/* =============================================
   TSTRIVE — PREMIUM LANDING PAGE STYLES
   Design: Modern Gradient + Glassmorphism
   Fonts: Montserrat (headings) + Open Sans (body)
   ============================================= */

/* ===== 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: #1a1a2e;
  background: #fff;
  overflow-x: hidden;
  line-height: 1.7;
}

input, select, textarea { font-size: 16px; }

img { max-width: 100%; height: auto; display: block; }

a { text-decoration: none; color: inherit; }

ul { list-style: none; }

/* ===== CSS VARIABLES ===== */
:root {
  --primary: #4F46E5;
  --primary-dark: #3730a3;
  --secondary: #06B6D4;
  --accent: #f59e0b;
  --gold: #D4AF37;
  --dark: #0f0e17;
  --dark2: #1a1a2e;
  --light: #f8f9ff;
  --white: #ffffff;
  --gray: #6b7280;
  --gradient: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
  --gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
  --shadow-sm: 0 2px 8px rgba(79,70,229,0.1);
  --shadow-md: 0 8px 30px rgba(79,70,229,0.15);
  --shadow-lg: 0 20px 60px rgba(79,70,229,0.2);
  --radius: 16px;
  --radius-sm: 8px;
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5 {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  line-height: 1.2;
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.section-pad { padding: 60px 0; }
.bg-light { background: var(--light); }
.mt-2 { margin-top: 20px; }

.section-title {
  font-size: clamp(24px, 5vw, 38px);
  text-align: center;
  margin-bottom: 12px;
  color: var(--dark2);
}

.section-sub {
  text-align: center;
  color: var(--gray);
  font-size: 17px;
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== BUTTONS ===== */
.btn-primary, .btn-hero, .btn-price, .btn-nav-cta, .btn-final, .btn-exit {
  display: inline-block;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-align: center;
  letter-spacing: 0.5px;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  padding: 14px 32px;
  font-size: 16px;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover { transform: scale(1.05); box-shadow: var(--shadow-lg); }

.btn-hero {
  background: var(--gradient-warm);
  color: #fff;
  padding: 18px 40px;
  font-size: 18px;
  box-shadow: 0 8px 30px rgba(245,158,11,0.4);
  display: block;
  width: 100%;
  min-height: 56px;
  margin-top: 24px;
  animation: pulse-btn 2s infinite;
}

@keyframes pulse-btn {
  0%, 100% { box-shadow: 0 8px 30px rgba(245,158,11,0.4); }
  50% { box-shadow: 0 8px 50px rgba(245,158,11,0.7); }
}

.btn-hero:hover { transform: scale(1.05); }
.btn-hero:active { transform: scale(0.98); }

.btn-price {
  background: var(--gradient);
  color: #fff;
  padding: 14px 28px;
  font-size: 16px;
  width: 100%;
  min-height: 50px;
  margin: 16px 0;
  box-shadow: var(--shadow-md);
}
.btn-price:hover { transform: scale(1.05); box-shadow: var(--shadow-lg); }
.btn-price:active { transform: scale(0.98); }

.btn-final {
  background: var(--gradient-warm);
  color: #fff;
  padding: 20px 48px;
  font-size: 20px;
  display: block;
  width: 100%;
  min-height: 60px;
  margin-top: 20px;
  animation: pulse-btn 2s infinite;
}
.btn-final:hover { transform: scale(1.05); }
.btn-final:active { transform: scale(0.98); }

.btn-exit {
  background: var(--gradient-warm);
  color: #fff;
  padding: 16px 36px;
  font-size: 17px;
  display: block;
  width: 100%;
  margin-top: 16px;
  min-height: 52px;
}
.btn-exit:hover { transform: scale(1.05); }

/* ===== AOS ANIMATION ===== */
[data-aos] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-aos].aos-animate {
  opacity: 1;
  transform: translateY(0);
}
[data-aos][data-delay="50"] { transition-delay: 50ms; }
[data-aos][data-delay="100"] { transition-delay: 100ms; }
[data-aos][data-delay="150"] { transition-delay: 150ms; }
[data-aos][data-delay="200"] { transition-delay: 200ms; }
[data-aos][data-delay="250"] { transition-delay: 250ms; }
[data-aos][data-delay="300"] { transition-delay: 300ms; }
[data-aos][data-delay="350"] { transition-delay: 350ms; }
[data-aos][data-delay="400"] { transition-delay: 400ms; }
[data-aos][data-delay="450"] { transition-delay: 450ms; }
[data-aos][data-delay="500"] { transition-delay: 500ms; }
[data-aos][data-delay="550"] { transition-delay: 550ms; }

