:root {
  /* Триада цветовая схема */
  --primary-color: #4a6fdc;
  --primary-dark: #3a5eba;
  --primary-light: #6f8fe5;
  
  --secondary-color: #dc4a6f;
  --secondary-dark: #ba3a5e;
  --secondary-light: #e56f8f;
  
  --tertiary-color: #6fdc4a;
  --tertiary-dark: #5eba3a;
  --tertiary-light: #8fe56f;
  
  /* Нейтральные цвета */
  --dark: #212529;
  --light: #f8f9fa;
  --gray: #6c757d;
  --gray-light: #e9ecef;
  
  /* Типографика */
  --font-heading: 'Roboto', sans-serif;
  --font-body: 'Lato', sans-serif;
  
  /* Переходы */
  --transition-speed: 0.3s;
  --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Тени */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  
  /* Скругления */
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border-radius-sm: 4px;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

p {
  margin-bottom: 1.5rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-speed) var(--transition-ease);
}

a:hover {
  color: var(--primary-dark);
  text-decoration: none;
}

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

/* Утилиты */
.text-white {
  color: white !important;
}

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

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

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

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

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

/* Кнопки */
.btn {
  position: relative;
  overflow: hidden;
  transition: all var(--transition-speed) var(--transition-ease);
  font-weight: 500;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  font-size: 0.875rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}

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

.btn:active {
  transform: translateY(0);
}

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

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

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

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

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

.btn-tertiary:hover {
  background-color: var(--tertiary-dark);
  border-color: var(--tertiary-dark);
}

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

.btn-outline-light:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
}

.btn-lg {
  font-size: 1rem;
  padding: 0.75rem 1.5rem;
}

input[type='submit'] {
  transition: all var(--transition-speed) var(--transition-ease);
}

input[type='submit']:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

/* Навигация */
.header {
  transition: all var(--transition-speed) var(--transition-ease);
  box-shadow: var(--shadow);
  z-index: 1000;
}

.navbar {
  padding: 1rem 0;
}

.navbar-brand {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
}

.navbar-nav .nav-link {
  position: relative;
  padding: 0.5rem 1rem;
  font-weight: 500;
  transition: color var(--transition-speed) var(--transition-ease);
}

.navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0.5rem;
  background-color: var(--primary-color);
  transition: width var(--transition-speed) var(--transition-ease);
}

.navbar-nav .nav-link:hover::after {
  width: calc(100% - 1rem);
}

/* Hero Section */
.hero-section {
  position: relative;
  height: 100vh;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: white;
  padding-top: 80px;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.7));
  z-index: 0;
}

.hero-section .container {
  position: relative;
  z-index: 1;
}

.hero-section h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: 1.5rem;
  font-weight: 800;
}

.hero-section p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  margin-bottom: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* About Section */
.card {
  transition: transform var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease);
  border: none;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  height: 100%;
  display: flex;
  flex-direction: column;
}

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

.card-body {
  flex: 1;
  padding: 1.5rem;
}

.card-title {
  margin-bottom: 1rem;
  font-weight: 700;
}

.card-image {
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
  width: 100%;
}

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

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

/* Courses Section */
.card .list-unstyled {
  margin-bottom: 1.5rem;
}

.card .list-unstyled li {
  margin-bottom: 0.5rem;
}

/* Statistics Section */
.stat-card {
  background-color: rgba(255, 255, 255, 0.1);
  transition: transform var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease);
}

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

.stat-card h3 {
  color: var(--primary-light);
}

/* Innovation Section */
.image-container {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.icon-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  font-size: 1.5rem;
}

/* Insights Section */
.insight-card {
  transition: transform var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease);
  border-radius: var(--border-radius);
}

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

/* FAQ Section */
.accordion-item {
  border: none;
  margin-bottom: 1rem;
  border-radius: var(--border-radius) !important;
  overflow: hidden;
}

.accordion-button {
  font-weight: 600;
  padding: 1.25rem;
  background-color: var(--light);
  color: var(--dark);
  box-shadow: none !important;
}

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

.accordion-button:focus {
  box-shadow: none;
  border-color: rgba(0,0,0,.125);
}

.accordion-body {
  padding: 1.25rem;
  background-color: white;
}

/* Contact Section */
.contact-form {
  transition: transform var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease);
}

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

.form-control, .form-select {
  padding: 0.75rem;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--gray-light);
  transition: border-color var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease);
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.25rem rgba(74, 111, 220, 0.25);
}

.map-container {
  box-shadow: var(--shadow);
  border-radius: var(--border-radius);
}

/* Footer */
.footer {
  position: relative;
  background-color: var(--dark);
  color: white;
}

.footer a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-speed) var(--transition-ease);
}

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

.social-links a {
  display: inline-block;
  transition: transform var(--transition-speed) var(--transition-ease);
}

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

/* Cookie Consent */
.cookie-consent {
  background-color: rgba(33, 37, 41, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 -4px 10px rgba(0, 0, 0, 0.1);
}

/* Читать далее ссылки */
.btn-outline-primary {
  color: var(--primary-color);
  border-color: var(--primary-color);
  background-color: transparent;
}

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

/* Дополнительные страницы */
.success-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}

.success-icon {
  font-size: 5rem;
  color: var(--tertiary-color);
  margin-bottom: 2rem;
}

.privacy-page, .terms-page, .about-page {
  padding-top: 100px;
  padding-bottom: 3rem;
}

/* Адаптивность */
@media (max-width: 767.98px) {
  .hero-section {
    text-align: center;
    padding-top: 80px;
    height: auto;
    min-height: 100vh;
  }
  
  .card-image {
    height: 180px;
  }
  
  .stat-card {
    margin-bottom: 1rem;
  }
  
  .contact-form {
    margin-top: 2rem;
  }
}

@media (min-width: 768px) and (max-width: 991.98px) {
  .hero-section {
    height: auto;
    min-height: 100vh;
    padding-top: 100px;
    padding-bottom: 3rem;
  }
}

/* Анимации */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

[data-aos="fade-up"] {
  transform: translateY(30px);
  opacity: 0;
  transition: transform 0.8s var(--transition-ease), opacity 0.8s var(--transition-ease);
}

[data-aos="fade-up"].aos-animate {
  transform: translateY(0);
  opacity: 1;
}

[data-aos="fade-right"] {
  transform: translateX(-30px);
  opacity: 0;
  transition: transform 0.8s var(--transition-ease), opacity 0.8s var(--transition-ease);
}

[data-aos="fade-right"].aos-animate {
  transform: translateX(0);
  opacity: 1;
}

[data-aos="fade-left"] {
  transform: translateX(30px);
  opacity: 0;
  transition: transform 0.8s var(--transition-ease), opacity 0.8s var(--transition-ease);
}

[data-aos="fade-left"].aos-animate {
  transform: translateX(0);
  opacity: 1;
}

/* Дополнительные классы */
.rounded {
  border-radius: var(--border-radius) !important;
}

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

.overflow-hidden {
  overflow: hidden;
}

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

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

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

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

/* Дополнительные стили для страницы успешной отправки */
.success-page .btn {
  margin-top: 2rem;
}

/* Стили для страниц privacy и terms */
.policy-content {
  max-width: 800px;
  margin: 0 auto;
}

.policy-content h2 {
  margin-top: 2.5rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
}

.policy-content h3 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.policy-content p {
  margin-bottom: 1.5rem;
}

.policy-content ul {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.policy-content li {
  margin-bottom: 0.5rem;
}