/* ===============================
   CSS для Limacidae - Образовательная платформа нефтяной промышленности
   Автор: Claude.ai
   Версия: 1.0
   =============================== */

/* === ПЕРЕМЕННЫЕ === */
:root {
  /* Основная цветовая схема (раздельно-дополнительная) */
  --color-primary: #006bab; /* Основной синий */
  --color-primary-dark: #00548a;
  --color-primary-light: #3b96d2;
  
  --color-secondary: #d84315; /* Дополнительный оранжевый */
  --color-secondary-dark: #a23010;
  --color-secondary-light: #f07242;
  
  --color-accent: #10b981; /* Акцентный зеленый */
  --color-accent-dark: #0d9268;
  --color-accent-light: #34d399;

  /* Нейтральные цвета */
  --color-white: #ffffff;
  --color-black: #0f172a;
  --color-gray-100: #f8fafc;
  --color-gray-200: #e2e8f0;
  --color-gray-300: #cbd5e1;
  --color-gray-400: #94a3b8;
  --color-gray-500: #64748b;
  --color-gray-600: #475569;
  --color-gray-700: #334155;
  --color-gray-800: #1e293b;
  --color-gray-900: #0f172a;

  /* Фоны и тени */
  --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  --gradient-secondary: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
  --gradient-accent: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  --gradient-overlay: linear-gradient(rgba(15, 23, 42, 0.7), rgba(15, 23, 42, 0.3));
  
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);

  /* Размеры */
  --container-max-width: 1280px;
  --container-padding: 2rem;
  
  /* Скругления */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 2rem;
  --radius-full: 9999px;
  
  /* Переходы */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.65, 0.05, 0.36, 1);

  /* Z-индексы */
  --z-header: 100;
  --z-modal: 200;
}

/* === БАЗОВЫЕ СТИЛИ === */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: 80px; /* Для якорных ссылок - учитываем высоту header */
}

body {
  font-family: 'Rubik', sans-serif;
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-gray-700);
  background-color: var(--color-white);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--color-gray-900);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

p {
  margin-bottom: 1.5rem;
}

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

a:hover {
  color: var(--color-primary-dark);
}

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

ul, ol {
  list-style: none;
}

/* === УТИЛИТЫ === */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section-padding {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  position: relative;
  display: inline-block;
  margin-bottom: 1rem;
  font-size: 2.5rem;
}

.section-header h2:after {
  content: '';
  position: absolute;
  bottom: -0.75rem;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

.section-header p {
  font-size: 1.2rem;
  color: var(--color-gray-500);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* === КНОПКИ === */
.btn {
  display: inline-block;
  font-family: 'Manrope', sans-serif;
  font-weight: 600;
  padding: 0.8rem 1.8rem;
  border-radius: var(--radius-md);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  outline: none;
  text-decoration: none;
  font-size: 1rem;
  line-height: 1.5;
}

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

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

.btn-secondary {
  background: var(--gradient-secondary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

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

/* === ШАПКА === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: var(--z-header);
  background-color: var(--color-white);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.header-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-primary);
  text-decoration: none;
}

.logo h1 {
  font-size: inherit;
  margin: 0;
  transition: color var(--transition-normal);
}

.logo:hover h1 {
  color: var(--color-primary-dark);
}

/* Навигация */
.desktop-nav ul {
  display: flex;
  gap: 1.5rem;
}

.desktop-nav a {
  font-family: 'Manrope', sans-serif;
  font-weight: 500;
  color: var(--color-gray-700);
  transition: color var(--transition-normal);
  position: relative;
}

.desktop-nav a:after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-normal);
}

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

.desktop-nav a:hover:after {
  width: 100%;
}

/* Мобильное меню */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 20px;
  cursor: pointer;
}

.mobile-menu-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
}

.mobile-nav {
  position: fixed;
  top: 80px;
  left: 0;
  width: 100%;
  height: 0;
  background-color: var(--color-white);
  overflow: hidden;
  transition: height var(--transition-slow);
  box-shadow: var(--shadow-md);
  z-index: calc(var(--z-header) - 1);
}

.mobile-nav.active {
  height: calc(100vh - 80px);
}

.mobile-nav ul {
  padding: 2rem;
}

.mobile-nav li {
  margin-bottom: 1.5rem;
}

.mobile-nav a {
  font-family: 'Manrope', sans-serif;
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--color-gray-800);
  transition: color var(--transition-normal);
  display: block;
}

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

/* === HERO СЕКЦИЯ === */
.hero {
  position: relative;
  padding: 10rem 0 8rem;
  color: var(--color-white);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gradient-overlay);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  color: var(--color-white);
  font-size: 3rem;
  margin-bottom: 1.5rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  line-height: 1.2;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* === FEATURES СЕКЦИЯ === */
.features {
  position: relative;
  background-color: var(--color-gray-100);
  overflow: hidden;
}

