/* ============================================
   BackBiome - styles.css
   Design: Medical Professional + Premium Blue
   Font: Montserrat (headings), Open Sans (body)
   ============================================ */

:root {
  --primary: #1E40AF;
  --primary-dark: #1e3a8a;
  --primary-light: #3B82F6;
  --accent: #06B6D4;
  --accent2: #0EA5E9;
  --gold: #F59E0B;
  --success: #10B981;
  --danger: #EF4444;
  --white: #ffffff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --text: #1e293b;
  --gradient: linear-gradient(135deg, #1E40AF 0%, #06B6D4 100%);
  --gradient-rev: linear-gradient(135deg, #06B6D4 0%, #1E40AF 100%);
  --shadow: 0 4px 24px rgba(30,64,175,0.12);
  --shadow-lg: 0 12px 40px rgba(30,64,175,0.2);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; -ms-text-size-adjust: 100%; }
* { -webkit-tap-highlight-color: transparent; }
body { font-family: 'Open Sans', sans-serif; color: var(--text); background: var(--white); overflow-x: hidden; line-height: 1.7; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
input, select, textarea { font-size: 16px; }

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5 { font-family: 'Montserrat', sans-serif; font-weight: 800; line-height: 1.2; }
h1 { font-size: clamp(26px, 5vw, 52px); }
h2 { font-size: clamp(22px, 4vw, 40px); }
h3 { font-size: clamp(18px, 2.5vw, 24px); }
h4 { font-size: clamp(16px, 2vw, 20px); }

/* ===== UTILITY ===== */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.gradient-text { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 { margin-bottom: 12px; }
.section-header p { font-size: 18px; color: var(--gray-600); max-width: 680px; margin: 0 auto; }
.section-eyebrow { font-size: 13px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.stars { color: #F59E0B; font-size: 18px; }

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--gradient); color: var(--white);
  padding: 16px 36px; border-radius: 50px;
  font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 16px;
  border: none; cursor: pointer; transition: var(--transition);
  box-shadow: 0 6px 24px rgba(30,64,175,0.4); min-height: 52px;
  text-align: center; justify-content: center;
}
.btn-primary:hover { transform: scale(1.05); box-shadow: 0 10px 36px rgba(30,64,175,0.55); }
.btn-primary:active { transform: scale(0.98); }
.btn-arrow { transition: transform 0.3s; }
.btn-primary:hover .btn-arrow { transform: translateX(6px); }

/* Pulse animation for nav CTA */
.btn-pulse { animation: pulse-glow 2s infinite; }
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(30,64,175,0.5); }
  50% { box-shadow: 0 0 0 8px rgba(30,64,175,0); }
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.97); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: var(--transition); padding: 12px 0;
}
.navbar.scrolled { padding: 8px 0; box-shadow: var(--shadow); }
.nav-container { display: flex; align-items: center; justify-content: space-between; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.nav-logo { display: flex; align-items: center; gap: 10px; font-family: 'Montserrat', sans-serif; font-weight: 800; font-size: 22px; color: var(--primary-dark); }
.nav-logo img { width: 40px; height: 40px; object-fit: contain; border-radius: 8px; }
.logo-accent { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { font-family: 'Montserrat', sans-serif; font-weight: 600; font-size: 14px; color: var(--gray-700); transition: color 0.2s; padding: 4px 0; }
.nav-links a:hover { color: var(--primary); }
.nav-cta { background: var(--gradient) !important; color: var(--white) !important; padding: 10px 24px !important; border-radius: 50px !important; font-size: 14px !important; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; border: none; background: none; min-width: 48px; min-height: 48px; justify-content: center; align-items: center; }
.hamburger span { display: block; width: 24px; height: 3px; background: var(--primary); border-radius: 3px; transition: var(--transition); }
.hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ===== HERO ===== */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  background: linear-gradient(160deg, #f0f7ff 0%, #e8f4ff 40%, #f8fbff 100%);
  padding: 120px 0 80px; position: relative; overflow: hidden;
}
.hero-bg-animation { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.floating-orb {
  position: absolute; border-radius: 50%;
  animation: float-orb 8s ease-in-out infinite;
}
.orb1 { width: 400px; height: 400px; background: radial-gradient(circle, rgba(30,64,175,0.08) 0%, transparent 70%); top: -100px; right: -100px; animation-delay: 0s; }
.orb2 { width: 300px; height: 300px; background: radial-gradient(circle, rgba(6,182,212,0.08) 0%, transparent 70%); bottom: 50px; left: -50px; animation-delay: 3s; }
.orb3 { width: 200px; height: 200px; background: radial-gradient(circle, rgba(245,158,11,0.07) 0%, transparent 70%); top: 50%; left: 50%; animation-delay: 6s; }
@keyframes float-orb { 0%, 100% { transform: translate(0,0) scale(1); } 33% { transform: translate(20px,-30px) scale(1.05); } 66% { transform: translate(-20px,20px) scale(0.95); } }