[data-aos="fade-right"] { transform: translateX(-30px); }
[data-aos="fade-right"].aos-animate { transform: translateX(0); }
[data-aos="fade-left"] { transform: translateX(30px); }
[data-aos="fade-left"].aos-animate { transform: translateX(0); }
[data-aos="zoom-in"] { transform: scale(0.85); }
[data-aos="zoom-in"].aos-animate { transform: scale(1); }

@media (prefers-reduced-motion: reduce) {
  [data-aos] { opacity: 1; transform: none !important; transition: none !important; }
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(255,255,255,0.98);
  box-shadow: 0 4px 20px rgba(79,70,229,0.15);
  padding: 0;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: 22px;
  color: var(--primary);
}

.nav-logo img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: cover;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  font-size: 15px;
  color: var(--dark2);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover { color: var(--primary); }

.btn-nav-cta {
  background: var(--gradient);
  color: #fff;
  padding: 10px 22px;
  border-radius: 50px;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 14px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-nav-cta:hover { transform: scale(1.05); box-shadow: var(--shadow-md); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  min-height: 44px;
  min-width: 44px;
  justify-content: center;
  align-items: center;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark2);
  border-radius: 2px;
  transition: var(--transition);
}
.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); }

/* ===== HERO ===== */
.hero {
  position: relative;
  background: linear-gradient(135deg, #0f0e17 0%, #1a1a2e 50%, #16213e 100%);
  padding: 120px 0 80px;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}

.hero-image-wrap {
  flex: 0 0 auto;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-glow-ring {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,70,229,0.3) 0%, rgba(6,182,212,0.15) 50%, transparent 70%);
  animation: glow-pulse 3s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.1); opacity: 1; }
}

.hero-bottle {
  width: 280px;
  max-width: 90vw;
  position: relative;
  z-index: 2;
  animation: float-bottle 4s ease-in-out infinite;
  filter: drop-shadow(0 20px 60px rgba(79,70,229,0.5));
}

@keyframes float-bottle {
  0%, 100% { transform: translateY(0) rotate(-2deg); }
  50% { transform: translateY(-20px) rotate(2deg); }
}

.hero-badge-float {
  position: absolute;
  top: 0;
  right: -10px;
  background: var(--gradient-warm);
  color: #fff;
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: 13px;
  padding: 8px 14px;
  border-radius: 30px;
  z-index: 3;
  animation: badge-bounce 2s ease-in-out infinite;
  box-shadow: 0 4px 15px rgba(245,158,11,0.5);
}

@keyframes badge-bounce {
  0%, 100% { transform: translateY(0) rotate(-3deg); }
  50% { transform: translateY(-6px) rotate(3deg); }
}

.hero-content { flex: 1; color: #fff; }

.hero-tag {
  display: inline-block;
  background: rgba(79,70,229,0.3);
  border: 1px solid rgba(79,70,229,0.5);
  color: #a5b4fc;
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  font-size: 13px;
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
}

.hero-h1 {
  font-size: clamp(28px, 5vw, 52px);
  font-weight: 900;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 12px;
  line-height: 1.8;
}

.hero-stars {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  margin-bottom: 4px;
}
.hero-stars span { font-size: 15px; color: rgba(255,255,255,0.7); }

.hero-guarantee {
  margin-top: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}

.hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  z-index: 2;
}
.hero-wave svg { width: 100%; display: block; }

/* ===== WHY US ===== */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.why-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(79,70,229,0.08);
  transition: var(--transition);
}
.why-card:hover {
  transform: scale(1.05) rotate(1deg);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.why-icon {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin: 0 auto 16px;
}

.why-card h3 {
  font-family: 'Montserrat', sans-serif;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--dark2);
}
.why-card p { font-size: 14px; color: var(--gray); line-height: 1.6; }

/* ===== WHAT IS ===== */
.what-inner {
  display: flex;
  align-items: center;
  gap: 60px;
}

