/* ============================================
   BIO BRAIN - Premium Cognitive Supplement
   Design: Medical Professional + Premium Luxury
   ============================================ */

/* --- 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: 'Nunito', sans-serif; background: #f8faff; color: #1a2033; line-height: 1.7; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; transition: all 0.3s; }

/* --- CSS VARIABLES --- */
:root {
  --primary: #0f2a6e;
  --primary2: #1a4db3;
  --accent: #d4a017;
  --accent2: #f0bf2e;
  --light: #f0f6ff;
  --white: #ffffff;
  --dark: #0a1628;
  --text: #2d3b58;
  --text-light: #6b7a99;
  --shadow: 0 8px 32px rgba(15,42,110,0.13);
  --shadow-lg: 0 20px 60px rgba(15,42,110,0.2);
  --radius: 18px;
  --radius-sm: 10px;
  --gradient: linear-gradient(135deg, #0f2a6e 0%, #1a4db3 100%);
  --gradient-gold: linear-gradient(135deg, #d4a017 0%, #f0bf2e 100%);
}

/* --- CONTAINER --- */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* --- SECTION PADDING --- */
.section-pad { padding: 70px 0; }
.bg-light { background: var(--light); }

/* --- TYPOGRAPHY --- */
.section-title { font-family: 'Playfair Display', serif; font-size: clamp(26px, 4vw, 40px); color: var(--primary); text-align: center; margin-bottom: 16px; font-weight: 900; }
.section-title span { color: var(--accent); }
.section-sub { text-align: center; color: var(--text-light); font-size: clamp(15px, 2vw, 17px); max-width: 600px; margin: 0 auto 40px; }

/* --- BUTTONS --- */
.btn-primary {
  display: inline-flex; flex-direction: column; align-items: center; justify-content: center;
  background: var(--gradient-gold); color: var(--dark); font-family: 'Nunito', sans-serif;
  font-weight: 800; font-size: clamp(15px, 2vw, 18px); padding: 16px 36px; border-radius: 50px;
  border: none; cursor: pointer; min-height: 48px; transition: all 0.3s;
  box-shadow: 0 6px 24px rgba(212,160,23,0.4); text-align: center; line-height: 1.2;
}
.btn-primary:hover { transform: scale(1.05); box-shadow: 0 12px 36px rgba(212,160,23,0.55); }
.btn-primary:active { transform: scale(0.98); }
.btn-sub { font-size: 11px; font-weight: 600; opacity: 0.85; margin-top: 4px; }
.btn-sm { padding: 12px 24px; font-size: 14px; }
.btn-nav {
  background: var(--gradient-gold); color: var(--dark); font-weight: 800;
  padding: 10px 24px; border-radius: 50px; font-size: 14px; min-height: 44px;
  display: inline-flex; align-items: center; transition: all 0.3s;
}
.btn-nav:hover { transform: scale(1.05); box-shadow: 0 6px 20px rgba(212,160,23,0.4); }

