/* ==========================================================================
       VARIABLES Y SISTEMA DE DISEÑO
       ========================================================================== */
    :root {
      /* Tema Oscuro */
      --bg-base: #0a0e17;
      --bg-surface: #111827;
      --bg-surface-elevated: #1a2234;
      --bg-surface-hover: #222d42;
      --border-color: #334155;
      --border-color-light: #475569;
      
      --text-main: #f3f4f6;
      --text-muted: #9ca3af;
      --text-dim: #6b7280;
      
      --primary: #06b6d4;
      --primary-hover: #0891b2;
      --primary-glow: rgba(6, 182, 212, 0.25);
      --primary-subtle: rgba(6, 182, 212, 0.12);
      
      --accent: #8b5cf6;
      --accent-hover: #7c3aed;
      --accent-subtle: rgba(139, 92, 246, 0.12);

      --success: #10b981;
      --success-subtle: rgba(16, 185, 129, 0.15);
      --warning: #f59e0b;
      --warning-subtle: rgba(245, 158, 11, 0.15);
      --danger: #ef4444;
      --danger-subtle: rgba(239, 68, 68, 0.15);
      --info: #3b82f6;

      --tag-bg: rgba(6, 182, 212, 0.1);
      --tag-border: rgba(6, 182, 212, 0.3);
      --tag-text: #38bdf8;
      --tag-hover: rgba(6, 182, 212, 0.25);

      --code-bg: #070a10;
      --code-border: #1e293b;

      --radius-sm: 5px;
      --radius-md: 8px;
      --radius-lg: 12px;
      --radius-full: 9999px;

      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.35);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.45);
      --shadow-glow: 0 0 18px rgba(6, 182, 212, 0.2);

      --transition-fast: 0.15s ease;
      --transition-normal: 0.22s cubic-bezier(0.4, 0, 0.2, 1);

      --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    }

    [data-theme="light"] {
      --bg-base: #f8fafc;
      --bg-surface: #ffffff;
      --bg-surface-elevated: #f1f5f9;
      --bg-surface-hover: #e2e8f0;
      --border-color: #cbd5e1;
      --border-color-light: #94a3b8;
      
      --text-main: #0f172a;
      --text-muted: #64748b;
      --text-dim: #94a3b8;
      
      --primary: #0284c7;
      --primary-hover: #0369a1;
      --primary-glow: rgba(2, 132, 199, 0.2);
      --primary-subtle: rgba(2, 132, 199, 0.08);

      --tag-bg: rgba(2, 132, 199, 0.08);
      --tag-border: rgba(2, 132, 199, 0.25);
      --tag-text: #0284c7;
      --tag-hover: rgba(2, 132, 199, 0.16);

      --code-bg: #f1f5f9;
      --code-border: #cbd5e1;

      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
    }

    /* ==========================================================================
       RESETEO Y ESTILOS BASE
       ========================================================================== */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-base);
      color: var(--text-main);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      line-height: 1.45;
      -webkit-font-smoothing: antialiased;
      transition: background-color var(--transition-normal), color var(--transition-normal);
      overflow-x: hidden;
    }

    body::before {
      content: '';
      position: fixed;
      inset: 0;
      background-image: 
        radial-gradient(circle at 15% 15%, var(--primary-subtle) 0%, transparent 40%),
        radial-gradient(circle at 85% 85%, var(--accent-subtle) 0%, transparent 40%),
        linear-gradient(to right, var(--border-color) 1px, transparent 1px),
        linear-gradient(to bottom, var(--border-color) 1px, transparent 1px);
      background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
      opacity: 0.3;
      pointer-events: none;
      z-index: -1;
    }

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

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
      transition: all var(--transition-fast);
    }

    input, select, textarea {
      font-family: inherit;
      font-size: 0.9rem;
      background-color: var(--bg-surface-elevated);
      color: var(--text-main);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 0.55rem 0.8rem;
      transition: all var(--transition-fast);
    }
    input:focus, select:focus, textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 2px var(--primary-glow);
    }

    /* Accesibilidad: Foco de teclado de alto contraste */
    *:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
      border-radius: inherit;
    }

