:root {
  /* Colors */
  --color-primary: #1E1E2E;
  --color-secondary: #2B2D42;
  --color-tertiary: #3C4048;
  --color-dark: #181818;
  --color-light: #F8F9FA;
  --color-gray: #ADB5BD;
  --color-gray-dark: #6C757D;
  --color-accent: #7B68EE;
  --color-accent-light: #9683F4;
  --color-accent-dark: #6148E4;
  --color-success: #36B37E;
  --color-warning: #FFAB00;
  --color-danger: #FF5630;
  
  /* Typography */
  --font-primary: 'Space Grotesk', sans-serif;
  --font-secondary: 'Inter', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3rem;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* Borders */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 1rem;
  --border-radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-inset: inset 0 2px 4px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Layout */
  --container-max-width: 1200px;
  --header-height: 4.5rem;
  --z-index-header: 1000;
  --z-index-popup: 2000;
}

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

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

body {
  font-family: var(--font-secondary);
  font-size: var(--font-size-md);
  line-height: 1.6;
  color: var(--color-light);
  background-color: var(--color-dark);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

h4 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--space-md);
}

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

a:hover {
  color: var(--color-accent-light);
}

button {
  cursor: pointer;
  font-family: var(--font-secondary);
}

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

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ========== Utility Classes ========== */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* ========== Button Styles ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-primary);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--border-radius-md);
  border: none;
  transition: all var(--transition-normal);
  text-align: center;
  line-height: 1;
  cursor: pointer;
  min-height: 2.75rem;
}

.btn i {
  margin-right: var(--space-sm);
}

.btn-primary {
  background-color: var(--color-accent);
  color: white;
}

.btn-primary:hover {
  background-color: var(--color-accent-light);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(123, 104, 238, 0.3);
}

.btn-secondary {
  background-color: var(--color-secondary);
  color: white;
}

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

.btn-outline {
  background-color: transparent;
  border: 2px solid var(--color-accent);
  color: var(--color-accent);
}

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

/* ========== Header Styles ========== */
.main-header {
  background-color: rgba(24, 24, 24, 0.8);
  backdrop-filter: blur(8px);
  position: absolute;
  width: 100%;
  z-index: var(--z-index-header);
  transition: transform var(--transition-slow);
}

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

.main-header.scrolled {
  position: fixed;
  transform: translateY(-100%);
}

.main-header.show-header {
  transform: translateY(0);
}

.logo {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: var(--font-size-lg);
  background: linear-gradient(45deg, var(--color-accent), #9683f4);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.logo a {
  color: inherit;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-light);
  font-size: var(--font-size-xl);
}

.main-nav ul {
  display: flex;
  gap: var(--space-lg);
}

.main-nav a {
  color: var(--color-light);
  font-weight: 500;
  padding: var(--space-sm) var(--space-sm);
  position: relative;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-normal);
}

.main-nav a:hover::after,
.main-nav a.active::after {
  transform: scaleX(1);
}

/* ========== Hero Section ========== */
.hero {
  padding: calc(var(--header-height) + var(--space-2xl)) 0 var(--space-4xl);
  background: linear-gradient(45deg, var(--color-dark), var(--color-primary));
  overflow: hidden;
  position: relative;
}

.hero .container {
  display: flex;
  align-items: center;
  gap: var(--space-3xl);
}

.hero-content {
  flex: 1;
  max-width: 600px;
  z-index: 2;
}

.hero h1 {
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-4xl);
  background: linear-gradient(45deg, #f8f9fa, #ADB5BD);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  line-height: 1.1;
}

.hero p {
  font-size: var(--font-size-lg);
  color: var(--color-gray);
  margin-bottom: var(--space-xl);
}

.hero-cta {
  display: flex;
  gap: var(--space-md);
}

.hero-visual {
  flex: 1;
  position: relative;
  height: 400px;
}

.shape-container {
  position: absolute;
  width: 100%;
  height: 100%;
  perspective: 1000px;
}

.animated-shape {
  position: absolute;
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent-dark));
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  opacity: 0.7;
  box-shadow: 0 0 30px rgba(123, 104, 238, 0.5);
  animation: morphShape 15s ease-in-out infinite;
}

.animated-shape:nth-child(1) {
  top: 10%;
  left: 10%;
  animation-delay: 0s;
  background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent-dark));
}

.animated-shape:nth-child(2) {
  top: 30%;
  left: 50%;
  animation-delay: -5s;
  background: linear-gradient(135deg, #6148E4, #9683F4);
  width: 150px;
  height: 150px;
}

.animated-shape:nth-child(3) {
  bottom: 20%;
  right: 20%;
  animation-delay: -10s;
  background: linear-gradient(135deg, #9683F4, #36B37E);
  width: 180px;
  height: 180px;
}

@keyframes morphShape {
  0% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  }
  25% {
    border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%;
  }
  50% {
    border-radius: 30% 30% 70% 70% / 70% 30% 30% 70%;
  }
  75% {
    border-radius: 70% 70% 30% 30% / 30% 70% 70% 30%;
  }
  100% {
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  }
}

