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

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

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

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--bg-alt);
}

.nav {
  max-width: 1000px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { font-weight: 700; font-size: 1.25rem; color: var(--text); }
.brand span { color: var(--accent); margin-left: 0.25rem; }

.nav-links { list-style: none; display: flex; gap: 1.5rem; }

.hero {
  max-width: 800px;
  margin: 0 auto;
  padding: 6rem 1.5rem 4rem;
  text-align: center;
}

.hero h1 { font-size: 2.5rem; margin-bottom: 1rem; }
.hero p { color: var(--muted); font-size: 1.15rem; margin-bottom: 2rem; }

.cta {
  display: inline-block;
  background: var(--accent);
  color: #0f172a;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
}
.cta:hover { text-decoration: none; opacity: 0.9; }

.section {
  max-width: 1000px;
  margin: 0 auto;
  padding: 4rem 1.5rem;
}
.section.alt { background: var(--bg-alt); max-width: none; }
.section.alt > * { max-width: 1000px; margin-left: auto; margin-right: auto; }

.section h2 { font-size: 1.75rem; margin-bottom: 1.5rem; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }

.card {
  background: var(--bg-alt);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid #334155;
}
.card h3 { margin-bottom: 0.5rem; }
.card p { color: var(--muted); }

.site-footer {
  border-top: 1px solid var(--bg-alt);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--muted);
}

@media (max-width: 600px) {
  .hero h1 { font-size: 2rem; }
  .nav-links { gap: 1rem; }
}