/* ===== Яркий современный CSS для Нейродети ===== */

/* CSS Custom Properties */
:root {
  /* Основная цветовая палитра */
  --primary-purple: #8B5CF6;
  --primary-blue: #3B82F6;
  --primary-green: #10B981;
  --primary-orange: #F59E0B;
  --primary-pink: #EC4899;
  --primary-cyan: #06B6D4;
  
  /* Светлые тона */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F8FAFC;
  --bg-card: #FFFFFF;
  --bg-accent: #F1F5F9;
  --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  /* Текстовые цвета */
  --text-primary: #1E293B;
  --text-secondary: #64748B;
  --text-muted: #94A3B8;
  --text-accent: #6366F1;
  
  /* Яркие градиенты */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-warning: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
  
  /* Тени */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1);
  --shadow-color: 0 8px 32px rgba(102, 126, 234, 0.25);
  --shadow-hover: 0 12px 40px rgba(102, 126, 234, 0.3);
  
  /* Радиусы */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 50px;
  
  /* Типографика */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Poppins', var(--font-primary);
  
  /* Анимации */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Размеры */
  --container-max: 1200px;
  --section-padding: clamp(60px, 8vw, 120px);
  --content-gap: 2rem;
}

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

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

html {
  scroll-behavior: smooth;
  font-size: clamp(14px, 1.5vw, 16px);
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* Анимированный фон */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 80%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
  animation: backgroundFloat 20s ease-in-out infinite;
}

@keyframes backgroundFloat {
  0%, 100% { opacity: 0.3; transform: scale(1) rotate(0deg); }
  50% { opacity: 0.6; transform: scale(1.1) rotate(180deg); }
}

/* ===== Заголовок ===== */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 2rem;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(102, 126, 234, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.topbar:hover {
  background: rgba(255, 255, 255, 0.98);
  border-bottom-color: rgba(102, 126, 234, 0.2);
  box-shadow: var(--shadow-md);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: transform var(--transition-normal);
}

.logo:hover {
  transform: scale(1.05);
}

.logo img {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-color);
}

.brand {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

#nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

#nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: all var(--transition-normal);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-full);
}

#nav a:hover {
  color: var(--primary-purple);
  background: rgba(139, 92, 246, 0.1);
  transform: translateY(-2px);
}

#nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: all var(--transition-normal);
  transform: translateX(-50%);
  border-radius: 2px;
}

#nav a:hover::after {
  width: 80%;
}

#burger {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  gap: 4px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-normal);
}

#burger:hover {
  background: rgba(139, 92, 246, 0.1);
}

#burger span {
  width: 25px;
  height: 3px;
  background: var(--gradient-primary);
  transition: all var(--transition-normal);
  border-radius: 2px;
}

/* ===== Основное содержимое ===== */
main {
  margin-top: 80px;
}

/* ===== Hero секция ===== */
.hero {
  min-height: 90vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--section-padding) 2rem;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  color: white;
}

.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"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="50" r="0.5" fill="white" opacity="0.15"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
  pointer-events: none;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero .green {
  background: linear-gradient(45deg, #43e97b, #38f9d7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.hero .green::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, #43e97b, #38f9d7);
  opacity: 0.3;
  filter: blur(20px);
  z-index: -1;
}

.hero p {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  max-width: 700px;
  margin-bottom: 2.5rem;
  position: relative;
  z-index: 1;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

/* ===== Кнопки ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 2.5rem;
  background: var(--gradient-secondary);
  color: white;
  text-decoration: none;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  font-size: 1.1rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: var(--shadow-xl), var(--shadow-hover);
}

.btn:active {
  transform: translateY(-1px) scale(1.02);
}

.btn-large {
  padding: 1.5rem 3rem;
  font-size: 1.2rem;
}

/* ===== Секции ===== */
section {
  padding: var(--section-padding) 2rem;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
}

/* ===== Заголовки секций ===== */
h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 3rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  width: 60px;
  height: 4px;
  background: var(--gradient-secondary);
  border-radius: 2px;
  transform: translateX(-50%);
}

h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

/* ===== About секция ===== */
.about {
  background: var(--bg-secondary);
}

.about p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 800px;
  margin: 0 auto 2rem;
  text-align: center;
}

.about ul {
  max-width: 800px;
  margin: 0 auto;
  list-style: none;
}

.about li {
  margin-bottom: 1rem;
  padding: 1rem 1.5rem;
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
  padding-left: 3rem;
}

