/* ===== GOOGLE FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ===== CSS VARIABLES ===== */
:root {
  /* Colors */
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary-color: #64748b;
  --accent-color: #f59e0b;
  --success-color: #10b981;
  --white-color: #ffffff;
  --light-gray: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --text-color: var(--gray-900);
  --text-light: var(--gray-600);
  
  /* Typography */
  --font-family: 'Inter', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  
  /* Font Weights */
  --font-light: 300;
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;
  
  /* Layout */
  --container-max-width: 1200px;
  --header-height: 80px;
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  --border-radius-xl: 1.5rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition: all 0.3s ease;
  --transition-fast: all 0.15s ease;
}

/* ===== BASE ===== */
* {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-normal);
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--white-color);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--spacing-4);
  color: var(--text-light);
}

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

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

ul {
  list-style: none;
}

/* ===== REUSABLE CSS CLASSES ===== */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.section {
  padding: var(--spacing-24) 0;
}

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-16);
}

.section__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-extrabold);
  color: var(--text-color);
  margin-bottom: var(--spacing-4);
}

.section__subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4) var(--spacing-8);
  border-radius: var(--border-radius-lg);
  font-weight: var(--font-semibold);
  font-size: var(--font-size-base);
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  text-decoration: none;
  min-height: 56px;
}

.btn--primary {
  background-color: var(--primary-color);
  color: var(--white-color);
  box-shadow: var(--shadow-lg);
}

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

.btn--outline {
  background-color: transparent;
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn--outline:hover {
  background-color: var(--primary-color);
  color: var(--white-color);
  transform: translateY(-2px);
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  transition: var(--transition);
}

.header.scroll-header {
  background-color: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.nav {
  height: var(--header-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__logo-text {
  font-size: var(--font-size-xl);
  font-weight: var(--font-extrabold);
  color: var(--primary-color);
}

.nav__logo-image {
  height: 40px;
  width: auto;
  max-width: 250px;
  object-fit: contain;
  transition: var(--transition);
}

.nav__logo-image:hover {
  transform: scale(1.05);
}

.nav__list {
  display: flex;
  gap: var(--spacing-8);
}

.nav__link {
  font-weight: var(--font-medium);
  color: var(--text-light);
  transition: var(--transition);
}

.nav__link:hover {
  color: var(--primary-color);
}

.nav__toggle,
.nav__close {
  display: none;
  flex-direction: column;
  cursor: pointer;
}

.nav__toggle span,
.nav__close span {
  width: 25px;
  height: 3px;
  background-color: var(--text-color);
  margin: 3px 0;
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  padding-top: calc(var(--header-height) + var(--spacing-16));
  background: linear-gradient(135deg, var(--light-gray) 0%, var(--white-color) 100%);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-16);
  align-items: center;
}

.hero__badge {
  display: inline-block;
  background-color: var(--success-color);
  color: var(--white-color);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--border-radius);
  font-size: var(--font-size-sm);
  font-weight: var(--font-semibold);
  margin-bottom: var(--spacing-6);
  animation: fadeInUp 0.8s ease-out;
}

.hero__title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-extrabold);
  line-height: 1.1;
  margin-bottom: var(--spacing-6);
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero__price {
  color: var(--primary-color);
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  font-weight: var(--font-semibold);
  color: var(--text-color);
  margin-bottom: var(--spacing-4);
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero__description {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-8);
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero__buttons {
  animation: fadeInUp 0.8s ease-out 0.8s both;
}

.hero__image {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInRight 1s ease-out 0.4s both;
}

.hero__pdf-image {
  max-width: 500px;
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
  transform: perspective(1000px) rotateY(-15deg);
  transition: var(--transition);
}

.hero__pdf-image:hover {
  transform: perspective(1000px) rotateY(0deg) scale(1.05);
}

/* ===== ABOUT ===== */
.about {
  background-color: var(--white-color);
}

.about__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-8);
}

.about__card {
  background-color: var(--light-gray);
  padding: var(--spacing-8);
  border-radius: var(--border-radius-xl);
  text-align: center;
  transition: var(--transition);
  border: 1px solid var(--gray-200);
}