    /* ==========================================================================
       CABECERA (HEADER)
       ========================================================================== */
    .app-header {
      position: sticky;
      top: 0;
      z-index: 40;
      background-color: rgba(17, 24, 39, 0.88);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      padding: 0.6rem 1.25rem;
      transition: background-color var(--transition-normal);
    }
    [data-theme="light"] .app-header {
      background-color: rgba(255, 255, 255, 0.88);
    }

    .header-container {
      max-width: 1560px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.95rem;
      flex-wrap: wrap;
    }

    .brand-area {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .brand-icon {
      width: 42px;
      height: 42px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      box-shadow: var(--shadow-glow);
      flex-shrink: 0;
    }
    .brand-icon svg {
      width: 24px;
      height: 24px;
      stroke-width: 2.2;
    }

    .brand-title {
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      display: flex;
      align-items: center;
      gap: 0.55rem;
    }
    .brand-title .badge-pro {
      font-size: 0.72rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      padding: 0.12rem 0.5rem;
      border-radius: var(--radius-sm);
      background-color: var(--primary-subtle);
      color: var(--primary);
      border: 1px solid var(--tag-border);
    }

    .brand-subtitle {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.55rem;
      padding: 0.55rem 1rem;
      font-size: 0.96rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all var(--transition-fast);
      user-select: none;
    }
    .btn svg {
      width: 17px;
      height: 17px;
      stroke-width: 2;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: var(--shadow-sm);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
      box-shadow: var(--shadow-glow);
    }

    .btn-secondary {
      background-color: var(--bg-surface-elevated);
      color: var(--text-main);
      border: 1px solid var(--border-color);
    }
    .btn-secondary:hover {
      background-color: var(--bg-surface-hover);
      border-color: var(--border-color-light);
      transform: translateY(-1px);
    }

    .btn-danger {
      background-color: var(--danger-subtle);
      color: var(--danger);
      border: 1px solid var(--danger);
    }
    .btn-danger:hover {
      background-color: var(--danger);
      color: #ffffff;
      transform: translateY(-1px);
    }

    .btn-backup {
      background: linear-gradient(135deg, rgba(139, 92, 246, 0.12) 0%, rgba(6, 182, 212, 0.12) 100%);
      color: var(--text-main);
      border: 1px solid rgba(139, 92, 246, 0.3);
    }
    .btn-backup:hover {
      background: linear-gradient(135deg, rgba(139, 92, 246, 0.22) 0%, rgba(6, 182, 212, 0.22) 100%);
      border-color: var(--accent);
      transform: translateY(-1px);
    }

    .btn-icon {
      padding: 0.55rem;
      border-radius: var(--radius-md);
      background-color: var(--bg-surface-elevated);
      color: var(--text-muted);
      border: 1px solid var(--border-color);
    }
    .btn-icon:hover {
      color: var(--text-main);
      background-color: var(--bg-surface-hover);
    }

    .storage-status {
      display: inline-flex;
      align-items: center;
      gap: 0.45rem;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 0.3rem 0.65rem;
      border-radius: var(--radius-full);
      background-color: var(--bg-surface-elevated);
      border: 1px solid var(--border-color);
    }
    .status-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background-color: var(--success);
      box-shadow: 0 0 6px var(--success);
      animation: pulseDot 2s infinite;
    }
    @keyframes pulseDot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }

    /* ==========================================================================
       ESTRUCTURA PRINCIPAL Y CONTENEDOR
       ========================================================================== */
    .app-main {
      flex: 1;
      max-width: 1560px;
      width: 100%;
      margin: 0 auto;
      padding: 1.2rem 1.5rem;
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
    }

    /* ==========================================================================
       BARRA DE ESTADÍSTICAS Y MÉTRICAS (+20%)
       ========================================================================== */
    .stats-bar {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
      gap: 0.8rem;
    }

    .stat-card {
      background-color: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 0.7rem 1rem;
      display: flex;
      align-items: center;
      gap: 0.8rem;
      transition: all var(--transition-fast);
    }
    .stat-card:hover {
      border-color: var(--border-color-light);
      transform: translateY(-1px);
    }

    .stat-icon-wrapper {
      width: 38px;
      height: 38px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }
    .stat-icon-wrapper svg {
      width: 20px;
      height: 20px;
    }
    .stat-icon-blue { background-color: var(--primary-subtle); color: var(--primary); }
    .stat-icon-purple { background-color: var(--accent-subtle); color: var(--accent); }
    .stat-icon-amber { background-color: var(--warning-subtle); color: var(--warning); }
    .stat-icon-green { background-color: var(--success-subtle); color: var(--success); }

