@layer content {
  /* ===== ВСТРАИВАЕМАЯ СИСТЕМА ДОКУМЕНТОВ ===== */
  
  /* Document Viewer - встраивается в поток страницы */
  earth-document-viewer {
    display: block;
    position: relative;
    width: 100%;
    height: 0;
    overflow: hidden;
    background: var(--bg-primary);
    transition: height 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: var(--z-base);
  }
  
  /* Открытое состояние */
  earth-document-viewer.open {
    height: auto;
    min-height: 100vh;
  }
  
  /* ===== ВНУТРЕННЯЯ СТРУКТУРА ===== */
  
  .document-viewer__container {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    /* ✅ ИСПРАВЛЕНО: Убрана граница, создающая серую полосу */
    /* border-bottom: 1px solid var(--border-light); */
  }
  
  .document-viewer__content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
  }
  
  /* Header документа */
  .document-viewer__header {
    background: var(--bg-glass);
    backdrop-filter: var(--backdrop-blur-lg);
    /* ✅ ИСПРАВЛЕНО: Убрана граница снизу хедера документа */
    /* border-bottom: 1px solid var(--border-light); */
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    flex-shrink: 0;
  }
  
  .document-viewer__header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--container-padding);
    min-height: 80px;
    max-width: var(--container-max-width);
    margin: 0 auto;
    width: 100%;
  }
  
  .document-viewer__title {
    margin: 0;
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
    margin-right: var(--space-lg);
  }
  
  .document-viewer__controls {
    display: flex;
    align-items: center;
    gap: var(--space-md);
  }
  
  /* ===== УНИФИЦИРОВАННЫЕ СТИЛИ КНОПОК ===== */
  .document-viewer__back,
  .document-viewer__close {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
  }
  
  .document-viewer__close {
    padding: var(--space-md);
  }
  
  .document-viewer__back svg,
  .document-viewer__close svg {
    width: 18px;
    height: 18px;
  }
  
  /* ===== УНИФИЦИРОВАННЫЕ HOVER ЭФФЕКТЫ ===== */
  .hover-lift,
  .document-viewer__back:hover,
  .document-viewer__close:hover,
  .document-viewer__back:focus,
  .document-viewer__close:focus {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
  }
  
  /* Progress bar */
  .document-viewer__progress {
    height: 3px;
    background: var(--bg-tertiary);
    position: relative;
    overflow: hidden;
  }
  
  .document-viewer__progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    width: 0%;
    transition: width var(--transition-normal);
  }
  
  /* Body без отдельного скролла */
  .document-viewer__body {
    flex: 0 1 auto;
    position: relative;
  }
  
  /* Loading state */
  .document-viewer__loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 400px;
    text-align: center;
    color: var(--text-secondary);
  }
  
  .loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-light);
    border-top: 3px solid var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
    margin-bottom: var(--space-lg);
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }
  
  /* Document content area */
  .document-viewer__article {
    padding: var(--container-padding) var(--container-padding);
    max-width: var(--container-max-width);
    margin: 0 auto;
    width: 100%;
    line-height: 1.7;
    display: none;
    flex-shrink: 0;
    flex-grow: 0;
  }
  
  .document-viewer__article.loaded {
    display: block;
  }

  /* ===== MAINPAGE КОНТЕНТ ===== */
  
  .mainpage-content {
    width: 100%;
    margin: 0;
    padding: 0;
    background: var(--bg-primary);
    flex-shrink: 0;
    flex-grow: 0;
  }

  /* CSS изоляция для mainpage контента */
  .mainpage-isolated {
    position: static;
    z-index: auto;
    float: none;
    clear: none;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    display: block;
    width: 100%;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }

  /* ===== УПРОЩЕННЫЕ СЕЛЕКТОРЫ MAINPAGE ===== */
  .mainpage-isolated .section,
  .mainpage-isolated .critical-moments,
  .mainpage-isolated .scenarios-comparison,
  .mainpage-isolated .opportunity-windows,
  .mainpage-isolated .strategic-conclusions {
    align-self: flex-start;
    height: auto;
    display: block;
    align-items: flex-start;
    align-content: flex-start;
    justify-content: flex-start;
  }

  .mainpage-isolated .moment-card,
  .mainpage-isolated .scenario-card,
  .mainpage-isolated .window-card,
  .mainpage-isolated .conclusion-item {
    align-self: flex-start;
    height: auto;
    flex-grow: 0;
    flex-shrink: 0;
    flex-basis: auto;
  }

  .mainpage-isolated .moments-grid,
  .mainpage-isolated .scenarios-grid,
  .mainpage-isolated .windows-timeline,
  .mainpage-isolated .conclusions-grid {
    align-items: flex-start;
    grid-auto-rows: auto;
  }