.about__card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  background-color: var(--white-color);
}

.about__card-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-4);
}

.about__card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-bold);
  color: var(--text-color);
  margin-bottom: var(--spacing-4);
}

.about__card-description {
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== BOOKS ===== */
.books {
  background-color: var(--light-gray);
}

.books__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-4);
}

@media screen and (max-width: 1200px) {
  .books__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-6);
  }
}

@media screen and (max-width: 768px) {
  .books__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-4);
  }
  
  .book__image {
    height: 250px;
  }
}

@media screen and (max-width: 480px) {
  .books__grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
  
  .book__image {
    height: 280px;
  }
}

.book__card {
  background-color: var(--white-color);
  padding: var(--spacing-6);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.book__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

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

.book__number {
  width: 40px;
  height: 40px;
  background-color: var(--primary-color);
  color: var(--white-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-lg);
  font-weight: var(--font-bold);
  margin-bottom: var(--spacing-4);
}

.book__image {
  width: 100%;
  height: 200px;
  margin-bottom: var(--spacing-4);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}

.book__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: var(--transition);
}

.book__card:hover .book__image img {
  transform: scale(1.05);
}

.book__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-extrabold);
  color: var(--text-color);
  margin-bottom: var(--spacing-2);
}

.book__subtitle {
  font-size: var(--font-size-xs);
  font-weight: var(--font-semibold);
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-4);
}

.book__description {
  color: var(--text-light);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* ===== PERFECT FOR AND BONUS SECTION ===== */
.perfect-for-bonus {
  background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #2563eb 100%);
  padding: var(--spacing-20) 0;
}

.perfect-for-bonus-container {
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.perfect-for-item {
  max-width: 600px;
  margin: 0 auto;
  margin-bottom: var(--spacing-16);
}

.perfect-for-icon {
  width: 80px;
  height: 80px;
  background-color: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-6);
  font-size: 2.5rem;
}

.perfect-for-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-extrabold);
  color: var(--white-color);
  margin-bottom: var(--spacing-4);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.perfect-for-description {
  font-size: var(--font-size-lg);
  color: var(--white-color);
  margin-bottom: var(--spacing-8);
  line-height: 1.6;
}

.perfect-for-cta {
  background-color: var(--accent-color);
  color: var(--white-color);
  font-size: var(--font-size-lg);
  font-weight: var(--font-extrabold);
  padding: var(--spacing-4) var(--spacing-8);
  border-radius: var(--border-radius-lg);
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: var(--shadow-xl);
  transition: var(--transition);
}

.perfect-for-cta:hover {
  background-color: #d97706;
  transform: translateY(-2px);
  box-shadow: 0 20px 40px rgba(245, 158, 11, 0.4);
}

.bonus-header {
  margin-bottom: var(--spacing-12);
  text-align: center;
}

.bonus-main-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-extrabold);
  color: var(--white-color);
  margin-bottom: var(--spacing-4);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.bonus-highlight {
  color: var(--accent-color);
  font-style: italic;
}

.bonus-subtitle {
  font-size: var(--font-size-lg);
  color: var(--white-color);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

.bonus-grid {
  display: grid;
  grid-template-columns: repeat(3, 280px);
  grid-template-rows: auto auto;
  gap: var(--spacing-4);
  row-gap: var(--spacing-6);
  margin-bottom: var(--spacing-12);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  justify-items: center;
  justify-content: center;
}

.bonus-item:nth-child(4),
.bonus-item:nth-child(5) {
  grid-row: 2;
}

.bonus-item:nth-child(4) {
  grid-column: 1;
  justify-self: end;
}

.bonus-item:nth-child(5) {
  grid-column: 3;
  justify-self: start;
}

.bonus-item {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-6);
  transition: var(--transition);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  width: 100%;
  max-width: 320px;
}

.bonus-item:hover {
  transform: translateY(-8px);
  background-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.bonus-item img {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.bonus-value {
  margin-top: var(--spacing-12);
}

.bonus-value-text {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-extrabold);
  color: var(--white-color);
  margin-bottom: var(--spacing-2);
}

.bonus-price {
  color: var(--accent-color);
  font-size: var(--font-size-5xl);
}