    .stat-info {
      display: flex;
      flex-direction: column;
      line-height: 1.2;
    }
    .stat-value {
      font-size: 1.38rem;
      font-weight: 800;
      letter-spacing: -0.02em;
    }
    .stat-label {
      font-size: 0.82rem;
      color: var(--text-muted);
      font-weight: 500;
      white-space: nowrap;
    }

    /* ==========================================================================
       MÓDULO DE BÚSQUEDA Y FILTROS DESPLEGABLE (+20%)
       ========================================================================== */
    .control-panel {
      background-color: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 1.05rem 1.25rem;
      display: flex;
      flex-direction: column;
      gap: 0.9rem;
      box-shadow: var(--shadow-sm);
      transition: border-color var(--transition-fast);
    }

    .search-main-row {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      position: relative;
    }

    .search-input-wrapper {
      position: relative;
      flex: 1;
      min-width: 260px;
    }

    .search-input-wrapper svg.search-icon {
      position: absolute;
      left: 1rem;
      top: 50%;
      transform: translateY(-50%);
      width: 19px;
      height: 19px;
      color: var(--text-muted);
      pointer-events: none;
    }

    .search-input {
      width: 100%;
      padding-left: 2.8rem;
      padding-right: 5rem;
      font-size: 1.05rem;
      height: 46px;
      background-color: var(--bg-surface-elevated);
      border-color: var(--border-color);
      border-radius: var(--radius-md);
    }

    .search-input-wrapper .kbd-shortcut {
      position: absolute;
      right: 0.75rem;
      top: 50%;
      transform: translateY(-50%);
      font-family: var(--font-mono);
      font-size: 0.78rem;
      background-color: var(--bg-surface);
      border: 1px solid var(--border-color);
      color: var(--text-dim);
      padding: 0.2rem 0.45rem;
      border-radius: var(--radius-sm);
      pointer-events: none;
    }

    /* Botón Desplegable de Filtros */
    .btn-toggle-drawer {
      height: 46px;
      display: inline-flex;
      align-items: center;
      gap: 0.55rem;
      padding: 0 1rem;
      border-radius: var(--radius-md);
      background-color: var(--bg-surface-elevated);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-size: 0.96rem;
      font-weight: 600;
      white-space: nowrap;
      flex-shrink: 0;
    }
    .btn-toggle-drawer:hover {
      background-color: var(--bg-surface-hover);
      border-color: var(--border-color-light);
    }
    .btn-toggle-drawer.active-filters {
      border-color: var(--primary);
      background-color: var(--primary-subtle);
      color: var(--primary);
    }
    .btn-toggle-drawer svg.chevron-icon {
      width: 17px;
      height: 17px;
      transition: transform var(--transition-normal);
    }
    .btn-toggle-drawer.expanded svg.chevron-icon {
      transform: rotate(180deg);
    }
    .active-filters-count {
      font-size: 0.8rem;
      background-color: var(--primary);
      color: #ffffff;
      padding: 0.08rem 0.48rem;
      border-radius: var(--radius-full);
      font-weight: 700;
    }

    /* Panel Plegable (Drawer) */
    .filters-collapsible-content {
      display: none;
      flex-direction: column;
      gap: 0.9rem;
      padding-top: 0.9rem;
      border-top: 1px solid var(--border-color);
      animation: slideDown 0.2s ease forwards;
    }
    .filters-collapsible-content.show {
      display: flex;
    }

    @keyframes slideDown {
      from { opacity: 0; transform: translateY(-6px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* Pestañas de Estado de Archivado (Subfase 1.4) */
    .archive-state-tabs {
      display: flex;
      align-items: center;
      gap: 0.35rem;
      padding: 0.3rem;
      margin-bottom: 0.85rem;
      background-color: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      width: fit-content;
    }
    .archive-tab-btn {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      padding: 0.4rem 0.9rem;
      border-radius: var(--radius-sm);
      color: var(--text-muted);
      font-size: 0.88rem;
      font-weight: 600;
      background: transparent;
      border: 1px solid transparent;
    }
    .archive-tab-btn:hover {
      color: var(--text-main);
      background-color: var(--bg-surface-elevated);
    }
    .archive-tab-btn.active {
      background-color: var(--primary-subtle);
      color: var(--primary);
      border-color: var(--primary);
    }
    .archive-tab-count {
      font-size: 0.72rem;
      font-weight: 700;
      background-color: var(--bg-surface-elevated);
      color: var(--text-dim);
      border-radius: var(--radius-full);
      padding: 0.05rem 0.45rem;
      min-width: 1.2em;
      text-align: center;
    }
    .archive-tab-btn.active .archive-tab-count {
      background-color: var(--primary);
      color: #fff;
    }

