/* ================================
   MODERN IT EDUCATION PLATFORM STYLES
   ================================ */

/* CSS Custom Properties - Design System */
:root {
  /* Modern Tech Color Palette */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --accent-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --dark-gradient: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
  
  /* Brand Colors */
  --primary-blue: #667eea;
  --primary-purple: #764ba2;
  --accent-cyan: #00f2fe;
  --accent-pink: #f5576c;
  
  /* Neutral Colors */
  --white: #ffffff;
  --light-gray: #f8fafc;
  --medium-gray: #64748b;
  --dark-gray: #1e293b;
  --black: #0f172a;
  
  /* Spacing System */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-heading: 'Poppins', var(--font-primary);
  
  /* 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;
  --text-6xl: 3.75rem;
  
  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
}

/* ================================
   BASE STYLES
   ================================ */

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

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

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--dark-gray);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ================================
   TYPOGRAPHY
   ================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--black);
}

h1 {
  font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-lg);
}

h2 {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  margin-bottom: var(--space-lg);
}

h3 {
  font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl));
  margin-bottom: var(--space-md);
}

h4 {
  font-size: clamp(var(--text-xl), 2vw, var(--text-2xl));
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-md);
  color: var(--medium-gray);
  font-size: var(--text-lg);
  line-height: 1.7;
}

a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: all var(--transition-fast);
}

a:hover {
  color: var(--primary-purple);
  text-decoration: underline;
}

/* ================================
   MODERN NAVIGATION
   ================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  padding: var(--space-md) 0;
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-lg);
}

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

.logo {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-link {
  font-weight: 500;
  color: var(--dark-gray);
  position: relative;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.nav-link:hover {
  color: var(--primary-blue);
  background: rgba(102, 126, 234, 0.1);
  text-decoration: none;
}

.nav-link.active {
  color: var(--primary-blue);
  background: rgba(102, 126, 234, 0.15);
}

/* Language Switcher */
.language-switcher {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
}

.lang-btn {
  background: none;
  border: 2px solid var(--primary-blue);
  color: var(--primary-blue);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 600;
  transition: all var(--transition-normal);
  min-width: 50px;
}

.lang-btn.active {
  background: var(--primary-gradient);
  color: var(--white);
  border-color: transparent;
}

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

/* Mobile Menu */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--text-2xl);
  cursor: pointer;
  color: var(--dark-gray);
}

/* ================================
   HERO SECTION
   ================================ */

.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="white" opacity="0.1"/><circle cx="80" cy="40" r="1" fill="white" opacity="0.1"/><circle cx="40" cy="80" r="1.5" fill="white" opacity="0.1"/></svg>');
  animation: float 20s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-content h1 {
  color: var(--white);
  background: none;
  -webkit-text-fill-color: initial;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  margin-bottom: var(--space-lg);
}

.hero-content p {
  font-size: var(--text-xl);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-xl);
  line-height: 1.8;
}

.cta-buttons {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: var(--text-lg);
  text-decoration: none;
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  outline: none;
}

.btn-sm {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--text-base);
  border-radius: var(--radius-md);
}

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

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
  color: var(--primary-purple);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: var(--white);
  border: 2px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-3px);
  color: var(--white);
  text-decoration: none;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-graphic {
  width: 100%;
  max-width: 500px;
  height: 400px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-2xl);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.code-animation {
  font-family: 'Courier New', monospace;
  color: var(--white);
  font-size: var(--text-sm);
  line-height: 1.8;
  opacity: 0.8;
  white-space: pre-line;
  animation: typewriter 4s steps(50) infinite;
}

@keyframes typewriter {
  0% { width: 0; }
  50% { width: 100%; }
  100% { width: 0; }
}

