/* Modern Design System - Combo-Pro v2.0 */
:root {
  /* Цветовая палитра */
  --primary: #1480cd;
  --primary-dark: #0d6cb7;
  --primary-light: #e3f2fd;
  --secondary: #667eea;
  --accent: #764ba2;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --dark: #1f2937;
  --light: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Z-index слои */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  /* Breakpoints */
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;
  --breakpoint-xxl: 1400px;

  /* Тени */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Скругления */
  --radius-sm: 0.375rem;
  --radius: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-full: 9999px;

  /* Анимации */
  --transition-fast: 150ms ease;
  --transition: 300ms ease;
  --transition-slow: 500ms ease;
}

/* Плавный скролл */
html {
  scroll-behavior: smooth;
}

/* Базовые стили */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: var(--light);
  color: var(--gray-800);
  line-height: 1.6;
  overflow-x: hidden;
  font-family: var(--font-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Стили для загрузки */
body:not(.dom-loaded) {
  opacity: 0;
}

body.dom-loaded {
  opacity: 1;
  transition: opacity 0.3s ease-in;
}

main {
  flex: 1;
}

/* Навигация */
.navbar {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  padding: 1rem 0;
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.navbar-brand {
  font-weight: 700;
  color: var(--primary) !important;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: all var(--transition);
}

.navbar-brand img {
  transition: transform var(--transition);
}

.navbar-brand:hover img {
  transform: rotate(-5deg) scale(1.1);
}

.nav-link {
  font-weight: 500;
  color: var(--gray-700) !important;
  padding: 0.75rem 1.25rem !important;
  border-radius: var(--radius);
  transition: all var(--transition);
  position: relative;
  margin: 0 0.25rem;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: all var(--transition);
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary) !important;
  background: var(--primary-light);
}

/* Dropdown */
.dropdown-menu {
  border: none;
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  margin-top: 0.5rem;
  animation: slideDown 0.2s ease;
  z-index: var(--z-dropdown);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.dropdown-item {
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-weight: 500;
}

.dropdown-item:hover {
  background: linear-gradient(135deg, var(--primary-light), #e0f2ff);
  color: var(--primary);
  transform: translateX(5px);
}

/* Карусель */
.hero-carousel-section {
  background: linear-gradient(135deg, #f8fafc 0%, #e3f2fd 100%);
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.hero-carousel-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.carousel-item {
  min-height: 500px;
  padding: 2rem 0;
}

.carousel-content {
  padding: 2rem;
}

.carousel-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.carousel-content .lead-text {
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--gray-600);
  margin-bottom: 2rem;
}

.carousel-control-prev,
.carousel-control-next {
  width: 50px;
  height: 50px;
  background: var(--primary);
  border-radius: 50%;
  top: 50%;
  transform: translateY(-50%);
  opacity: 0.8;
  transition: all var(--transition);
}

.carousel-control-prev {
  left: 30px;
}

.carousel-control-next {
  right: 30px;
}

.carousel-control-prev:hover,
.carousel-control-next:hover {
  opacity: 1;
  background: var(--primary-dark);
  transform: translateY(-50%) scale(1.1);
}

.carousel-indicators {
  bottom: 20px;
}

.carousel-indicators button {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--gray-400);
  margin: 0 8px;
  border: none;
  transition: all var(--transition);
}

.carousel-indicators button.active {
  background-color: var(--primary);
  transform: scale(1.2);
}

/* Company Section */
.company-section {
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  position: relative;
}

.company-section .card {
  border: none;
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.feature-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-light), #e0f2ff);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--primary);
  transition: all var(--transition);
}

.feature-icon svg {
  transition: transform var(--transition);
}

.company-section .card:hover .feature-icon {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  transform: rotate(10deg);
}

.company-section .card:hover .feature-icon svg {
  transform: scale(1.1);
}

/* Products Section */
.products-section {
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  position: relative;
}

.section-title {
  position: relative;
  display: inline-block;
  margin-bottom: 3rem;
  padding-bottom: 1rem;
}