    .filter-selectors-row {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      flex-wrap: wrap;
    }

    .filter-selectors-row select {
      height: 42px;
      padding: 0 0.85rem;
      font-size: 0.95rem;
      cursor: pointer;
      font-weight: 500;
    }

    .toggle-favs-btn {
      height: 42px;
      display: inline-flex;
      align-items: center;
      gap: 0.45rem;
      padding: 0 0.9rem;
      border-radius: var(--radius-md);
      background-color: var(--bg-surface-elevated);
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      font-size: 0.95rem;
      font-weight: 600;
    }
    .toggle-favs-btn.active {
      background-color: var(--warning-subtle);
      border-color: var(--warning);
      color: var(--warning);
    }

    /* Nube de Hashtags (#) */
    .tag-cloud-section {
      display: flex;
      flex-direction: column;
      gap: 0.55rem;
    }

    .tag-cloud-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.6rem;
      font-size: 0.88rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--text-muted);
    }

    .clear-filters-btn {
      font-size: 0.85rem;
      color: var(--danger);
      background: none;
      padding: 0.15rem 0.5rem;
      border-radius: var(--radius-sm);
      display: none;
      font-weight: 600;
    }
    .clear-filters-btn:hover {
      background-color: var(--danger-subtle);
    }

    .tag-cloud-container {
      display: flex;
      flex-wrap: wrap;
      gap: 0.45rem;
      max-height: 125px;
      overflow-y: auto;
    }
    .tag-cloud-container::-webkit-scrollbar { width: 4px; }
    .tag-cloud-container::-webkit-scrollbar-thumb { background-color: var(--border-color); }

    .tag-pill {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      padding: 0.28rem 0.65rem;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--tag-text);
      background-color: var(--tag-bg);
      border: 1px solid var(--tag-border);
      border-radius: var(--radius-full);
      cursor: pointer;
      user-select: none;
    }
    .tag-pill:hover {
      background-color: var(--tag-hover);
    }
    .tag-pill.active {
      background-color: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }
    .tag-pill .tag-count {
      font-size: 0.78rem;
      opacity: 0.8;
      background-color: rgba(0, 0, 0, 0.2);
      padding: 0.04rem 0.36rem;
      border-radius: var(--radius-full);
    }

    /* ==========================================================================
       CABECERA DE RESULTADOS Y OPCIONES DE VISTA
       ========================================================================== */
    .cards-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
    }

    .cards-count-label {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .cards-count-badge {
      background-color: var(--primary-subtle);
      color: var(--primary);
      font-size: 0.88rem;
      padding: 0.12rem 0.55rem;
      border-radius: var(--radius-full);
      font-weight: 700;
    }

    .view-options {
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    .view-btn {
      padding: 0.45rem;
      border-radius: var(--radius-md);
      background-color: var(--bg-surface);
      border: 1px solid var(--border-color);
      color: var(--text-muted);
    }
    .view-btn.active {
      background-color: var(--primary-subtle);
      color: var(--primary);
      border-color: var(--primary);
    }

    /* ==========================================================================
       TARJETAS DE CONOCIMIENTO (TECH CARDS) (+20% DE TAMAÑO)
       ========================================================================== */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
      gap: 1.05rem;
    }
    .cards-grid.list-view {
      grid-template-columns: 1fr;
    }

