*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0a0a1a;
  --surface: #12122a;
  --surface-raised: #1a1a3a;
  --text: #f0f0ff;
  --text-muted: #8888bb;
  --accent: #4f46e5;
  --accent-glow: #818cf8;
  --border: #2a2a4a;
  --radius: 10px;
  --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
}
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; }

header { background: var(--bg); border-bottom: 1px solid var(--border); }
nav { max-width: 1100px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; padding: 1rem 1.5rem; }
.logo { font-size: 1.25rem; font-weight: 700; color: var(--text); text-decoration: none; }
.nav-links { display: flex; gap: 1.5rem; }
.nav-links a { color: var(--text-muted); text-decoration: none; font-size: 0.9rem; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }

.hero { max-width: 1100px; margin: 0 auto; text-align: center; padding: 5rem 1.5rem; }
.hero h1 { font-size: 3rem; font-weight: 800; line-height: 1.15; letter-spacing: -0.02em; }
.hero-sub { color: var(--text-muted); font-size: 1.15rem; max-width: 560px; margin: 1.25rem auto 2rem; }
.cta-primary { display: inline-block; background: var(--accent); color: #fff; padding: 0.85rem 2rem; border-radius: var(--radius); font-weight: 600; font-size: 1rem; text-decoration: none; transition: box-shadow 0.2s, transform 0.2s; }
.cta-primary:hover { box-shadow: 0 0 24px var(--accent-glow); transform: translateY(-1px); }

section { max-width: 1100px; margin: 0 auto; padding: 4rem 1.5rem; }
section h2 { font-size: 1.75rem; font-weight: 700; margin-bottom: 2rem; text-align: center; }

.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.25rem; }
.product-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; display: flex; flex-direction: column; transition: border-color 0.2s; }
.product-card:hover { border-color: var(--accent); }
.product-card .category-tag { display: inline-block; font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent-glow); margin-bottom: 0.5rem; }
.product-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.5rem; }
.product-card .desc { color: var(--text-muted); font-size: 0.88rem; flex: 1; margin-bottom: 0.75rem; }
.product-card .meta { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 1rem; }
.product-card .price-row { display: flex; align-items: baseline; justify-content: space-between; }
.product-card .price { font-size: 1.4rem; font-weight: 800; color: var(--accent-glow); }
.product-card .buy-btn { background: transparent; border: 1px solid var(--accent); color: var(--accent-glow); padding: 0.45rem 1rem; border-radius: 6px; font-size: 0.85rem; font-weight: 600; cursor: pointer; transition: background 0.2s, color 0.2s; }
.product-card .buy-btn:hover { background: var(--accent); color: #fff; }

.how-it-works { background: var(--surface); max-width: 100%; padding: 4rem 1.5rem; }
.steps { display: flex; gap: 2rem; max-width: 900px; margin: 0 auto; justify-content: center; flex-wrap: wrap; }
.step { text-align: center; max-width: 250px; }
.step-num { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 50%; background: var(--accent); color: #fff; font-weight: 800; font-size: 1.1rem; margin-bottom: 0.75rem; }
.step h3 { font-size: 1rem; margin-bottom: 0.35rem; }
.step p { color: var(--text-muted); font-size: 0.88rem; }
.guarantee { text-align: center; margin-top: 2.5rem; font-size: 0.95rem; color: var(--accent-glow); }

.testimonial-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.25rem; }
.testimonial-grid blockquote { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; }
.testimonial-grid p { font-style: italic; margin-bottom: 0.5rem; font-size: 0.95rem; }
.testimonial-grid cite { font-size: 0.82rem; color: var(--text-muted); font-style: normal; }

.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1rem 1.25rem; margin-bottom: 0.5rem; cursor: pointer; }
.faq summary { font-weight: 600; font-size: 0.95rem; list-style: none; }
.faq details p { margin-top: 0.5rem; color: var(--text-muted); font-size: 0.9rem; }

footer { border-top: 1px solid var(--border); max-width: 1100px; margin: 0 auto; padding: 2rem 1.5rem; display: flex; justify-content: space-between; align-items: center; font-size: 0.82rem; color: var(--text-muted); }
.footer-links { display: flex; gap: 1.25rem; }
.footer-links a { color: var(--text-muted); text-decoration: none; }
.footer-links a:hover { color: var(--text); }

@media (max-width: 640px) {
  .hero h1 { font-size: 2rem; }
  .steps { flex-direction: column; align-items: center; }
  footer { flex-direction: column; gap: 0.5rem; text-align: center; }
}