:root {
  /* Основная цветовая схема (дополнительная) */
  --primary: #3a86ff;
  --primary-dark: #2a65cc;
  --primary-light: #61a0ff;
  --secondary: #ff9e3a;
  --secondary-dark: #e68a26;
  --secondary-light: #ffb566;
  
  /* Нейтральные цвета */
  --dark: #333333;
  --medium: #777777;
  --light: #f8f9fa;
  --white: #ffffff;
  
  /* Акцентные цвета */
  --accent-1: #4cc9f0;
  --accent-2: #f72585;
  --accent-3: #7209b7;
  
  /* Градиенты */
  --gradient-primary: linear-gradient(135deg, var(--primary), var(--primary-light));
  --gradient-secondary: linear-gradient(135deg, var(--secondary), var(--secondary-light));
  --gradient-accent: linear-gradient(135deg, var(--accent-1), var(--accent-3));
  
  /* Тени */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
  
  /* Переходы */
  --transition-fast: all 0.2s ease;
  --transition-normal: all 0.3s ease;
  --transition-slow: all 0.5s ease;
  
  /* Радиусы */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  /* Размеры шрифтов (адаптивная типографика) */
  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --font-size-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --font-size-2xl: clamp(1.5rem, 1.3rem + 1vw, 1.875rem);
  --font-size-3xl: clamp(1.875rem, 1.6rem + 1.375vw, 2.5rem);
  --font-size-4xl: clamp(2.25rem, 1.9rem + 1.75vw, 3.25rem);
  
  /* Межстрочный интервал */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-loose: 1.8;
  
  /* Отступы */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
}

/* Базовые стили */
html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Roboto', sans-serif;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--dark);
  background-color: var(--white);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6,
.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
  font-family: 'Archivo Black', sans-serif;
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-md);
  color: var(--dark);
  font-weight: 700;
}

.lead {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-loose);
  font-weight: 300;
}

/* Отступ для страниц privacy и terms */
.privacy-content, .terms-content {
  padding-top: 100px;
}

/* Header */
header {
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  z-index: 1000;
}

header.scrolled {
  background-color: var(--white) !important;
  box-shadow: var(--shadow-lg);
}

.navbar {
  padding: 15px 0;
  transition: var(--transition-normal);
}

.navbar-brand {
  font-family: 'Archivo Black', sans-serif;
  font-size: var(--font-size-xl);
  color: var(--primary);
  transition: var(--transition-normal);
}

.navbar-brand:hover {
  color: var(--primary-dark);
  transform: scale(1.03);
}

.brand-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 700;
}

.nav-link {
  font-weight: 500;
  color: var(--dark);
  padding: 10px 15px;
  margin: 0 5px;
  position: relative;
  transition: var(--transition-normal);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background-color: var(--primary);
  transition: var(--transition-normal);
  transform: translateX(-50%);
}

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

.nav-link:hover::after {
  width: 50%;
}

.navbar-toggler {
  border: none;
  padding: 0.5rem;
}

.navbar-toggler:focus {
  box-shadow: none;
}

@media (max-width: 991.98px) {
  .navbar-nav {
    margin-top: 15px;
  }
  
  .nav-link {
    text-align: center;
    padding: 10px 0;
  }
  
  .nav-link::after {
    display: none;
  }
}

/* Кнопки */
.btn {
  font-weight: 500;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.2);
  transition: var(--transition-normal);
  transform: skewX(-30deg);
}

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

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

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

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

.btn-outline-primary:hover, .btn-outline-primary:focus {
  background-color: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover, .btn-secondary:focus {
  background-color: var(--secondary-dark);
  border-color: var(--secondary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline-light {
  color: var(--white);
  border-color: var(--white);
}

.btn-outline-light:hover, .btn-outline-light:focus {
  background-color: var(--white);
  border-color: var(--white);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-lg {
  padding: 0.75rem 1.75rem;
  font-size: var(--font-size-base);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: var(--white);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  padding: 120px 0;
  display: flex;
  align-items: center;
}

.hero h1 {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-lg);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s forwards 0.3s;
}

.hero p {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-xl);
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s forwards 0.6s;
}

.hero .btn {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s forwards 0.9s;
}

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

/* About Us Section */
.image-container {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: translateY(0);
  transition: var(--transition-normal);
}