    .tech-card {
      background-color: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 1.05rem;
      display: flex;
      flex-direction: column;
      gap: 0.7rem;
      position: relative;
      transition: all var(--transition-fast);
      cursor: pointer;
      box-shadow: var(--shadow-sm);
    }
    .tech-card:hover {
      border-color: var(--border-color-light);
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }
    .tech-card.pinned {
      border-color: rgba(245, 158, 11, 0.35);
      background: linear-gradient(180deg, rgba(245, 158, 11, 0.03) 0%, var(--bg-surface) 100%);
    }
    .tech-card.archived-card {
      opacity: 0.68;
      background: repeating-linear-gradient(
        135deg,
        var(--bg-surface) 0px,
        var(--bg-surface) 10px,
        var(--bg-surface-elevated) 10px,
        var(--bg-surface-elevated) 20px
      );
    }
    .tech-card.archived-card:hover {
      opacity: 1;
    }

    .card-top {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 0.5rem;
    }

    .card-actions {
      display: flex;
      align-items: center;
      gap: 0.15rem;
    }

    .card-badges {
      display: flex;
      align-items: center;
      gap: 0.35rem;
      flex-wrap: wrap;
    }

    .badge {
      font-size: 0.78rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.03em;
      padding: 0.16rem 0.5rem;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
    }
    .badge-category {
      background-color: var(--bg-surface-elevated);
      color: var(--text-main);
      border: 1px solid var(--border-color);
    }
    .badge-severity-baja { background-color: var(--success-subtle); color: var(--success); }
    .badge-severity-media { background-color: var(--warning-subtle); color: var(--warning); }
    .badge-severity-alta { background-color: var(--danger-subtle); color: var(--danger); }
    .badge-severity-critica { background-color: #ef4444; color: #ffffff; }
    .badge-archived {
      background-color: var(--bg-surface-elevated);
      color: var(--text-dim);
      border: 1px dashed var(--border-color-light);
    }

    .btn-pin, .btn-archive {
      color: var(--text-dim);
      padding: 0.25rem;
      border-radius: var(--radius-sm);
    }
    .btn-pin:hover, .btn-pin.active {
      color: var(--warning);
    }
    .btn-archive:hover {
      color: var(--primary);
    }

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      letter-spacing: -0.01em;
    }
    .card-title mark {
      background-color: var(--warning-subtle);
      color: var(--warning);
      border-radius: 2px;
      padding: 0 0.15rem;
    }

    .card-content-preview {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.45;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: pre-line;
    }

    .card-command-box {
      background-color: var(--code-bg);
      border: 1px solid var(--code-border);
      border-radius: var(--radius-sm);
      padding: 0.45rem 0.7rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.5rem;
      font-family: var(--font-mono);
      font-size: 0.85rem;
      color: var(--primary);
      overflow: hidden;
    }
    .card-command-text {
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .card-copy-cmd-btn {
      color: var(--text-muted);
      padding: 0.2rem;
      border-radius: var(--radius-sm);
      flex-shrink: 0;
    }
    .card-copy-cmd-btn:hover {
      color: #ffffff;
      background-color: rgba(255, 255, 255, 0.1);
    }

    .card-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.35rem;
    }
    .card-tag-pill {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--tag-text);
      background-color: var(--tag-bg);
      padding: 0.12rem 0.48rem;
      border-radius: var(--radius-sm);
    }
    .card-tag-pill:hover {
      background-color: var(--tag-hover);
    }

    .card-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 0.5rem;
      padding-top: 0.55rem;
      border-top: 1px solid var(--border-color);
      font-size: 0.84rem;
      color: var(--text-dim);
      margin-top: auto;
    }

    .related-count-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
      color: var(--accent);
      font-weight: 600;
      background-color: var(--accent-subtle);
      padding: 0.12rem 0.45rem;
      border-radius: var(--radius-sm);
      font-size: 0.78rem;
    }

    .empty-state {
      grid-column: 1 / -1;
      text-align: center;
      padding: 3.5rem 1.5rem;
      background-color: var(--bg-surface);
      border: 1px dashed var(--border-color-light);
      border-radius: var(--radius-lg);
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 1rem;
    }
    .empty-icon {
      width: 62px;
      height: 62px;
      border-radius: 50%;
      background-color: var(--bg-surface-elevated);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-dim);
    }
    .empty-icon svg { width: 32px; height: 32px; }
    .empty-title { font-size: 1.3rem; font-weight: 700; }
    .empty-desc { font-size: 1rem; color: var(--text-muted); max-width: 450px; }

