:root {
/* Original dark gray - keep for transparent logo later */
/*  --bg: #0f1115; */

/* Match logo background (pure black) */
  --bg: #000000;

  --fg: #e9edf2;
  --muted: #b7c0cc;
  --accent: #2f6bd8;
}

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont,
        "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 18px 20px 48px;
}

.doc h1 {
  font-size: 2.1rem;
  margin-bottom: 1rem;
}

.doc p {
  margin: 0.75rem 0;
}

.doc a {
  color: var(--accent);
  text-decoration: none;
}

.doc a:hover {
  text-decoration: underline;
}

.hero {
  text-align: center;
  margin: 0.25rem 0 2rem;
}

.site-title {
  font-size: 3rem;
  margin-bottom: 0.5rem;
}

.site-tagline {
  font-size: 1.2rem;
  opacity: 0.85;
  margin-top: 0.35rem;
}

.content-index {
  max-width: 700px;
  margin: 0 auto 4rem;
}

.content-index h2 {
  margin-top: 3rem;
  border-bottom: 1px solid #444;
  padding-bottom: 0.5rem;
}

.content-index ul {
  list-style: none;
  padding-left: 0;
}

.content-index li {
  margin: 0.6rem 0;
}

.site-header {
  text-align: center;
  padding: 12px 0 0;   /* was 18px 0 6px */
  line-height: 0;      /* eliminates baseline whitespace */
}

.site-logo {
  display: block;      /* removes inline-image baseline gap */
  margin: 0 auto;
  max-width: 420px;
  width: 80%;
  height: auto;
}