/* ============================================
   SECTION 1: NAVIGATION
   ============================================ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.97); backdrop-filter: blur(12px);
  box-shadow: 0 2px 20px rgba(15,42,110,0.1); transition: all 0.3s;
}
.navbar.scrolled { box-shadow: 0 4px 30px rgba(15,42,110,0.18); padding: 0; }
.nav-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; }
.brand { font-family: 'Playfair Display', serif; font-size: 24px; font-weight: 900; color: var(--primary); }
.brand span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: var(--text); font-weight: 700; font-size: 14px; }
.nav-links a:hover { color: var(--primary2); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; background: none; border: none; padding: 8px; }
.hamburger span { width: 24px; height: 2px; background: var(--primary); border-radius: 2px; transition: all 0.3s; display: block; }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ============================================
   SECTION 2: HERO
   ============================================ */
.hero {
  min-height: 100vh; padding: 130px 0 80px;
  background: linear-gradient(135deg, #0a1628 0%, #0f2a6e 50%, #1a4db3 100%);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(212,160,23,0.12) 0%, transparent 60%);
}
/* Particles */
.hero-particles { position: absolute; inset: 0; overflow: hidden; z-index: 0; }
.particle {
  position: absolute; width: 4px; height: 4px; background: rgba(212,160,23,0.5);
  border-radius: 50%; animation: floatParticle linear infinite;
}
@keyframes floatParticle {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100px) rotate(720deg); opacity: 0; }
}
.hero-inner { display: flex; align-items: center; gap: 60px; position: relative; z-index: 1; }
.hero-img-wrap { position: relative; flex: 0 0 auto; max-width: 380px; width: 100%; }
.hero-glow {
  position: absolute; width: 320px; height: 320px; background: radial-gradient(circle, rgba(212,160,23,0.25) 0%, transparent 70%);
  border-radius: 50%; top: 50%; left: 50%; transform: translate(-50%,-50%); animation: pulse 3s ease-in-out infinite;
}
@keyframes pulse { 0%,100% { transform: translate(-50%,-50%) scale(1); opacity: 0.6; } 50% { transform: translate(-50%,-50%) scale(1.2); opacity: 1; } }
.hero-bottle { width: 100%; max-width: 340px; margin: 0 auto; animation: floatBottle 4s ease-in-out infinite; filter: drop-shadow(0 30px 60px rgba(0,0,0,0.4)); }
@keyframes floatBottle { 0%,100% { transform: translateY(0px) rotate(-2deg); } 50% { transform: translateY(-18px) rotate(2deg); } }
.float-badge {
  position: absolute; background: rgba(255,255,255,0.15); backdrop-filter: blur(10px);
  color: white; border: 1px solid rgba(255,255,255,0.2); padding: 8px 14px; border-radius: 30px;
  font-size: 12px; font-weight: 700; animation: floatBadge 3s ease-in-out infinite;
}
.badge-1 { top: 20%; right: -10px; animation-delay: 0.5s; }
.badge-2 { bottom: 25%; left: -10px; animation-delay: 1s; }
@keyframes floatBadge { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
.hero-content { flex: 1; color: white; }
.hero-eyebrow { background: rgba(212,160,23,0.2); border: 1px solid rgba(212,160,23,0.4); color: var(--accent2); display: inline-block; padding: 6px 16px; border-radius: 30px; font-size: 13px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; margin-bottom: 20px; }
.hero h1 { font-family: 'Playfair Display', serif; font-size: clamp(28px, 4.5vw, 52px); font-weight: 900; line-height: 1.15; margin-bottom: 20px; }
.hero h1 em { color: var(--accent2); font-style: normal; }
.hero p { font-size: clamp(15px, 1.8vw, 17px); opacity: 0.9; margin-bottom: 16px; max-width: 520px; }
.hero-rating { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.hero-rating img { height: 24px; width: auto; }
.hero-rating span { color: rgba(255,255,255,0.85); font-size: 14px; }
.hero-cta { width: 100%; max-width: 400px; font-size: clamp(15px, 2vw, 18px); padding: 18px 32px; }
.hero-disclaimer { margin-top: 16px; font-size: 13px; color: rgba(255,255,255,0.6); }

/* ============================================
   SECTION 3: WHY CHOOSE US
   ============================================ */
.why-us { background: white; }
.cards-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 20px; }
.trust-card {
  background: var(--white); border: 2px solid var(--light); border-radius: var(--radius);
  padding: 32px 20px; text-align: center; transition: all 0.4s; cursor: default;
}
.trust-card:hover { transform: scale(1.05) rotate(1deg); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.trust-card img { width: 80px; height: 80px; object-fit: contain; margin: 0 auto 18px; }
.trust-card h3 { font-size: 15px; font-weight: 800; color: var(--primary); margin-bottom: 10px; }
.trust-card p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

/* ============================================
   SECTION 4: WHAT IS BIO BRAIN
   ============================================ */
.what-inner { display: flex; align-items: center; gap: 60px; }
.what-text { flex: 1; }
.what-text h2 { font-family: 'Playfair Display', serif; font-size: clamp(26px, 4vw, 38px); color: var(--primary); margin-bottom: 20px; font-weight: 900; }
.what-text h2 span { color: var(--accent); }
.what-text p { color: var(--text); margin-bottom: 16px; font-size: 16px; }
.what-text .btn-primary { margin-top: 12px; }
.what-img { flex: 0 0 auto; max-width: 400px; }
.what-img img { border-radius: var(--radius); box-shadow: var(--shadow-lg); width: 100%; }

