/**
 * PrimeBoost Landing Page - Optimized CSS
 * Version: 2.2 - Fast Image Loading
 * Last Updated: January 20, 2026
 */

/*=============== GOOGLE FONTS - Optimized Loading ===============*/
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

/*=============== CSS CUSTOM PROPERTIES ===============*/
:root {
  /* Colors */
  --primary-500: #6366F1;
  --primary-600: #4F46E5;
  --primary-700: #4338CA;
  --secondary-400: #22D3EE;
  --secondary-500: #06B6D4;
  --accent-500: #10B981;
  --accent-600: #059669;
  --neutral-0: #FFFFFF;
  --neutral-50: #FAFAFA;
  --neutral-100: #F5F5F5;
  --neutral-200: #E5E5E5;
  --neutral-300: #D4D4D4;
  --neutral-400: #A3A3A3;
  --neutral-500: #737373;
  --neutral-600: #525252;
  --neutral-700: #404040;
  --neutral-800: #262626;
  --neutral-900: #171717;
  --error: #EF4444;
  --warning: #F59E0B;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
  --gradient-secondary: linear-gradient(135deg, #7C3AED 0%, #EC4899 100%);
  --gradient-accent: linear-gradient(135deg, #10B981 0%, #3B82F6 100%);
  --gradient-dark: linear-gradient(135deg, #1F2937 0%, #111827 100%);
  --gradient-light: linear-gradient(135deg, #F9FAFB 0%, #E5E7EB 100%);

  /* Typography */
  --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Border Radius */
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-Index */
  --z-dropdown: 1000;
  --z-fixed: 1030;
  --z-modal: 1050;
  --z-tooltip: 1070;

  /* Container */
  --container-max: 1320px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-secondary);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.6;
  color: var(--neutral-800);
  background-color: var(--neutral-0);
  overflow-x: hidden;
  min-height: 100vh;
}

/*=============== OPTIMIZED IMAGE LOADING ===============*/
img {
  display: block;
  max-width: 100%;
  height: auto;
  /* Prevent layout shift */
  aspect-ratio: attr(width) / attr(height);
  /* Better rendering */
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  /* Background for loading state */
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  /* Lazy loading placeholder animation */
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

img.loaded {
  animation: none;
  background: transparent;
}

/* Image fade-in on load */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
}

img[loading="lazy"].loaded {
  opacity: 1;
}

/* Prevent image flickering */
img:not([src]) {
  visibility: hidden;
}

/* WebP Support Detection */
.webp img[data-webp] {
  content: attr(data-webp);
}

/*=============== TYPOGRAPHY ===============*/
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 700;
  line-height: 1.2;
  color: var(--neutral-900);
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--text-3xl); font-weight: 800; }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); font-weight: 600; }

p {
  margin-bottom: var(--space-4);
  line-height: 1.625;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all var(--transition-base);
}

ul, ol { list-style: none; }

input, button, textarea, select {
  font: inherit;
  color: inherit;
  background: transparent;
  border: none;
  outline: none;
}

button {
  cursor: pointer;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/*=============== UTILITIES ===============*/
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
  position: relative;
}

.section__title {
  font-size: var(--text-3xl);
  font-weight: 800;
  text-align: center;
  margin-bottom: var(--space-12);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}

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

/*=============== BUTTONS ===============*/
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1;
  text-align: center;
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  min-height: 48px;
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--neutral-0);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-large {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-lg);
  min-height: 56px;
}

.btn svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/*=============== HEADER / NAVIGATION ===============*/
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: var(--z-fixed);
  transition: all var(--transition-base);
}

.header.scroll-header {
  padding: var(--space-2) 0;
  box-shadow: var(--shadow-lg);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav__logo {
  font-family: var(--font-primary);
  font-size: var(--text-2xl);
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  z-index: calc(var(--z-fixed) + 1);
}

.nav__menu {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 320px;
  height: 100vh;
  background: var(--gradient-dark);
  padding: var(--space-20) var(--space-8) var(--space-8);
  transition: right 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  z-index: var(--z-fixed);
  box-shadow: var(--shadow-2xl);
}