.section-title::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
}

/* Cards */
.card {
  background: var(--light);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  position: relative;
  will-change: transform;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary);
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover::before {
  opacity: 1;
}

.card-img-top {
  height: 220px;
  object-fit: contain;
  padding: 1rem;
  transition: transform var(--transition-slow);
}

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

/* Accordion */
.accordion {
  --bs-accordion-border-color: transparent;
  --bs-accordion-border-radius: var(--radius-lg);
  --bs-accordion-inner-border-radius: calc(var(--radius-lg) - 1px);
  --bs-accordion-btn-padding-x: 1.5rem;
  --bs-accordion-btn-padding-y: 1.25rem;
  --bs-accordion-btn-color: var(--gray-900);
  --bs-accordion-btn-bg: var(--gray-50);
  --bs-accordion-btn-focus-border-color: var(--primary);
  --bs-accordion-btn-focus-box-shadow: 0 0 0 0.25rem rgba(20, 128, 205, 0.15);
  --bs-accordion-active-color: var(--primary);
  --bs-accordion-active-bg: var(--primary-light);
}

.accordion-button {
  font-weight: 600;
  font-size: 1.1rem;
  border-radius: var(--radius-lg) !important;
}

.accordion-button:not(.collapsed) {
  box-shadow: var(--shadow-md);
}

.accordion-body {
  padding: 1.5rem;
  background: var(--light);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* List Group */
.list-group-numbered {
  counter-reset: item;
}

.list-group-numbered li {
  counter-increment: item;
  padding-left: 2.5rem;
  position: relative;
  margin-bottom: 1rem;
  border: none;
  background: transparent;
  padding: 1rem 1.5rem 1rem 2.5rem;
  border-radius: var(--radius);
  transition: all var(--transition);
}

.list-group-numbered li:hover {
  background: var(--gray-50);
  transform: translateX(5px);
}

.list-group-numbered li::before {
  content: counter(item) ".";
  position: absolute;
  left: 0.5rem;
  top: 50%;
  transform: translateY(-50%);
  width: 2rem;
  height: 2rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 0.875rem;
}

/* Documentation Section */
.documentation-section {
  background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
}

.icon-wrapper {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-light), #e0f2ff);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
  color: var(--primary);
  transition: all var(--transition);
}

.icon-wrapper svg {
  transition: transform var(--transition);
}

.card:hover .icon-wrapper {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  transform: rotate(10deg);
}

.card:hover .icon-wrapper svg {
  transform: scale(1.1);
}

/* Buttons */
.btn {
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.6s ease;
  z-index: -1;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border: none;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-lg {
  padding: 1rem 2.25rem;
  font-size: 1.1rem;
  border-radius: var(--radius-md);
}

/* Contacts Section */
.contacts-section {
  background: linear-gradient(135deg, #f8fafc 0%, #e3f2fd 100%);
}

.contacts-section .card {
  transition: all var(--transition);
  border: 1px solid var(--gray-200);
}

.contacts-section .card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--primary);
}

.contacts-section a {
  color: var(--gray-800);
  text-decoration: none;
  transition: color var(--transition);
}

.contacts-section a:hover {
  color: var(--primary);
}

.map-container {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-top: 2rem;
}

/* Support Section */
.support-section {
  background: linear-gradient(135deg, #e3f2fd 0%, #dbeafe 100%);
  position: relative;
}

.support-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
      circle at 20% 80%,
      rgba(20, 128, 205, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(102, 126, 234, 0.1) 0%,
      transparent 50%
    );
  pointer-events: none;
}

/* Footer */
.footer {
  background: linear-gradient(135deg, var(--gray-900), #1a202c);
  color: var(--gray-300);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.footer a {
  color: var(--gray-300);
  text-decoration: none;
  transition: color var(--transition);
  position: relative;
}

.footer a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--primary);
  transition: width var(--transition);
}

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

.footer a:hover::after {
  width: 100%;
}

/* Анимации */
.fade-in {
  animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 992px) {
  .carousel-content h1 {
    font-size: 2rem;
  }