.features::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: var(--gradient-primary);
  opacity: 0.05;
  border-radius: 50%;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  text-align: center;
  height: 100%;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: center;
}

.feature-card h3 {
  margin-bottom: 1rem;
  font-size: 1.5rem;
  color: var(--color-primary-dark);
}

.feature-card p {
  color: var(--color-gray-600);
  margin-bottom: 0;
}

/* === ИСТОРИЯ СЕКЦИЯ === */
.history {
  position: relative;
}

.history-timeline {
  position: relative;
  max-width: 1000px;
  margin: 0 auto;
}

.history-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

.timeline-item {
  display: flex;
  margin-bottom: 5rem;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline-year {
  min-width: 150px;
  text-align: center;
  font-family: 'Manrope', sans-serif;
  font-weight: 700;
  font-size: 2rem;
  color: var(--color-primary);
  position: relative;
  margin-top: 1rem;
}

.timeline-year::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  top: 10px;
}

.timeline-item:nth-child(odd) .timeline-year::after {
  left: -8px;
}

.timeline-item:nth-child(even) .timeline-year::after {
  right: -8px;
}

.timeline-content {
  flex: 1;
  padding: 2rem;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transform: perspective(1000px) rotateY(-2deg);
  transition: all var(--transition-normal);
  max-width: 65%;
}

.timeline-item:nth-child(odd) .timeline-content {
  transform: perspective(1000px) rotateY(2deg);
}

.timeline-content:hover {
  transform: perspective(1000px) rotateY(0);
  box-shadow: var(--shadow-lg);
}

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

.timeline-content img {
  width: 100%;
  border-radius: var(--radius-md);
  margin-top: 1.5rem;
  object-fit: cover;
  max-height: 250px;
}

/* === КУРСЫ СЕКЦИЯ === */
.courses {
  background-color: var(--color-gray-100);
  position: relative;
  overflow: hidden;
}

.courses::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 300px;
  height: 300px;
  background: var(--gradient-secondary);
  opacity: 0.05;
  border-radius: 50%;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.card-image {
  position: relative;
  height: 220px;
  overflow: hidden;
}

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

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

.news-date {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: 0.5rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.card-content {
  padding: 2rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.card-content h3 {
  color: var(--color-primary-dark);
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.course-details {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: auto;
  margin-bottom: 1.5rem;
  font-size: 0.9rem;
  color: var(--color-gray-500);
}

.read-more {
  display: inline-flex;
  align-items: center;
  font-weight: 500;
  color: var(--color-secondary);
  margin-top: auto;
  transition: all var(--transition-normal);
}

.read-more:hover {
  color: var(--color-secondary-dark);
  transform: translateX(5px);
}

/* === ИССЛЕДОВАНИЯ СЕКЦИЯ === */
.research {
  position: relative;
}

.research-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2rem;
  margin-bottom: 4rem;
}

.research-text {
  flex: 1;
  min-width: 300px;
}

.research-image {
  flex: 1;
  min-width: 300px;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.research-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.research-publications h3 {
  color: var(--color-primary-dark);
  margin-bottom: 2rem;
}

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

.publications-list li {
  padding: 1.5rem;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  height: 100%;
}

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

.publication-date {
  display: inline-block;
  background-color: var(--color-primary-light);
  color: var(--color-white);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.publications-list h4 {
  font-size: 1.1rem;
  color: var(--color-primary-dark);
  margin-bottom: 0.75rem;
}

.publications-list p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* === ВНЕШНИЕ РЕСУРСЫ СЕКЦИЯ === */
.external-resources {
  background-color: var(--color-gray-100);
}

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

.resource-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  text-align: center;
  height: 100%;
  color: var(--color-gray-700);
}

.resource-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  color: var(--color-gray-700);
}

.resource-icon {
  width: 100px;
  height: 100px;
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: center;
}

.resource-card h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
  color: var(--color-primary-dark);
}

.resource-card p {
  font-size: 0.95rem;
  color: var(--color-gray-600);
  margin-bottom: 0;
}

/* === ИСТОРИИ УСПЕХА === */
.success-stories {
  position: relative;
  overflow: hidden;
}

.success-stories::before {
  content: '';
  position: absolute;
  bottom: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: var(--gradient-accent);
  opacity: 0.05;
  border-radius: 50%;
}

.stories-slider {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
}

.story-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  flex: 1 1 100%;
  min-width: 300px;
  padding: 2rem;
}