/* ============================================
   SECTION 5: HOW IT WORKS
   ============================================ */
.how-works { background: var(--gradient); }
.how-works .section-title { color: white; }
.how-works .section-sub { color: rgba(255,255,255,0.7); }
.accordion-wrap { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.accordion-item { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15); border-radius: var(--radius-sm); overflow: hidden; backdrop-filter: blur(10px); }
.how-works .accordion-item { color: white; }
.accordion-header {
  width: 100%; background: none; border: none; padding: 18px 22px; text-align: left;
  font-family: 'Nunito', sans-serif; font-size: clamp(14px, 1.8vw, 16px); font-weight: 700;
  cursor: pointer; display: flex; justify-content: space-between; align-items: center;
  min-height: 60px; gap: 10px; color: inherit; transition: background 0.3s;
}
.how-works .accordion-header { color: white; }
.accordion-header:hover { background: rgba(255,255,255,0.05); }
.acc-icon { width: 28px; height: 28px; border-radius: 50%; background: rgba(212,160,23,0.3); color: var(--accent2); display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 400; flex-shrink: 0; transition: transform 0.3s; }
.accordion-item.active .acc-icon { transform: rotate(45deg); }
.accordion-body { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
.accordion-body p { padding: 0 22px 18px; font-size: 15px; opacity: 0.85; line-height: 1.7; }
.accordion-item.active .accordion-body { max-height: 300px; }

/* FAQ uses different styles */
.faq-wrap { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-wrap .accordion-item { background: white; border: 2px solid var(--light); }
.faq-wrap .accordion-header { color: var(--primary); font-size: clamp(14px, 1.8vw, 16px); }
.faq-wrap .accordion-header:hover { background: var(--light); }
.faq-wrap .accordion-body p { color: var(--text); opacity: 1; }

/* Science accordion */
.science-accordion { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.science-accordion .accordion-item { background: white; border: 2px solid var(--light); }
.science-accordion .accordion-header { color: var(--primary); font-size: clamp(14px, 1.8vw, 16px); }
.science-accordion .accordion-header:hover { background: var(--light); }
.science-accordion .accordion-body p { color: var(--text); opacity: 1; }

/* ============================================
   SECTION 6: REVIEWS
   ============================================ */
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review-card {
  background: white; border-radius: var(--radius); padding: 30px 24px; text-align: center;
  box-shadow: var(--shadow); transition: transform 0.3s, box-shadow 0.3s;
}
.review-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.reviewer-img { width: 80px; height: 80px; border-radius: 50%; object-fit: cover; margin: 0 auto 16px; border: 3px solid var(--accent); }
.stars { color: #f59e0b; font-size: 20px; margin-bottom: 10px; }
.review-card h4 { font-size: 16px; color: var(--primary); margin-bottom: 4px; }
.review-card h4 span { font-weight: 400; color: var(--text-light); font-size: 13px; }
.review-card p { font-size: 14px; color: var(--text); line-height: 1.65; }
.rating-img-wrap { text-align: center; margin-top: 30px; }
.rating-img-wrap img { height: 40px; width: auto; margin: 0 auto; }

