:root {
  --primary: #0056b3;
  --secondary: #ffc107;
  --accent: #dc3545;
  --light: #f8f9fa;
  --dark: #343a40;
  --success: #28a745;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  background-color: #f5f7fa;
  color: #333;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

/* Header Styles */
header {
  background: linear-gradient(rgba(0, 50, 120, 0.95), rgba(0, 50, 120, 0.98));
  color: white;
  padding: 12px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.15);
  backdrop-filter: blur(5px);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  font-size: 1.2rem;
  font-weight: 700;
}

.logo i {
  margin-right: 8px;
  color: var(--secondary);
  font-size: 1.4rem;
}

.contact-info {
  text-align: right;
  display: flex;
  align-items: center;
  gap: 10px;
}

.phone {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0;
}

.phone a {
  color: white;
  text-decoration: none;
  transition: all 0.3s;
  white-space: nowrap;
}

.phone a:hover {
  color: var(--secondary);
}

.callback-btn {
  background-color: var(--secondary);
  color: var(--dark);
  border: none;
  padding: 8px 12px;
  border-radius: 5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 0.9rem;
  white-space: nowrap;
}

.callback-btn:hover {
  background-color: #e0a800;
  transform: translateY(-2px);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 5px;
}

/* Hero Section */
.hero {
  background: linear-gradient(rgba(0, 50, 120, 0.85), rgba(0, 50, 120, 0.9)), url('https://nn-transfer.ru/img/ven.jpg');
  background-size: cover;
  background-position: center;
  color: white;
  text-align: center;
  padding: 70px 15px;
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
}

.hero-content {
  max-width: 1000px;
  margin: 0 auto;
  width: 100%;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 25px;
  text-shadow: 2px 2px 5px rgba(0,0,0,0.5);
  line-height: 1.2;
}

.hero h1 .city {
  color: var(--secondary);
  font-weight: 800;
  display: block;
  font-size: 3rem;
}

.hero p {
  font-size: 1.3rem;
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.cta-button {
  background-color: var(--secondary);
  color: var(--dark);
  padding: 16px 35px;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
  display: inline-block;
  text-decoration: none;
  min-width: 250px;
  max-width: 100%;
}

.cta-button:hover {
  background-color: #ffca28;
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

/* Features Section */
.features {
  padding: 60px 0;
  background-color: white;
}

.section-title {
  text-align: center;
  font-size: 1.8rem;
  margin-bottom: 40px;
  color: var(--primary);
  position: relative;
  padding: 0 15px;
}

.section-title:after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--secondary);
  border-radius: 2px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.feature-card {
  background: white;
  border-radius: 10px;
  padding: 25px 20px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: all 0.3s ease;
  border: 1px solid rgba(0,0,0,0.05);
  height: 100%;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.feature-icon {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 15px;
}

.feature-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
  color: var(--dark);
}

/* Regions Section */
.regions-section {
  padding: 60px 0;
  background-color: #f0f5ff;
}

.regions-container {
  max-width: 1000px;
  margin: 0 auto;
}

.regions-filter {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 30px;
}

.filter-btn {
  background-color: white;
  border: 2px solid #ddd;
  padding: 10px 20px;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 0.95rem;
}

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

.regions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 25px;
}

.region-card {
  background: white;
  border-radius: 10px;
  padding: 25px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.region-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.15);
  border-color: var(--primary);
}

.region-header {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 2px solid #f0f5ff;
}

.region-icon {
  font-size: 2rem;
  color: var(--primary);
  margin-right: 15px;
  width: 50px;
  text-align: center;
}

.region-title {
  font-size: 1.4rem;
  color: var(--dark);
  margin: 0;
}

.oblast-list {
  margin-bottom: 20px;
}

.oblast-item {
  margin-bottom: 15px;
}

.oblast-title {
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 10px;
  padding-bottom: 5px;
  border-bottom: 1px dashed #e0e0e0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.oblast-title:after {
  content: '+';
  font-size: 1.2rem;
  transition: transform 0.3s;
}

.oblast-title.active:after {
  content: '−';
}

.cities-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 8px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  margin-top: 0;
}

.cities-list.active {
  max-height: 500px;
  margin-top: 10px;
}

.city-link {
  display: block;
  padding: 8px 12px;
  background-color: #f8f9fa;
  border-radius: 5px;
  text-decoration: none;
  color: #333;
  font-size: 0.9rem;
  text-align: center;
  transition: all 0.3s;
  border: 1px solid #eaeaea;
}