.nav__menu.show-menu {
  right: 0;
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.nav__link {
  color: var(--neutral-0);
  font-size: var(--text-lg);
  font-weight: 500;
  padding: var(--space-2) 0;
  position: relative;
  display: inline-block;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-base);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  color: var(--neutral-0);
  cursor: pointer;
  transition: all var(--transition-base);
}

.nav__close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav__cta {
  padding: var(--space-3) var(--space-6);
  background: var(--gradient-primary);
  color: var(--neutral-0);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--text-sm);
  box-shadow: var(--shadow-md);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav__cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.nav__toggle {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-600);
  cursor: pointer;
  z-index: calc(var(--z-fixed) + 1);
}

/*=============== HERO SECTION ===============*/
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 90px;
  background: linear-gradient(135deg, #EEF2FF 0%, #ECFEFF 100%);
  position: relative;
  overflow: hidden;
}

.hero__container {
  position: relative;
  z-index: 2;
}

.hero__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
}

.hero__image {
  order: -1;
}

.hero__image-wrapper {
  position: relative;
  animation: heroFloat 6s ease-in-out infinite;
}

@keyframes heroFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  25% { transform: translateY(-20px) rotate(2deg); }
  50% { transform: translateY(0) rotate(0deg); }
  75% { transform: translateY(-15px) rotate(-2deg); }
}

.hero__img {
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
  filter: drop-shadow(0 20px 40px rgba(79, 70, 229, 0.3));
  /* Image will load faster with these optimizations */
  will-change: transform;
}

.hero__glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 150%;
  height: 150%;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.2) 0%, transparent 70%);
  animation: glowPulse 4s ease-in-out infinite;
  pointer-events: none;
  z-index: -1;
}

@keyframes glowPulse {
  0%, 100% {
    opacity: 0.5;
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    opacity: 0.8;
    transform: translate(-50%, -50%) scale(1.1);
  }
}

.hero__text {
  text-align: center;
}

.hero__title {
  font-size: var(--text-3xl);
  line-height: 1.2;
  margin-bottom: var(--space-6);
}

.hero__description {
  font-size: var(--text-base);
  color: var(--neutral-600);
  margin-bottom: var(--space-4);
  line-height: 1.625;
}

.hero__description:last-of-type {
  margin-bottom: var(--space-8);
}

.hero__cta {
  width: 100%;
  max-width: 400px;
}

/* Hero Background Shapes */
.hero__bg-shapes {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: hidden;
  pointer-events: none;
}

.shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.08;
  filter: blur(40px);
  will-change: transform;
}

.shape-1 {
  width: 300px;
  height: 300px;
  background: var(--gradient-primary);
  top: 10%;
  left: 5%;
}

.shape-2 {
  width: 200px;
  height: 200px;
  background: var(--gradient-secondary);
  bottom: 15%;
  right: 10%;
}

.shape-3 {
  width: 150px;
  height: 150px;
  background: var(--gradient-accent);
  top: 50%;
  right: 5%;
}

/*=============== TRUST SECTION ===============*/
.trust {
  background: var(--neutral-0);
}

.trust__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.trust__card {
  background: var(--neutral-0);
  padding: var(--space-8);
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all var(--transition-base);
  border: 1px solid var(--neutral-100);
}

.trust__card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
  border-color: var(--primary-600);
}

.trust__card-icon {
  width: 100px;
  height: 100px;
  margin: 0 auto var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-light);
  border-radius: var(--radius-2xl);
  padding: var(--space-4);
}

.trust__icon {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.trust__card-title {
  font-size: var(--text-lg);
  color: var(--primary-600);
  margin-bottom: var(--space-3);
  font-weight: 700;
}

.trust__card-text {
  font-size: var(--text-sm);
  color: var(--neutral-600);
  line-height: 1.625;
  margin-bottom: 0;
}

/*=============== ABOUT SECTION ===============*/
.about {
  background: var(--gradient-light);
}

.about__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
}

.about__text {
  order: 2;
}

.about__paragraph {
  font-size: var(--text-base);
  color: var(--neutral-600);
  line-height: 1.625;
  margin-bottom: var(--space-6);
}

.about__image {
  order: 1;
}

.about__img {
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
}

/*=============== HOW IT WORKS SECTION ===============*/
.works {
  background: var(--neutral-0);
}