.image-container:hover {
  transform: translateY(-10px);
}

.image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-normal);
}

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

/* Mission Section */
.accordion-button {
  font-weight: 500;
}

.accordion-button:not(.collapsed) {
  background-color: var(--primary-light);
  color: var(--white);
}

.accordion-button:focus {
  box-shadow: none;
  border-color: var(--primary-light);
}

/* Workshops Section */
.card {
  border: none;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
}

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

.card-image {
  height: 350px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-normal);
}

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

.card-title {
  color: var(--dark);
  font-weight: 700;
}

.card-body {
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-text {
  color: var(--medium);
  margin-bottom: auto;
}

.badge {
  padding: 0.5rem 1rem;
  font-weight: 500;
  letter-spacing: 0.5px;
}

/* Case Studies Section */
.timeline-marker {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--primary);
  position: relative;
}

.timeline-marker::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  transform: translate(-50%, -50%);
}

/* Events Calendar Section */
.timeline {
  position: relative;
  padding: var(--spacing-lg) 0;
}



@media (max-width: 991.98px) {
  .timeline::before {
    left: 0;
  }
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-2xl);
}

.timeline-date {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  background-color: var(--light);
  transition: var(--transition-normal);
}

.timeline-item:hover .timeline-date {
  background-color: var(--primary-light);
  color: var(--white);
}

.timeline-date h4 {
  margin-bottom: var(--spacing-xs);
  font-weight: 700;
}

.timeline-date p {
  margin-bottom: 0;
}

/* Media Section */
.play-video-btn {
  border-radius: 50px;
  padding: 0.75rem 2rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  transition: var(--transition-normal);
}

.play-video-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 15px 25px rgba(0, 0, 0, 0.2);
}

/* Contact Section */
.contact-info h3, .contact-info h4 {
  color: var(--primary);
}

.contact-info p {
  color: var(--medium);
}

.social-media a {
  color: var(--primary);
  font-weight: 500;
  transition: var(--transition-normal);
}

.social-media a:hover {
  color: var(--secondary);
  text-decoration: none;
}

.form-control, .form-select {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid #ced4da;
  transition: var(--transition-normal);
}

.form-control:focus, .form-select:focus {
  box-shadow: 0 0 0 3px rgba(58, 134, 255, 0.2);
  border-color: var(--primary);
}

/* Footer */
.footer {
  background-color: var(--dark);
  color: var(--white);
  padding: var(--spacing-2xl) 0;
}

.footer h4 {
  color: var(--white);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-lg);
}

.footer ul {
  padding-left: 0;
}

.footer a {
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition-normal);
}

.footer a:hover {
  color: var(--white);
  text-decoration: none;
}

/* Success Page */
.success-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-xl);
}

.success-content {
  max-width: 600px;
  margin: 0 auto;
}

.success-icon {
  font-size: 5rem;
  color: var(--primary);
  margin-bottom: var(--spacing-lg);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--primary-light);
  border-radius: 10px;
}

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

/* Animation utilities */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Responsive adjustments */
@media (max-width: 767.98px) {
  .hero {
    padding: 80px 0;
    min-height: auto;
  }
  
  .card-image {
    height: 180px;
  }
  
  .timeline::before {
    left: 20px;
  }
  
  .timeline-date {
    text-align: left !important;
    margin-bottom: var(--spacing-md);
  }
}

/* Scroll-dependent animations */
.scroll-animation {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-animation.visible {
  opacity: 1;
  transform: translateY(0);
}

.scroll-animation-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-animation-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.scroll-animation-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-animation-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Utility classes */
.text-primary {
  color: var(--primary) !important;
}

.text-secondary {
  color: var(--secondary) !important;
}

.bg-primary {
  background-color: var(--primary) !important;
}

.bg-secondary {
  background-color: var(--secondary) !important;
}

.object-fit-cover {
  object-fit: cover;
}

.object-fit-contain {
  object-fit: contain;
}

.glassmorphism {
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.shadow-hover {
  transition: var(--transition-normal);
}

.shadow-hover:hover {
  box-shadow: var(--shadow-lg);
}

/* Progressive image loading */
.progressive-image {
  position: relative;
  overflow: hidden;
}

.progressive-image img {
  transition: filter 0.5s;
}

.progressive-image img.loading {
  filter: blur(10px);
}