/* ================================
   MODERN SECTIONS
   ================================ */

.section {
  padding: var(--space-3xl) 0;
}

.section-alternate {
  background: var(--light-gray);
}

.cta-section {
  background: var(--secondary-gradient);
  color: var(--white);
}

.cta-section h2, 
.cta-section p {
  color: var(--white);
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--primary-blue);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ================================
   LEARNING PATH TIMELINE
   ================================ */

.timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-2xl) 0;
}

.timeline:before {
  content: '';
  position: absolute;
  width: 6px;
  background: linear-gradient(to bottom, var(--primary-blue), var(--primary-purple));
  top: 0;
  bottom: 0;
  left: 50px;
  margin-left: -3px;
  border-radius: 20px;
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-3xl);
  padding-left: 120px;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-marker {
  position: absolute;
  left: 50px;
  transform: translateX(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--primary-blue);
  border: 3px solid var(--primary-blue);
  box-shadow: var(--shadow-lg);
  z-index: 1;
  transition: all var(--transition-normal);
}

.timeline-marker-active {
  background: var(--primary-gradient);
  color: var(--white);
  border-color: var(--white);
}

.timeline-content {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border-left: 4px solid var(--primary-blue);
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.timeline-details {
  display: flex;
  gap: var(--space-lg);
  margin-top: var(--space-md);
  color: var(--medium-gray);
  font-size: var(--text-sm);
  font-weight: 600;
}

.timeline-details span {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.timeline-details span:before {
  content: '•';
  color: var(--primary-blue);
  font-size: var(--text-xl);
}

.timeline-cta {
  text-align: center;
  margin-top: var(--space-2xl);
}

/* ================================
   COURSE TABLE
   ================================ */

.course-table-container {
  width: 100%;
  overflow-x: auto;
  margin-bottom: var(--space-2xl);
  background: linear-gradient(to right, white 30%, rgba(255, 255, 255, 0)), linear-gradient(to right, rgba(255, 255, 255, 0), white 70%) 100% 0, radial-gradient(farthest-side at 0 50%, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0)), radial-gradient(farthest-side at 100% 50%, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0)) 100% 0;
  background-repeat: no-repeat;
  background-color: white;
  background-size: 40px 100%, 40px 100%, 14px 100%, 14px 100%;
  background-position: 0 0, 100% 0, 0 0, 100% 0;
  background-attachment: local, local, scroll, scroll;
  border-radius: var(--radius-lg);
}

.course-table {
  width: 100%;
  min-width: 900px;
  border-collapse: collapse;
  background-color: var(--white);
}

.course-table th {
  text-align: left;
  padding: var(--space-md);
  border-bottom: 2px solid var(--primary-blue);
  color: var(--black);
  font-weight: 700;
  font-size: var(--text-lg);
  background-color: var(--white);
  position: sticky;
  top: 0;
  z-index: 10;
}

.course-table td {
  padding: var(--space-md);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  vertical-align: middle;
}

.course-table tr:last-child td {
  border-bottom: none;
}

.course-table tr {
  transition: all var(--transition-fast);
}

.course-table tr:hover {
  background-color: rgba(102, 126, 234, 0.05);
}

.featured-course {
  background-color: rgba(102, 126, 234, 0.08);
  position: relative;
}

.featured-course::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--primary-gradient);
  border-radius: 4px;
}

.course-name {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.course-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  color: var(--white);
}

.tag {
  display: inline-block;
  font-size: var(--text-xs);
  padding: 2px 8px;
  border-radius: 20px;
  margin-top: 4px;
  color: var(--white);
  font-weight: 600;
}

.popular-tag {
  background: var(--primary-gradient);
}

.new-tag {
  background: var(--accent-gradient);
}

.hot-tag {
  background: var(--secondary-gradient);
}

.course-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  background: var(--white);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.feature-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 30px;
  height: 30px;
  background: var(--primary-gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: bold;
  flex-shrink: 0;
}

.feature-text h4 {
  margin-bottom: var(--space-xs);
  color: var(--black);
}

.feature-text p {
  font-size: var(--text-base);
  margin-bottom: 0;
  color: var(--medium-gray);
}