.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 1; }
.hero-image { position: relative; display: flex; justify-content: center; align-items: center; }
.product-glow { position: absolute; width: 80%; height: 80%; background: radial-gradient(circle, rgba(30,64,175,0.15) 0%, transparent 70%); border-radius: 50%; animation: glow-pulse 3s ease-in-out infinite; }
@keyframes glow-pulse { 0%, 100% { transform: scale(1); opacity: 0.7; } 50% { transform: scale(1.1); opacity: 1; } }
.hero-bottle { position: relative; z-index: 1; max-width: 380px; width: 100%; filter: drop-shadow(0 30px 60px rgba(30,64,175,0.25)); animation: bottle-float 4s ease-in-out infinite; }
@keyframes bottle-float { 0%, 100% { transform: translateY(0) rotate(-2deg); } 50% { transform: translateY(-20px) rotate(2deg); } }
.hero-badge {
  position: absolute; bottom: 20px; right: 20px;
  background: var(--white); border-radius: 12px; padding: 12px 16px;
  box-shadow: var(--shadow-lg); font-family: 'Montserrat', sans-serif;
  font-weight: 700; font-size: 13px; text-align: center;
  border: 2px solid var(--primary-light); animation: badge-bounce 2s ease-in-out infinite;
  color: var(--primary-dark);
}
@keyframes badge-bounce { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }

.hero-eyebrow { display: inline-block; background: rgba(30,64,175,0.1); color: var(--primary); padding: 8px 18px; border-radius: 50px; font-size: 13px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 16px; }
.hero-content h1 { margin-bottom: 20px; color: var(--gray-800); }
.hero-content p { color: var(--gray-600); margin-bottom: 16px; font-size: 17px; }
.hero-stats { display: flex; align-items: center; gap: 24px; margin: 28px 0; }
.stat { text-align: center; display: flex; flex-direction: column; }
.stat strong { font-family: 'Montserrat', sans-serif; font-size: 22px; font-weight: 800; color: var(--primary); }
.stat span { font-size: 12px; color: var(--gray-600); font-weight: 600; }
.stat-divider { width: 1px; height: 40px; background: var(--gray-200); }
.hero-cta { font-size: 18px; padding: 18px 40px; width: 100%; max-width: 400px; margin-bottom: 12px; }
.hero-disclaimer { font-size: 13px; color: var(--primary); font-weight: 600; }

/* ===== WHY CHOOSE ===== */
.why-choose { padding: 90px 0; background: var(--white); }
.badges-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.badge-card {
  background: var(--gray-50); border-radius: var(--radius); padding: 32px 24px;
  text-align: center; border: 1px solid var(--gray-200); transition: var(--transition);
  cursor: default;
}
.badge-card:hover { transform: scale(1.05) rotate(1deg); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.badge-icon { width: 80px; height: 80px; margin: 0 auto 16px; display: flex; align-items: center; justify-content: center; }
.badge-icon img { width: 80px; height: 80px; object-fit: contain; }
.icon-fallback { font-size: 48px; }
.badge-card h3 { font-size: 16px; color: var(--primary-dark); margin-bottom: 12px; }
.badge-card p { font-size: 14px; color: var(--gray-600); line-height: 1.7; }