.city-link:hover {
  background-color: var(--primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 3px 8px rgba(0,0,0,0.1);
}

/* Popular Routes */
.popular-routes {
  padding: 60px 0;
  background-color: white;
}

.routes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.route-card {
  background: white;
  border-radius: 10px;
  padding: 25px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.route-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  border-color: var(--secondary);
}

.route-icon {
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: 15px;
}

.route-card h3 {
  font-size: 1.3rem;
  margin-bottom: 10px;
  color: var(--dark);
}

.route-price {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  margin: 15px 0;
}

.route-price span {
  font-size: 1rem;
  color: #666;
  display: block;
  font-weight: normal;
  margin-top: 5px;
}

/* Calculator */
.calculator-section {
  padding: 60px 0;
  background-color: #f0f5ff;
}

.calculator {
  background: white;
  border-radius: 15px;
  padding: 40px;
  max-width: 800px;
  margin: 0 auto;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.calculator h3 {
  text-align: center;
  margin-bottom: 30px;
  color: var(--primary);
  font-size: 1.6rem;
}

.calculator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 30px;
}

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

.calc-group label {
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--dark);
}

.calc-input, .calc-select {
  padding: 12px 15px;
  border: 2px solid #ddd;
  border-radius: 8px;
  font-size: 1rem;
  transition: all 0.3s;
}

.calc-input:focus, .calc-select:focus {
  outline: none;
  border-color: var(--primary);
}

.calc-result {
  background-color: #f8f9fa;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  margin-top: 20px;
}

.calc-price {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  margin: 10px 0;
}

.calc-note {
  font-size: 0.9rem;
  color: #666;
  margin-top: 10px;
}

/* SEO Content Section */
.seo-content {
  padding: 50px 0;
  background-color: white;
}

.seo-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 15px;
}

.seo-container h2 {
  font-size: 1.6rem;
  color: var(--primary);
  margin-bottom: 20px;
  line-height: 1.3;
}

.seo-container h3 {
  font-size: 1.3rem;
  margin: 20px 0 15px;
  color: #0056b3;
  line-height: 1.3;
}

.seo-container p {
  margin-bottom: 15px;
  line-height: 1.6;
  font-size: 1rem;
}

.seo-container ul {
  padding-left: 20px;
  margin-bottom: 20px;
}

.seo-container li {
  margin-bottom: 10px;
  line-height: 1.5;
  font-size: 1rem;
}

.seo-tip {
  background: #e3f2fd;
  padding: 20px;
  border-radius: 8px;
  margin: 25px 0;
  border-left: 4px solid var(--primary);
}

/* CTA Section */
.cta-section {
  padding: 60px 0;
  background-color: white;
  text-align: center;
}

.cta-box {
  background: linear-gradient(135deg, #ffc107 0%, #ffca28 100%);
  border-radius: 15px;
  padding: 40px 25px;
  max-width: 800px;
  margin: 0 auto;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.cta-box h2 {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--dark);
  line-height: 1.3;
}

.cta-box p {
  font-size: 1.1rem;
  margin-bottom: 30px;
  color: #333;
  line-height: 1.5;
}

/* Footer */
footer {
  background-color: var(--dark);
  color: white;
  padding: 40px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.footer-column h3 {
  font-size: 1.3rem;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-column h3:after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background-color: var(--secondary);
}

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

.footer-column ul li {
  margin-bottom: 12px;
  font-size: 1rem;
}

.footer-column ul li a {
  color: #ddd;
  text-decoration: none;
  transition: all 0.3s;
  display: inline-block;
}

.footer-column ul li a:hover {
  color: var(--secondary);
  padding-left: 5px;
}

.footer-column ul li i {
  margin-right: 10px;
  width: 20px;
  text-align: center;
  color: var(--secondary);
}

.copyright {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: #aaa;
  font-size: 0.9rem;
  line-height: 1.5;
}

/* WhatsApp Button */
.whatsapp-button {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: #25D366;
  color: white;
  width: 70px;
  height: 70px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  box-shadow: 0 8px 25px rgba(0,0,0,0.2);
  z-index: 999;
  text-decoration: none;
  transition: all 0.3s;
}

.whatsapp-button:hover {
  background-color: #128C7E;
  transform: scale(1.15);
  box-shadow: 0 12px 30px rgba(0,0,0,0.3);
}