.bonus-value-subtitle {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-bold);
  color: var(--white-color);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials-section {
  background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #2563eb 100%);
  color: var(--white-color);
  padding-top: var(--spacing-16);
}

.testimonials__hero {
  text-align: center;
  margin-bottom: var(--spacing-12);
}

.testimonials__main-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-extrabold);
  color: var(--white-color);
  margin-bottom: var(--spacing-2);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.testimonials__subtitle {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-extrabold);
  color: #fbbf24;
  margin-bottom: var(--spacing-6);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-style: italic;
}

.testimonials__description {
  font-size: var(--font-size-xl);
  color: var(--white-color);
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
}

.testimonials__description strong {
  color: #fbbf24;
  font-weight: var(--font-bold);
}

.testimonials__stats {
  text-align: center;
  margin-top: var(--spacing-12);
}

.testimonials__avatars {
  margin-bottom: var(--spacing-8);
}

.avatar-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
}

.avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  border: 3px solid var(--white-color);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.avatar:nth-child(1) { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.avatar:nth-child(2) { background: linear-gradient(135deg, #10b981, #059669); }
.avatar:nth-child(3) { background: linear-gradient(135deg, #f59e0b, #d97706); }
.avatar:nth-child(4) { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.avatar:nth-child(5) { background: linear-gradient(135deg, #ef4444, #dc2626); }

.avatar-count {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-extrabold);
  color: var(--white-color);
  margin-left: var(--spacing-4);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.testimonials__final-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-extrabold);
  color: var(--white-color);
  margin-bottom: var(--spacing-8);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.testimonials__cta {
  background-color: var(--accent-color);
  color: var(--white-color);
  font-size: var(--font-size-xl);
  font-weight: var(--font-extrabold);
  padding: var(--spacing-6) var(--spacing-12);
  border-radius: var(--border-radius-lg);
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: var(--shadow-xl);
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
}

.testimonials__cta:hover {
  background-color: #d97706;
  transform: translateY(-2px);
  box-shadow: 0 20px 40px rgba(245, 158, 11, 0.4);
}

.btn--large {
  padding: var(--spacing-6) var(--spacing-12);
  font-size: var(--font-size-xl);
}

.testimonials__carousel {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  overflow: hidden;
}

.testimonials__wrapper {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  width: 500%;
  height: auto;
}

.testimonial__slide {
  min-width: 20%;
  width: 20%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.testimonial__slide.active {
  opacity: 1;
}

.testimonial__slide img {
  max-width: 100%;
  max-height: 600px;
  width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  transition: transform 0.3s ease;
}

.testimonial__slide:hover img {
  transform: none;
}

.testimonial__image {
  flex-shrink: 0;
  width: 300px;
  height: 500px;
  border-radius: var(--border-radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.testimonial__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* Testimonial images rounded corners for all devices */
.testimonial__slide img {
  border-radius: var(--border-radius-lg);
}

/* Carousel Dots */
.carousel__dots {
  display: flex;
  justify-content: center;
  gap: var(--spacing-2);
  margin-top: var(--spacing-6);
  padding: var(--spacing-6);
}

.carousel__dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: none;
  background-color: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: var(--transition);
}

.carousel__dot.active,
.carousel__dot:hover {
  background-color: var(--white-color);
  transform: scale(1.2);
}

/* ===== PRICING ===== */
.pricing {
  background-color: var(--light-gray);
}

.guarantee__badge {
  background-color: var(--success-color);
  color: var(--white-color);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: var(--border-radius-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--spacing-8);
  display: inline-block;
}

.pricing__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-8);
  max-width: 900px;
  margin: 0 auto;
}

.pricing__card {
  background-color: var(--white-color);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-8);
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  border: 2px solid transparent;
}

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

.pricing__card--featured {
  border-color: var(--primary-color);
  transform: scale(1.05);
}

.pricing__card--featured:hover {
  transform: scale(1.05) translateY(-8px);
}

.pricing__badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent-color);
  color: var(--white-color);
  padding: var(--spacing-2) var(--spacing-6);
  border-radius: var(--border-radius-lg);
  font-weight: var(--font-bold);
  font-size: var(--font-size-sm);
}