/* ===== WHAT IS ===== */
.what-is { padding: 90px 0; background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%); }
.what-is-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.what-is-image { position: relative; }
.what-is-image img { border-radius: 20px; box-shadow: var(--shadow-lg); width: 100%; }
.image-badge-float {
  position: absolute; top: 20px; left: 20px;
  background: var(--gradient); color: var(--white);
  padding: 8px 18px; border-radius: 50px;
  font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 13px;
}
.what-is-content h2 { margin-bottom: 16px; }
.what-is-content p { color: var(--gray-600); margin-bottom: 16px; font-size: 16px; }
.what-is-content .btn-primary { margin-top: 10px; }

/* ===== HOW IT WORKS ===== */
.how-works { padding: 90px 0; background: var(--white); }
.accordion-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.accordion-item { border: 2px solid var(--gray-200); border-radius: var(--radius); overflow: hidden; transition: border-color 0.3s; }
.accordion-item.active { border-color: var(--primary-light); }
.accordion-header {
  width: 100%; background: none; border: none; cursor: pointer;
  padding: 20px 24px; display: flex; align-items: center; gap: 14px;
  font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 16px;
  color: var(--gray-800); text-align: left; min-height: 64px; transition: background 0.2s;
}
.accordion-header:hover { background: var(--gray-50); }
.accordion-item.active .accordion-header { background: linear-gradient(135deg, rgba(30,64,175,0.05) 0%, rgba(6,182,212,0.05) 100%); }
.acc-icon { font-size: 22px; flex-shrink: 0; }
.acc-title { flex: 1; }
.acc-arrow { font-size: 14px; transition: transform 0.35s; color: var(--primary); flex-shrink: 0; }
.accordion-item.active .acc-arrow { transform: rotate(180deg); }
.accordion-body { max-height: 0; overflow: hidden; transition: max-height 0.45s ease, padding 0.3s; }
.accordion-body p { padding: 0 24px 20px; color: var(--gray-600); line-height: 1.8; font-size: 15px; }
.accordion-item.active .accordion-body { max-height: 500px; }

/* ===== REVIEWS ===== */
.reviews { padding: 90px 0; background: linear-gradient(135deg, #f0f7ff 0%, #f8fbff 100%); }
.overall-rating { display: flex; align-items: center; gap: 10px; justify-content: center; margin-top: 12px; font-size: 15px; color: var(--gray-600); }
.overall-rating strong { font-family: 'Montserrat', sans-serif; font-size: 22px; color: var(--primary-dark); }
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review-card {
  background: var(--white); border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow); border: 1px solid var(--gray-200);
  transition: var(--transition); animation-delay: var(--delay, 0s);
}
.review-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.reviewer-top { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; flex-wrap: wrap; }
.reviewer-avatar { width: 56px; height: 56px; border-radius: 50%; overflow: hidden; border: 3px solid var(--primary-light); flex-shrink: 0; }
.reviewer-avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar-fallback { width: 56px; height: 56px; border-radius: 50%; background: var(--gradient); color: white; display: flex; align-items: center; justify-content: center; font-family: 'Montserrat', sans-serif; font-weight: 800; font-size: 18px; }
.reviewer-info strong { display: block; font-family: 'Montserrat', sans-serif; font-weight: 700; color: var(--gray-800); }
.reviewer-info span { font-size: 13px; color: var(--gray-600); }
.verified-badge { margin-left: auto; background: rgba(16,185,129,0.1); color: var(--success); padding: 4px 10px; border-radius: 50px; font-size: 12px; font-weight: 700; white-space: nowrap; }
.review-card p { color: var(--gray-700); font-size: 15px; line-height: 1.7; }