@media (min-width: 768px) {
  .story-card {
    flex-direction: row;
    align-items: center;
    gap: 2rem;
  }
}

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

.story-image {
  flex-shrink: 0;
  width: 150px;
  height: 150px;
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: 0 auto 1.5rem;
}

@media (min-width: 768px) {
  .story-image {
    margin: 0;
  }
}

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

.story-content {
  flex-grow: 1;
}

.story-quote {
  font-style: italic;
  color: var(--color-gray-600);
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.story-quote::before {
  content: '"';
  position: absolute;
  left: 0;
  top: 0;
  font-size: 3rem;
  line-height: 1;
  color: var(--color-primary-light);
  opacity: 0.3;
}

.story-author h4 {
  margin-bottom: 0.25rem;
  font-size: 1.1rem;
  color: var(--color-primary-dark);
}

.story-author p {
  font-size: 0.9rem;
  color: var(--color-gray-500);
  margin-bottom: 0;
}

/* === FAQ СЕКЦИЯ === */
.faq {
  background-color: var(--color-gray-100);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

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

.faq-question {
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  background-color: var(--color-white);
  transition: all var(--transition-normal);
}

.faq-question h3 {
  font-size: 1.1rem;
  margin-bottom: 0;
  flex-grow: 1;
  padding-right: 1rem;
}

.faq-toggle {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  transition: transform var(--transition-normal);
}

.faq-question.active .faq-toggle {
  transform: rotate(45deg);
}

.faq-answer {
  height: 0;
  overflow: hidden;
  transition: height var(--transition-normal);
}

.faq-answer-inner {
  padding: 0 1.5rem 1.5rem;
}

.faq-answer p {
  margin-bottom: 0;
}

/* === СОБЫТИЯ СЕКЦИЯ === */
.events {
  position: relative;
}

.events-calendar {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.event-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

@media (min-width: 768px) {
  .event-card {
    flex-direction: row;
  }
}

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

.event-date {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
  background: var(--gradient-primary);
  color: var(--color-white);
  text-align: center;
  min-width: 150px;
}

.event-date .day {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.event-date .month {
  font-size: 1.25rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.event-date .year {
  font-size: 1rem;
  opacity: 0.8;
}

.event-details {
  padding: 2rem;
  flex-grow: 1;
}

.event-details h3 {
  color: var(--color-primary-dark);
  margin-bottom: 0.5rem;
}

.event-location {
  font-size: 0.9rem;
  color: var(--color-gray-500);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
}

.event-location .icon-location {
  margin-right: 0.5rem;
  display: inline-block;
  width: 16px;
  height: 16px;
  background-color: var(--color-gray-500);
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2C8.13 2 5 5.13 5 9c0 5.25 7 13 7 13s7-7.75 7-13c0-3.87-3.13-7-7-7zm0 9.5c-1.38 0-2.5-1.12-2.5-2.5s1.12-2.5 2.5-2.5 2.5 1.12 2.5 2.5-1.12 2.5-2.5 2.5z'/%3E%3C/svg%3E");
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2C8.13 2 5 5.13 5 9c0 5.25 7 13 7 13s7-7.75 7-13c0-3.87-3.13-7-7-7zm0 9.5c-1.38 0-2.5-1.12-2.5-2.5s1.12-2.5 2.5-2.5 2.5 1.12 2.5 2.5-1.12 2.5-2.5 2.5z'/%3E%3C/svg%3E");
  mask-size: cover;
  -webkit-mask-size: cover;
}

.event-details p {
  margin-bottom: 1.5rem;
}

/* === НОВОСТИ СЕКЦИЯ === */
.news {
  background-color: var(--color-gray-100);
}

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

/* === ПРОЕКТЫ СЕКЦИЯ === */
.projects {
  position: relative;
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

@media (min-width: 768px) {
  .project-card {
    flex-direction: row;
    align-items: center;
  }
  
  .project-card:nth-child(even) {
    flex-direction: row-reverse;
  }
}

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

.project-image {
  flex: 1;
  min-width: 250px;
  overflow: hidden;
}

.project-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

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

.project-content {
  flex: 1;
  padding: 2rem;
}

.project-content h3 {
  color: var(--color-primary-dark);
  margin-bottom: 1rem;
}

.project-content p {
  margin-bottom: 0;
}

/* === КОНТАКТ СЕКЦИЯ === */
.contact {
  position: relative;
  background-color: var(--color-gray-100);
}

.contact-content {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-bottom: 3rem;
}

.contact-info {
  flex: 1;
  min-width: 300px;
}

.info-item {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  border-left: 3px solid var(--color-primary);
}