/* ================================
   STUDENT PROJECTS SHOWCASE
   ================================ */

.projects-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.project-item {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

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

.project-image {
  height: 220px;
  background: linear-gradient(135deg, #4b6cb7 0%, #182848 100%);
  position: relative;
  overflow: hidden;
}

.project-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-md);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.project-item:hover .project-overlay {
  opacity: 1;
}

.project-tech {
  color: var(--white);
  background: rgba(0, 0, 0, 0.5);
  padding: var(--space-xs) var(--space-md);
  border-radius: 20px;
  font-weight: 600;
  font-size: var(--text-sm);
}

.project-info {
  padding: var(--space-lg);
}

.project-info h3 {
  margin-bottom: var(--space-xs);
  font-size: var(--text-xl);
}

.project-info p {
  font-size: var(--text-base);
  margin-bottom: var(--space-lg);
  color: var(--medium-gray);
}

.project-student {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.student-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.student-name {
  font-weight: 600;
  color: var(--black);
}

.student-course {
  font-size: var(--text-sm);
  color: var(--medium-gray);
}

/* ================================
   INSTRUCTOR CARDS
   ================================ */

.instructors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.instructor-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

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

.instructor-image {
  height: 400px;
  position: relative;
  overflow: hidden;
}

.instructor-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.instructor-info {
  padding: var(--space-lg);
}

.instructor-info h3 {
  margin-bottom: 0;
}

.instructor-title {
  color: var(--primary-blue);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.instructor-expertise {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-top: var(--space-md);
}

.expertise-tag {
  background: rgba(102, 126, 234, 0.1);
  color: var(--primary-blue);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 20px;
  font-size: var(--text-xs);
  font-weight: 600;
}

/* ================================
   TESTIMONIALS
   ================================ */

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.testimonial-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.testimonial-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.testimonial-content {
  position: relative;
}

.testimonial-quote {
  font-size: 4rem;
  position: absolute;
  top: -30px;
  left: -10px;
  color: rgba(102, 126, 234, 0.1);
  font-family: Georgia, serif;
}

.testimonial-content p {
  position: relative;
  z-index: 1;
  color: var(--dark-gray);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.testimonial-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--white);
  box-shadow: var(--shadow-sm);
}

.testimonial-info h4 {
  margin-bottom: 0;
  color: var(--black);
}

.testimonial-position {
  font-size: var(--text-sm);
  color: var(--primary-blue);
  font-weight: 600;
  margin-bottom: 2px;
}

.testimonial-course {
  font-size: var(--text-xs);
  color: var(--medium-gray);
}

.student-results-banner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  background: var(--primary-gradient);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  color: var(--white);
  text-align: center;
  margin-bottom: var(--space-xl);
}

.results-number {
  font-size: var(--text-4xl);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.results-label {
  font-size: var(--text-base);
  opacity: 0.9;
}

/* ================================
   FAQ ACCORDION
   ================================ */

.faq-container {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.faq-item {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.faq-question {
  padding: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  background: var(--white);
  transition: all var(--transition-normal);
}

.faq-question:hover {
  background: rgba(102, 126, 234, 0.05);
}

.faq-question h4 {
  margin: 0;
  font-weight: 600;
  flex: 1;
}

.faq-icon {
  font-size: var(--text-2xl);
  color: var(--primary-blue);
  transition: all var(--transition-normal);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
  border-top: 0px solid rgba(0, 0, 0, 0.1);
}

.faq-item.active .faq-answer {
  max-height: 500px;
  border-top-width: 1px;
}

.faq-answer p {
  padding: var(--space-lg);
  padding-top: var(--space-md);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-contact-info {
  background: var(--primary-gradient);
  color: var(--white);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  position: sticky;
  top: 100px;
}

.faq-contact-info h3 {
  color: var(--white);
  margin-bottom: var(--space-md);
}