/* ===== PRICING ===== */
.pricing { padding: 90px 0; background: var(--white); }
.pricing-2 { background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%); }
.countdown-wrapper { display: flex; align-items: center; justify-content: center; gap: 16px; margin-top: 20px; flex-wrap: wrap; }
.countdown-label { font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 16px; color: var(--danger); }
.countdown { display: flex; align-items: center; gap: 8px; }
.time-block { background: var(--gradient); color: var(--white); padding: 12px 18px; border-radius: var(--radius-sm); text-align: center; min-width: 64px; }
.time-block span { display: block; font-family: 'Montserrat', sans-serif; font-weight: 900; font-size: 28px; }
.time-block small { font-size: 11px; text-transform: uppercase; opacity: 0.85; }
.time-sep { font-family: 'Montserrat', sans-serif; font-weight: 900; font-size: 28px; color: var(--primary); }

.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; align-items: start; }
.price-card {
  background: var(--white); border-radius: 20px; padding: 32px 24px;
  text-align: center; border: 2px solid var(--gray-200);
  box-shadow: var(--shadow); transition: var(--transition);
  position: relative; overflow: visible;
}
.price-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.price-card.popular { border-color: var(--primary); box-shadow: 0 12px 48px rgba(30,64,175,0.25); transform: scale(1.03); }
.price-card.popular:hover { transform: scale(1.03) translateY(-8px); }
.popular-badge {
  position: absolute; top: -16px; left: 50%; transform: translateX(-50%);
  background: var(--gradient); color: var(--white);
  padding: 6px 20px; border-radius: 50px;
  font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 12px; white-space: nowrap;
}
.price-label { font-family: 'Montserrat', sans-serif; font-weight: 800; font-size: 12px; letter-spacing: 2px; color: var(--primary); text-transform: uppercase; margin-bottom: 6px; }
.bottles-count { font-family: 'Montserrat', sans-serif; font-weight: 800; font-size: 24px; color: var(--gray-800); }
.supply { font-size: 13px; color: var(--gray-600); margin-bottom: 16px; }
.price-card img { max-width: 160px; margin: 0 auto 16px; }
.free-badges { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin-bottom: 12px; }
.free-tag { background: rgba(16,185,129,0.1); color: var(--success); padding: 4px 10px; border-radius: 50px; font-size: 12px; font-weight: 700; }
.price-display { margin-bottom: 20px; }
.price-old { text-decoration: line-through; color: var(--gray-600); font-size: 16px; margin-right: 8px; }
.price-new { font-family: 'Montserrat', sans-serif; font-weight: 900; font-size: 36px; color: var(--danger); }
.per-bottle { font-size: 14px; color: var(--gray-600); }
.price-display small { display: block; font-size: 13px; color: var(--gray-600); }
.btn-price {
  display: block; width: 100%; padding: 16px;
  background: var(--gradient); color: var(--white);
  border-radius: 50px; font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 16px;
  border: none; cursor: pointer; transition: var(--transition);
  box-shadow: 0 6px 20px rgba(30,64,175,0.35); min-height: 52px; text-align: center;
  margin-bottom: 14px;
}
.btn-price:hover { transform: scale(1.05); box-shadow: 0 10px 30px rgba(30,64,175,0.5); }
.btn-price:active { transform: scale(0.98); }
.popular-btn { background: linear-gradient(135deg, var(--gold) 0%, #f97316 100%); box-shadow: 0 6px 20px rgba(245,158,11,0.4); }
.popular-btn:hover { box-shadow: 0 10px 30px rgba(245,158,11,0.55); }
.payment-icons { max-width: 180px; margin: 0 auto; }
.star-rating-img { text-align: center; margin-top: 30px; }
.star-rating-img img { max-width: 200px; margin: 0 auto; }
.stars-text { font-family: 'Montserrat', sans-serif; font-size: 22px; color: #F59E0B; font-weight: 800; text-align: center; }