.about li::before {
  content: '🚀';
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
}

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

.highlight-box {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 2rem;
  border-radius: var(--radius-lg);
  margin-top: 3rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.highlight-box h3 {
  color: white;
  margin-bottom: 1rem;
}

/* ===== Program секция ===== */
.program-intro {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 3rem;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.step {
  background: var(--gradient-card);
  border: 1px solid rgba(102, 126, 234, 0.1);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

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

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

.step:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(102, 126, 234, 0.3);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  color: white;
  border-radius: 50%;
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-md);
}

.step h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.step p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.step strong {
  color: var(--text-primary);
  font-weight: 600;
}

.step em {
  color: var(--primary-purple);
  font-style: normal;
  font-weight: 500;
}

.tech-stack {
  margin-top: 4rem;
  text-align: center;
}

.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
}

.tech-item {
  padding: 0.75rem 1.5rem;
  background: var(--gradient-primary);
  color: white;
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: 0.9rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.tech-item:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: var(--shadow-md);
}

/* ===== Projects секция ===== */
.projects {
  background: var(--bg-secondary);
}

.projects-intro {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 3rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.project-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid rgba(102, 126, 234, 0.1);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-secondary);
}

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

.project-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.author {
  background: rgba(102, 126, 234, 0.1);
  color: var(--primary-purple);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-weight: 500;
}

.lessons {
  background: rgba(16, 185, 129, 0.1);
  color: var(--primary-green);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-weight: 500;
}

/* ===== Pricing секция ===== */
.pricing-intro {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 3rem;
}

.tariffs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.tariff {
  background: white;
  border: 2px solid rgba(102, 126, 234, 0.1);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.tariff.recommend {
  border-color: var(--primary-purple);
  box-shadow: var(--shadow-color);
  transform: scale(1.05);
  background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
}

.tariff:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-purple);
}

.tariff.recommend:hover {
  transform: translateY(-10px) scale(1.07);
}

.badge {
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-secondary);
  color: white;
  padding: 0.5rem 1.5rem;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: var(--shadow-md);
}

.tariff h3 {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.price {
  margin-bottom: 0.5rem;
}

.amount {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

.currency {
  font-size: 1.5rem;
  color: var(--text-secondary);
}

.period {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.savings {
  background: rgba(16, 185, 129, 0.1);
  color: var(--primary-green);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  margin-bottom: 1.5rem;
  display: inline-block;
}

.benefits {
  list-style: none;
  text-align: left;
}

.benefits li {
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(102, 126, 234, 0.1);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.discount {
  color: var(--primary-green);
  font-weight: 500;
  font-size: 0.9rem;
}

.cta-section {
  text-align: center;
  background: var(--gradient-primary);
  color: white;
  padding: 3rem 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.cta-section h3 {
  color: white;
  margin-bottom: 1rem;
}

.cta-section p {
  margin-bottom: 2rem;
  opacity: 0.9;
}

/* ===== Requirements секция ===== */
.requirements {
  background: var(--bg-secondary);
}

.requirements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.requirement {
  background: white;
  padding: 2rem;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid rgba(102, 126, 234, 0.1);
}

.requirement:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.req-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  display: block;
}

.requirement h3 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.requirement p {
  color: var(--text-secondary);
}

/* ===== Benefits секция ===== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.benefit {
  background: white;
  padding: 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid rgba(102, 126, 234, 0.1);
  position: relative;
  overflow: hidden;
}

.benefit::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-warning);
}

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

.benefit h3 {
  margin-bottom: 1rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.benefit p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Social Media секция ===== */
.social {
  background: var(--bg-secondary);
}

.social-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
}

.social-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 2rem 1rem;
  background: white;
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(102, 126, 234, 0.1);
  position: relative;
  overflow: hidden;
}

.social-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.5), transparent);
  transition: left var(--transition-slow);
}

.social-card:hover::before {
  left: 100%;
}

.social-card:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: var(--shadow-lg);
}

.social-icon {
  font-size: 2rem;
}

.social-name {
  font-weight: 600;
  color: var(--text-primary);
}

/* Специальные цвета для соцсетей */
.social-card.vk:hover { border-color: #4680c2; }
.social-card.tg:hover { border-color: #229ed9; }
.social-card.yt:hover { border-color: #ff0000; }
.social-card.tiktok:hover { border-color: #ff0050; }

/* ===== FAQ секция ===== */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: white;
  border: 1px solid rgba(102, 126, 234, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.faq-item:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(102, 126, 234, 0.3);
}

