:root {
  --bg: #0f172a;
  --panel: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
}
@media (prefers-color-scheme: light) {
  :root { --bg: #f8fafc; --panel: #ffffff; --text: #0f172a; --muted: #475569; --accent: #0369a1; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
.hero {
  text-align: center;
  padding: 6rem 1.5rem 5rem;
  background: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
  color: #fff;
}
.hero h1 { font-size: clamp(2.2rem, 7vw, 4rem); margin: 0 0 .5rem; letter-spacing: -.02em; }
.hero p { font-size: 1.25rem; margin: 0 0 2rem; opacity: .92; }
.button {
  display: inline-block;
  padding: .75rem 1.75rem;
  border-radius: 999px;
  background: #fff;
  color: #1e1b4b;
  font-weight: 600;
  text-decoration: none;
}
.button:hover { transform: translateY(-1px); }
main { max-width: 52rem; margin: 0 auto; padding: 2rem 1.5rem; }
section { margin: 3rem 0; }
h2 { font-size: 1.6rem; margin-bottom: .5rem; }
.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); }
.card {
  display: block;
  padding: 1.25rem;
  background: var(--panel);
  border: 1px solid rgba(148, 163, 184, .25);
  border-radius: 12px;
  color: inherit;
  text-decoration: none;
}
.card:hover { border-color: var(--accent); }
.card h3 { margin: 0 0 .25rem; color: var(--accent); }
.card p { margin: 0; color: var(--muted); }
footer { text-align: center; padding: 2rem 1rem 3rem; color: var(--muted); font-size: .9rem; }