.what-image {
  flex: 0 0 auto;
  width: 400px;
  max-width: 100%;
}

.what-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  width: 100%;
}

.what-content { flex: 1; }
.what-content p { font-size: 16px; margin-bottom: 16px; color: #374151; line-height: 1.8; }

/* ===== HOW WORKS ===== */
.how-works { background: #fff; }
.accordion-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }

.acc-item {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid rgba(79,70,229,0.15);
}

.acc-header {
  width: 100%;
  background: #fff;
  border: none;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 16px;
  color: var(--dark2);
  text-align: left;
  gap: 12px;
  min-height: 56px;
  transition: var(--transition);
}
.acc-header:hover { background: var(--light); }
.acc-header.active { background: var(--gradient); color: #fff; }

.acc-icon {
  font-size: 20px;
  font-weight: 300;
  transition: var(--transition);
  flex-shrink: 0;
}
.acc-header.active .acc-icon { transform: rotate(45deg); }

.acc-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.acc-body.open { max-height: 400px; }
.acc-body p { padding: 16px 24px; font-size: 15px; color: #374151; line-height: 1.8; }

/* ===== REVIEWS ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.review-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(79,70,229,0.08);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

.review-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 16px;
  object-fit: cover;
  border: 3px solid var(--primary);
}

.stars { font-size: 20px; margin-bottom: 8px; }

.review-card h4 {
  font-family: 'Montserrat', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.review-card p { font-size: 14px; color: #374151; line-height: 1.7; }

/* ===== PRICING ===== */
.pricing { background: linear-gradient(135deg, #0f0e17 0%, #1a1a2e 100%); }
.pricing .section-title { color: #fff; }
.pricing .section-sub { color: rgba(255,255,255,0.7); }

.countdown-wrap {
  text-align: center;
  margin-bottom: 40px;
}

.countdown-label {
  color: rgba(255,255,255,0.8);
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  font-size: 16px;
  margin-bottom: 12px;
}

.countdown {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: rgba(79,70,229,0.2);
  border: 1px solid rgba(79,70,229,0.4);
  padding: 16px 32px;
  border-radius: 16px;
  backdrop-filter: blur(10px);
}

.cnt-box {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.cnt-box span {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: clamp(36px, 8vw, 56px);
  color: #fff;
  line-height: 1;
}

.cnt-box small {
  font-size: 11px;
  color: rgba(255,255,255,0.6);
  font-family: 'Montserrat', sans-serif;
  font-weight: 600;
  letter-spacing: 1px;
}

.cnt-sep {
  font-size: 40px;
  font-weight: 800;
  color: var(--secondary);
  animation: blink 1s step-end infinite;
}

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

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  align-items: start;
}

.price-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  backdrop-filter: blur(10px);
  transition: var(--transition);
  position: relative;
}
.price-card:hover { transform: translateY(-6px); border-color: var(--secondary); }

.price-card.popular {
  background: rgba(79,70,229,0.2);
  border: 2px solid var(--primary);
  transform: scale(1.03);
  box-shadow: 0 0 40px rgba(79,70,229,0.4);
}
.price-card.popular:hover { transform: scale(1.05) translateY(-6px); }

.popular-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-warm);
  color: #fff;
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: 12px;
  padding: 6px 20px;
  border-radius: 30px;
  white-space: nowrap;
  box-shadow: 0 4px 15px rgba(245,158,11,0.4);
}

.price-label {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--secondary);
  margin-bottom: 6px;
}

.price-qty {
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 20px;
  color: #fff;
  margin-bottom: 4px;
}

.price-supply {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 16px;
}

.price-img {
  width: 130px;
  height: 170px;
  object-fit: contain;
  margin: 0 auto 16px;
}

.free-badges { display: flex; flex-wrap: wrap; gap: 6px; justify-content: center; margin-bottom: 12px; }

.free-badge {
  background: rgba(16,185,129,0.2);
  border: 1px solid rgba(16,185,129,0.4);
  color: #34d399;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 20px;
}

.price-amount {
  font-family: 'Montserrat', sans-serif;
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.price-old { text-decoration: line-through; font-size: 18px; color: rgba(255,255,255,0.4); font-weight: 600; }
.price-new { font-size: 36px; font-weight: 900; color: #fff; }

.price-per { font-size: 13px; color: rgba(255,255,255,0.6); margin-bottom: 4px; }