.info-item h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary-dark);
}

.info-item p {
  margin-bottom: 0.25rem;
  color: var(--color-gray-600);
}

.contact-form {
  flex: 2;
  min-width: 300px;
}

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

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--color-gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: 'Rubik', sans-serif;
  font-size: 1rem;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 107, 171, 0.1);
}

.form-submit {
  position: relative;
}

.progress-bar {
  height: 3px;
  background-color: var(--color-primary);
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  transition: width var(--transition-slow);
}

.contact-map {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.contact-map img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

/* === FOOTER === */
.footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: 5rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-logo h2 {
  color: var(--color-white);
  font-size: 1.8rem;
  margin-bottom: 1rem;
}

.footer-logo p {
  font-size: 0.95rem;
  opacity: 0.8;
}

.footer-links h3 {
  color: var(--color-white);
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-links h3:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background-color: var(--color-primary);
}

.footer-links ul li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--color-gray-400);
  transition: color var(--transition-normal);
}

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

.social-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.social-links a {
  display: inline-block;
  padding: 0.5rem 0.75rem;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  color: var(--color-gray-300);
  text-decoration: none;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
}

.footer-bottom p {
  margin-bottom: 0.5rem;
  opacity: 0.7;
}

/* === МОДАЛЬНОЕ ОКНО === */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  max-width: 500px;
  width: 90%;
  position: relative;
  transform: scale(0.9);
  transition: transform var(--transition-normal);
  box-shadow: var(--shadow-xl);
}

.modal.active .modal-content {
  transform: scale(1);
}

.close-modal {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--color-gray-500);
  transition: color var(--transition-normal);
}

.close-modal:hover {
  color: var(--color-primary);
}

.modal-body {
  padding: 3rem 2rem;
  text-align: center;
}

.success-icon {
  color: var(--color-accent);
  margin-bottom: 1.5rem;
}

.modal-body h3 {
  margin-bottom: 1rem;
  color: var(--color-primary-dark);
}

.modal-body p {
  margin-bottom: 2rem;
}

/* === SUCCESS PAGE === */
.success-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  padding: 2rem;
}

.success-card {
  background-color: var(--color-white);
  padding: 3rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  max-width: 600px;
  width: 100%;
}

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

/* === TERMS & PRIVACY PAGES === */
.content-page {
  padding-top: 100px;
  padding-bottom: 5rem;
}

.content-container {
  max-width: 900px;
  margin: 0 auto;
}

.content-container h2 {
  margin-top: 3rem;
  margin-bottom: 1.5rem;
  color: var(--color-primary-dark);
}

.content-container h3 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--color-primary);
}

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

.content-container ul {
  list-style-type: disc;
  margin-left: 1.5rem;
  margin-bottom: 1.5rem;
}

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

/* === MEDIA QUERIES === */
@media screen and (max-width: 991px) {
  .container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
  
  .section-header h2 {
    font-size: 2.2rem;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .timeline-content {
    max-width: 80%;
  }
}

@media screen and (max-width: 767px) {
  .desktop-nav {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .section-padding {
    padding-top: 4rem;
    padding-bottom: 4rem;
  }
  
  .section-header {
    margin-bottom: 3rem;
  }
  
  .section-header h2 {
    font-size: 2rem;
  }
  
  .hero {
    padding: 8rem 0 6rem;
  }
  
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .hero p {
    font-size: 1.1rem;
  }
  
  .history-timeline::before {
    left: 30px;
  }
  
  .timeline-item {
    flex-direction: column !important;
    padding-left: 50px;
  }
  
  .timeline-year {
    text-align: left;
    margin-bottom: 1rem;
  }
  
  .timeline-year::after {
    left: -50px !important;
  }
  
  .timeline-content {
    max-width: 100%;
    transform: none !important;
  }
  
  .timeline-content:hover {
    transform: translateY(-5px) !important;
  }
}

@media screen and (max-width: 575px) {
  .section-header h2 {
    font-size: 1.8rem;
  }
  
  .section-header p {
    font-size: 1rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .btn {
    padding: 0.7rem 1.5rem;
    font-size: 0.95rem;
  }
  
  .publications-list {
    grid-template-columns: 1fr;
  }
  
  .info-item {
    padding-left: 1rem;
  }
}

/* === АНИМАЦИИ === */
@keyframes float {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
  100% {
    transform: translateY(0px);
  }
}

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

/* Эффекты AOS для плавных анимаций */
[data-aos="custom-fade-up"] {
  opacity: 0;
  transform: translateY(30px);
  transition-property: transform, opacity;
}

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

/* JavaScript зависимые стили */
.faq-question.active {
  background-color: var(--color-gray-100);
}

.form-progress.active .progress-bar {
  width: 100%;
}