.faq-item summary {
  padding: 1.5rem 2rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--text-primary);
  background: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
  transition: all var(--transition-normal);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-purple);
  transition: transform var(--transition-normal);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

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

.faq-item p {
  padding: 0 2rem 1.5rem;
  color: var(--text-secondary);
  line-height: 1.7;
  animation: fadeInUp 0.3s ease-out;
}

/* ===== Testimonials секция ===== */
.testimonials {
  background: var(--bg-secondary);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.testimonial {
  background: white;
  padding: 2.5rem 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(102, 126, 234, 0.1);
  position: relative;
  transition: all var(--transition-normal);
}

.testimonial::before {
  content: '"';
  position: absolute;
  top: -10px;
  left: 2rem;
  font-size: 4rem;
  color: var(--primary-purple);
  font-family: serif;
  line-height: 1;
  background: white;
  padding: 0 0.5rem;
}

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

.testimonial p {
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.testimonial cite {
  font-weight: 600;
  color: var(--primary-purple);
  font-style: normal;
}

/* ===== Contact секция ===== */
.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid rgba(102, 126, 234, 0.1);
}

.contact-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

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

.contact-item a {
  color: var(--primary-purple);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-normal);
}

.contact-item a:hover {
  color: var(--primary-pink);
}

/* ===== Registration Form ===== */
.registration-form {
  background: white;
  padding: 3rem 2rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(102, 126, 234, 0.1);
  max-width: 600px;
  margin: 0 auto;
}

.registration-form h3 {
  text-align: center;
  margin-bottom: 2rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-primary);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 1rem;
  border: 2px solid rgba(102, 126, 234, 0.1);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: all var(--transition-normal);
  background: white;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-purple);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.checkbox-group input[type="checkbox"] {
  width: auto;
  margin: 0;
}

.checkbox-group label {
  margin: 0;
  cursor: pointer;
}

/* ===== Footer ===== */
.footer {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 3rem 2rem 1rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: white;
}

.footer-section p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color var(--transition-normal);
}

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

.footer-social {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  text-decoration: none;
  transition: all var(--transition-normal);
  backdrop-filter: blur(10px);
}

.footer-social a:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  max-width: var(--container-max);
  margin: 0 auto;
}

.footer-links {
  display: flex;
  gap: 2rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-normal);
}

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

/* ===== Адаптивность ===== */
@media (max-width: 768px) {
  :root {
    --section-padding: 3rem;
  }
  
  .topbar {
    padding: 1rem;
  }
  
  #nav ul {
    display: none;
  }
  
  #burger {
    display: flex;
  }
  
  .hero {
    min-height: 80vh;
    padding: 4rem 1rem;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1.1rem;
  }
  
  .steps {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .tariffs {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .tariff.recommend {
    transform: none;
  }
  
  .tariff.recommend:hover {
    transform: translateY(-10px);
  }
  
  .social-grid {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-links {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .btn {
    padding: 1rem 2rem;
    font-size: 1rem;
  }
  
  .step {
    padding: 2rem 1.5rem;
  }
  
  .tariff {
    padding: 2rem 1.5rem;
  }
  
  .registration-form {
    padding: 2rem 1.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
}

/* ===== Анимации ===== */
@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);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

/* Анимации появления */
.fade-in-up {
  animation: fadeInUp 0.8s ease-out;
}

.fade-in-left {
  animation: fadeInLeft 0.8s ease-out;
}

.fade-in-right {
  animation: fadeInRight 0.8s ease-out;
}

/* Спецэффекты */
.pulse {
  animation: pulse 2s infinite;
}

.bounce {
  animation: bounce 1s infinite;
}

/* ===== Улучшения производительности ===== */
* {
  will-change: auto;
}

.btn, 
.social-card, 
.tariff, 
.step, 
.project-card,
.benefit,
.requirement,
.contact-item,
.testimonial,
.faq-item {
  will-change: transform;
}

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

/* ===== Высокие разрешения ===== */
@media (min-width: 1400px) {
  :root {
    --container-max: 1400px;
  }
}

@media (min-width: 1600px) {
  :root {
    --container-max: 1600px;
    --section-padding: 8rem;
  }
}

/* ===== Дополнительные утилиты ===== */
.text-center {
  text-align: center;
}

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

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* ===== Специальные состояния ===== */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* ===== Скролл бар ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--gradient-primary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gradient-secondary);
}