/* ============================================
   SECTION 7 & 13: PRICING
   ============================================ */
.pricing { background: var(--dark); }
.pricing .section-title { color: white; }
.pricing .section-sub { color: rgba(255,255,255,0.7); }
.countdown-wrap { text-align: center; margin-bottom: 40px; }
.countdown-label { color: rgba(255,255,255,0.7); font-size: 14px; font-weight: 600; margin-bottom: 12px; }
.countdown { display: inline-flex; align-items: center; gap: 8px; background: rgba(212,160,23,0.15); border: 2px solid var(--accent); border-radius: 12px; padding: 16px 28px; }
.time-block { text-align: center; }
.time-block span { font-family: 'Playfair Display', serif; font-size: clamp(32px, 6vw, 54px); font-weight: 900; color: var(--accent2); display: block; line-height: 1; }
.time-block small { font-size: 11px; color: rgba(255,255,255,0.6); font-weight: 700; letter-spacing: 1px; }
.colon { font-size: 40px; font-weight: 900; color: var(--accent2); line-height: 1; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.price-card {
  background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius); padding: 28px 20px; text-align: center; color: white;
  transition: all 0.3s; position: relative;
}
.price-card.popular {
  background: rgba(212,160,23,0.15); border: 2px solid var(--accent);
  transform: scale(1.04); box-shadow: 0 20px 60px rgba(212,160,23,0.25);
}
.price-card:hover { transform: scale(1.03); border-color: rgba(255,255,255,0.3); }
.price-card.popular:hover { transform: scale(1.07); }
.card-label { font-size: 11px; font-weight: 800; letter-spacing: 2px; text-transform: uppercase; color: var(--text-light); margin-bottom: 8px; }
.popular-label { color: var(--accent2) !important; }
.bottles-count { font-family: 'Playfair Display', serif; font-size: 22px; font-weight: 900; margin-bottom: 4px; }
.supply { font-size: 12px; color: rgba(255,255,255,0.55); margin-bottom: 16px; }
.price-card img:not(.payment-icons) { max-height: 160px; width: auto; margin: 0 auto 16px; }
.price-per { font-family: 'Playfair Display', serif; font-size: 28px; font-weight: 900; color: var(--accent2); }
.price-per small { font-size: 14px; font-family: 'Nunito', sans-serif; opacity: 0.7; }
.price-total { font-size: 14px; margin-bottom: 14px; color: rgba(255,255,255,0.8); }
.price-total del { opacity: 0.5; margin-right: 6px; }
.badge-row { display: flex; gap: 6px; flex-wrap: wrap; justify-content: center; margin-bottom: 14px; }
.badge-free { background: rgba(16,185,129,0.2); color: #34d399; border: 1px solid rgba(16,185,129,0.4); padding: 4px 10px; border-radius: 20px; font-size: 11px; font-weight: 700; }
.badge-ship { background: rgba(59,130,246,0.2); color: #93c5fd; border: 1px solid rgba(59,130,246,0.4); padding: 4px 10px; border-radius: 20px; font-size: 11px; font-weight: 700; }
.btn-cart { display: block; margin-bottom: 12px; transition: transform 0.3s; }
.btn-cart:hover { transform: scale(1.05); }
.btn-cart img { width: 100%; max-width: 200px; margin: 0 auto; height: auto; }
.payment-icons { width: 100%; max-width: 200px; margin: 0 auto; opacity: 0.7; }

/* ============================================
   SECTION 8: BONUSES
   ============================================ */
.bonus-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 20px; }
.bonus-card {
  background: white; border-radius: var(--radius); padding: 36px 28px; text-align: center;
  box-shadow: var(--shadow); transition: all 0.3s; position: relative; overflow: hidden;
}
.bonus-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--gradient-gold); }
.bonus-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.bonus-number { font-size: 11px; font-weight: 800; letter-spacing: 2px; text-transform: uppercase; color: var(--accent); margin-bottom: 16px; }
.bonus-card img { width: 100%; max-width: 200px; margin: 0 auto 20px; }
.bonus-card h3 { font-family: 'Playfair Display', serif; font-size: 20px; color: var(--primary); margin-bottom: 12px; }
.bonus-card p { font-size: 15px; color: var(--text); line-height: 1.65; }

/* ============================================
   SECTION 9: INGREDIENTS
   ============================================ */
.ingredients { background: white; }
.ingredients-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.ingredient-card {
  background: var(--light); border-radius: var(--radius-sm); padding: 24px 20px;
  border-left: 4px solid var(--accent); transition: all 0.3s;
}
.ingredient-card:hover { transform: translateX(4px); box-shadow: var(--shadow); background: white; }
.ingredient-card h3 { font-size: 15px; font-weight: 800; color: var(--primary); margin-bottom: 10px; }
.ingredient-card p { font-size: 14px; color: var(--text); line-height: 1.65; }

/* ============================================
   SECTION 10: SCIENCE
   ============================================ */
.science { background: var(--light); }

/* ============================================
   SECTION 11: GUARANTEE
   ============================================ */
.guarantee { background: white; }
.guarantee-inner { display: flex; align-items: center; gap: 60px; }
.guarantee-img { flex: 0 0 auto; max-width: 300px; }
.guarantee-img img { width: 100%; border-radius: 50%; box-shadow: var(--shadow-lg); }
.guarantee-text { flex: 1; }
.guarantee-text h2 { font-family: 'Playfair Display', serif; font-size: clamp(24px, 3.5vw, 34px); color: var(--primary); margin-bottom: 16px; font-weight: 900; }
.guarantee-text p { color: var(--text); margin-bottom: 24px; font-size: 16px; }
.guarantee-point { display: flex; gap: 16px; margin-bottom: 20px; }
.g-icon { width: 48px; height: 48px; background: var(--gradient); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; }
.guarantee-point h4 { font-size: 16px; color: var(--primary); font-weight: 800; margin-bottom: 6px; }
.guarantee-point p { font-size: 14px; color: var(--text); margin: 0; }
.guarantee-text .btn-primary { margin-top: 12px; }