/* Mobile Navigation */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 280px;
  background: white;
  z-index: 1001;
  box-shadow: -5px 0 15px rgba(0,0,0,0.1);
  transform: translateX(100%);
  transition: transform 0.3s ease;
  padding: 80px 20px 20px;
  overflow-y: auto;
}

.mobile-nav.active {
  display: block;	
  transform: translateX(0);
}

.mobile-nav ul {
  list-style: none;
}

.mobile-nav ul li {
  margin-bottom: 15px;
}

.mobile-nav ul li a {
  color: var(--dark);
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 500;
  display: block;
  padding: 12px 0;
  border-bottom: 1px solid #eee;
}

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

.mobile-nav-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--dark);
  cursor: pointer;
}

.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
}

.overlay.active {
  display: block;
}

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

.feature-card, .region-card, .route-card {
  animation: fadeIn 0.5s ease forwards;
}

/* Responsive Design */
@media (max-width: 992px) {
  .regions-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
  
  .calculator-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .header-container {
    flex-wrap: wrap;
  }
  
  .mobile-menu-btn {
    display: block;
    order: 2;
  }
  
  .logo {
    order: 1;
    flex: 1;
  }
  
  .contact-info {
    order: 3;
    width: 100%;
    margin-top: 15px;
    justify-content: space-between;
    display: none;
  }
  
  .contact-info.mobile-visible {
    display: flex;
  }
  
  .hero {
    padding: 40px 15px;
    min-height: 60vh;
  }
  
  .hero h1 {
    font-size: 1.6rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .cta-button {
    padding: 14px 30px;
    font-size: 1rem;
    min-width: 220px;
  }
  
  .features, .regions-section, .popular-routes, .calculator-section, .seo-content, .cta-section {
    padding: 40px 0;
  }
  
  .features-grid, .routes-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  
  .regions-grid {
    grid-template-columns: 1fr;
  }
  
  .region-card {
    padding: 20px;
  }
  
  .calculator {
    padding: 30px 20px;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: 25px;
  }
  
  .cta-box {
    padding: 30px 20px;
  }
  
  .cta-box h2 {
    font-size: 1.5rem;
  }
  
  .cta-box p {
    font-size: 1rem;
  }
  
  .whatsapp-button {
    width: 55px;
    height: 55px;
    font-size: 1.8rem;
    bottom: 15px;
    right: 15px;
  }
  
  .cities-list {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 10px;
  }
  
  .logo {
    font-size: 1.1rem;
  }
  
  .phone {
    font-size: 1rem;
  }
  
  .callback-btn {
    padding: 7px 10px;
    font-size: 0.85rem;
  }
  
  .hero h1 {
    font-size: 1.4rem;
  }
  
  .section-title {
    font-size: 1.4rem;
    margin-bottom: 30px;
  }
  
  .feature-card, .region-card, .route-card {
    padding: 20px 15px;
  }
  
  .region-header {
    flex-direction: column;
    text-align: center;
  }
  
  .region-icon {
    margin-right: 0;
    margin-bottom: 10px;
  }
  
  .cities-list {
    grid-template-columns: 1fr 1fr;
  }
  
  .city-link {
    padding: 6px 8px;
    font-size: 0.85rem;
  }
  
  .filter-btn {
    padding: 8px 15px;
    font-size: 0.85rem;
  }
  
  .seo-container h2 {
    font-size: 1.4rem;
  }
  
  .seo-container h3 {
    font-size: 1.2rem;
  }
  
  .footer-column h3 {
    font-size: 1.1rem;
  }
  
  .mobile-nav {
    width: 100%;
  }
}

@media (max-width: 360px) {
  .hero h1 {
    font-size: 1.3rem;
  }
  
  .cta-button {
    min-width: 200px;
    padding: 12px 25px;
  }
  
  .cities-list {
    grid-template-columns: 1fr;
  }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  .feature-card:hover, .region-card:hover, .route-card:hover, .cta-button:hover {
    transform: none;
  }
  
  .feature-card:active, .region-card:active, .route-card:active {
    transform: scale(0.98);
  }
  
  .cta-button:active {
    transform: scale(0.98);
  }
  
  .city-link {
    padding: 10px 12px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* Print styles */
@media print {
  .whatsapp-button, .mobile-menu-btn, .callback-btn {
    display: none !important;
  }
  
  .hero {
    background: #0056b3 !important;
    color: black !important;
  }
  
  .cta-button {
    border: 1px solid #333 !important;
    color: #333 !important;
    background: none !important;
  }
}