/* ========== Featured Courses Section ========== */
.featured-courses {
  padding: var(--space-4xl) 0;
  background-color: var(--color-primary);
}

.featured-courses h2 {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.course-card {
  background-color: var(--color-secondary);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  display: flex;
  flex-direction: column;
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.course-card.featured::before {
  content: 'Popular';
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background-color: var(--color-accent);
  color: white;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  z-index: 2;
}

.course-visual {
  height: 150px;
  background: linear-gradient(45deg, rgba(46, 46, 72, 0.8), rgba(43, 45, 66, 0.8));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.course-visual::before {
  content: '';
  position: absolute;
  width: 150%;
  height: 150%;
  background: radial-gradient(circle at center, rgba(123, 104, 238, 0.3), transparent 70%);
  transform: translateY(20%);
  animation: pulse 4s ease-in-out infinite;
}

.course-icon {
  background: rgba(24, 24, 24, 0.5);
  width: 80px;
  height: 80px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

.course-icon i {
  font-size: 2.5rem;
  color: var(--color-accent);
}

.course-content {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.course-level {
  display: inline-block;
  background-color: rgba(123, 104, 238, 0.2);
  color: var(--color-accent-light);
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius-full);
  margin-bottom: var(--space-sm);
}

.course-card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}

.course-card p {
  color: var(--color-gray);
  margin-bottom: var(--space-lg);
  flex-grow: 1;
}

.course-details {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-gray);
}

.course-details span {
  display: flex;
  align-items: center;
}

.course-details i {
  margin-right: var(--space-xs);
}

.course-price {
  font-weight: 600;
  color: var(--color-accent);
  margin-left: auto;
}

@keyframes pulse {
  0% {
    transform: translateY(20%);
  }
  50% {
    transform: translateY(15%);
  }
  100% {
    transform: translateY(20%);
  }
}

/* ========== Approach Section ========== */
.approach-section {
  padding: var(--space-4xl) 0;
  background-color: var(--color-secondary);
  position: relative;
  overflow: hidden;
}

.approach-section .container {
  display: flex;
  align-items: center;
  gap: var(--space-3xl);
}

.approach-content {
  flex: 1;
  max-width: 600px;
  z-index: 2;
}

.approach-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
  margin: var(--space-xl) 0;
}

.approach-feature {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.approach-feature i {
  font-size: 1.75rem;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.approach-feature h3 {
  font-size: var(--font-size-md);
  margin-bottom: var(--space-sm);
}

.approach-feature p {
  color: var(--color-gray);
  font-size: var(--font-size-sm);
}

.approach-visual {
  flex: 1;
  position: relative;
  height: 400px;
}

.visual-wrapper {
  position: absolute;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.rotating-mesh {
  width: 250px;
  height: 250px;
  background: linear-gradient(135deg, rgba(123, 104, 238, 0.2), rgba(54, 179, 126, 0.2));
  border-radius: 20px;
  position: relative;
  transform-style: preserve-3d;
  animation: rotateMesh 20s linear infinite;
}

.rotating-mesh::before,
.rotating-mesh::after {
  content: '';
  position: absolute;
  width: 100%;
  height: 100%;
  border: 1px solid rgba(123, 104, 238, 0.3);
  border-radius: 20px;
}

.rotating-mesh::before {
  transform: rotateX(60deg) scale(1.2);
}

.rotating-mesh::after {
  transform: rotateY(60deg) scale(1.2);
}

.glow-effect {
  position: absolute;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle at center, rgba(123, 104, 238, 0.3), transparent 70%);
  border-radius: 50%;
  filter: blur(20px);
  animation: glow 6s ease-in-out infinite alternate;
}

@keyframes rotateMesh {
  0% {
    transform: rotate3d(1, 1, 1, 0deg);
  }
  100% {
    transform: rotate3d(1, 1, 1, 360deg);
  }
}

@keyframes glow {
  0% {
    opacity: 0.5;
    transform: scale(0.8);
  }
  100% {
    opacity: 0.8;
    transform: scale(1.2);
  }
}

/* ========== Testimonials Section ========== */
.testimonials-section {
  padding: var(--space-4xl) 0;
  background-color: var(--color-primary);
  text-align: center;
}

.testimonials-section h2 {
  margin-bottom: var(--space-3xl);
}

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

.testimonial {
  display: none;
  animation: fadeIn 0.5s ease forwards;
}

.testimonial.active {
  display: block;
}

.testimonial-content {
  background-color: var(--color-secondary);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  position: relative;
}

.testimonial-content p {
  font-size: var(--font-size-lg);
  font-style: italic;
  margin-bottom: var(--space-lg);
}

.testimonial-author {
  display: flex;
  align-items: center;
  justify-content: center;
}