.pricing__header {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

.pricing__title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-extrabold);
  color: var(--text-color);
  margin-bottom: var(--spacing-2);
}

.pricing__subtitle {
  color: var(--text-light);
  font-size: var(--font-size-sm);
  margin-bottom: var(--spacing-6);
}

.pricing__price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--spacing-1);
}

.pricing__old-price {
  font-size: var(--font-size-lg);
  color: var(--gray-400);
  text-decoration: line-through;
  margin-right: var(--spacing-2);
}

.pricing__currency {
  font-size: var(--font-size-xl);
  font-weight: var(--font-bold);
  color: var(--primary-color);
}

.pricing__amount {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-extrabold);
  color: var(--primary-color);
}

.pricing__features {
  margin-bottom: var(--spacing-8);
}

.pricing__features li {
  padding: var(--spacing-3) 0;
  border-bottom: 1px solid var(--gray-200);
  color: var(--text-light);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-2);
}

.pricing__features li:last-child {
  border-bottom: none;
}

/* ===== FAQ ===== */
.faq {
  background-color: var(--white-color);
}

.faq__content {
  max-width: 800px;
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: var(--spacing-4);
}

.faq__question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-6) 0;
  cursor: pointer;
  transition: var(--transition);
}

.faq__question:hover {
  color: var(--primary-color);
}

.faq__question h3 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-semibold);
  margin: 0;
}

.faq__icon {
  font-size: var(--font-size-xl);
  font-weight: var(--font-bold);
  color: var(--primary-color);
  transition: var(--transition);
}

.faq__item.active .faq__icon {
  transform: rotate(45deg);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq__item.active .faq__answer {
  max-height: 200px;
  padding-bottom: var(--spacing-6);
}

.faq__answer p {
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--gray-900);
  color: var(--white-color);
  padding: var(--spacing-16) 0 var(--spacing-8);
}

.footer__content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-12);
}

.footer__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-extrabold);
  color: var(--white-color);
  margin-bottom: var(--spacing-4);
}

.footer__subtitle {
  font-size: var(--font-size-lg);
  font-weight: var(--font-semibold);
  color: var(--white-color);
  margin-bottom: var(--spacing-4);
}

.footer__description,
.footer__institute {
  color: var(--gray-300);
  line-height: 1.6;
}

.footer__list li {
  margin-bottom: var(--spacing-2);
  color: var(--gray-300);
}

.footer__list a {
  color: var(--gray-300);
  transition: var(--transition);
}

.footer__list a:hover {
  color: var(--white-color);
}

.footer__bottom {
  border-top: 1px solid var(--gray-700);
  padding-top: var(--spacing-8);
  text-align: center;
  color: var(--gray-400);
}

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

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

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== RESPONSIVE DESIGN ===== */
@media screen and (max-width: 1024px) {
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero__image {
    order: -1;
    margin-bottom: var(--spacing-8);
  }
  
  .hero__pdf-image {
    max-width: 400px;
  }
}

/* Mobile adjustments */
@media screen and (max-width: 768px) {
  .bonus-grid {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(5, auto);
    gap: var(--spacing-6);
    max-width: 100%;
    padding: 0;
  }
  
  .bonus-item:nth-child(4),
  .bonus-item:nth-child(5) {
    grid-column: 1;
    grid-row: auto;
    justify-self: stretch;
  }
  
  .bonus-item {
    width: 100%;
    max-width: none;
    margin: 0 auto;
    padding: var(--spacing-2);
    min-height: 450px;
    border-radius: 0;
  }

  .bonus-item img {
    width: 100%;
    height: auto;
    max-height: 80vh;
    object-fit: cover;
    border-radius: 0;
  }

  .testimonials__main-title,
  .testimonials__subtitle {
    font-size: var(--font-size-2xl);
  }
  
  .testimonials__description {
    font-size: var(--font-size-lg);
  }
  
  .testimonials__final-title {
    font-size: var(--font-size-xl);
  }
  
  .avatar {
    width: 40px;
    height: 40px;
  }
  
  .avatar-count {
    font-size: var(--font-size-lg);
  }
  
  .testimonials__cta {
    font-size: var(--font-size-lg);
    padding: var(--spacing-4) var(--spacing-8);
  }