/* ============================================
   SECTION 12: BENEFITS
   ============================================ */
.benefits { background: var(--light); }
.benefits-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.benefit-item {
  background: white; border-radius: var(--radius); padding: 28px 20px; text-align: center;
  box-shadow: 0 4px 16px rgba(15,42,110,0.07); transition: all 0.3s;
}
.benefit-item:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.benefit-icon { font-size: 40px; margin-bottom: 14px; }
.benefit-item h3 { font-size: 16px; font-weight: 800; color: var(--primary); margin-bottom: 10px; }
.benefit-item p { font-size: 14px; color: var(--text); line-height: 1.65; }

/* ============================================
   SECTION 15: FINAL CTA
   ============================================ */
.final-cta {
  background: linear-gradient(135deg, #0a1628 0%, #0f2a6e 100%);
  position: relative; overflow: hidden;
}
.final-cta-bg {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(212,160,23,0.15) 0%, transparent 60%);
}
.final-inner { display: flex; align-items: center; gap: 60px; position: relative; z-index: 1; }
.final-img { flex: 0 0 auto; max-width: 380px; }
.final-img img { width: 100%; animation: floatBottle 4s ease-in-out infinite; filter: drop-shadow(0 30px 60px rgba(0,0,0,0.4)); }
.final-text { flex: 1; color: white; }
.final-text h2 { font-family: 'Playfair Display', serif; font-size: clamp(28px, 4vw, 46px); font-weight: 900; margin-bottom: 10px; }
.final-text h3 { font-family: 'Playfair Display', serif; font-size: clamp(20px, 3vw, 30px); color: var(--accent2); font-weight: 700; margin-bottom: 20px; }
.final-text p { font-size: 16px; opacity: 0.9; margin-bottom: 24px; }
.final-price { display: flex; flex-direction: column; gap: 6px; margin-bottom: 28px; }
.price-old { font-size: 16px; color: rgba(255,255,255,0.55); }
.price-old del { font-size: 20px; }
.price-new { font-size: clamp(20px, 3vw, 28px); color: var(--accent2); font-weight: 800; }
.btn-final { max-width: 460px; width: 100%; font-size: clamp(15px, 2vw, 18px); padding: 20px 32px; }
.final-stars { height: 36px; width: auto; margin-top: 24px; }

/* ============================================
   FOOTER
   ============================================ */
.footer { background: var(--dark); color: rgba(255,255,255,0.7); padding-top: 60px; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-brand .brand { color: white; font-size: 26px; margin-bottom: 16px; display: block; }
.footer-brand p { font-size: 14px; line-height: 1.7; margin-bottom: 20px; }
.social-icons { display: flex; gap: 12px; }
.social-icons a { width: 40px; height: 40px; background: rgba(255,255,255,0.08); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.7); transition: all 0.3s; }
.social-icons a:hover { background: var(--accent); color: var(--dark); transform: translateY(-3px); }
.footer-links h4 { color: white; font-size: 15px; font-weight: 800; margin-bottom: 16px; }
.footer-links a { display: block; font-size: 13px; margin-bottom: 10px; color: rgba(255,255,255,0.6); transition: color 0.3s; }
.footer-links a:hover { color: var(--accent2); }
.footer-cta h4 { color: white; font-size: 15px; font-weight: 800; margin-bottom: 12px; }
.footer-cta p { font-size: 13px; margin-bottom: 16px; line-height: 1.6; }
.footer-disclaimer { padding: 30px 0; }
.footer-disclaimer p { font-size: 12px; line-height: 1.7; margin-bottom: 16px; }
.footer-legal-links { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 16px; }
.legal-link { font-size: 12px; color: rgba(255,255,255,0.6); transition: color 0.3s; }
.legal-link:hover { color: var(--accent2); }
.link-separator { color: rgba(255,255,255,0.3); }
.copyright { font-size: 12px; }
.copyright a { color: var(--accent2); }

/* ============================================
   SCROLL TO TOP
   ============================================ */
.scroll-top {
  position: fixed; bottom: 24px; right: 24px; width: 56px; height: 56px;
  background: var(--gradient); color: white; border: none; border-radius: 50%;
  font-size: 20px; cursor: pointer; z-index: 999; box-shadow: var(--shadow);
  transition: all 0.3s; opacity: 0; transform: translateY(20px);
  display: flex; align-items: center; justify-content: center;
}
.scroll-top.show { opacity: 1; transform: translateY(0); }
.scroll-top:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