.faq-contact-info p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-lg);
}

/* ================================
   MODERN CARDS
   ================================ */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}

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

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

.card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: var(--accent-gradient);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  font-size: var(--text-2xl);
  color: var(--white);
}

.card h3 {
  color: var(--black);
  margin-bottom: var(--space-md);
}

.card p {
  color: var(--medium-gray);
  margin-bottom: var(--space-lg);
}

.card-link {
  color: var(--primary-blue);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  transition: all var(--transition-fast);
}

.card-link:hover {
  color: var(--primary-purple);
  transform: translateX(5px);
}

/* ================================
   STATISTICS SECTION
   ================================ */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
}

.stat-item {
  text-align: center;
  padding: var(--space-xl);
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.stat-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  font-size: var(--text-5xl);
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-sm);
}

.stat-label {
  font-size: var(--text-lg);
  color: var(--medium-gray);
  font-weight: 600;
}

/* ================================
   CONTACT FORM
   ================================ */

.contact-form {
  background: var(--white);
  padding: var(--space-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-width: 1200px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: 600;
  color: var(--dark-gray);
}

.form-input {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid rgba(102, 126, 234, 0.2);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  transition: all var(--transition-normal);
  background: var(--light-gray);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  background: var(--white);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* ================================
   FOOTER
   ================================ */

.footer {
  background: var(--dark-gradient);
  color: var(--white);
  padding: var(--space-3xl) 0 var(--space-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
}

.footer-section h3 {
  color: var(--white);
  margin-bottom: var(--space-lg);
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-sm);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
}

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

@media (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    text-align: center;
  }
  
  .cards-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
  
  .faq-container {
    grid-template-columns: 1fr;
  }
  
  .timeline {
    padding-left: var(--space-lg);
  }
  
  .projects-showcase {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: block;
  }
  
  .nav-menu.active {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: var(--space-lg);
    box-shadow: var(--shadow-lg);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .timeline-item {
    padding-left: 80px;
  }
  
  .instructors-grid {
    grid-template-columns: 1fr;
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container,
  .nav-container {
    padding: 0 var(--space-md);
  }
  
  .hero {
    padding-top: 100px;
  }
  
  .section {
    padding: var(--space-2xl) 0;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-form {
    padding: var(--space-lg);
  }
  
  .timeline:before {
    left: 30px;
  }
  
  .timeline-marker {
    left: 30px;
    width: 40px;
    height: 40px;
  }
  
  .timeline-item {
    padding-left: 60px;
  }
  
  .student-results-banner {
    grid-template-columns: 1fr;
  }
}

/* ================================
   ANIMATIONS
   ================================ */

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

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

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

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.animate-fade-in-left {
  animation: fadeInLeft 0.6s ease-out;
}

.animate-fade-in-right {
  animation: fadeInRight 0.6s ease-out;
}

/* ================================
   UTILITY CLASSES
   ================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none; }
.visible { display: block; }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

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



/* ================================
   CONTACT INFO SECTION (cards + social)
   ================================ */

.column > h2 {
  margin-bottom: var(--space-md);
}

.column > p {
  max-width: 60ch;
  margin-bottom: var(--space-xl);
}

/* Grid for contact cards */
.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

/* Card */
.contact-item {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
  gap: var(--space-md);
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  position: relative;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  border: 1px solid rgba(15, 23, 42, 0.06); /* subtle */
}

.contact-item::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px; /* gradient border */
  background: var(--primary-gradient);
  -webkit-mask:
    linear-gradient(#000 0 0) content-box, 
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  opacity: .12;
  pointer-events: none;
}

.contact-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
}

/* Icon chip */
.contact-item__icon {
  flex: 0 0 56px;
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--accent-gradient);
  color: var(--white);            /* SVG stroke uses currentColor */
  box-shadow: var(--shadow-glow);
  transition: transform var(--transition-normal);
}