  /* ===== БАЗОВЫЕ СТИЛИ ТЕКСТА ===== */
  .mainpage-isolated h1, 
  .mainpage-isolated h2, 
  .mainpage-isolated h3, 
  .mainpage-isolated h4, 
  .mainpage-isolated h5, 
  .mainpage-isolated h6 {
    font-family: inherit;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem 0;
    color: var(--text-primary);
  }

  .mainpage-isolated p {
    margin: 1rem 0;
    line-height: 1.6;
    color: var(--text-secondary);
  }

  .mainpage-isolated ul,
  .mainpage-isolated ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
  }

  .mainpage-isolated li {
    margin: 0.25rem 0;
  }

  .mainpage-isolated table {
    border-collapse: collapse;
    width: 100%;
    margin: 1rem 0;
  }

  .mainpage-isolated th,
  .mainpage-isolated td {
    padding: 0.5rem;
    border: 1px solid var(--border-light);
    text-align: left;
  }

  .mainpage-isolated th {
    background: var(--bg-secondary);
    font-weight: 600;
  }

  /* ===== ИНТЕРАКТИВНЫЕ ЭЛЕМЕНТЫ ===== */
  .mainpage-content .highlighted {
    background: rgba(59, 130, 246, 0.1);
    border: 2px solid var(--color-primary);
    transform: scale(1.02);
    transition: all 0.3s ease-out;
  }

  .mainpage-content .expanded {
    max-height: none;
    overflow: visible;
    transition: all 0.3s ease-out;
  }

  /* ===== УНИФИЦИРОВАННЫЕ HOVER ЭФФЕКТЫ КАРТОЧЕК ===== */
  .card-hover,
  .mainpage-content .moment-card:hover,
  .mainpage-content .scenario-card:hover,
  .mainpage-content .window-card:hover,
  .mainpage-content .conclusion-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    transition: all 0.3s ease-out;
  }
  
  /* ===== СТИЛИ КОНТЕНТА ДОКУМЕНТОВ ===== */
  
  .document-content {
    max-width: var(--container-max-width);
    margin: 0 auto;
    line-height: 1.7;
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    padding: 0;
    width: 100%;
  }

  .document-content h1,
  .document-content h2,
  .document-content h3,
  .document-content h4,
  .document-content h5,
  .document-content h6 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
  }

  .document-content p {
    margin-top: 0.75rem;
    margin-bottom: 0.75rem;
  }

  .document-content ul,
  .document-content ol {
    margin: 1rem 0;
    padding-left: 1.5rem;
  }

  .document-content li {
    margin: 0.25rem 0;
  }
  
  /* ===== КОМПОНЕНТЫ ДОКУМЕНТОВ ===== */
  
  .document-intro {
    text-align: center;
    padding: 40px 20px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-3xl);
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  
  .document-title {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl));
    font-weight: 700;
    margin: 0;
    line-height: 1.2;
  }
  
  .document-subtitle {
    font-size: clamp(var(--font-size-lg), 3vw, var(--font-size-xl));
    margin: var(--space-sm) 0 0;
    opacity: 0.95;
    font-style: italic;
  }
  
  .document-section {
    margin-bottom: var(--space-4xl);
  }
  
  .section-title {
    font-size: clamp(var(--font-size-xl), 4vw, var(--font-size-2xl));
    color: var(--color-primary);
    margin: 0 0 var(--space-xl);
    text-align: center;
    font-weight: 600;
    position: relative;
  }
  
  .section-title::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
  }
  
  .document-section p {
    margin-bottom: var(--space-lg);
    color: var(--text-secondary);
    line-height: 1.7;
  }
  
  /* ===== СЕТКИ И КАРТОЧКИ ===== */
  
  .beliefs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
    margin: var(--space-xl) 0;
  }
  
  .belief-card {
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
    position: relative;
  }
  
  .belief-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  }
  
  .belief-card:hover,
  .belief-card:focus-within {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
  }

  .belief-card:focus-within {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
  }
  
  .belief-title {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    font-weight: 600;
    margin: 0 0 var(--space-md);
    line-height: 1.3;
  }
  
  .belief-text {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    font-style: italic;
  }
  
  .commitments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
  }
  
  .commitment-item {
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    line-height: 1.6;
    transition: all var(--transition-normal);
    position: relative;
    padding-left: calc(var(--space-xl) + 32px);
  }
  
  .commitment-item::before {
    content: '✓';
    position: absolute;
    top: var(--space-md);
    left: var(--space-md);
    width: 24px;
    height: 24px;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
  }
  
  .commitment-item:hover,
  .commitment-item:focus-within {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
  }

  .commitment-item:focus-within {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
  }
  