.works__accordion {
  max-width: 900px;
  margin: 0 auto;
}

.works__item {
  background: var(--neutral-0);
  border-radius: var(--radius-2xl);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border: 1px solid var(--neutral-100);
}

.works__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6);
  cursor: pointer;
  background: var(--gradient-light);
  min-height: 60px;
}

.works__title {
  font-size: var(--text-lg);
  color: var(--neutral-900);
  margin: 0;
  flex: 1;
  font-weight: 600;
}

.works__icon {
  color: var(--primary-600);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.works__item.active .works__icon {
  transform: rotate(180deg);
}

.works__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-in-out;
}

.works__item.active .works__content {
  max-height: 500px;
}

.works__text {
  padding: var(--space-6);
  font-size: var(--text-base);
  color: var(--neutral-600);
  line-height: 1.625;
  margin: 0;
  border-top: 1px solid var(--neutral-200);
}

/*=============== REVIEWS SECTION ===============*/
.reviews {
  background: var(--gradient-light);
}

.reviews__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.review__card {
  background: var(--neutral-0);
  padding: var(--space-8);
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--neutral-100);
}

.review__card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-2xl);
}

.review__header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.review__avatar {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 3px solid var(--primary-500);
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
}

.review__info {
  flex: 1;
}

.review__name {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--neutral-900);
  margin-bottom: var(--space-1);
}

.review__location {
  font-size: var(--text-sm);
  color: var(--neutral-500);
  margin: 0;
}

.review__rating {
  display: flex;
  gap: 4px;
  margin-bottom: var(--space-4);
}

.star {
  color: #FBBF24;
}

.review__text {
  font-size: var(--text-base);
  color: var(--neutral-600);
  line-height: 1.625;
  font-style: italic;
  margin: 0;
}

/*=============== PRICING SECTION ===============*/
.pricing {
  background: var(--neutral-0);
}

.pricing__subtitle {
  text-align: center;
  font-size: var(--text-lg);
  color: var(--neutral-600);
  margin-bottom: var(--space-8);
}

.countdown {
  max-width: 600px;
  margin: 0 auto var(--space-12);
  text-align: center;
}

.countdown__timer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  background: var(--gradient-primary);
  padding: var(--space-6);
  border-radius: var(--radius-3xl);
  box-shadow: var(--shadow-xl);
  margin-bottom: var(--space-4);
}

.countdown__item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.countdown__value {
  font-size: var(--text-4xl);
  font-weight: 900;
  color: var(--neutral-0);
  font-family: var(--font-primary);
  line-height: 1;
}

.countdown__label {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.9);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: var(--space-1);
  font-weight: 600;
}

.countdown__separator {
  font-size: var(--text-4xl);
  font-weight: 900;
  color: var(--neutral-0);
}

.countdown__text {
  font-size: var(--text-base);
  color: var(--error);
  font-weight: 600;
  margin: 0;
}

.pricing__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.pricing__card {
  background: var(--neutral-0);
  border-radius: var(--radius-3xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  border: 2px solid var(--neutral-100);
  transition: all var(--transition-base);
}

.pricing__card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2xl);
}

.pricing__card--popular {
  background: linear-gradient(135deg, #EEF2FF 0%, #ECFEFF 100%);
  border: 2px solid var(--primary-500);
}

.pricing__badge {
  display: inline-block;
  padding: var(--space-2) var(--space-4);
  background: var(--gradient-primary);
  color: var(--neutral-0);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.pricing__header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.pricing__package {
  font-size: var(--text-2xl);
  color: var(--primary-600);
  margin-bottom: var(--space-2);
  font-weight: 700;
}

.pricing__supply {
  font-size: var(--text-base);
  color: var(--neutral-600);
  margin: 0;
}

.pricing__image {
  text-align: center;
  margin-bottom: var(--space-6);
}

.pricing__img {
  max-width: 200px;
  margin: 0 auto;
}

.pricing__price {
  text-align: center;
  margin-bottom: var(--space-4);
}

.pricing__currency {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--primary-600);
  vertical-align: super;
}

.pricing__amount {
  font-size: var(--text-5xl);
  font-weight: 900;
  color: var(--primary-600);
  font-family: var(--font-primary);
}