/* ===== BONUS ===== */
.bonus-section { padding: 90px 0; background: linear-gradient(135deg, #e8f4ff 0%, #f0f7ff 100%); }
.bonus-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
.bonus-card {
  background: var(--white); border-radius: 20px; padding: 36px 32px;
  box-shadow: var(--shadow); text-align: center;
  border: 2px solid var(--gray-200); transition: var(--transition);
}
.bonus-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
.bonus-number { font-family: 'Montserrat', sans-serif; font-weight: 800; font-size: 11px; letter-spacing: 2px; color: var(--accent); text-transform: uppercase; margin-bottom: 10px; }
.bonus-card img { max-width: 260px; margin: 0 auto 20px; border-radius: 12px; }
.bonus-card h3 { color: var(--primary-dark); margin-bottom: 12px; font-size: 18px; }
.bonus-card p { color: var(--gray-600); font-size: 15px; line-height: 1.7; }

/* ===== INGREDIENTS ===== */
.ingredients { padding: 90px 0; background: var(--white); }
.ingredients-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ingredient-card {
  background: var(--gray-50); border-radius: var(--radius); padding: 28px;
  border: 1px solid var(--gray-200); transition: var(--transition);
}
.ingredient-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--primary-light); }
.ing-icon { font-size: 32px; margin-bottom: 12px; }
.ingredient-card h3 { font-size: 15px; color: var(--primary-dark); margin-bottom: 10px; }
.ingredient-card p { font-size: 14px; color: var(--gray-600); line-height: 1.7; }

/* ===== SCIENCE ===== */
.science { padding: 90px 0; background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%); }
.science-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.science-card {
  background: var(--white); border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow); border: 1px solid var(--gray-200); transition: var(--transition);
}
.science-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.sci-header { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.sci-num { font-family: 'Montserrat', sans-serif; font-weight: 900; font-size: 36px; color: var(--gray-200); line-height: 1; }
.sci-header h3 { font-size: 15px; color: var(--primary-dark); }
.science-card p { font-size: 14px; color: var(--gray-600); line-height: 1.8; }
.sci-ref { margin-top: 14px; font-size: 12px; color: var(--accent); font-style: italic; border-top: 1px solid var(--gray-200); padding-top: 10px; }

/* ===== GUARANTEE ===== */
.guarantee { padding: 90px 0; background: var(--white); }
.guarantee-inner { display: grid; grid-template-columns: 1fr 1.5fr; gap: 60px; align-items: center; }
.guarantee-image img { width: 100%; border-radius: 20px; box-shadow: var(--shadow-lg); }
.guarantee-badge { display: inline-block; background: rgba(16,185,129,0.1); color: var(--success); padding: 8px 18px; border-radius: 50px; font-size: 13px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 14px; }
.guarantee-content h2 { margin-bottom: 14px; }
.guarantee-content > p { color: var(--gray-600); margin-bottom: 24px; font-size: 16px; }
.guarantee-points { display: flex; flex-direction: column; gap: 20px; margin-bottom: 28px; }
.guarantee-point { display: flex; gap: 16px; }
.gp-icon { font-size: 28px; flex-shrink: 0; }
.guarantee-point strong { display: block; font-family: 'Montserrat', sans-serif; font-weight: 700; color: var(--gray-800); margin-bottom: 4px; font-size: 15px; }
.guarantee-point p { font-size: 14px; color: var(--gray-600); line-height: 1.7; }

/* ===== BENEFITS ===== */
.benefits { padding: 90px 0; background: linear-gradient(135deg, #f0f7ff 0%, #f8fbff 100%); }
.benefits-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 900px; margin: 0 auto; }
.benefit-item { display: flex; gap: 16px; background: var(--white); border-radius: var(--radius); padding: 20px 24px; box-shadow: var(--shadow); border: 1px solid var(--gray-200); transition: var(--transition); }
.benefit-item:hover { transform: translateX(6px); border-color: var(--primary-light); }
.benefit-check { font-size: 22px; flex-shrink: 0; line-height: 1; }
.benefit-item strong { display: block; font-family: 'Montserrat', sans-serif; font-weight: 700; color: var(--primary-dark); margin-bottom: 4px; font-size: 15px; }
.benefit-item p { font-size: 14px; color: var(--gray-600); line-height: 1.6; }

