:root {
  --bg: #0f172a;
  --surface: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --border: #334155;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container {
  max-width: 820px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.hero {
  padding: 4rem 0 2.5rem;
  background: radial-gradient(1200px 400px at 50% -10%, #1e3a8a 0%, transparent 60%), var(--surface);
  border-bottom: 1px solid var(--border);
}

.hero h1 {
  margin: 0 0 0.5rem;
  font-size: 2.5rem;
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--muted);
  font-size: 1.125rem;
  margin: 0 0 1.5rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.nav a {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: background 0.15s ease;
}

.nav a:hover {
  background: rgba(56, 189, 248, 0.12);
}

.section {
  padding: 2.25rem 0;
  border-bottom: 1px solid var(--border);
}

.section h2 {
  margin-top: 0;
  font-size: 1.6rem;
  color: var(--text);
}

.section p {
  color: var(--muted);
}

.section ul {
  color: var(--muted);
  padding-left: 1.25rem;
}

.section ul li {
  margin-bottom: 0.4rem;
}

.section ul strong {
  color: var(--text);
}

.footer {
  padding: 1.5rem 0 2.5rem;
  color: var(--muted);
  font-size: 0.875rem;
  text-align: center;
}