/* ====== Reset & Base ====== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #0a0a0a;
  --bg-alt: #111111;
  --bg-card: #161616;
  --bg-card-hover: #1a1a1a;
  --border: #222222;
  --text: #f5f5f5;
  --text-secondary: #999999;
  --accent: #6366f1;
  --accent-2: #8b5cf6;
  --gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a78bfa 100%);
  --radius: 12px;
  --radius-sm: 8px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 760px; }

/* ====== Buttons ====== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; border-radius: var(--radius-sm);
  font-weight: 600; font-size: 0.95rem;
  background: var(--gradient); color: #fff;
  border: none; cursor: pointer;
  transition: opacity 0.2s, transform 0.2s;
}
.btn:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn-ghost {
  background: transparent; border: 1px solid var(--border);
  color: var(--text-secondary);
}
.btn-ghost:hover { border-color: var(--text-secondary); color: var(--text); }
.btn-full { width: 100%; }
.btn-primary { background: var(--gradient); }

/* ====== Nav ====== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 16px 0;
  background: rgba(10,10,10,0.8); backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}
.nav.scrolled { border-bottom-color: var(--border); }
.nav-inner {
  max-width: 1140px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { font-size: 1.25rem; font-weight: 800; letter-spacing: -0.02em; }
.logo span { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.nav-links { display: flex; gap: 32px; }
.nav-links a { font-size: 0.9rem; color: var(--text-secondary); transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }
.mobile-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; }
.mobile-toggle span { display: block; width: 22px; height: 2px; background: var(--text); transition: 0.2s; }

@media (max-width: 768px) {
  .nav-links, .nav .btn { display: none; }
  .mobile-toggle { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column; gap: 16px;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg); padding: 24px;
    border-bottom: 1px solid var(--border);
  }
}

/* ====== Animations ====== */
.animate-in {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-in.visible { opacity: 1; transform: translateY(0); }
.animate-in:nth-child(2) { transition-delay: 0.08s; }
.animate-in:nth-child(3) { transition-delay: 0.16s; }
.animate-in:nth-child(4) { transition-delay: 0.24s; }

/* ====== Hero ====== */
.hero {
  position: relative;
  padding: 180px 0 120px; text-align: center;
  overflow: hidden;
}
.hero-badge {
  display: inline-block; padding: 6px 16px;
  border: 1px solid var(--border); border-radius: 100px;
  font-size: 0.8rem; font-weight: 500; color: var(--text-secondary);
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800; line-height: 1.1;
  letter-spacing: -0.03em; margin-bottom: 24px;
}
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  max-width: 600px; margin: 0 auto 40px;
  font-size: 1.15rem; color: var(--text-secondary); line-height: 1.7;
}
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 56px; }
.hero-proof { display: flex; align-items: center; justify-content: center; gap: 24px; flex-wrap: wrap; }
.hero-stat { font-size: 0.9rem; color: var(--text-secondary); }
.hero-stat strong { color: var(--text); }
.hero-stat-divider { width: 1px; height: 20px; background: var(--border); }
.hero-glow {
  position: absolute; top: -200px; left: 50%; transform: translateX(-50%);
  width: 800px; height: 600px;
  background: radial-gradient(ellipse, rgba(99,102,241,0.12) 0%, transparent 70%);
  pointer-events: none;
}

/* ====== Sections ====== */
.section { padding: 120px 0; }
.section-alt { background: var(--bg-alt); }
.section-label {
  display: inline-block; font-size: 0.8rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em;
  color: var(--accent); margin-bottom: 16px;
}
.section h2 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 800; letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.section-sub {
  font-size: 1.1rem; color: var(--text-secondary);
  max-width: 560px; margin-bottom: 56px;
}
.section:not(.section-cta) .section-label,
.section:not(.section-cta) h2,
.section:not(.section-cta) .section-sub { text-align: left; }

@media (max-width: 768px) {
  .section { padding: 80px 0; }
}

/* ====== Steps ====== */
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.step-card {
  padding: 36px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg-card);
  transition: border-color 0.3s, transform 0.3s;
}
.step-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.step-num {
  font-size: 0.8rem; font-weight: 700; color: var(--accent);
  margin-bottom: 16px; font-variant-numeric: tabular-nums;
}
.step-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 12px; }
.step-card p { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.6; }

