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

:root {
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --bg-dark: #0c1222;
  --bg-darker: #080e1a;
  --surface: #ffffff;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-on-dark: #e2e8f0;
  --text-on-dark-muted: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --accent: #10b981;
  --accent-light: rgba(16, 185, 129, 0.1);
  --accent-glow: rgba(16, 185, 129, 0.15);
  --blue: #3b82f6;
  --blue-light: rgba(59, 130, 246, 0.1);
  --purple: #8b5cf6;
  --purple-light: rgba(139, 92, 246, 0.1);
  --amber: #f59e0b;
  --amber-light: rgba(245, 158, 11, 0.1);
  --radius: 12px;
  --radius-lg: 20px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.04), 0 2px 4px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.04), 0 4px 6px rgba(0,0,0,0.06);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* === NAVIGATION === */
.nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  padding: 0 40px;
  height: 72px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: all var(--transition);
}

.nav-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-brand .brand-mark {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.85rem;
  font-weight: 700;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
}

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

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.nav-cta {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 10px 20px;
  background: var(--accent);
  color: white;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-cta:hover {
  background: #0ea572;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

/* Mobile nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--text);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* === HERO === */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 140px 40px 100px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -200px;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -150px;
  left: -100px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--blue-light) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.hero-label {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--accent);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -2px;
  color: var(--text);
  max-width: 700px;
  margin-bottom: 28px;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero-sub {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.75;
  font-weight: 400;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: #0ea572;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--text);
  transform: translateY(-1px);
}

.btn-on-dark {
  background: white;
  color: var(--bg-dark);
}

.btn-on-dark:hover {
  background: #f1f5f9;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.15);
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero-scroll .scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* === SECTION COMMONS === */
.section {
  padding: 100px 40px;
  position: relative;
}

.section-alt {
  background: var(--bg-alt);
}

.section-dark {
  background: var(--bg-dark);
  color: var(--text-on-dark);
}

.section-darker {
  background: var(--bg-darker);
  color: var(--text-on-dark);
}

.section-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.section-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.section-dark .section-label {
  color: var(--accent);
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -1px;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 20px;
  max-width: 600px;
}

.section-dark .section-title {
  color: white;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.section-dark .section-subtitle {
  color: var(--text-on-dark-muted);
}

/* === FOUNDATION / TRUST CARDS === */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 48px;
}

.trust-card {
  background: var(--surface);
  padding: 48px 36px;
  position: relative;
  transition: all var(--transition);
}

.trust-card:hover {
  background: var(--bg-alt);
}

.trust-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 1.4rem;
}

.trust-card-icon.green { background: var(--accent-light); color: var(--accent); }
.trust-card-icon.blue { background: var(--blue-light); color: var(--blue); }
.trust-card-icon.purple { background: var(--purple-light); color: var(--purple); }

.trust-card h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}

.trust-card p {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* === COA EDUCATION === */
.coa-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.coa-content h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
  color: var(--text);
}

.coa-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 16px;
}

.coa-content p strong {
  color: var(--text);
}

.coa-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.95rem;
  margin-top: 8px;
  transition: gap var(--transition);
}

.coa-link:hover {
  gap: 12px;
}

.coa-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

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

.coa-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

.coa-card h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}

.coa-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 0;
}

.coa-card .card-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  font-size: 1.1rem;
  background: var(--accent-light);
  color: var(--accent);
}

/* === CTA BAND === */
.cta-band {
  padding: 80px 40px;
  text-align: center;
}

.cta-band .section-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cta-band h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.5px;
  color: white;
  margin-bottom: 12px;
}

.cta-band p {
  color: var(--text-on-dark-muted);
  font-size: 1rem;
  margin-bottom: 32px;
  max-width: 450px;
}

/* === VERIFICATION STEPS === */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 48px;
}

.step-card {
  position: relative;
}

.step-number {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: rgba(16, 185, 129, 0.15);
  line-height: 1;
  margin-bottom: 16px;
}

.step-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}

.step-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* === COMPOUND CARDS === */
.compounds-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 40px;
}

.compounds-header .view-all {
  color: var(--accent);
  font-weight: 600;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition);
}

.compounds-header .view-all:hover {
  gap: 10px;
}

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

.compound-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.compound-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.compound-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 16px;
  width: fit-content;
}

.compound-tag.metabolic { background: var(--blue-light); color: var(--blue); }
.compound-tag.mitochondrial { background: var(--purple-light); color: var(--purple); }
.compound-tag.coenzyme { background: var(--amber-light); color: var(--amber); }
.compound-tag.copper { background: var(--accent-light); color: var(--accent); }

.compound-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
}

.compound-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
}

.compound-card .learn-more {
  margin-top: 20px;
  color: var(--accent);
  font-weight: 600;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition);
}

.compound-card:hover .learn-more {
  gap: 10px;
}

/* Two wider cards on second row */
.compounds-grid-wide {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 20px;
}

/* === FOOTER === */
.footer {
  padding: 60px 40px 40px;
  border-top: 1px solid var(--border-light);
  background: var(--bg);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand .brand-mark {
  width: 28px;
  height: 28px;
  background: var(--accent);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
}

.footer-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 300px;
}

.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text);
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-col ul a:hover {
  color: var(--accent);
}

.footer-bottom {
  max-width: 1200px;
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-badge {
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 6px 14px;
  background: var(--bg-alt);
  border-radius: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

/* === PAGE STUB === */
.page-stub {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 140px 40px 100px;
  text-align: center;
}

.page-stub .stub-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 32px;
  font-size: 2rem;
  background: var(--accent-light);
  color: var(--accent);
}

.page-stub h1 {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 16px;
  color: var(--text);
}

.page-stub p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 480px;
  line-height: 1.7;
  margin-bottom: 32px;
}

.page-stub .badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.page-stub .badge .pulse {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* === COMING SOON TAG === */
.coming-soon-tag {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--amber);
  background: var(--amber-light);
  padding: 3px 8px;
  border-radius: 4px;
  margin-left: 6px;
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  .compounds-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .nav {
    padding: 0 20px;
    height: 64px;
  }

  .nav-links { display: none; }
  .nav-toggle { display: block; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    padding: 20px;
    gap: 16px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
  }

  .hero {
    padding: 120px 24px 80px;
    min-height: auto;
  }

  .hero h1 {
    letter-spacing: -1px;
  }

  .section {
    padding: 60px 24px;
  }

  .trust-grid {
    grid-template-columns: 1fr;
  }

  .coa-section {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .compounds-grid,
  .compounds-grid-wide {
    grid-template-columns: 1fr;
  }

  .cta-band {
    padding: 60px 24px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }

  .hero-scroll { display: none; }
}

@media (max-width: 480px) {
  .hero {
    padding: 100px 16px 60px;
  }

  .section {
    padding: 48px 16px;
  }

  .trust-card {
    padding: 32px 24px;
  }

  .coa-cards {
    grid-template-columns: 1fr;
  }

  .btn {
    padding: 12px 22px;
    font-size: 0.9rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    text-align: center;
    justify-content: center;
  }
}