    /* ==========================================================================
       MODALES Y VENTANAS DIÁLOGO (+20% DE TAMAÑO)
       ========================================================================== */
    .modal-backdrop {
      position: fixed;
      inset: 0;
      background-color: rgba(0, 0, 0, 0.7);
      backdrop-filter: blur(6px);
      -webkit-backdrop-filter: blur(6px);
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 1.25rem;
      opacity: 0;
      visibility: hidden;
      transition: all var(--transition-normal);
    }
    .modal-backdrop.open {
      opacity: 1;
      visibility: visible;
    }

    .modal-dialog {
      background-color: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      width: 100%;
      max-width: 864px;
      max-height: 90vh;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-lg);
      transform: scale(0.96);
      transition: transform var(--transition-normal);
      overflow: hidden;
    }
    .modal-backdrop.open .modal-dialog {
      transform: scale(1);
    }
    .modal-dialog.large-dialog {
      max-width: 1080px;
    }

    .modal-header {
      padding: 1.2rem 1.5rem;
      border-bottom: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
    }
    .modal-title {
      font-size: 1.3rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .btn-close-modal {
      color: var(--text-muted);
      padding: 0.45rem;
      border-radius: var(--radius-md);
      font-size: 1.1rem;
    }
    .btn-close-modal:hover {
      background-color: var(--bg-surface-elevated);
      color: var(--text-main);
    }

    .modal-body {
      padding: 1.5rem;
      overflow-y: auto;
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
    }

    .modal-footer {
      padding: 1.05rem 1.5rem;
      border-top: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 0.75rem;
      background-color: var(--bg-surface-elevated);
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 0.45rem;
    }
    .form-label {
      font-size: 0.96rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .form-hint { font-size: 0.82rem; color: var(--text-dim); }

    .form-row {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(215px, 1fr));
      gap: 1rem;
    }

    .tags-input-container {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 0.45rem;
      padding: 0.55rem;
      background-color: var(--bg-surface-elevated);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      min-height: 50px;
    }
    .tags-input-container:focus-within {
      border-color: var(--primary);
      box-shadow: 0 0 0 2px var(--primary-glow);
    }
    .tag-edit-chip {
      background-color: var(--tag-bg);
      border: 1px solid var(--tag-border);
      color: var(--tag-text);
      padding: 0.2rem 0.55rem;
      border-radius: var(--radius-full);
      font-size: 0.9rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
    }
    .tag-edit-chip .btn-remove-tag {
      color: var(--text-dim);
      cursor: pointer;
      display: flex;
    }
    .tag-edit-chip .btn-remove-tag:hover { color: var(--danger); }
    .tags-raw-input {
      border: none !important;
      background: transparent !important;
      padding: 0.25rem !important;
      box-shadow: none !important;
      flex: 1;
      min-width: 140px;
      font-size: 0.96rem;
    }

    .editor-toolbar {
      display: flex;
      align-items: center;
      gap: 0.45rem;
      flex-wrap: wrap;
      padding: 0.45rem;
      background-color: var(--bg-surface-elevated);
      border: 1px solid var(--border-color);
      border-bottom: none;
      border-top-left-radius: var(--radius-md);
      border-top-right-radius: var(--radius-md);
    }
    .btn-tool {
      padding: 0.32rem 0.65rem;
      font-size: 0.88rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      background-color: var(--bg-surface);
      color: var(--text-muted);
      border: 1px solid var(--border-color);
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
    }
    .btn-tool:hover {
      background-color: var(--bg-surface-hover);
      color: var(--text-main);
    }

    .solution-textarea {
      border-top-left-radius: 0;
      border-top-right-radius: 0;
      min-height: 195px;
      resize: vertical;
      line-height: 1.55;
      font-size: 0.96rem;
    }

    /* ==========================================================================
       DETALLE COMPLETO / VISOR DE DIAGNÓSTICO (+20%)
       ========================================================================== */
    .viewer-meta-header {
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
      padding-bottom: 1rem;
      border-bottom: 1px solid var(--border-color);
    }
    .viewer-title {
      font-size: 1.62rem;
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.02em;
    }
    .viewer-submeta {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 0.9rem;
      color: var(--text-muted);
      flex-wrap: wrap;
    }

    .viewer-body-content {
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
      line-height: 1.65;
    }

