:root {
  --bg: #05070c;
  --surface: #0c1018;
  --text: #f2f5fa;
  --muted: #9aa6b8;
  --accent: #007ffd;
  --line: rgba(255, 255, 255, 0.08);
  --max: 44rem;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(0, 127, 253, 0.18), transparent 55%),
    var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  line-height: 1.6;
}

a { color: var(--accent); text-underline-offset: 0.15em; }
a:hover { color: #4da3ff; }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  background: rgba(5, 7, 12, 0.85);
  z-index: 2;
}

.brand {
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.1rem;
  font-size: 0.92rem;
}

.hero, .doc {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
  padding: 2.5rem 0 3.5rem;
}

.eyebrow {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  margin: 0 0 0.75rem;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  line-height: 1.15;
  margin: 0 0 0.85rem;
  font-weight: 750;
}

.lede {
  color: var(--muted);
  font-size: 1.05rem;
  margin: 0 0 1.75rem;
  max-width: 36rem;
}

.card-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.75rem;
}

.card-list a {
  display: block;
  padding: 1rem 1.1rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
}

.card-list a:hover {
  border-color: rgba(0, 127, 253, 0.45);
}

.doc h2 {
  margin: 2rem 0 0.65rem;
  font-size: 1.15rem;
}

.doc p, .doc li {
  color: #d5dce8;
}

.doc ul {
  padding-left: 1.2rem;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.25rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}

code {
  font-size: 0.85em;
  background: rgba(255, 255, 255, 0.06);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.cta {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.7rem 1rem;
  background: var(--accent);
  color: #fff !important;
  text-decoration: none;
  border-radius: 10px;
  font-weight: 650;
}