.pricing__period {
  font-size: var(--text-base);
  color: var(--neutral-600);
}

.pricing__total {
  text-align: center;
  margin-bottom: var(--space-6);
}

.pricing__old {
  font-size: var(--text-xl);
  color: var(--neutral-400);
  text-decoration: line-through;
  margin-right: var(--space-2);
}

.pricing__new {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--error);
}

.pricing__bonuses {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.pricing__bonus {
  font-size: var(--text-sm);
  color: var(--accent-600);
  font-weight: 600;
  text-align: center;
}

.pricing__btn {
  width: 100%;
  margin-bottom: var(--space-4);
}

.pricing__payment {
  text-align: center;
}

.pricing__cards {
  max-width: 200px;
  margin: 0 auto;
}

.pricing__rating {
  text-align: center;
}

.pricing__stars {
  max-width: 200px;
  margin: 0 auto;
}

/*=============== INGREDIENTS SECTION ===============*/
.ingredients {
  background: var(--gradient-light);
}

.ingredients__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.ingredient__card {
  background: var(--neutral-0);
  padding: var(--space-6);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--primary-500);
  transition: all var(--transition-base);
}

.ingredient__card:hover {
  transform: translateX(8px);
  box-shadow: var(--shadow-xl);
}

.ingredient__name {
  font-size: var(--text-xl);
  color: var(--primary-600);
  margin-bottom: var(--space-3);
  font-weight: 700;
}

.ingredient__description {
  font-size: var(--text-base);
  color: var(--neutral-600);
  line-height: 1.625;
  margin-bottom: var(--space-3);
}

.ingredient__benefits {
  font-size: var(--text-base);
  color: var(--neutral-700);
  line-height: 1.625;
  margin: 0;
}

.ingredient__benefits strong {
  color: var(--accent-600);
}

/*=============== SCIENCE SECTION ===============*/
.science {
  background: var(--neutral-0);
}

.science__content {
  max-width: 900px;
  margin: 0 auto;
}

.science__item {
  background: var(--gradient-light);
  padding: var(--space-8);
  border-radius: var(--radius-2xl);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-100);
}

.science__subtitle {
  font-size: var(--text-xl);
  color: var(--primary-600);
  margin-bottom: var(--space-4);
  font-weight: 700;
}

.science__text {
  font-size: var(--text-base);
  color: var(--neutral-600);
  line-height: 1.625;
  margin: 0;
}

/*=============== GUARANTEE SECTION ===============*/
.guarantee {
  background: linear-gradient(135deg, #EEF2FF 0%, #F9FAFB 100%);
}

.guarantee__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
  align-items: center;
}

.guarantee__image {
  text-align: center;
  order: -1;
}

.guarantee__img {
  max-width: 300px;
  margin: 0 auto;
  animation: guaranteeSpin 20s linear infinite;
}

@keyframes guaranteeSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.guarantee__text {
  order: 2;
}

.guarantee__item {
  margin-bottom: var(--space-8);
}

.guarantee__subtitle {
  font-size: var(--text-xl);
  color: var(--primary-600);
  margin-bottom: var(--space-3);
  font-weight: 700;
}

.guarantee__description {
  font-size: var(--text-base);
  color: var(--neutral-600);
  line-height: 1.625;
  margin: 0;
}

/*=============== BENEFITS SECTION ===============*/
.benefits {
  background: var(--neutral-0);
}

.benefits__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

.benefit__item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-6);
  background: var(--gradient-light);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--neutral-100);
  transition: all var(--transition-base);
}

.benefit__item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.benefit__icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  color: var(--neutral-0);
}

.benefit__content {
  flex: 1;
}

.benefit__title {
  font-size: var(--text-lg);
  color: var(--neutral-900);
  margin-bottom: var(--space-2);
  font-weight: 600;
}

.benefit__text {
  font-size: var(--text-base);
  color: var(--neutral-600);
  line-height: 1.625;
  margin: 0;
}

/*=============== FAQ SECTION ===============*/
.faq {
  background: var(--gradient-light);
}

.faq__accordion {
  max-width: 900px;
  margin: 0 auto;
}

.faq__item {
  background: var(--neutral-0);
  border-radius: var(--radius-2xl);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  border: 1px solid var(--neutral-100);
}

.faq__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6);
  cursor: pointer;
  min-height: 60px;
}

