:root {
  /* Основная монохромная палитра - YPF бренд */
  --color-primary: #0063b0;
  --color-primary-dark: #004c8a;
  --color-primary-light: #1a7ac9;
  --color-secondary: #e1001a;
  --color-secondary-dark: #b30015;
  --color-secondary-light: #ff1a33;
  
  /* Монохромные оттенки */
  --color-dark: #222222;
  --color-gray-dark: #444444;
  --color-gray: #777777;
  --color-gray-light: #bbbbbb;
  --color-light: #f5f5f5;
  --color-white: #ffffff;
  
  /* Функциональные цвета */
  --color-success: #2ecc71;
  --color-warning: #f39c12;
  --color-error: #e74c3c;
  
  /* Параметры типографики */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Merriweather', serif;
  
  /* Размеры */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* Тени */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
  
  /* Скругления */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  /* Переходы */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Контейнер */
  --container-width: 1200px;
  --container-padding: 20px;
}

/* Базовые стили */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-dark);
  background-color: var(--color-white);
  margin: 0;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-top: 0;
  margin-bottom: var(--spacing-md);
  color: var(--color-dark);
}

h1 {
  font-size: 3rem;
}

h2 {
  font-size: 2.5rem;
}

h3 {
  font-size: 2rem;
}

h4 {
  font-size: 1.5rem;
}

h5 {
  font-size: 1.25rem;
}

h6 {
  font-size: 1rem;
}

p {
  margin-top: 0;
  margin-bottom: var(--spacing-md);
}

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

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

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

ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Контейнеры */
.container {
  max-width: var(--container-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Утилиты */
.text-center {
  text-align: center;
}

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

.text-white {
  color: var(--color-white);
}

.mb-0 {
  margin-bottom: 0;
}

.mb-1 {
  margin-bottom: var(--spacing-sm);
}

.mb-2 {
  margin-bottom: var(--spacing-md);
}

.mb-3 {
  margin-bottom: var(--spacing-lg);
}

.mb-4 {
  margin-bottom: var(--spacing-xl);
}

.mt-0 {
  margin-top: 0;
}

.mt-1 {
  margin-top: var(--spacing-sm);
}

.mt-2 {
  margin-top: var(--spacing-md);
}

.mt-3 {
  margin-top: var(--spacing-lg);
}

.mt-4 {
  margin-top: var(--spacing-xl);
}

/* Секции */
.section {
  padding: var(--spacing-xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  position: relative;
  padding-bottom: var(--spacing-md);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background-color: var(--color-secondary);
}

.section-description {
  text-align: center;
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
  color: var(--color-gray);
  font-size: 1.1rem;
}

/* Хедер */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-normal);
}

.header.scrolled {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(5px);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 50px;
  width: auto;
}

.main-nav {
  display: flex;
}

.nav-list {
  display: flex;
  align-items: center;
}

.nav-list li {
  margin-left: var(--spacing-lg);
}

.nav-list a {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-dark);
  transition: color var(--transition-fast);
}

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

.burger-menu {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 20px;
  cursor: pointer;
}

.burger-menu span {
  width: 100%;
  height: 2px;
  background-color: var(--color-dark);
  transition: all var(--transition-fast);
}

/* Герой */
.hero {
  position: relative;
  padding: 0;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  color: var(--color-white);
  z-index: 1;
  margin-top: 70px; /* Компенсация fixed header */
}

.hero-content {
  text-align: center;
  max-width: 900px;
  padding: var(--spacing-xl);
  z-index: 2;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  color: var(--color-white);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  transform: translateY(20px);
  opacity: 0;
  animation: fadeInUp 1s forwards 0.5s;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xl);
  color: var(--color-white);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  transform: translateY(20px);
  opacity: 0;
  animation: fadeInUp 1s forwards 0.7s;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  transform: translateY(20px);
  opacity: 0;
  animation: fadeInUp 1s forwards 0.9s;
}

.hero-stats {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-xl);
  transform: translateY(20px);
  opacity: 0;
  animation: fadeInUp 1s forwards 1.1s;
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  color: var(--color-white);
}

.stat-text {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-white);
}

/* Кнопки */
.btn {
  display: inline-block;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(-100%);
  transition: transform var(--transition-fast);
  z-index: -1;
}

.btn:hover::before {
  transform: translateX(0);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 10px rgba(0, 99, 176, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 99, 176, 0.4);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-white);
  border: 2px solid var(--color-white);
}

.btn-secondary:hover {
  background-color: var(--color-white);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

/* Методология */
.methodology {
  background-color: var(--color-light);
  position: relative;
  overflow: hidden;
}

.methodology-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.methodology-text {
  max-width: 800px;
  margin: 0 auto;
}

.methodology-image-container {
  text-align: center;
  margin-top: var(--spacing-xl);
}

.methodology-image-container img {
  max-width: 100%;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  transform: perspective(1000px) rotateX(5deg);
  transition: transform var(--transition-normal);
}

.methodology-image-container img:hover {
  transform: perspective(1000px) rotateX(0);
}

/* Таймлайн */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-lg) 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 100%;
  background-color: var(--color-primary);
}

.timeline-item {
  position: relative;
  padding: var(--spacing-md) 0;
  width: 50%;
  padding-right: var(--spacing-xl);
}

.timeline-item:nth-child(even) {
  margin-left: 50%;
  padding-right: 0;
  padding-left: var(--spacing-xl);
}

.timeline-dot {
  position: absolute;
  top: 50%;
  right: -10px;
  width: 20px;
  height: 20px;
  background-color: var(--color-primary);
  border-radius: 50%;
  transform: translateY(-50%);
  z-index: 2;
}