/* ===== FAQ ===== */
.faq-section { padding: 90px 0; background: var(--white); }
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 2px solid var(--gray-200); border-radius: var(--radius); overflow: hidden; transition: border-color 0.3s; }
.faq-item.active { border-color: var(--primary-light); }
.faq-header {
  width: 100%; background: none; border: none; cursor: pointer;
  padding: 20px 24px; display: flex; align-items: center; justify-content: space-between;
  font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 15px;
  color: var(--gray-800); text-align: left; min-height: 64px; transition: background 0.2s;
}
.faq-header:hover { background: var(--gray-50); }
.faq-item.active .faq-header { background: rgba(30,64,175,0.04); }
.faq-arrow { font-size: 22px; transition: transform 0.35s; color: var(--primary); flex-shrink: 0; margin-left: 16px; }
.faq-item.active .faq-arrow { transform: rotate(45deg); }
.faq-body { max-height: 0; overflow: hidden; transition: max-height 0.45s ease; }
.faq-body p { padding: 0 24px 20px; color: var(--gray-600); line-height: 1.8; font-size: 15px; }
.faq-item.active .faq-body { max-height: 600px; }

/* ===== FINAL CTA ===== */
.final-cta {
  padding: 100px 0; text-align: center;
  background: linear-gradient(160deg, #0c1c6b 0%, #1E40AF 50%, #06B6D4 100%);
  position: relative; overflow: hidden;
}
.final-cta-bg { position: absolute; inset: 0; pointer-events: none; }
.final-orb { position: absolute; border-radius: 50%; }
.f1 { width: 500px; height: 500px; background: radial-gradient(circle, rgba(6,182,212,0.2) 0%, transparent 70%); top: -100px; right: -100px; animation: float-orb 10s ease-in-out infinite; }
.f2 { width: 400px; height: 400px; background: radial-gradient(circle, rgba(245,158,11,0.1) 0%, transparent 70%); bottom: -50px; left: -50px; animation: float-orb 12s ease-in-out infinite reverse; }
.final-inner { position: relative; z-index: 1; }
.final-image { max-width: 300px; margin: 0 auto 32px; filter: drop-shadow(0 20px 60px rgba(0,0,0,0.3)); animation: bottle-float 4s ease-in-out infinite; }
.final-inner h2 { color: var(--white); font-size: clamp(26px, 4vw, 44px); margin-bottom: 20px; line-height: 1.25; }
.final-inner h2 .gradient-text { background: linear-gradient(135deg, #F59E0B, #f97316); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.final-price { margin-bottom: 20px; }
.final-old { display: block; color: rgba(255,255,255,0.6); font-size: 18px; margin-bottom: 8px; }
.final-new { display: block; font-family: 'Montserrat', sans-serif; font-weight: 900; font-size: 36px; color: #F59E0B; }
.final-inner > p { color: rgba(255,255,255,0.85); font-size: 17px; margin-bottom: 32px; }
.btn-final {
  font-size: 20px; padding: 22px 56px;
  background: linear-gradient(135deg, #F59E0B, #f97316);
  box-shadow: 0 12px 40px rgba(245,158,11,0.5);
  animation: final-pulse 2.5s infinite;
}
@keyframes final-pulse {
  0%, 100% { box-shadow: 0 12px 40px rgba(245,158,11,0.5); }
  50% { box-shadow: 0 12px 60px rgba(245,158,11,0.8), 0 0 0 12px rgba(245,158,11,0.1); }
}
.final-badges { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 28px; }
.final-badges span { background: rgba(255,255,255,0.1); color: var(--white); padding: 8px 16px; border-radius: 50px; font-size: 13px; font-weight: 600; backdrop-filter: blur(4px); }