/* ============================================
   NOTIFICATIONS
   ============================================ */
.notification-popup {
  position: fixed; bottom: 24px; left: 24px; z-index: 9999;
  background: white; border-radius: 12px; box-shadow: 0 8px 32px rgba(0,0,0,0.15);
  padding: 14px; max-width: 280px; transform: translateX(-320px); transition: transform 0.5s;
}
.notification-popup.show { transform: translateX(0); }
.notif-inner { display: flex; align-items: center; gap: 10px; }
.notif-inner img { width: 48px; height: 48px; object-fit: contain; border-radius: 8px; }
.notif-text { font-size: 13px; color: var(--text); line-height: 1.4; flex: 1; }
.notif-close { background: none; border: none; font-size: 18px; color: var(--text-light); cursor: pointer; padding: 4px; }

/* ============================================
   EXIT POPUP
   ============================================ */
.overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 9998; opacity: 0; pointer-events: none; transition: opacity 0.3s; }
.overlay.show { opacity: 1; pointer-events: all; }
.exit-popup {
  position: fixed; top: 50%; left: 50%; transform: translate(-50%, -60%);
  z-index: 9999; background: white; border-radius: var(--radius); padding: 36px 32px;
  max-width: 460px; width: 90%; text-align: center; opacity: 0; pointer-events: none;
  transition: all 0.4s; box-shadow: var(--shadow-lg);
}
.exit-popup.show { opacity: 1; pointer-events: all; transform: translate(-50%, -50%); }
.exit-close { position: absolute; top: 14px; right: 16px; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-light); }
.exit-popup h3 { font-family: 'Playfair Display', serif; font-size: 26px; color: var(--primary); margin-bottom: 10px; }
.exit-popup p { color: var(--text); margin-bottom: 20px; }
.exit-popup img { max-height: 160px; width: auto; margin: 0 auto 20px; }
.exit-popup .btn-primary { width: 100%; }
.exit-decline { display: block; margin-top: 12px; font-size: 12px; color: var(--text-light); text-decoration: underline; cursor: pointer; }
.exit-decline:hover { color: var(--primary); }

/* ============================================
   AOS (Animate on Scroll) - custom
   ============================================ */
[data-aos] { opacity: 0; transition: all 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="zoom-in"] { transform: scale(0.85); }
[data-aos="slide-up"] { transform: translateY(60px); }
[data-aos].aos-animate { opacity: 1; transform: none; }

/* ============================================
   MOBILE RESPONSIVE
   ============================================ */

/* Tablet */
@media (max-width: 1024px) {
  .cards-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .ingredients-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .benefits-grid { grid-template-columns: repeat(2, 1fr); }
  .final-inner, .what-inner, .guarantee-inner { flex-direction: column; gap: 30px; text-align: center; }
  .what-img, .final-img, .guarantee-img { max-width: 300px; margin: 0 auto; }
  .guarantee-point { text-align: left; }
  .hero-inner { flex-direction: column; text-align: center; }
  .hero-img-wrap { order: 1; }
  .hero-content { order: 2; }
  .hero-rating { justify-content: center; }
  .hero-cta { margin: 0 auto; }
  .float-badge { display: none; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 360px; margin: 0 auto; }
  .price-card.popular { transform: scale(1); }
  .bonus-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
}

/* Mobile */
@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: white; padding: 90px 24px 40px; z-index: 999; gap: 24px; transform: translateX(100%); transition: transform 0.35s ease; align-items: flex-start; }
  .nav-links.open { display: flex; transform: translateX(0); }
  .nav-links a { font-size: 20px; color: var(--primary); }
  .nav-links .btn-nav { width: 100%; justify-content: center; font-size: 16px; }
  .hamburger { display: flex; z-index: 1000; }
  .hero { padding: 110px 0 60px; }
  .section-pad { padding: 50px 0; }
  .cards-4 { grid-template-columns: 1fr; }
  .ingredients-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; text-align: center; }
  .social-icons { justify-content: center; }
  .footer-legal-links { justify-content: center; }
  .notification-popup { max-width: calc(100vw - 32px); left: 16px; bottom: 16px; }
  .exit-popup { padding: 28px 20px; }
}

@media (max-width: 480px) {
  .countdown { padding: 12px 20px; gap: 6px; }
  .colon { font-size: 28px; }
  .final-inner { text-align: center; }
  .btn-final { font-size: 15px; padding: 18px 24px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
}