.faq__question {
  font-size: var(--text-lg);
  color: var(--neutral-900);
  margin: 0;
  flex: 1;
  padding-right: var(--space-4);
  font-weight: 600;
}

.faq__icon {
  color: var(--primary-600);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.faq__item.active .faq__icon {
  transform: rotate(180deg);
}

.faq__content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease-in-out;
}

.faq__item.active .faq__content {
  max-height: 800px;
}

.faq__answer {
  padding: var(--space-6);
  font-size: var(--text-base);
  color: var(--neutral-600);
  line-height: 1.625;
  margin: 0;
  border-top: 1px solid var(--neutral-200);
}

/*=============== FINAL CTA SECTION ===============*/
.final-cta {
  background: var(--gradient-dark);
  position: relative;
  overflow: hidden;
  min-height: 600px;
  display: flex;
  align-items: center;
}

.final-cta__content {
  text-align: center;
  position: relative;
  z-index: 2;
}

.final-cta__image {
  position: relative;
  margin-bottom: var(--space-8);
}

.final-cta__img {
  max-width: 350px;
  margin: 0 auto;
  filter: drop-shadow(0 25px 50px rgba(79, 70, 229, 0.5));
  animation: finalFloat 4s ease-in-out infinite;
}

@keyframes finalFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

.final-cta__glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.4) 0%, transparent 60%);
  animation: finalGlow 3s ease-in-out infinite;
}

@keyframes finalGlow {
  0%, 100% {
    opacity: 0.6;
    transform: translate(-50%, -50%) scale(1);
  }
  50% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.2);
  }
}

.final-cta__title {
  font-size: var(--text-3xl);
  color: var(--neutral-0);
  margin-bottom: var(--space-8);
  line-height: 1.3;
  font-weight: 800;
}

.final-cta__pricing {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.final-cta__old-price {
  font-size: var(--text-xl);
  color: var(--neutral-400);
  text-decoration: line-through;
}

.final-cta__new-price {
  font-size: var(--text-4xl);
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: var(--font-primary);
}

.final-cta__btn {
  margin: 0 auto var(--space-6);
  max-width: 400px;
  width: 100%;
}

.final-cta__note {
  font-size: var(--text-sm);
  color: var(--neutral-400);
  margin: 0;
}

.final-cta__bg-animation {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--gradient-primary);
  border-radius: 50%;
  opacity: 0.3;
}

.particle-1 {
  top: 20%;
  left: 10%;
}

.particle-2 {
  top: 60%;
  right: 15%;
}

.particle-3 {
  bottom: 30%;
  left: 20%;
}

.particle-4 {
  top: 40%;
  right: 25%;
}

/*=============== FOOTER ===============*/
.footer {
  background: var(--gradient-dark);
  color: var(--neutral-0);
  padding: var(--space-16) 0 var(--space-6);
}

.footer__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer__column {
  text-align: center;
}

.footer__title {
  font-size: var(--text-lg);
  margin-bottom: var(--space-4);
  color: var(--neutral-0);
  font-weight: 700;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  color: var(--neutral-300);
  font-size: var(--text-base);
}

.footer__link:hover {
  color: var(--neutral-0);
}

.footer__social {
  display: flex;
  justify-content: center;
  gap: var(--space-4);
}

.footer__social-link {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  color: var(--neutral-0);
}

.footer__social-link:hover {
  background: var(--gradient-primary);
}

.footer__disclaimer {
  background: rgba(255, 255, 255, 0.05);
  padding: var(--space-6);
  border-radius: var(--radius-2xl);
  margin-bottom: var(--space-6);
}

.footer__disclaimer-text {
  font-size: var(--text-sm);
  color: var(--neutral-400);
  line-height: 1.625;
  text-align: center;
  margin: 0;
}

.footer__bottom {
  text-align: center;
  padding-top: var(--space-6);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__copyright {
  font-size: var(--text-sm);
  color: var(--neutral-400);
  margin: 0;
}

/*=============== SCROLL TO TOP BUTTON ===============*/
.scroll-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 56px;
  height: 56px;
  background: var(--gradient-primary);
  color: var(--neutral-0);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-xl);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: var(--z-tooltip);
}

.scroll-top.show-scroll {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  transform: translateY(-4px);
}