.author-info {
  text-align: center;
}

.author-info h4 {
  margin-bottom: 0;
}

.author-info span {
  font-size: var(--font-size-sm);
  color: var(--color-gray);
}

.testimonial-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--space-xl);
}

.testimonial-controls button {
  background: none;
  border: none;
  color: var(--color-light);
  font-size: var(--font-size-xl);
  padding: var(--space-sm);
  transition: color var(--transition-normal);
}

.testimonial-controls button:hover {
  color: var(--color-accent);
}

.testimonial-indicators {
  display: flex;
  gap: var(--space-sm);
  margin: 0 var(--space-lg);
}

.testimonial-indicators span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-gray-dark);
  transition: background-color var(--transition-normal);
  cursor: pointer;
}

.testimonial-indicators span.active {
  background-color: var(--color-accent);
  transform: scale(1.2);
}

@keyframes fadeIn {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

/* ========== CTA Section ========== */
.cta-section {
  padding: var(--space-4xl) 0;
  background: linear-gradient(45deg, var(--color-dark), var(--color-primary));
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239683f4' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.cta-content {
  max-width: 700px;
  margin: 0 auto;
  z-index: 2;
  position: relative;
}

.cta-content h2 {
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-3xl);
}

.cta-content p {
  margin-bottom: var(--space-xl);
  font-size: var(--font-size-lg);
  color: var(--color-gray);
}

.cta-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}

/* ========== Footer Styles ========== */
.site-footer {
  background-color: var(--color-dark);
  padding: var(--space-2xl) 0 var(--space-lg);
  margin-top: auto;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-xl);
}

.footer-logo {
  flex: 1;
  min-width: 200px;
  max-width: 300px;
}

.footer-logo a {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: var(--font-size-lg);
  display: inline-block;
  margin-bottom: var(--space-sm);
  background: linear-gradient(45deg, var(--color-accent), #9683f4);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.footer-logo p {
  color: var(--color-gray);
  font-size: var(--font-size-sm);
}

.footer-links {
  flex: 2;
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.footer-column {
  min-width: 150px;
}

.footer-column h3 {
  font-size: var(--font-size-md);
  margin-bottom: var(--space-md);
}

.footer-column ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-column a {
  color: var(--color-gray);
  font-size: var(--font-size-sm);
  transition: color var(--transition-normal);
}

.footer-column a:hover {
  color: var(--color-light);
}

.contact-info p {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-gray);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-sm);
}

.contact-info i {
  color: var(--color-accent);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(248, 249, 250, 0.1);
  font-size: var(--font-size-sm);
  color: var(--color-gray-dark);
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-links a {
  color: var(--color-gray);
  font-size: var(--font-size-lg);
  transition: color var(--transition-normal), transform var(--transition-normal);
}

.social-links a:hover {
  color: var(--color-accent);
  transform: translateY(-3px);
}

/* ========== Policy Popup ========== */
.policy-popup {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-secondary);
  z-index: var(--z-index-popup);
  padding: var(--space-lg);
  transform: translateY(100%);
  transition: transform var(--transition-normal);
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
}

.policy-popup.show {
  transform: translateY(0);
}

.popup-content {
  max-width: 1000px;
  margin: 0 auto;
}

.popup-content h3 {
  margin-bottom: var(--space-sm);
}

.popup-content p {
  margin-bottom: var(--space-md);
  color: var(--color-gray);
}

.popup-buttons {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}

.cookie-settings {
  font-size: var(--font-size-sm);
  text-decoration: underline;
}

/* ========== Responsive Styles ========== */
@media (max-width: 1024px) {
  :root {
    --header-height: 4rem;
  }
  
  h1 {
    font-size: var(--font-size-2xl);
  }
  
  h2 {
    font-size: var(--font-size-xl);
  }
  
  .hero .container,
  .approach-section .container {
    flex-direction: column;
    gap: var(--space-2xl);
  }
  
  .hero-content,
  .approach-content {
    max-width: 100%;
  }
  
  .approach-features {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --space-4xl: 4rem;
    --space-3xl: 3rem;
    --space-2xl: 2.5rem;
    --font-size-4xl: 2.5rem;
    --font-size-3xl: 2rem;
    --font-size-2xl: 1.75rem;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background-color: var(--color-secondary);
    padding: var(--space-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
  }
  
  .main-nav.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .main-nav ul {
    flex-direction: column;
    gap: var(--space-md);
  }
  
  .hero-visual,
  .approach-visual {
    height: 300px;
  }
  
  .course-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--space-xl);
  }
  
  .footer-logo {
    max-width: 100%;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  
  .popup-buttons {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  :root {
    --space-lg: 1rem;
    --space-xl: 1.5rem;
    --space-2xl: 2rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.5rem;
  }
  
  .hero-cta {
    flex-direction: column;
    width: 100%;
  }
  
  .hero-cta .btn {
    width: 100%;
  }
  
  .testimonial-content p {
    font-size: var(--font-size-md);
  }
  
  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .cta-buttons .btn {
    width: 100%;
  }
}