.timeline-item:nth-child(even) .timeline-dot {
  right: auto;
  left: -10px;
}

.timeline-content {
  background-color: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

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

.timeline-content h3 {
  margin-top: 0;
  color: var(--color-primary);
}

/* Партнеры */
.partners {
  background-color: var(--color-white);
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

/* Карточки */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

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

.card-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  position: relative;
}

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

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

.card-content {
  padding: var(--spacing-lg);
  flex-grow: 1;
  width: 100%;
}

.card-content h3 {
  font-size: 1.5rem;
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.card-content p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-gray-dark);
}

/* Ресурсы */
.resources {
  background-color: var(--color-light);
}

.resources-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.resources .card {
  background-color: var(--color-white);
  transition: transform var(--transition-normal);
}

.resources .card:hover {
  transform: translateY(-5px);
}

.resources .card-content a {
  color: var(--color-primary);
  font-weight: 600;
}

.resources .card-content a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

/* Пресса */
.press {
  background-color: var(--color-white);
}

.press-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.press .card-content p:first-of-type {
  color: var(--color-secondary);
  font-weight: 700;
  font-size: 0.9rem;
}

/* Портфолио */
.portfolio {
  background-color: var(--color-light);
  position: relative;
}

.portfolio-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
}

.filter-btn {
  background-color: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-weight: 600;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

/* Контакты */
.contact {
  background-color: var(--color-white);
}

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.contact-info {
  padding: var(--spacing-lg);
  background-color: var(--color-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.contact-info h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.info-item {
  display: flex;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.info-item svg {
  margin-right: var(--spacing-md);
  flex-shrink: 0;
}

.business-hours {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-gray-light);
}

.business-hours h4 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.business-hours p {
  margin-bottom: var(--spacing-xs);
}

.contact-form-container {
  padding: var(--spacing-lg);
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  margin-bottom: var(--spacing-xs);
  font-family: var(--font-heading);
  font-weight: 500;
  color: var(--color-gray-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(0, 99, 176, 0.2);
}

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

.footer-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-info p {
  color: var(--color-gray-light);
  margin-top: var(--spacing-md);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.footer-links-column h3 {
  color: var(--color-white);
  font-size: 1.2rem;
  margin-bottom: var(--spacing-md);
}

.footer-links-column ul {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-links-column ul li a {
  color: var(--color-gray-light);
  transition: color var(--transition-fast);
}

.footer-links-column ul li a:hover {
  color: var(--color-white);
}

.social-links li a {
  display: inline-block;
  color: var(--color-gray-light);
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.social-links li a:hover {
  color: var(--color-white);
  transform: translateX(5px);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--color-gray-light);
  font-size: 0.9rem;
}

/* Cookie Popup */
.cookie-popup {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: rgba(0, 0, 0, 0.85);
  color: var(--color-white);
  padding: var(--spacing-md);
  z-index: 9999;
  display: none;
}

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

.cookie-content p {
  margin: 0;
  padding-right: var(--spacing-md);
}

.cookie-btn {
  background-color: var(--color-secondary);
  color: var(--color-white);
  border: none;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-heading);
  font-weight: 600;
  transition: background-color var(--transition-fast);
}

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

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

.success-content {
  background-color: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  max-width: 600px;
  width: 100%;
}

.success-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  background-color: var(--color-success);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 2.5rem;
}

.success-title {
  color: var(--color-success);
  margin-bottom: var(--spacing-md);
}

/* Privacy & Terms Pages */
.page-content {
  padding-top: 100px;
  padding-bottom: var(--spacing-xl);
}

.page-title {
  margin-bottom: var(--spacing-xl);
  color: var(--color-primary);
}

.page-section {
  margin-bottom: var(--spacing-xl);
}

.page-section h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Адаптивный дизайн */
@media (max-width: 1024px) {
  :root {
    --container-padding: 15px;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  h2 {
    font-size: 2rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .footer-info {
    text-align: center;
    margin-bottom: var(--spacing-lg);
  }
  
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding: var(--spacing-lg) 0;
  }
  
  .hero {
    min-height: 500px;
  }
  
  .hero-content {
    padding: var(--spacing-lg);
  }
  
  .hero-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .contact-container {
    grid-template-columns: 1fr;
  }
  
  .footer-links {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .timeline-item {
    width: 100%;
    padding-right: 0;
    padding-left: var(--spacing-xl);
  }
  
  .timeline-item:nth-child(even) {
    margin-left: 0;
  }
  
  .timeline::before {
    left: 0;
  }
  
  .timeline-dot {
    left: -10px;
    right: auto;
  }
  
  .cookie-content {
    flex-direction: column;
    text-align: center;
  }
  
  .cookie-content p {
    padding-right: 0;
    margin-bottom: var(--spacing-sm);
  }
}

@media (max-width: 576px) {
  .hero-stats {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .burger-menu {
    display: flex;
  }
  
  .main-nav {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    height: 0;
    background-color: var(--color-white);
    overflow: hidden;
    transition: height var(--transition-normal);
    box-shadow: var(--shadow-md);
  }
  
  .main-nav.active {
    height: auto;
  }
  
  .nav-list {
    flex-direction: column;
    padding: var(--spacing-md) 0;
  }
  
  .nav-list li {
    margin: var(--spacing-xs) 0;
    width: 100%;
    text-align: center;
  }
  
  .portfolio-filters {
    flex-direction: column;
    align-items: center;
  }
}