:root {
  --bg-1: #0a1929;
  --bg-2: #12263a;
  --accent: #2ec5d6;
  --text: #e6eef5;
  --muted: #93a7b8;
  --border: rgba(147, 167, 184, 0.18);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, var(--bg-2), var(--bg-1)) fixed;
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
}
.topbar { max-width: 820px; margin: 0 auto; padding: 24px 24px 8px; }
.topbar img { width: 150px; max-width: 50vw; height: auto; }
.doc { max-width: 820px; margin: 0 auto 48px; padding: 0 24px; }
.doc h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); font-weight: 600; margin-bottom: 6px; }
.doc .sub { color: var(--muted); margin-bottom: 24px; }
.doc h2 { color: var(--accent); font-size: 1.15rem; margin: 28px 0 8px; padding-bottom: 4px; border-bottom: 1px solid var(--border); }
.doc h3 { font-size: 1rem; margin: 18px 0 6px; }
.doc h4 { font-size: 0.95rem; margin: 12px 0 4px; color: var(--muted); }
.doc p, .doc li { margin-bottom: 10px; }
.doc ul, .doc ol { padding-left: 22px; margin-bottom: 10px; }
.doc li { margin-bottom: 4px; }
.doc a { color: var(--accent); }
.doc address { font-style: normal; margin-bottom: 10px; }
.doc table { width: 100%; border-collapse: collapse; margin-bottom: 14px; font-size: 0.9rem; }
.doc th, .doc td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
.doc th { background: rgba(255, 255, 255, 0.04); }
.doc .note { background: rgba(46, 197, 214, 0.08); border-left: 3px solid var(--accent); padding: 10px 14px; margin: 14px 0; color: var(--muted); font-size: 0.9rem; }
.backlinks { max-width: 820px; margin: 0 auto; padding: 20px 24px 48px; border-top: 1px solid var(--border); color: var(--muted); font-size: 0.85rem; }
.backlinks a { color: var(--muted); margin-right: 18px; text-decoration: none; }
.backlinks a:hover { color: var(--accent); }