  .perfect-for-title {
    font-size: var(--font-size-xl);
  }
  
  .perfect-for-description {
    font-size: var(--font-size-base);
  }
  
  .bonus-main-title {
    font-size: var(--font-size-2xl);
  }
  
  .bonus-subtitle {
    font-size: var(--font-size-base);
  }
  
  .bonus-grid {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(5, auto);
    gap: var(--spacing-8);
    padding: 0;
  }
  
  .bonus-item {
    width: 100%;
    max-width: none;
    padding: var(--spacing-1);
    min-height: 500px;
    border-radius: 0;
  }

  .bonus-item img {
    width: 100%;
    height: auto;
    max-height: 85vh;
    object-fit: cover;
    border-radius: 0;
  }
  
  .bonus-value-text {
    font-size: var(--font-size-3xl);
  }
  
  .bonus-price {
    font-size: var(--font-size-4xl);
  }
  
  .bonus-value-subtitle {
    font-size: var(--font-size-2xl);
  }
}

/* ===== CREATOR SECTION ===== */
.creator-section {
  background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #2563eb 100%);
  padding: var(--spacing-16) 0;
  margin-top: var(--spacing-12);
}

.creator-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.creator-content {
  text-align: center;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-12);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.creator-header {
  margin-bottom: var(--spacing-8);
}

.creator-main-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-extrabold);
  color: var(--white-color);
  margin-bottom: var(--spacing-2);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.creator-subtitle {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-extrabold);
  color: #fbbf24;
  margin-bottom: var(--spacing-6);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-style: italic;
}

.creator-image {
  margin: var(--spacing-8) 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

.creator-image img {
  max-width: 100%;
  height: auto;
  max-height: 400px;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  transition: var(--transition);
}

.creator-image img:hover {
  transform: scale(1.02);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
}

.creator-institute-name {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-extrabold);
  color: var(--accent-color);
  margin-bottom: var(--spacing-6);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.creator-description {
  font-size: var(--font-size-lg);
  color: var(--white-color);
  line-height: 1.6;
  margin-bottom: var(--spacing-6);
  text-align: left;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.creator-description:last-child {
  margin-bottom: 0;
}

/* Creator Responsive */
@media screen and (max-width: 768px) {
  .creator-content {
    padding: var(--spacing-8);
  }
  
  .creator-main-title {
    font-size: var(--font-size-2xl);
  }
  
  .creator-subtitle {
    font-size: var(--font-size-2xl);
  }
  
  .creator-institute-name {
    font-size: var(--font-size-xl);
  }
  
  .creator-description {
    font-size: var(--font-size-base);
    text-align: center;
  }
}

@media screen and (max-width: 480px) {
  .creator-section {
    padding: var(--spacing-12) 0;
  }
  
  .creator-content {
    padding: var(--spacing-6);
  }
  
  .creator-main-title {
    font-size: var(--font-size-xl);
  }
  
  .creator-subtitle {
    font-size: var(--font-size-xl);
  }
  
  .creator-institute-name {
    font-size: var(--font-size-lg);
  }
}

/* ===== MATERIALS CAROUSEL SECTION ===== */
.materials-carousel {
  position: relative;
  max-width: 900px;
  margin: var(--spacing-12) auto var(--spacing-16);
  overflow: hidden;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
}

.materials-carousel-wrapper {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  width: 300%;
  height: auto;
}

.materials-carousel-slide {
  min-width: 33.333%;
  width: 33.333%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.materials-carousel-slide.active {
  opacity: 1;
}

.materials-carousel-slide img {
  width: 100%;
  height: auto;
  max-height: 600px;
  object-fit: contain;
  display: block;
  border-radius: 2rem;
  transition: transform 0.3s ease;
}

.materials-carousel-slide:hover img {
  transform: scale(1.02);
}

/* Materials Carousel Dots */
.materials-carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--spacing-3);
  margin-top: var(--spacing-8);
  padding: var(--spacing-6);
}