/*=============== NOTIFICATION POPUP ===============*/
.notification {
  position: fixed;
  bottom: var(--space-8);
  left: var(--space-8);
  background: var(--neutral-0);
  padding: var(--space-4);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  max-width: 320px;
  transform: translateX(-400px);
  transition: transform 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  z-index: var(--z-tooltip);
}

.notification.show {
  transform: translateX(0);
}

.notification__content {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
}

.notification__icon {
  width: 40px;
  height: 40px;
  min-width: 40px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-0);
}

.notification__text {
  flex: 1;
}

.notification__name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--neutral-900);
  margin-bottom: 2px;
}

.notification__message {
  font-size: var(--text-xs);
  color: var(--neutral-600);
  margin: 0;
}

.notification__close {
  width: 32px;
  height: 32px;
  min-width: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--neutral-400);
  cursor: pointer;
}

.notification__close:hover {
  color: var(--neutral-900);
}

/*=============== ANIMATIONS ===============*/
[data-animate] {
  opacity: 0;
}

[data-animate="fade-up"].animate {
  animation: fadeInUp 0.6s ease-out forwards;
}

[data-animate="slide-left"].animate {
  animation: slideInLeft 0.8s ease-out forwards;
}

[data-animate="slide-right"].animate {
  animation: slideInRight 0.8s ease-out forwards;
}

[data-animate="zoom-in"].animate {
  animation: zoomIn 0.8s ease-out forwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/*=============== MEDIA QUERIES ===============*/
@media screen and (max-width: 479px) {
  :root {
    --text-3xl: 1.5rem;
    --text-4xl: 1.875rem;
  }
  
  .countdown__value {
    font-size: var(--text-3xl);
  }
  
  .notification {
    left: var(--space-4);
    right: var(--space-4);
    bottom: var(--space-4);
    max-width: calc(100% - var(--space-8));
  }
}

@media screen and (min-width: 480px) {
  .hero__title,
  .section__title,
  .final-cta__title {
    font-size: var(--text-4xl);
  }
}

@media screen and (min-width: 576px) {
  .trust__grid,
  .reviews__grid,
  .pricing__grid,
  .benefits__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media screen and (min-width: 768px) {
  :root {
    --text-3xl: 2.25rem;
    --text-4xl: 3rem;
    --text-5xl: 3.75rem;
  }
  
  .container {
    padding-left: var(--space-12);
    padding-right: var(--space-12);
  }
  
  .nav__menu {
    position: static;
    width: auto;
    max-width: none;
    height: auto;
    background: transparent;
    padding: 0;
  }
  
  .nav__list {
    flex-direction: row;
    gap: var(--space-8);
  }
  
  .nav__link {
    color: var(--neutral-700);
    font-size: var(--text-base);
  }
  
  .nav__close,
  .nav__toggle {
    display: none;
  }
  
  .hero__content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-16);
  }
  
  .hero__image {
    order: 2;
  }
  
  .hero__text {
    text-align: left;
    order: 1;
  }
  
  .hero__cta {
    margin: 0;
    width: auto;
    max-width: none;
  }
  
  .about__content {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .about__text {
    order: 1;
  }
  
  .about__image {
    order: 2;
  }
  
  .guarantee__content {
    grid-template-columns: 1fr 2fr;
  }
  
  .guarantee__image {
    order: 1;
  }
  
  .guarantee__text {
    order: 2;
  }
  
  .footer__content {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer__column {
    text-align: left;
  }
  
  .footer__social {
    justify-content: flex-start;
  }
  
  .ingredients__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media screen and (min-width: 992px) {
  .trust__grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .reviews__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .pricing__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .hero__title {
    font-size: var(--text-5xl);
  }
}

@media screen and (min-width: 1200px) {
  .section {
    padding-top: var(--space-20);
    padding-bottom: var(--space-20);
  }
  
  .hero__img {
    max-width: 500px;
  }
  
  .final-cta__img {
    max-width: 400px;
  }
}

/*=============== REDUCED MOTION ===============*/
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/*=============== PRINT STYLES ===============*/
@media print {
  .header,
  .nav,
  .scroll-top,
  .notification,
  .hero__bg-shapes,
  .final-cta__bg-animation {
    display: none !important;
  }
}