/* ===== FOOTER ===== */
.footer { background: var(--gray-800); color: var(--white); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; margin-bottom: 40px; }
.footer-logo { display: flex; align-items: center; gap: 10px; font-family: 'Montserrat', sans-serif; font-weight: 800; font-size: 22px; margin-bottom: 16px; }
.footer-logo img { width: 36px; height: 36px; object-fit: contain; border-radius: 8px; }
.footer-col p { color: rgba(255,255,255,0.65); font-size: 14px; line-height: 1.8; }
.footer-col h4 { font-family: 'Montserrat', sans-serif; font-weight: 700; font-size: 14px; letter-spacing: 1px; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: rgba(255,255,255,0.7); font-size: 14px; transition: color 0.2s; }
.footer-col ul a:hover { color: var(--white); }
.social-links { display: flex; gap: 10px; margin-top: 20px; }
.social-icon {
  width: 40px; height: 40px; background: rgba(255,255,255,0.1);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 14px; transition: var(--transition);
}
.social-icon:hover { background: var(--primary-light); transform: translateY(-3px); }
.footer-legal-links { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.legal-link { color: rgba(255,255,255,0.7); font-size: 13px; transition: color 0.2s; }
.legal-link:hover { color: var(--white); }
.link-separator { color: rgba(255,255,255,0.3); font-size: 13px; }
.footer-disclaimer { border-top: 1px solid rgba(255,255,255,0.1); padding: 28px 0; }
.footer-disclaimer p { font-size: 13px; color: rgba(255,255,255,0.5); line-height: 1.8; margin-bottom: 8px; }

/* ===== SCROLL TOP ===== */
.scroll-top {
  position: fixed; bottom: 24px; right: 24px; z-index: 500;
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--gradient); color: var(--white);
  border: none; cursor: pointer; font-size: 20px; font-weight: 700;
  box-shadow: var(--shadow-lg); transition: var(--transition);
  opacity: 0; pointer-events: none; transform: translateY(20px);
}
.scroll-top.visible { opacity: 1; pointer-events: all; transform: translateY(0); }
.scroll-top:hover { transform: translateY(-4px); }

/* ===== PURCHASE POPUP ===== */
.purchase-popup {
  position: fixed; bottom: 24px; left: 24px; z-index: 900;
  background: var(--white); border-radius: var(--radius); padding: 14px 18px;
  box-shadow: var(--shadow-lg); display: flex; align-items: center; gap: 12px;
  max-width: 300px; border: 1px solid var(--gray-200);
  transform: translateX(-120%); transition: transform 0.4s cubic-bezier(0.4,0,0.2,1);
}
.purchase-popup.show { transform: translateX(0); }
.popup-avatar { font-size: 28px; flex-shrink: 0; }
.popup-text { font-size: 13px; line-height: 1.5; }
.popup-text strong { display: block; color: var(--gray-800); font-weight: 700; }
.popup-text span { color: var(--gray-600); }
.popup-close { background: none; border: none; cursor: pointer; color: var(--gray-600); font-size: 16px; padding: 4px; min-width: 28px; min-height: 28px; flex-shrink: 0; border-radius: 50%; transition: background 0.2s; }
.popup-close:hover { background: var(--gray-100); }

/* ===== EXIT POPUP ===== */
.exit-popup-overlay {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.6); display: flex; align-items: center; justify-content: center;
  padding: 20px; opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.exit-popup-overlay.show { opacity: 1; pointer-events: all; }
.exit-popup {
  background: var(--white); border-radius: 24px; padding: 48px 40px;
  max-width: 460px; width: 100%; text-align: center; position: relative;
  box-shadow: 0 30px 80px rgba(0,0,0,0.3); transform: scale(0.9);
  transition: transform 0.3s; animation: popup-in 0.3s ease forwards;
}
@keyframes popup-in { to { transform: scale(1); } }
.exit-popup-close { position: absolute; top: 16px; right: 16px; background: var(--gray-100); border: none; cursor: pointer; width: 36px; height: 36px; border-radius: 50%; font-size: 16px; transition: background 0.2s; }
.exit-popup-close:hover { background: var(--gray-200); }
.exit-emoji { font-size: 48px; margin-bottom: 16px; }
.exit-popup h3 { font-family: 'Montserrat', sans-serif; font-weight: 800; font-size: 24px; color: var(--gray-800); margin-bottom: 12px; }
.exit-popup p { color: var(--gray-600); margin-bottom: 16px; font-size: 16px; }
.exit-price { font-family: 'Montserrat', sans-serif; font-size: 28px; color: var(--danger); margin-bottom: 24px; }
.exit-cta { width: 100%; font-size: 17px; padding: 16px; display: block; }
.exit-dismiss { display: block; margin-top: 14px; font-size: 12px; color: var(--gray-600); text-decoration: underline; cursor: pointer; }
.exit-dismiss:hover { color: var(--primary); }