.materials-carousel-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: none;
  background-color: var(--gray-300);
  cursor: pointer;
  transition: var(--transition);
}

.materials-carousel-dot.active,
.materials-carousel-dot:hover {
  background-color: var(--primary-color);
  transform: scale(1.3);
}

/* Materials Carousel Responsive */
@media screen and (max-width: 768px) {
  .materials-carousel {
    max-width: 100%;
    margin: var(--spacing-8) 0 var(--spacing-12);
    border-radius: var(--border-radius-lg);
  }
  
  .materials-carousel-slide img {
    max-height: 70vh;
    border-radius: 1.5rem;
  }
  
  .materials-carousel-dot {
    width: 16px;
    height: 16px;
  }
}

@media screen and (max-width: 480px) {
  .materials-carousel {
    margin: var(--spacing-6) 0 var(--spacing-8);
    border-radius: var(--border-radius);
  }
  
  .materials-carousel-slide img {
    max-height: 80vh;
    border-radius: 1rem;
  }
  
  .materials-carousel-dots {
    gap: var(--spacing-2);
    margin-top: var(--spacing-6);
  }
}

/* ===== BOOKS CAROUSEL SECTION ===== */
.books-carousel-section {
  background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #2563eb 100%);
  padding: var(--spacing-16) 0;
  margin-top: var(--spacing-12);
}

.books-carousel-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.books-carousel-header {
  text-align: center;
  margin-bottom: var(--spacing-12);
}

.books-carousel-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-extrabold);
  color: var(--white-color);
  margin-bottom: var(--spacing-4);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.books-carousel-subtitle {
  font-size: var(--font-size-lg);
  color: var(--white-color);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
}

.books-carousel {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  overflow: hidden;
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
}

.books-carousel-wrapper {
  display: flex;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  width: 300%;
  height: auto;
}

.books-carousel-slide {
  min-width: 33.333%;
  width: 33.333%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-shrink: 0;
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

.books-carousel-slide.active {
  opacity: 1;
}

.books-carousel-slide img {
  width: 100%;
  height: auto;
  max-height: 600px;
  object-fit: contain;
  display: block;
  border-radius: var(--border-radius-lg);
  transition: transform 0.3s ease;
}

.books-carousel-slide:hover img {
  transform: scale(1.02);
}

/* Books Carousel Dots */
.books-carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--spacing-3);
  margin-top: var(--spacing-8);
  padding: var(--spacing-6);
}

.books-carousel-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  border: none;
  background-color: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: var(--transition);
}

.books-carousel-dot.active,
.books-carousel-dot:hover {
  background-color: var(--white-color);
  transform: scale(1.3);
}

/* Books Carousel Responsive */
@media screen and (max-width: 768px) {
  .books-carousel-title {
    font-size: var(--font-size-2xl);
  }
  
  .books-carousel-subtitle {
    font-size: var(--font-size-base);
  }
  
  .books-carousel {
    max-width: 100%;
    margin: 0;
    border-radius: 0;
  }
  
  .books-carousel-slide img {
    max-height: 70vh;
    border-radius: 0;
  }
  
  .books-carousel-dot {
    width: 16px;
    height: 16px;
  }
}

@media screen and (max-width: 480px) {
  .books-carousel-section {
    padding: var(--spacing-12) 0;
  }
  
  .books-carousel-title {
    font-size: var(--font-size-xl);
  }
  
  .books-carousel-slide img {
    max-height: 80vh;
  }
  
  .books-carousel-dots {
    gap: var(--spacing-2);
    margin-top: var(--spacing-6);
  }
}

/* ===== GUARANTEE SECTION ===== */
.guarantee-section {
  background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 50%, #2563eb 100%);
  padding: var(--spacing-16) 0;
  margin-top: var(--spacing-12);
}

.guarantee-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.guarantee-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-12);
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-xl);
  padding: var(--spacing-12);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.guarantee-badge {
  flex-shrink: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

.guarantee-badge-image {
  width: 120px;
  height: 120px;
  display: block;
  margin: 0 auto;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.3));
  animation: float 3s ease-in-out infinite;
}

