:root {
  --bg: #0b0f14;
  --bg-alt: #10161d;
  --text: #e8edf2;
  --muted: #9aa7b2;
  --accent: #3ddc97;
  --accent-2: #4f8cff;
  --card: #131a22;
  --border: #1f2933;
}

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

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

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

a { color: inherit; text-decoration: none; }

.nav {
  position: sticky;
  top: 0;
  background: rgba(11, 15, 20, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
}

.brand .dot { color: var(--accent); }

.nav nav a {
  margin-left: 24px;
  color: var(--muted);
  transition: color 0.2s;
}

.nav nav a:hover { color: var(--text); }

.hero {
  padding: 120px 0 80px;
  background: radial-gradient(ellipse at top, rgba(79,140,255,0.15), transparent 60%);
}

.hero-inner { text-align: center; max-width: 760px; margin: 0 auto; }

.hero h1 {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 24px;
}

.accent { color: var(--accent); }

.lead {
  color: var(--muted);
  font-size: 1.15rem;
  margin-bottom: 40px;
}

.cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 8px;
  font-weight: 600;
  transition: transform 0.15s, opacity 0.15s;
}

.btn:hover { transform: translateY(-2px); opacity: 0.92; }

.btn-primary { background: var(--accent); color: #06110c; }
.btn-secondary { background: var(--card); color: var(--text); border: 1px solid var(--border); }

.features, .about, .contact {
  padding: 80px 0;
  border-top: 1px solid var(--border);
}

.features h2, .about h2, .contact h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 40px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}

.card h3 { margin-bottom: 12px; font-size: 1.1rem; }
.card p { color: var(--muted); }

.about, .contact { text-align: center; }
.about .container, .contact .container { max-width: 700px; }
.about p, .contact p { color: var(--muted); }

.contact a { color: var(--accent-2); font-weight: 600; }

.footer {
  padding: 32px 0;
  text-align: center;
  color: var(--muted);
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}

@media (max-width: 640px) {
  .hero h1 { font-size: 2.1rem; }
  .nav nav a { margin-left: 14px; font-size: 0.9rem; }
}