  /* ===== СПЕЦИАЛЬНЫЕ БЛОКИ ===== */
  
  .vision-block {
    background: var(--bg-secondary);
    padding: var(--space-3xl);
    border-radius: var(--radius-xl);
    margin: var(--space-xl) 0;
    text-align: center;
    border: 1px solid var(--border-light);
    position: relative;
  }
  
  .vision-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0.03;
    border-radius: var(--radius-xl);
    z-index: 0;
  }
  
  .vision-title {
    color: var(--color-primary);
    margin: 0 0 var(--space-xl);
    font-size: var(--font-size-xl);
    font-weight: 600;
    position: relative;
    z-index: 1;
  }
  
  .vision-lines {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    font-style: italic;
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
  }
  
  .vision-lines div {
    margin: var(--space-sm) 0;
    padding: var(--space-xs) 0;
    border-radius: var(--radius-sm);
    transition: all var(--transition-quick);
  }
  
  .vision-lines div:hover {
    background: var(--hover-overlay);
    padding: var(--space-xs) var(--space-sm);
  }
  
  .call-to-action {
    background: var(--bg-secondary);
    padding: var(--space-3xl);
    border-radius: var(--radius-xl);
    margin: var(--space-xl) 0;
    text-align: center;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
  }
  
  .action-title {
    color: var(--color-primary);
    margin: 0 0 var(--space-xl);
    font-size: var(--font-size-xl);
    font-weight: 600;
  }
  
  .call-to-action p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
    font-size: var(--font-size-lg);
  }
  
  .call-to-action p:last-child {
    margin-bottom: 0;
    font-weight: 500;
    color: var(--text-primary);
  }
  
  /* ===== ФИНАЛЬНАЯ ДЕКЛАРАЦИЯ (ОБЛЕГЧЕННАЯ АНИМАЦИЯ) ===== */
  
  .final-declaration {
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-3xl);
    border-radius: var(--radius-xl);
    margin: var(--space-4xl) 0 var(--space-6xl) 0;
    text-align: center;
    font-size: var(--font-size-lg);
    font-weight: 600;
    line-height: 1.6;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
  }
  
  .final-declaration::before {
    content: '';
    position: absolute;
    top: -25%;
    left: -25%;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 60%);
    animation: lightShimmer 4s ease-in-out infinite;
    pointer-events: none;
  }
  
  @keyframes lightShimmer {
    0%, 100% { transform: translateX(-25%) translateY(-25%) scale(1); opacity: 0.3; }
    50% { transform: translateX(-25%) translateY(-25%) scale(1.1); opacity: 0.6; }
  }
  
  /* ===== ГЛАВНАЯ СТРАНИЦА ===== */
  .main-content {
    position: relative;
    background: var(--bg-primary);
    min-height: 100vh;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  }
  
  /* ===== АДАПТИВНОСТЬ ===== */
  @media (max-width: 768px) {
    .beliefs-grid,
    .commitments-grid {
      grid-template-columns: 1fr;
    }
    
    .document-intro {
      padding: var(--space-xl);
      min-height: 100px;
    }
    
    .document-viewer__article {
      padding: var(--space-xl) var(--space-lg);
    }
    
    .document-viewer__header-content {
      padding: var(--space-md);
      min-height: 70px;
    }
    
    .document-viewer__title {
      font-size: var(--font-size-lg);
    }
    
    .document-viewer__back span {
      display: none;
    }
    
    .belief-card,
    .commitment-item,
    .vision-block,
    .call-to-action {
      padding: var(--space-lg);
    }

    .vision-lines {
      font-size: var(--font-size-base);
    }

    .call-to-action p {
      font-size: var(--font-size-base);
    }

    .mainpage-content {
      padding: var(--space-md);
    }

    .mainpage-isolated .section {
      margin-bottom: var(--space-xl);
    }

    .mainpage-isolated .moment-card,
    .mainpage-isolated .scenario-card,
    .mainpage-isolated .window-card,
    .mainpage-isolated .conclusion-item {
      margin-bottom: var(--space-md);
    }
  }

  @media (max-width: 480px) {
    .document-intro {
      padding: var(--space-lg);
    }

    .section-title {
      font-size: var(--font-size-lg);
    }

    .document-title {
      font-size: var(--font-size-2xl);
    }

    .document-subtitle {
      font-size: var(--font-size-base);
    }
    
    .document-viewer__header-content {
      flex-direction: column;
      gap: var(--space-md);
      align-items: stretch;
    }

    .document-viewer__controls {
      justify-content: space-between;
    }

    .mainpage-content {
      font-size: var(--font-size-sm);
    }

    .mainpage-isolated .section {
      padding: var(--space-sm);
    }
  }
  
  /* ===== ACCESSIBILITY ===== */
  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }

    .final-declaration::before {
      animation: none;
    }

    .vision-lines div {
      transition: none;
    }

    .mainpage-content .highlighted,
    .mainpage-content .expanded {
      transition: none;
    }
  }
}