    .proc-step-item {
      display: flex;
      align-items: flex-start;
      gap: 0.8rem;
      padding: 0.7rem 0.95rem;
      background-color: var(--bg-surface-elevated);
      border-radius: var(--radius-md);
      border-left: 3px solid var(--primary);
    }
    .proc-checkbox {
      margin-top: 0.25rem;
      width: 19px;
      height: 19px;
      cursor: pointer;
      accent-color: var(--primary);
    }
    .proc-step-text {
      flex: 1;
      font-size: 1.05rem;
    }

    .code-snippet-box {
      background-color: var(--code-bg);
      border: 1px solid var(--code-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      margin: 0.5rem 0;
    }
    .code-snippet-header {
      background-color: rgba(255, 255, 255, 0.04);
      padding: 0.45rem 0.9rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-family: var(--font-mono);
      font-size: 0.86rem;
      color: var(--text-muted);
      border-bottom: 1px solid var(--code-border);
    }
    .code-snippet-body {
      padding: 0.9rem 1rem;
      font-family: var(--font-mono);
      font-size: 1rem;
      color: #38bdf8;
      overflow-x: auto;
      white-space: pre-wrap;
      word-break: break-all;
    }

    .callout-warning {
      background-color: var(--warning-subtle);
      border-left: 3px solid var(--warning);
      padding: 0.9rem 1.05rem;
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      color: var(--text-main);
      font-size: 1rem;
    }

    .related-section {
      background-color: var(--bg-surface-elevated);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.05rem;
      display: flex;
      flex-direction: column;
      gap: 0.8rem;
      margin-top: 0.9rem;
    }
    .related-section-title {
      font-size: 0.98rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 0.4rem;
      color: var(--accent);
    }
    .related-cards-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(288px, 1fr));
      gap: 0.6rem;
    }
    .related-card-link {
      background-color: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 0.65rem 0.85rem;
      display: flex;
      flex-direction: column;
      gap: 0.25rem;
      cursor: pointer;
      transition: all var(--transition-fast);
    }
    .related-card-link:hover {
      border-color: var(--accent);
      transform: translateX(2px);
    }
    .related-link-title {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .related-shared-tags {
      font-size: 0.82rem;
      color: var(--text-dim);
    }

    /* ==========================================================================
       MODAL DE RESPALDO Y COPIAS DE SEGURIDAD (JSON) (+20%)
       ========================================================================== */
    .backup-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1.5rem;
    }
    @media (max-width: 650px) {
      .backup-grid { grid-template-columns: 1fr; }
    }

    .backup-box {
      background-color: var(--bg-surface-elevated);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.25rem;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }
    .backup-box-title {
      font-size: 1.1rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      gap: 0.55rem;
    }
    .backup-box-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.45;
    }

    .dropzone {
      border: 2px dashed var(--border-color-light);
      border-radius: var(--radius-md);
      padding: 1.5rem 1rem;
      text-align: center;
      cursor: pointer;
      transition: all var(--transition-fast);
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.5rem;
      background-color: var(--bg-surface);
    }
    .dropzone:hover, .dropzone.dragover {
      border-color: var(--primary);
      background-color: var(--primary-subtle);
    }
    .dropzone svg {
      width: 34px;
      height: 34px;
      color: var(--text-dim);
    }

    .import-options {
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
      font-size: 0.92rem;
    }
    .radio-option {
      display: flex;
      align-items: center;
      gap: 0.55rem;
      cursor: pointer;
    }

    /* ==========================================================================
       TOAST NOTIFICATIONS (+20%)
       ========================================================================== */
    .toast-container {
      position: fixed;
      bottom: 1.5rem;
      right: 1.5rem;
      z-index: 120;
      display: flex;
      flex-direction: column;
      gap: 0.6rem;
      pointer-events: none;
    }

    .toast {
      background-color: var(--bg-surface-elevated);
      border: 1px solid var(--border-color);
      color: var(--text-main);
      border-radius: var(--radius-md);
      padding: 0.78rem 1.15rem;
      font-size: 0.96rem;
      font-weight: 600;
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      gap: 0.6rem;
      transform: translateX(120%);
      transition: transform var(--transition-normal);
      pointer-events: auto;
      max-width: 400px;
    }
    .toast.show { transform: translateX(0); }
    .toast svg { width: 19px; height: 19px; flex-shrink: 0; }
    .toast.toast-success { border-left: 3px solid var(--success); }
    .toast.toast-success svg { color: var(--success); }
    .toast.toast-error { border-left: 3px solid var(--danger); }
    .toast.toast-error svg { color: var(--danger); }
    .toast.toast-info { border-left: 3px solid var(--primary); }
    .toast.toast-info svg { color: var(--primary); }