.contact-item:hover .contact-item__icon {
  transform: rotate(-4deg) scale(1.04);
}

.contact-item__content h4 {
  margin-bottom: 4px;
  font-size: var(--text-xl);
  color: var(--black);
}

.contact-item__content p {
  margin: 0;
  color: var(--medium-gray);
  font-size: var(--text-base);
}

.contact-item__content a {
  font-weight: 700;
  color: var(--primary-blue);
  text-decoration: none;
  border-bottom: 1px dashed rgba(102, 126, 234, .35);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.contact-item__content a:hover {
  color: var(--primary-purple);
  border-color: rgba(118, 75, 162, .55);
  text-decoration: none;
}

/* Social */
.social-links {
  margin-top: var(--space-2xl);
}

.social-links h4 {
  margin-bottom: var(--space-md);
  color: var(--black);
}

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

.social-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(102, 126, 234, 0.08);
  color: var(--primary-blue);
  border: 1px solid rgba(102, 126, 234, 0.15);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal), color var(--transition-normal);
}

.social-icon:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background: var(--primary-gradient);
  color: var(--white);
}

/* Entrance animations to match your system */
.slide-in-left { 
  animation: fadeInLeft .6s ease-out both;
}

.stagger-item {
  opacity: 0;
  animation: fadeInUp .6s ease-out forwards;
}

.contact-item.stagger-item:nth-child(1) { animation-delay: .05s; }
.contact-item.stagger-item:nth-child(2) { animation-delay: .12s; }
.contact-item.stagger-item:nth-child(3) { animation-delay: .19s; }
.contact-item.stagger-item:nth-child(4) { animation-delay: .26s; }

/* Responsive tweaks */
@media (max-width: 480px) {
  .contact-item {
    padding: var(--space-md);
    border-radius: var(--radius-lg);
  }
  .contact-item__icon {
    width: 52px; height: 52px; border-radius: 12px;
  }
}


/* ================================
   UNIQUE LEARNING METHOD (features)
   ================================ */

.section-animated {
  position: relative;
  isolation: isolate;
}

.two-column-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr; /* готово под правую колонку (картинка/иллюстрация), если появится */
  gap: var(--space-2xl);
}

.two-column-layout .column > h2 {
  margin-bottom: var(--space-sm);
}

.two-column-layout .column > p {
  max-width: 65ch;
  margin-bottom: var(--space-xl);
  color: var(--medium-gray);
}

/* Features list */
.features-list {
  display: grid;
  gap: var(--space-lg);
}

.feature {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-md);
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(15, 23, 42, 0.06);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  position: relative;
  overflow: hidden;
}

/* декоративная тонкая градиентная «полоса» сверху при ховере */
.feature::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--primary-gradient);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-normal);
}

.feature:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(102, 126, 234, .25);
}

.feature:hover::before { transform: scaleX(1); }

/* Icon chip */
.feature__icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: var(--accent-gradient);
  color: var(--white);          /* SVG uses currentColor */
  box-shadow: var(--shadow-glow);
  transform: translateZ(0);
  transition: transform var(--transition-normal);
}

.feature:hover .feature__icon {
  transform: rotate(-4deg) scale(1.05);
}

.feature__content h4 {
  margin-bottom: 6px;
  color: var(--black);
  font-size: var(--text-xl);
}

.feature__content p {
  margin: 0;
  color: var(--medium-gray);
  font-size: var(--text-base);
}

/* Stagger для .stagger-item уже есть в файле; добавим безопасные задержки */
.features-list .stagger-item:nth-child(1) { animation-delay: .06s; }
.features-list .stagger-item:nth-child(2) { animation-delay: .14s; }
.features-list .stagger-item:nth-child(3) { animation-delay: .22s; }

/* ================================
   BENEFITS GRID
   ================================ */

.section--alt {
  background: var(--light-gray);
}

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.benefit-card {
  background: var(--white);
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(15, 23, 42, 0.06);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

