800; margin-bottom: 10px; }
.meta { color: var(--muted); font-size: 0.9rem; }
.doc h2 {
  font-size: 1.25rem; font-weight: 700; margin: 36px 0 12px;
  padding-top: 26px; border-top: 1px solid var(--border);
}
.doc h3 { font-size: 1.05rem; font-weight: 600; margin: 22px 0 8px; color: var(--primary); }
.doc p { margin: 12px 0; color: #e5e7eb; }
.doc ul { margin: 12px 0 12px 22px; }
.doc li { margin: 6px 0; color: #e5e7eb; }
.doc strong { color: #ffffff; }
.doc .lead { color: var(--muted); }

footer { border-top: 1px solid var(--border); padding: 28px 24px; text-align: center; color: var(--muted); font-size: 0.85rem; }
footer a { color: var(--muted); margin: 0 8px; text-decoration: none; }
footer a:hover { color: var(--text); }