    /* ==========================================================================
       PIE DE PÁGINA
       ========================================================================== */
    .app-footer {
      border-top: 1px solid var(--border-color);
      background-color: var(--bg-surface);
      padding: 1.25rem 1.5rem;
      margin-top: 2.5rem;
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .footer-container {
      max-width: 1560px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1.2rem;
    }
    .footer-col-left {
      display: flex;
      flex-direction: column;
      gap: 0.25rem;
    }
    .footer-brand-line {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: var(--text-main);
    }
    .version-badge {
      display: inline-flex;
      align-items: center;
      background: var(--primary-subtle);
      border: 1px solid var(--primary-glow);
      color: var(--primary);
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.76rem;
      font-weight: 700;
      padding: 0.12rem 0.5rem;
      border-radius: var(--radius-sm);
    }
    .footer-tagline {
      font-size: 0.82rem;
      color: var(--text-dim);
    }
    .footer-col-center {
      font-size: 0.84rem;
      color: var(--text-dim);
      text-align: center;
      max-width: 450px;
    }
    .footer-col-right {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      flex-wrap: wrap;
    }
    .footer-credits-label {
      font-size: 0.84rem;
      color: var(--text-dim);
    }
    .author-interactive {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      background: var(--bg-surface-elevated);
      border: 1px solid var(--border-color);
      color: var(--primary);
      font-family: inherit;
      font-size: 0.86rem;
      font-weight: 600;
      padding: 0.25rem 0.75rem;
      border-radius: var(--radius-full);
      cursor: pointer;
      transition: all var(--transition-fast);
      outline: none;
      user-select: none;
    }
    .author-interactive:hover {
      background: var(--primary-subtle);
      border-color: var(--primary);
      color: var(--primary);
      box-shadow: 0 0 14px var(--primary-glow);
      transform: translateY(-1px);
    }
    .author-interactive:active {
      transform: translateY(0);
    }
    .author-interactive.inclusive-active {
      background: var(--accent-subtle);
      border-color: var(--accent);
      color: var(--accent);
      box-shadow: 0 0 14px rgba(139, 92, 246, 0.35);
    }
    .author-sparkle {
      font-size: 0.9em;
      display: inline-block;
      transition: transform var(--transition-fast);
    }
    .author-interactive:hover .author-sparkle {
      transform: rotate(15deg) scale(1.15);
    }

    @media (max-width: 768px) {
      .app-main { padding: 0.85rem; }
      .header-container { flex-direction: column; align-items: stretch; }
      .header-actions { justify-content: space-between; }
      .cards-grid { grid-template-columns: 1fr; }
      .search-main-row { flex-wrap: wrap; }
      .btn-toggle-drawer { flex: 1; }
    }

    /* ==========================================================================
       TOOLTIPS ACCESIBLES (Subfase 1.3)
       Burbuja única reutilizada para todos los elementos [data-tooltip],
       posicionada dinámicamente por TooltipManager en app.js.
       ========================================================================== */
    [data-tooltip] {
      cursor: pointer;
    }
    select[data-tooltip],
    .card-command-box[data-tooltip],
    .related-count-badge[data-tooltip],
    .proc-checkbox[data-tooltip],
    .storage-status[data-tooltip] {
      cursor: default;
    }

    .tooltip-bubble {
      position: fixed;
      top: 0;
      left: 0;
      z-index: 130;
      max-width: 260px;
      padding: 0.4rem 0.7rem;
      background-color: var(--bg-surface-elevated, #1e293b);
      color: var(--text-main);
      border: 1px solid var(--border-color-light);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-lg);
      font-size: 0.8rem;
      font-weight: 500;
      line-height: 1.35;
      pointer-events: none;
      opacity: 0;
      transform: translateY(4px);
      transition: opacity var(--transition-fast), transform var(--transition-fast);
    }

    .tooltip-bubble.visible {
      opacity: 1;
      transform: translateY(0);
    }

    @media (max-width: 640px) {
      .tooltip-bubble { display: none; }
    }