/* ===== CSS Variables ===== */
:root {
  /* Colors */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #ec4899;
  --accent: #14b8a6;
  --dark: #0f172a;
  --dark-light: #1e293b;
  --gray: #64748b;
  --gray-light: #cbd5e1;
  --white: #ffffff;
  --success: #10b981;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Typography */
  --font-primary: 'Poppins', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --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);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* 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);
}

/* ===== Reset & Base ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-primary);
  background: var(--dark);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-md) 0;
  transition: var(--transition-base);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.highlight {
  color: var(--secondary);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-menu a {
  color: var(--gray-light);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition-fast);
  position: relative;
}

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

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-base);
}

.nav-menu a:hover::after {
  width: 100%;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: var(--white);
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

/* ===== Hero Section ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--spacing-3xl) 0;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-dark);
  z-index: -1;
}

.hero-bg::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 20s ease-in-out infinite;
}

.hero-bg::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(236, 72, 153, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  animation: float 15s ease-in-out infinite reverse;
}

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

.badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.6s ease-out;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

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

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--gray-light);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  animation: fadeInUp 0.6s ease-out 0.6s both;
}

.btn-hero {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--gradient-primary);
  color: var(--white);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.125rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  transition: var(--transition-base);
  width: fit-content;
}

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

.btn-hero i {
  transition: var(--transition-base);
}

.btn-hero:hover i {
  transform: translateX(5px);
}

.price-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.old-price {
  font-size: 1.25rem;
  color: var(--gray);
  text-decoration: line-through;
}

.new-price {
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.discount {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--success);
  color: var(--white);
  font-weight: 600;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
}

.hero-stats {
  display: flex;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  color: var(--gray-light);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInRight 0.8s ease-out 0.8s both;
}

.card-3d {
  width: 400px;
  height: 400px;
  perspective: 1000px;
}

.card-content {
  width: 100%;
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-2xl);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-2xl);
  transform-style: preserve-3d;
  animation: rotate3d 20s linear infinite;
}

.card-content i {
  font-size: 10rem;
  color: var(--white);
  opacity: 0.9;
}

/* ===== Sections ===== */
.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--gray-light);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Features ===== */
.features {
  padding: var(--spacing-3xl) 0;
  background: var(--dark-light);
}

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

.feature-card {
  padding: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
  transition: var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: var(--shadow-xl);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  color: var(--gray-light);
  line-height: 1.8;
}

/* ===== Program ===== */
.program {
  padding: var(--spacing-3xl) 0;
  background: var(--dark);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gradient-primary);
}

.timeline-item {
  position: relative;
  padding-left: 80px;
  margin-bottom: var(--spacing-xl);
}

.timeline-marker {
  position: absolute;
  left: 0;
  top: 0;
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
  box-shadow: var(--shadow-lg);
}

.timeline-content {
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  transition: var(--transition-base);
}

.timeline-content:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(99, 102, 241, 0.5);
  transform: translateX(10px);
}

.timeline-content h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.timeline-content p {
  color: var(--gray-light);
  line-height: 1.8;
}

/* ===== Testimonials ===== */
.testimonials {
  padding: var(--spacing-3xl) 0;
  background: var(--dark-light);
}

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

.testimonial {
  padding: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
  transition: var(--transition-base);
}

.testimonial:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(99, 102, 241, 0.5);
  box-shadow: var(--shadow-xl);
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.testimonial-header img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 2px solid var(--primary);
}

.testimonial-info h4 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xs);
}

.testimonial-info p {
  color: var(--gray);
  font-size: 0.875rem;
}

.rating {
  color: #fbbf24;
  margin-bottom: var(--spacing-md);
}

.testimonial-text {
  color: var(--gray-light);
  line-height: 1.8;
  font-style: italic;
}

/* ===== Pricing ===== */
.pricing {
  padding: var(--spacing-3xl) 0;
  background: var(--dark);
}

.pricing-card {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--spacing-2xl);
  background: rgba(255, 255, 255, 0.05);
  border: 2px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-2xl);
  backdrop-filter: blur(10px);
  position: relative;
  overflow: hidden;
}

.pricing-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
}

.pricing-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--gradient-primary);
  color: var(--white);
  font-weight: 600;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
}

.pricing-title {
  font-size: 2rem;
  margin-bottom: var(--spacing-lg);
}

.pricing-price {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
}

.price-old {
  font-size: 1.5rem;
  color: var(--gray);
  text-decoration: line-through;
}

.price-new {
  font-size: 3rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pricing-discount {
  color: var(--success);
  font-weight: 600;
  margin-bottom: var(--spacing-xl);
}

.pricing-features {
  list-style: none;
  margin-bottom: var(--spacing-xl);
}

.pricing-features li {
  padding: var(--spacing-sm) 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.pricing-features i {
  color: var(--success);
}

.btn-pricing {
  display: block;
  width: 100%;
  padding: var(--spacing-md);
  background: var(--gradient-primary);
  color: var(--white);
  text-align: center;
  text-decoration: none;
  font-weight: 600;
  font-size: 1.125rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  transition: var(--transition-base);
}

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

/* ===== Form ===== */
.form-section {
  padding: var(--spacing-3xl) 0;
  background: var(--dark-light);
}

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

.form-info h2 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.form-info p {
  color: var(--gray-light);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xl);
}

.form-benefits {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.benefit {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--gray-light);
}

.benefit i {
  color: var(--success);
  font-size: 1.25rem;
}

.registration-form {
  padding: var(--spacing-xl);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group input {
  width: 100%;
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--white);
  font-size: 1rem;
  transition: var(--transition-base);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(255, 255, 255, 0.08);
}

.form-group input::placeholder {
  color: var(--gray);
}

.btn-submit {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--gradient-primary);
  color: var(--white);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 1.125rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  transition: var(--transition-base);
  box-shadow: var(--shadow-lg);
}

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

.btn-submit i {
  transition: var(--transition-base);
}

.btn-submit:hover i {
  transform: translateX(5px);
}

/* ===== Footer ===== */
.footer {
  padding: var(--spacing-2xl) 0;
  background: var(--dark);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-brand p {
  color: var(--gray-light);
  margin-top: var(--spacing-sm);
}

.footer-links h4,
.footer-contact h4 {
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

.footer-links a {
  display: block;
  color: var(--gray-light);
  text-decoration: none;
  margin-bottom: var(--spacing-sm);
  transition: var(--transition-fast);
}

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

.footer-contact p {
  color: var(--gray-light);
  margin-bottom: var(--spacing-sm);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--gray);
}

.footer-legal {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-legal a {
  color: var(--gray);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

/* ===== Buttons ===== */
.btn-primary {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--gradient-primary);
  color: var(--white);
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: var(--transition-base);
  box-shadow: var(--shadow-md);
}

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

/* ===== 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 float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

@keyframes rotate3d {
  0% {
    transform: rotateY(0deg) rotateX(0deg);
  }
  100% {
    transform: rotateY(360deg) rotateX(360deg);
  }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero .container {
    grid-template-columns: 1fr;
  }
  
  .hero-visual {
    display: none;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .features-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .form-wrapper {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .timeline::before {
    left: 15px;
  }
  
  .timeline-item {
    padding-left: 50px;
  }
  
  .timeline-marker {
    width: 30px;
    height: 30px;
    font-size: 0.875rem;
  }
}