/* мягкий радиальный подсвет под иконкой */
.benefit-card::after {
  content: '';
  position: absolute;
  width: 220px;
  height: 220px;
  right: -60px;
  top: -60px;
  background: radial-gradient(closest-side, rgba(102,126,234,.18), rgba(118,75,162,.0));
  filter: blur(6px);
  pointer-events: none;
}

.benefit-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(102, 126, 234, .25);
}

.benefit-card__icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: var(--primary-gradient);
  color: var(--white);
  box-shadow: var(--shadow-glow);
  margin-bottom: var(--space-md);
  transition: transform var(--transition-normal);
}

.benefit-card:hover .benefit-card__icon {
  transform: translateY(-3px) rotate(-3deg);
}

.benefit-card h3 {
  margin-bottom: var(--space-sm);
  color: var(--black);
  font-size: clamp(var(--text-lg), 2.2vw, var(--text-2xl));
}

.benefit-card p {
  margin: 0;
  color: var(--medium-gray);
  font-size: var(--text-base);
}

/* Stagger для карточек преимуществ */
.benefit-card.stagger-item:nth-child(1) { animation-delay: .05s; }
.benefit-card.stagger-item:nth-child(2) { animation-delay: .12s; }
.benefit-card.stagger-item:nth-child(3) { animation-delay: .19s; }
.benefit-card.stagger-item:nth-child(4) { animation-delay: .26s; }
.benefit-card.stagger-item:nth-child(5) { animation-delay: .33s; }
.benefit-card.stagger-item:nth-child(6) { animation-delay: .40s; }

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

@media (max-width: 1024px) {
  .two-column-layout {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 480px) {
  .feature,
  .benefit-card {
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
  }
  .feature__icon,
  .benefit-card__icon {
    width: 56px; height: 56px; border-radius: 14px;
  }
}
/* ================================
   IMPRESSIVE RESULTS (stats)
   ================================ */

.two-column-layout.reversed {
  display: grid;
  grid-template-columns: 1fr 1fr;   /* запас на вторую колонку, если будет */
  gap: var(--space-2xl);
}

.two-column-layout.reversed .column > h2 { margin-bottom: var(--space-sm); }
.two-column-layout.reversed .column > p  { max-width: 65ch; margin-bottom: var(--space-xl); }

.stats-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-xl);
}

.stat {
  background: var(--white);
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(15, 23, 42, 0.06);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
  text-align: left;
}

.stat::before {
  content: '';
  position: absolute;
  inset: -40% -40% auto auto;
  width: 220px;
  height: 220px;
  background: radial-gradient(closest-side, rgba(102,126,234,.18), rgba(118,75,162,0));
  filter: blur(8px);
  pointer-events: none;
}

.stat:hover { 
  transform: translateY(-6px); 
  box-shadow: var(--shadow-xl);
  border-color: rgba(102,126,234,.25);
}

.stat__number {
  font-size: clamp(2.25rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1;
  margin-bottom: var(--space-sm);
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat__label {
  font-size: var(--text-lg);
  color: var(--medium-gray);
  font-weight: 600;
}

/* stagger delays */
.stats-container .stagger-item:nth-child(1){ animation-delay: .06s; }
.stats-container .stagger-item:nth-child(2){ animation-delay: .14s; }
.stats-container .stagger-item:nth-child(3){ animation-delay: .22s; }
.stats-container .stagger-item:nth-child(4){ animation-delay: .30s; }

/* ================================
   TESTIMONIALS (carousel / grid)
   ================================ */

.testimonials-carousel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.testimonial-card {
  background: var(--white);
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(15,23,42,.06);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.testimonial-card::before {
  content: '“';
  position: absolute;
  top: -12px;
  left: 12px;
  font-size: 6rem;
  line-height: 1;
  font-family: Georgia, serif;
  color: rgba(102,126,234,.12);
  pointer-events: none;
}