.price-cards {
  max-width: 160px;
  margin: 0 auto;
  opacity: 0.7;
}

.rating-center {
  text-align: center;
  margin-top: 32px;
}
.rating-center img { max-width: 240px; margin: 0 auto; }

/* ===== BONUS ===== */
.bonus-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 28px; }

.bonus-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(79,70,229,0.1);
  transition: var(--transition);
}
.bonus-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.bonus-card img {
  width: 100px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  object-fit: cover;
}

.bonus-num {
  font-family: 'Montserrat', sans-serif;
  font-weight: 800;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 6px;
}

.bonus-info h3 {
  font-family: 'Montserrat', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--dark2);
  margin-bottom: 8px;
}
.bonus-info p { font-size: 14px; color: var(--gray); line-height: 1.6; }

/* ===== INGREDIENTS ===== */
.ing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
}

.ing-card {
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 24px;
  border: 1px solid rgba(79,70,229,0.1);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.ing-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary); }

.ing-icon { font-size: 32px; margin-bottom: 12px; }

.ing-card h3 {
  font-family: 'Montserrat', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}
.ing-card p { font-size: 14px; color: #374151; line-height: 1.7; }

/* ===== SCIENCE ===== */
.science-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }

.sci-block {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}
.sci-block:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.sci-block h3 {
  font-family: 'Montserrat', sans-serif;
  font-size: 17px;
  font-weight: 700;
  color: var(--dark2);
  margin-bottom: 12px;
}
.sci-block p { font-size: 14px; color: #374151; line-height: 1.8; }

/* ===== GUARANTEE ===== */
.guarantee { background: linear-gradient(135deg, #f8f9ff 0%, #eef2ff 100%); }

.guarantee-inner {
  display: flex;
  align-items: center;
  gap: 60px;
}

.guarantee-image {
  flex: 0 0 auto;
  width: 300px;
  max-width: 100%;
}
.guarantee-image img { width: 100%; }

.guarantee-content { flex: 1; }
.guarantee-content h2 {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 800;
  color: var(--dark2);
  margin-bottom: 12px;
}
.guarantee-intro { color: var(--gray); font-size: 16px; margin-bottom: 24px; }

.guarantee-points { display: flex; flex-direction: column; gap: 20px; margin-bottom: 8px; }

.g-point { display: flex; align-items: flex-start; gap: 16px; }

.g-icon {
  font-size: 28px;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: rgba(79,70,229,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.g-point h4 {
  font-family: 'Montserrat', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--dark2);
  margin-bottom: 6px;
}
.g-point p { font-size: 14px; color: var(--gray); line-height: 1.6; }

/* ===== BENEFITS ===== */
.benefits-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }

.benefit-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: #fff;
  border-radius: var(--radius-sm);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(79,70,229,0.08);
  transition: var(--transition);
}
.benefit-item:hover { transform: translateX(6px); border-color: var(--primary); box-shadow: var(--shadow-md); }

.b-icon {
  font-size: 28px;
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  background: rgba(79,70,229,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.benefit-item h4 {
  font-family: 'Montserrat', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--dark2);
  margin-bottom: 6px;
}
.benefit-item p { font-size: 14px; color: var(--gray); line-height: 1.6; }

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }

.faq-item {
  background: #fff;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(79,70,229,0.1);
}

.faq-header {
  width: 100%;
  background: none;
  border: none;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 16px;
  color: var(--dark2);
  text-align: left;
  gap: 12px;
  min-height: 56px;
  transition: var(--transition);
}
.faq-header:hover { background: var(--light); }
.faq-header.active { background: var(--gradient); color: #fff; }

.faq-icon { font-size: 20px; font-weight: 300; transition: var(--transition); flex-shrink: 0; }
.faq-header.active .faq-icon { transform: rotate(45deg); }

.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-body.open { max-height: 500px; }
.faq-body p { padding: 16px 24px; font-size: 15px; color: #374151; line-height: 1.8; }

/* ===== FINAL CTA ===== */
.final-cta {
  background: linear-gradient(135deg, #0f0e17 0%, #1a1a2e 50%, #16213e 100%);
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(79,70,229,0.2) 0%, transparent 70%);
}

.final-cta-inner {
  display: flex;
  align-items: center;
  gap: 60px;
  position: relative;
  z-index: 1;
}