/* ===== AOS ANIMATIONS ===== */
[data-aos] { opacity: 0; transition: opacity 0.7s ease, transform 0.7s ease; }
[data-aos="fade-up"] { transform: translateY(40px); }
[data-aos="fade-right"] { transform: translateX(-40px); }
[data-aos="fade-left"] { transform: translateX(40px); }
[data-aos="slide-up"] { transform: translateY(60px); }
[data-aos].aos-animate { opacity: 1; transform: translate(0) !important; }

/* ===== MOBILE OVERLAY ===== */
.mobile-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 998; opacity: 0; transition: opacity 0.3s; }
.mobile-overlay.show { opacity: 1; }

/* ===== MEDIA QUERIES ===== */

/* Tablet: 768px */
@media (max-width: 991px) {
  .badges-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .science-grid { grid-template-columns: repeat(2, 1fr); }
  .ingredients-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid .footer-col:first-child { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  /* NAV */
  .hamburger { display: flex; }
  .nav-links {
    position: fixed; top: 0; right: -100%; height: 100vh; width: 80%; max-width: 320px;
    background: var(--white); flex-direction: column; justify-content: center; align-items: center;
    gap: 32px; z-index: 999; transition: right 0.4s cubic-bezier(0.4,0,0.2,1);
    box-shadow: -10px 0 40px rgba(0,0,0,0.15);
  }
  .nav-links.open { right: 0; }
  .mobile-overlay { display: block; }
  .nav-links a { font-size: 18px; }
  .nav-cta { padding: 14px 32px !important; font-size: 16px !important; }

  /* HERO */
  .hero { padding: 100px 0 60px; }
  .hero-inner { grid-template-columns: 1fr; gap: 30px; text-align: center; }
  .hero-image { order: -1; }
  .hero-bottle { max-width: 240px; }
  .hero-stats { justify-content: center; }
  .hero-cta { max-width: 100%; }

  /* SECTIONS */
  .what-is-inner { grid-template-columns: 1fr; }
  .what-is-image { order: -1; }
  .guarantee-inner { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr; }
  .bonus-grid { grid-template-columns: 1fr; }

  /* PRICING */
  .pricing-grid { grid-template-columns: 1fr; max-width: 360px; margin-left: auto; margin-right: auto; }
  .price-card.popular { transform: scale(1); }
  .price-card.popular:hover { transform: translateY(-8px); }

  /* FOOTER */
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid .footer-col:first-child { grid-column: auto; }
  .footer-legal-links { justify-content: center; }
  .social-links { justify-content: center; }
  .footer-col { text-align: center; }
  .footer-col ul { display: flex; flex-wrap: wrap; justify-content: center; gap: 4px; }
  .footer-col ul li { margin-bottom: 4px; }
}

@media (max-width: 575px) {
  .badges-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .science-grid { grid-template-columns: 1fr; }
  .ingredients-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 8px; }
  .stat-divider { width: 60px; height: 1px; }
  .final-badges { flex-direction: column; align-items: center; }
  .purchase-popup { max-width: calc(100vw - 32px); left: 16px; bottom: 16px; }
  .exit-popup { padding: 32px 24px; }
  h1 { font-size: 26px; }
  h2 { font-size: 22px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}