:root {
  --bg: #0a0b10;
  --surface: #12141c;
  --border: #1e2230;
  --text: #eef0f4;
  --muted: #8b93a7;
  --primary: #6366f1;
  --primary2: #8b5cf6;
  --radius: 14px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

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

.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,11,16,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

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

.logo { font-weight: 800; font-size: 18px; color: var(--text); text-decoration: none; }

.nav-links { display: flex; align-items: center; gap: 20px; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav-links a:hover { color: var(--text); }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border-radius: 10px; font-weight: 600; font-size: 14px;
  text-decoration: none; border: none; cursor: pointer; transition: 0.15s;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  color: white;
}

.btn-outline {
  background: transparent; color: var(--text);
  border: 1px solid var(--border);
}

.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-block { width: 100%; margin-top: 12px; }

.btn:hover { filter: brightness(1.08); }

.hero { padding: 80px 0 60px; }

.hero-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
}

@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; }
  .nav-links a:not(.btn) { display: none; }
}

.pill {
  display: inline-block; background: var(--surface); border: 1px solid var(--border);
  padding: 6px 12px; border-radius: 999px; font-size: 12px; color: var(--muted); margin-bottom: 16px;
}

h1 { font-size: clamp(32px, 5vw, 48px); line-height: 1.15; margin-bottom: 16px; }
.gradient { background: linear-gradient(135deg, #a5b4fc, #c084fc); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.lead { font-size: 18px; color: var(--muted); margin-bottom: 24px; max-width: 520px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.micro { font-size: 12px; color: var(--muted); }

.demo-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}

.demo-label { font-size: 12px; color: var(--muted); margin-bottom: 12px; }
.demo-normal { color: var(--muted); margin-bottom: 16px; font-size: 15px; }
.demo-bionic { font-size: 15px; line-height: 1.8; }
.demo-bionic .b { font-weight: 800; color: #fff; }

.section { padding: 72px 0; }
.section.alt { background: var(--surface); }
.section h2 { font-size: 28px; margin-bottom: 32px; text-align: center; }

.grid-3 {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px;
}

.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}

.card .icon { font-size: 28px; margin-bottom: 12px; }
.card h3 { margin-bottom: 8px; font-size: 16px; }
.card p { color: var(--muted); font-size: 14px; }

.steps { max-width: 560px; margin: 0 auto; font-size: 16px; }
.steps li { margin-bottom: 12px; color: var(--muted); }
.steps strong { color: var(--text); }

details {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 16px 20px; margin-bottom: 10px;
}

details summary { cursor: pointer; font-weight: 600; }
details p { margin-top: 10px; color: var(--muted); font-size: 14px; }

.footer { border-top: 1px solid var(--border); padding: 32px 0; margin-top: 40px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.footer a { color: var(--muted); text-decoration: none; margin-left: 16px; font-size: 13px; }

/* Pricing */
.pricing-hero { padding-top: 48px; }
.pricing-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
@media (max-width: 768px) { .pricing-grid { grid-template-columns: 1fr; } }

.price-card, .compare-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px;
}

.price { font-size: 48px; font-weight: 800; margin: 16px 0 24px; }
.price span { font-size: 16px; font-weight: 400; color: var(--muted); }

.price-features { list-style: none; margin-bottom: 24px; }
.price-features li { padding: 8px 0; color: var(--muted); font-size: 14px; }

.checkout-form label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.checkout-form input {
  width: 100%; padding: 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
}

.compare-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.compare-table th, .compare-table td { padding: 10px; border-bottom: 1px solid var(--border); text-align: left; }
.compare-table th { color: var(--muted); }

.success-box {
  text-align: center; background: var(--surface); border: 1px solid #34d399;
  border-radius: var(--radius); padding: 40px; max-width: 560px; margin: 0 auto;
}

.success-box code {
  display: block; font-size: 20px; font-weight: 700; color: #34d399;
  margin: 16px 0; padding: 16px; background: var(--bg); border-radius: 8px;
}

.error { color: #f87171; font-size: 13px; margin-top: 10px; }
.hidden { display: none !important; }