.final-cta-img {
  flex: 0 0 auto;
  width: 300px;
  max-width: 100%;
}
.final-cta-img img {
  width: 100%;
  animation: float-bottle 4s ease-in-out infinite;
  filter: drop-shadow(0 20px 60px rgba(79,70,229,0.5));
}

.final-cta-content { flex: 1; color: #fff; }

.final-tag {
  display: inline-block;
  background: rgba(239,68,68,0.2);
  border: 1px solid rgba(239,68,68,0.4);
  color: #fca5a5;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 12px;
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 16px;
  letter-spacing: 1px;
  animation: pulse-btn 2s infinite;
}

.final-cta-content h2 {
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 900;
  color: #fff;
  margin-bottom: 12px;
  line-height: 1.2;
}

.final-cta-content p { font-size: 16px; color: rgba(255,255,255,0.8); margin-bottom: 16px; line-height: 1.8; }

.final-price-block {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.final-old { font-size: 18px; color: rgba(255,255,255,0.5); }
.final-old del { text-decoration: line-through; }
.final-new { font-size: 28px; color: #fff; font-family: 'Montserrat', sans-serif; }
.final-new strong { color: #fbbf24; font-size: 36px; }

.final-guarantee { font-size: 13px; color: rgba(255,255,255,0.6); margin-top: 12px; }

/* ===== FOOTER ===== */
.footer {
  background: #0a0a0f;
  color: rgba(255,255,255,0.7);
  padding: 60px 0 0;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand img {
  width: 48px;
  height: 48px;
  border-radius: 8px;
  object-fit: cover;
  margin-bottom: 12px;
}

.footer-brand h3 {
  font-family: 'Montserrat', sans-serif;
  font-size: 20px;
  color: #fff;
  margin-bottom: 10px;
}
.footer-brand p { font-size: 14px; line-height: 1.7; }

.footer-links-col h4, .footer-social-col h4 {
  font-family: 'Montserrat', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.footer-links-col { display: flex; flex-direction: column; gap: 8px; }
.footer-links-col a { font-size: 14px; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer-links-col a:hover { color: var(--secondary); }

.footer-legal-links { display: flex; flex-direction: column; gap: 8px; }
.footer-legal-links .legal-link { font-size: 14px; color: rgba(255,255,255,0.6); transition: var(--transition); }
.footer-legal-links .legal-link:hover { color: var(--secondary); }

.social-icons { display: flex; gap: 10px; flex-wrap: wrap; }
.social-icon {
  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: var(--transition);
  border: 1px solid rgba(255,255,255,0.1);
}
.social-icon:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }

.footer-disclaimer {
  padding: 24px 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.footer-disclaimer p {
  font-size: 12px;
  color: rgba(255,255,255,0.35);
  line-height: 1.7;
}

.footer-bottom {
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-bottom a { color: var(--secondary); transition: var(--transition); }
.footer-bottom a:hover { color: #fff; }

/* ===== SCROLL TO TOP ===== */
.scroll-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 56px;
  height: 56px;
  background: var(--gradient);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  z-index: 999;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.scroll-top.show { opacity: 1; pointer-events: all; }
.scroll-top:hover { transform: scale(1.1) translateY(-3px); box-shadow: var(--shadow-lg); }

/* ===== PURCHASE POPUP ===== */
.purchase-popup {
  position: fixed;
  bottom: 90px;
  left: 20px;
  background: #fff;
  border-radius: 12px;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
  z-index: 1001;
  max-width: 300px;
  transform: translateX(-120%);
  transition: transform 0.5s cubic-bezier(0.68,-0.55,0.265,1.55);
  border-left: 4px solid var(--primary);
}
.purchase-popup.show { transform: translateX(0); }

.pp-icon { font-size: 24px; }
.pp-text { flex: 1; }
.pp-text strong { display: block; font-family: 'Montserrat', sans-serif; font-size: 14px; color: var(--dark2); }
.pp-text span { font-size: 12px; color: var(--gray); }

.pp-close {
  background: none;
  border: none;
  font-size: 14px;
  color: var(--gray);
  cursor: pointer;
  padding: 4px;
  min-width: 24px;
  min-height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ===== EXIT POPUP ===== */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  backdrop-filter: blur(4px);
}
.overlay.show { opacity: 1; pointer-events: all; }