  .carousel-content .lead-text {
    font-size: 1.1rem;
  }

  .carousel-control-prev,
  .carousel-control-next {
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 768px) {
  .navbar-nav {
    padding: 1rem 0;
  }

  .nav-link {
    margin: 0.25rem 0;
  }

  .hero-carousel-section {
    padding: 3rem 0;
  }

  .carousel-item {
    min-height: 400px;
    padding: 1rem 0;
  }

  .carousel-content {
    padding: 1rem;
    text-align: center;
  }

  .carousel-content h1 {
    font-size: 1.75rem;
  }

  .carousel-control-prev {
    left: 10px;
  }

  .carousel-control-next {
    right: 10px;
  }

  .card-img-top {
    height: 200px;
  }

  .section-title {
    margin-bottom: 2rem;
  }

  .icon-wrapper {
    width: 60px;
    height: 60px;
  }

  .d-flex.gap-3 {
    flex-direction: column;
    gap: 1rem !important;
  }
}

@media (max-width: 576px) {
  .navbar-brand {
    font-size: 1.1rem;
  }

  .hero-carousel-section {
    padding: 2rem 0;
  }

  .carousel-item {
    min-height: 350px;
  }

  .carousel-content h1 {
    font-size: 1.5rem;
  }

  .card {
    margin-bottom: 1.5rem;
  }

  .btn {
    width: 100%;
    margin-bottom: 0.75rem;
  }
}

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

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(135deg, var(--primary-dark), #5a6fdb);
}

/* Print Styles */
@media print {
  .no-print,
  .navbar,
  .btn,
  .carousel-control-prev,
  .carousel-control-next,
  .carousel-indicators,
  .card::before,
  .card:hover .card-img-top {
    display: none !important;
  }

  .card {
    box-shadow: none !important;
    border: 1px solid var(--gray-300) !important;
    break-inside: avoid;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
    color: #000;
  }

  .text-gradient {
    background: none !important;
    color: #000 !important;
    -webkit-text-fill-color: #000 !important;
  }

  a {
    color: #000 !important;
    text-decoration: none !important;
  }

  a[href]:after {
    content: " (" attr(href) ")";
    font-size: 90%;
  }

  .card-img-top {
    max-height: 150px !important;
  }
}

/* CTA Section */
.cta-section {
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
      circle at 20% 80%,
      rgba(255, 255, 255, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 20%,
      rgba(255, 255, 255, 0.1) 0%,
      transparent 50%
    );
}

/* Button Outline Light */
.btn-outline-light {
  border: 2px solid rgba(255, 255, 255, 0.5);
  color: white;
  background: transparent;
}

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

/* Loading overlay */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--light);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  transition: opacity 0.3s ease;
}

.loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Стили для lazy loading изображений */
img[data-src] {
  opacity: 0;
  transition: opacity 0.3s ease-in;
}

img.loaded {
  opacity: 1;
}

img.fade-in {
  animation: fadeIn 0.5s ease-in;
}

/* Классы для плавного появления контента */
body.dom-loaded .fade-in {
  animation: fadeIn 0.8s ease-out;
}

body.content-visible {
  opacity: 1;
  transition: opacity 0.5s ease;
}

/* Стили для email защиты */
.email-obfuscate::after {
  content: attr(data-encoded);
  display: none;
}

/* Мобильные улучшения */
@media (max-width: 768px) {
  .touch-optimized {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }

  .prevent-zoom {
    touch-action: pan-y;
    -ms-touch-action: pan-y;
  }
}

/* Анимации для интерактивных элементов */
.btn:active,
.nav-link:active,
.dropdown-item:active {
  transform: scale(0.98);
  transition: transform 0.1s ease;
}

/* Улучшение фокуса для доступности */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Предотвращение выбора текста на интерактивных элементах */
.navbar-brand,
.btn,
.nav-link,
.dropdown-item {
  user-select: none;
  -webkit-user-select: none;
}

/* Оптимизация рендеринга */
.will-change-transform {
  will-change: transform;
}

.will-change-opacity {
  will-change: opacity;
}

/* Дополнительные стили для accessibility */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}