@media (max-width: 768px) {
  .steps-grid { grid-template-columns: 1fr; }
}

/* ====== Features ====== */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  padding: 32px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg-card);
  transition: border-color 0.3s, transform 0.3s;
}
.feature-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.feature-icon { font-size: 1.5rem; margin-bottom: 16px; }
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }

@media (max-width: 768px) {
  .features-grid { grid-template-columns: 1fr; }
}

/* ====== Pricing ====== */
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: start; }
.pricing-card {
  position: relative; padding: 40px 32px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg-card);
  transition: border-color 0.3s, transform 0.3s;
}
.pricing-card:hover { transform: translateY(-4px); }
.pricing-popular { border-color: var(--accent); }
.pricing-popular:hover { border-color: var(--accent-2); }
.pricing-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  padding: 4px 16px; border-radius: 100px;
  background: var(--gradient); font-size: 0.75rem; font-weight: 600;
  white-space: nowrap;
}
.pricing-tier { font-size: 0.9rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px; }
.pricing-price {
  font-size: 3rem; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 4px;
}
.pricing-price span { font-size: 1rem; font-weight: 500; color: var(--text-secondary); }
.pricing-desc { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 32px; }
.pricing-features { margin-bottom: 32px; }
.pricing-features li {
  padding: 8px 0; font-size: 0.9rem; color: var(--text-secondary);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding-left: 20px; position: relative;
}
.pricing-features li::before {
  content: '✓'; position: absolute; left: 0;
  color: var(--accent); font-weight: 700;
}

@media (max-width: 768px) {
  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
}

/* ====== Testimonials ====== */
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 56px; }
.testimonial-card {
  padding: 32px; border-radius: var(--radius);
  border: 1px solid var(--border); background: var(--bg-card);
}
.testimonial-stars { color: #f59e0b; margin-bottom: 16px; letter-spacing: 2px; }
.testimonial-card > p { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 24px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--gradient); display: flex; align-items: center; justify-content: center;
  font-size: 0.8rem; font-weight: 700;
}
.testimonial-author strong { display: block; font-size: 0.9rem; }
.testimonial-author span { font-size: 0.8rem; color: var(--text-secondary); }

@media (max-width: 768px) {
  .testimonials-grid { grid-template-columns: 1fr; }
}

/* ====== FAQ ====== */
.faq-list { display: flex; flex-direction: column; gap: 2px; margin-top: 56px; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q {
  width: 100%; padding: 20px 0; text-align: left;
  background: none; border: none; cursor: pointer;
  font-family: inherit; font-size: 1.05rem; font-weight: 600;
  color: var(--text); display: flex; justify-content: space-between; align-items: center;
}
.faq-q::after {
  content: '+'; font-size: 1.4rem; font-weight: 400; color: var(--text-secondary);
  transition: transform 0.3s;
}
.faq-item.open .faq-q::after { content: '−'; }
.faq-a {
  max-height: 0; overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-item.open .faq-a { max-height: 300px; padding-bottom: 20px; }
.faq-a p { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.7; }

/* ====== CTA Section ====== */
.section-cta {
  text-align: center;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-cta h2, .section-cta .section-sub { text-align: center; margin-left: auto; margin-right: auto; }
.section-cta .section-sub { margin-bottom: 32px; }

/* ====== Footer ====== */
.footer { padding: 64px 0 32px; border-top: 1px solid var(--border); }
.footer-inner { display: flex; justify-content: space-between; margin-bottom: 48px; }
.footer-brand p { margin-top: 8px; font-size: 0.9rem; color: var(--text-secondary); }
.footer-links { display: flex; gap: 64px; }
.footer-col { display: flex; flex-direction: column; gap: 8px; }
.footer-col h4 { font-size: 0.85rem; font-weight: 600; margin-bottom: 4px; }
.footer-col a { font-size: 0.9rem; color: var(--text-secondary); transition: color 0.2s; }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  display: flex; justify-content: space-between;
  padding-top: 24px; border-top: 1px solid var(--border);
  font-size: 0.85rem; color: var(--text-secondary);
}
.footer-bottom a { color: var(--text-secondary); }
.footer-bottom a:hover { color: var(--text); }

@media (max-width: 768px) {
  .footer-inner { flex-direction: column; gap: 32px; }
  .footer-links { gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
}