.exit-popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.85);
  background: #fff;
  border-radius: var(--radius);
  padding: 40px 32px;
  z-index: 2001;
  max-width: 480px;
  width: calc(100% - 40px);
  opacity: 0;
  pointer-events: none;
  transition: all 0.4s cubic-bezier(0.34,1.56,0.64,1);
  text-align: center;
  box-shadow: 0 30px 80px rgba(0,0,0,0.3);
}
.exit-popup.show { opacity: 1; pointer-events: all; transform: translate(-50%, -50%) scale(1); }

.exit-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--light);
  border: none;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.exit-close:hover { background: #fee2e2; }
.exit-close a { color: inherit; font-size: 14px; }

.exit-tag {
  display: inline-block;
  background: #fee2e2;
  color: #ef4444;
  font-family: 'Montserrat', sans-serif;
  font-weight: 700;
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 14px;
  letter-spacing: 1px;
}

.exit-popup-inner h3 {
  font-family: 'Montserrat', sans-serif;
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 800;
  color: var(--dark2);
  margin-bottom: 12px;
}
.exit-popup-inner p { font-size: 15px; color: var(--gray); margin-bottom: 8px; }

.exit-price {
  font-family: 'Montserrat', sans-serif;
  font-size: 22px;
  font-weight: 800;
  color: var(--dark2);
  margin-bottom: 4px;
}
.exit-price del { color: var(--gray); font-size: 18px; }
.exit-price strong { color: var(--primary); }

.exit-small { font-size: 12px; color: var(--gray); margin-top: 10px; }

/* Particles canvas */
#heroParticles canvas { position: absolute; inset: 0; }

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

/* Tablet: <= 1024px */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 28px; }
  .hero-bottle { width: 220px; }
  .what-inner { gap: 40px; }
  .what-image { width: 320px; }
}

/* Mobile: <= 768px */
@media (max-width: 768px) {
  /* Nav */
  .hamburger { display: flex; }
  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: 75%;
    max-width: 300px;
    height: 100vh;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 80px 28px 28px;
    gap: 20px;
    box-shadow: -10px 0 40px rgba(0,0,0,0.1);
    transition: right 0.35s cubic-bezier(0.4,0,0.2,1);
    z-index: 1100;
  }
  .nav-links.open { right: 0; }
  .nav-link { font-size: 17px; }
  .btn-nav-cta { width: 100%; text-align: center; justify-content: center; }

  /* Hero */
  .hero { padding: 90px 0 60px; min-height: auto; }
  .hero-inner { flex-direction: column; gap: 30px; text-align: center; }
  .hero-bottle { width: 180px; }
  .hero-glow-ring { width: 220px; height: 220px; }
  .hero-stars { justify-content: center; }

  /* What is */
  .what-inner { flex-direction: column; gap: 28px; }
  .what-image { width: 100%; }

  /* Guarantee */
  .guarantee-inner { flex-direction: column; gap: 28px; }
  .guarantee-image { width: 200px; margin: 0 auto; }

  /* Final CTA */
  .final-cta-inner { flex-direction: column; gap: 28px; text-align: center; }
  .final-cta-img { width: 220px; margin: 0 auto; }
  .final-price-block { justify-content: center; }

  /* Bonus */
  .bonus-card { flex-direction: column; align-items: center; text-align: center; }

  /* Footer */
  .footer-top { grid-template-columns: 1fr; gap: 28px; text-align: center; }
  .social-icons { justify-content: center; }
  .footer-legal-links { align-items: center; }
  .footer-links-col { align-items: center; }

  /* Purchase popup */
  .purchase-popup { bottom: 16px; left: 50%; transform: translateX(-160%); max-width: 90vw; }
  .purchase-popup.show { transform: translateX(-50%); }

  .section-pad { padding: 48px 0; }
}

/* Small: <= 576px */
@media (max-width: 576px) {
  .hero-h1 { font-size: 26px; }
  .pricing-grid { grid-template-columns: 1fr; }
  .price-card.popular { transform: none; }
  .why-grid { grid-template-columns: 1fr 1fr; }
  .ing-grid { grid-template-columns: 1fr; }
  .benefits-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .science-grid { grid-template-columns: 1fr; }
}

/* Very small: <= 400px */
@media (max-width: 400px) {
  .why-grid { grid-template-columns: 1fr; }
  .hero-h1 { font-size: 22px; }
  .btn-hero { font-size: 16px; padding: 16px 24px; }
  .nav-container { padding: 10px 16px; }
}