.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(102,126,234,.25);
}

.testimonial-card__content p {
  margin: 0 0 var(--space-lg);
  color: var(--dark-gray);
  font-style: italic;
  font-size: var(--text-lg);
}

.testimonial-card__author {
  display: grid;
  gap: 2px;
}

.testimonial-card__name {
  font-weight: 700;
  color: var(--black);
  font-size: var(--text-lg);
}

.testimonial-card__position {
  font-size: var(--text-sm);
  color: var(--primary-blue);
  font-weight: 600;
}

/* stagger */
.testimonials-carousel .stagger-item:nth-child(1){ animation-delay: .05s; }
.testimonials-carousel .stagger-item:nth-child(2){ animation-delay: .12s; }
.testimonials-carousel .stagger-item:nth-child(3){ animation-delay: .19s; }

/* Mobile: горизонтальная прокрутка со snap без JS */
@media (max-width: 768px) {
  .testimonials-carousel {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 85%;
    overflow-x: auto;
    gap: var(--space-lg);
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding-bottom: var(--space-sm);
  }
  .testimonial-card { scroll-snap-align: start; }
}

/* ================================
   COMPARISON TABLE
   ================================ */

.comparison-table-container {
  width: 100%;
  overflow-x: auto;
  margin-bottom: var(--space-2xl);
  background: linear-gradient(to right, white 30%, rgba(255,255,255,0)), 
              linear-gradient(to right, rgba(255,255,255,0), white 70%) 100% 0,
              radial-gradient(farthest-side at 0 50%, rgba(0,0,0,.15), rgba(0,0,0,0)),
              radial-gradient(farthest-side at 100% 50%, rgba(0,0,0,.15), rgba(0,0,0,0)) 100% 0;
  background-repeat: no-repeat;
  background-size: 40px 100%, 40px 100%, 12px 100%, 12px 100%;
  background-position: 0 0, 100% 0, 0 0, 100% 0;
  background-attachment: local, local, scroll, scroll;
  border-radius: var(--radius-lg);
}

.comparison-table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  background-color: var(--white);
}

.comparison-table thead th {
  text-align: left;
  padding: var(--space-md);
  border-bottom: 2px solid var(--primary-blue);
  color: var(--black);
  font-weight: 800;
  font-size: var(--text-lg);
  position: sticky;
  top: 0;
  background: var(--white);
  z-index: 1;
}

.comparison-table tbody td {
  padding: var(--space-md);
  border-bottom: 1px solid rgba(0,0,0,.08);
  vertical-align: middle;
  font-size: var(--text-base);
  color: var(--dark-gray);
}

.comparison-table tbody tr:hover {
  background: rgba(102,126,234,.05);
}

/* Первая колонка — акцент */
.comparison-table tbody td:first-child {
  font-weight: 700;
  color: var(--black);
}

/* Вторая колонка (наш бренд) — подсветка */
.comparison-table tbody td:nth-child(2) {
  background: rgba(102,126,234,.06);
  font-weight: 700;
  border-left: 4px solid transparent;
}

.comparison-table tbody tr:hover td:nth-child(2) {
  border-left-color: var(--primary-blue);
}

/* входные задержки строк */
.comparison-table tbody .stagger-item:nth-child(1){ animation-delay: .06s; }
.comparison-table tbody .stagger-item:nth-child(2){ animation-delay: .12s; }
.comparison-table tbody .stagger-item:nth-child(3){ animation-delay: .18s; }
.comparison-table tbody .stagger-item:nth-child(4){ animation-delay: .24s; }
.comparison-table tbody .stagger-item:nth-child(5){ animation-delay: .30s; }

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

@media (max-width: 1024px) {
  .two-column-layout.reversed {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 480px) {
  .stat, .testimonial-card { 
    padding: var(--space-lg); 
    border-radius: var(--radius-lg);
  }
  .stat__label { font-size: var(--text-base); }
}