.guarantee-text {
  flex: 1;
  color: var(--white-color);
}

.guarantee-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-extrabold);
  color: var(--white-color);
  margin-bottom: var(--spacing-6);
  line-height: 1.2;
  text-transform: uppercase;
}

.guarantee-highlight {
  color: var(--accent-color);
  font-style: italic;
  font-size: var(--font-size-4xl);
}

.guarantee-description {
  font-size: var(--font-size-xl);
  font-weight: var(--font-semibold);
  color: var(--white-color);
  margin-bottom: var(--spacing-6);
  line-height: 1.4;
}

.guarantee-details {
  font-size: var(--font-size-lg);
  color: var(--white-color);
  line-height: 1.6;
  opacity: 0.95;
}

.guarantee-details strong {
  color: var(--accent-color);
  font-weight: var(--font-bold);
}

/* Guarantee Responsive */
@media screen and (max-width: 768px) {
  .guarantee-content {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-8);
    padding: var(--spacing-8);
  }
  
  .guarantee-badge-image {
    width: 100px;
    height: 100px;
  }
  
  .guarantee-title {
    font-size: var(--font-size-2xl);
  }
  
  .guarantee-highlight {
    font-size: var(--font-size-3xl);
  }
  
  .guarantee-description {
    font-size: var(--font-size-lg);
  }
  
  .guarantee-details {
    font-size: var(--font-size-base);
  }
}

@media screen and (max-width: 480px) {
  .guarantee-section {
    padding: var(--spacing-12) 0;
  }
  
  .guarantee-content {
    padding: var(--spacing-6);
  }
  
  .guarantee-badge-image {
    width: 80px;
    height: 80px;
  }
  
  .guarantee-title {
    font-size: var(--font-size-xl);
  }
  
  .guarantee-highlight {
    font-size: var(--font-size-2xl);
  }

  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: var(--white-color);
    padding: var(--spacing-16) var(--spacing-4);
    transition: var(--transition);
    z-index: 1000;
  }
  
  .nav__menu.show-menu {
    right: 0;
  }
  
  .nav__list {
    flex-direction: column;
    gap: var(--spacing-6);
    text-align: center;
  }
  
  .nav__link {
    font-size: var(--font-size-lg);
  }
  
  .nav__toggle,
  .nav__close {
    display: flex;
  }
  
  .nav__close {
    position: absolute;
    top: var(--spacing-4);
    right: var(--spacing-4);
  }
  
  .hero__title {
    font-size: var(--font-size-4xl);
  }
  
  .section__title {
    font-size: var(--font-size-3xl);
  }
  
  .pricing__grid {
    grid-template-columns: 1fr;
  }
  
  .pricing__card--featured {
    transform: none;
  }
  
  .pricing__card--featured:hover {
    transform: translateY(-8px);
  }
  
  /* Testimonials Mobile */
  .testimonial__slide {
    flex-direction: column;
    text-align: center;
    padding: var(--spacing-4);
  }
  
  .testimonial__slide img {
    max-width: 85%;
  }
  
  .testimonial__image {
    width: 250px;
    height: 400px;
    margin: 0 auto var(--spacing-6);
  }
  
  .testimonial__content {
    padding-left: 0;
  }
  
  .carousel__btn {
    width: 40px;
    height: 40px;
    font-size: var(--font-size-xl);
  }
  
  .carousel__btn--prev {
    left: var(--spacing-2);
  }
  
  .carousel__btn--next {
    right: var(--spacing-2);
  }
}

@media screen and (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-3);
  }
  
  .section {
    padding: var(--spacing-16) 0;
  }
  
  .hero__title {
    font-size: var(--font-size-3xl);
  }
  
  .section__title {
    font-size: var(--font-size-2xl);
  }
  
  .btn {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-sm);
  }
  
  .about__grid,
  .books__grid,
  .testimonials__carousel {
    grid-template-columns: 1fr;
  }
  
  .hero__pdf-image {
    max-width: 350px;
  }
  
  .testimonials__carousel {
    max-width: 100%;
  }
  
  .testimonial__slide {
    padding: var(--spacing-2);
  }
  
  .testimonial__slide img {
    max-width: 90%;
  }
}