/* =========== LIQUID GLASS — Brillo especular en superficies flotantes =========== */
    /* Principio: toda superficie glass flotante tiene specular highlight (como iOS 26) */
    .header::before, .menu-panel::before, .modal-sheet::before,
    .celebration-glass-card::before, .auth-form::before,
    .mobile-input-card::before {
      content: '';
      position: absolute; inset: 0;
      background: var(--glass-shine);
      pointer-events: none;
      z-index: 1;
      border-radius: inherit;
      transition: opacity 320ms ease;
    }
    /* Asegurar position:relative en los contenedores para el pseudo-element */
    .modal-sheet, .auth-form, .mobile-input-card { position: relative; }
    .auth-form, .mobile-input-card { overflow: hidden; }
    .modal-sheet { overflow-y: auto; overflow-x: hidden; }
    .header, .menu-panel { overflow: hidden; } /* position ya definido arriba (sticky/fixed); solo necesitan overflow:hidden para ::before */
    /* Durante morph: specular invisible, aparece suavemente al finalizar */
    .lg-morphing::before { opacity: 0 !important; }

    /* Fallbacks de accesibilidad (@supports, prefers-reduced-transparency/motion) definidos más abajo */

    /* Tema claro: ajustes de contraste */
    [data-theme="light"] .header {
      background: var(--glass-header);
      border-bottom: 1px solid rgba(0,0,0,0.08);
      box-shadow: 0 2px 12px rgba(80,60,140,0.06);
    }
    [data-theme="light"] .menu-panel {
      background: var(--glass-panel);
      border-left: 1px solid rgba(0,0,0,0.08);
    }
    [data-theme="light"] .ex-row,
    [data-theme="light"] .admin-card,
    [data-theme="light"] .student-card,
    [data-theme="light"] .lib-card,
    [data-theme="light"] .cal-stat {
      background: var(--glass-card);
    }
    [data-theme="light"] .modal-sheet {
      background: var(--glass-modal);
    }
    [data-theme="light"] .modal-overlay,
    [data-theme="light"] .mobile-input-overlay {
      background: var(--glass-overlay);
      backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
    }
    [data-theme="light"] .modal-sheet {
      box-shadow: 0 20px 48px rgba(80,60,140,0.12);
    }
    [data-theme="light"] .mobile-input-card {
      background: var(--glass-panel);
      box-shadow: 0 16px 48px rgba(80,60,140,0.10);
    }
    [data-theme="light"] .auth-form {
      background: rgba(255,255,255,0.35);
    }
    [data-theme="light"] .menu-header {
      border-bottom-color: rgba(0,0,0,0.08);
    }
    [data-theme="light"] .menu-footer {
      border-top-color: rgba(0,0,0,0.08);
    }
    [data-theme="light"] .editor-fixed-bar {
      background: var(--glass-editor);
      box-shadow: 0 -2px 16px rgba(0,0,0,0.06);
    }
    /* admin-danger light override ya definido arriba */
    [data-theme="light"] .admin-input {
      background: var(--card);
      border-color: rgba(0,0,0,0.1);
    }
    [data-theme="light"] .admin-input:focus {
      border-color: #7189a8;
    }
    [data-theme="light"] .tag-dropdown {
      background: var(--card);
      border-color: rgba(0,0,0,0.08);
      box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    }
    [data-theme="light"] .set-input {
      background: var(--card);
      border-color: rgba(0,0,0,0.1);
    }
    [data-theme="light"] .header-btn {
      border-color: rgba(0,0,0,0.12);
      color: var(--text2);
    }
    [data-theme="light"] .video-close {
      background: rgba(255,255,255,0.15);
      border-color: rgba(255,255,255,0.2);
    }
    [data-theme="light"] .tpl-add-exercise,
    [data-theme="light"] .add-set-btn {
      border-color: rgba(0,0,0,0.12);
      color: var(--text3);
    }
    [data-theme="light"] .ex-check {
      border-color: rgba(0,0,0,0.15);
    }
    [data-theme="light"] .celebration-overlay {
      background: var(--glass-modal);
    }
    [data-theme="light"] .celebration-glass-card {
      background: rgba(255,255,255,0.65);
      box-shadow: 0 16px 56px rgba(80,60,140,0.12), inset 0 1px 0 rgba(255,255,255,0.5);
    }
    [data-theme="light"] .celebration-stat {
      background: rgba(0,0,0,0.04);
    }
    [data-theme="light"] .celebration-overlay .celebration-close {
      color: #fff;
    }
    [data-theme="light"] .tpl-day-card,
    [data-theme="light"] .tpl-superset {
      background: var(--glass-card);
    }
    [data-theme="light"] .tpl-superset-header {
      background: rgba(0,0,0,0.03);
    }
    [data-theme="light"] .tpl-day-header {
      border-bottom-color: rgba(0,0,0,0.06);
    }
    [data-theme="light"] .cat-pill {
      background: var(--card);
      border-color: rgba(0,0,0,0.1);
    }
    [data-theme="light"] .cat-pill.active {
      border-color: var(--green);
      color: var(--green);
      background: rgba(107,155,150,0.08);
    }
    [data-theme="light"] .menu-overlay {
      background: rgba(0,0,0,0.25);
    }

    /* ===== Liquid Glass Search ===== */
    .lg-search {
      position: relative;
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 0 16px;
      height: 46px;
      border-radius: 14px;
      background: var(--glass-card);
      backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
      -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
      border: 1px solid var(--glass-border);
      box-shadow: 0 2px 12px rgba(0,0,0,0.12);
      overflow: hidden;
      transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
      margin-bottom: 8px;
    }
    .lg-search::before {
      content: '';
      position: absolute;
      inset: 0;
      border-radius: inherit;
      background: linear-gradient(135deg, rgba(255,255,255,0.08) 0%, transparent 40%);
      pointer-events: none;
    }
    .lg-search-icon {
      width: 18px; height: 18px; flex-shrink: 0;
      stroke: var(--text3); stroke-width: 2; fill: none;
      stroke-linecap: round; stroke-linejoin: round;
      transition: stroke 0.2s;
    }
    .lg-search-input {
      flex: 1; background: none; border: none; outline: none;
      color: var(--text); font-family: inherit;
      font-size: 14px; font-weight: 500; letter-spacing: 0.3px;
      padding: 0; min-width: 0;
    }
    .lg-search-input::placeholder { color: var(--text3); font-weight: 400; }
    .lg-search-clear {
      width: 18px; height: 18px; border-radius: 50%; border: none;
      background: var(--text3); color: var(--bg);
      font-size: 11px; font-weight: 700; cursor: pointer;
      display: none; align-items: center; justify-content: center;
      flex-shrink: 0; padding: 0; line-height: 1;
      transition: all 0.2s;
    }
    .lg-search.has-value .lg-search-clear { display: flex; }
    .lg-search:focus-within {
      border-color: rgba(113,137,168,0.4);
      box-shadow: 0 2px 16px rgba(0,0,0,0.18), 0 0 0 2px rgba(113,137,168,0.1);
    }
    .lg-search:focus-within .lg-search-icon { stroke: var(--text2); }
    [data-theme="light"] .lg-search {
      box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    }
    [data-theme="light"] .lg-search::before {
      background: linear-gradient(135deg, rgba(255,255,255,0.3) 0%, transparent 40%);
    }
    [data-theme="light"] .lg-search:focus-within {
      box-shadow: 0 2px 12px rgba(0,0,0,0.1), 0 0 0 2px rgba(113,137,168,0.12);
    }

    /* =========== LIQUID GLASS — Accesibilidad =========== */
    @supports not (backdrop-filter: blur(1px)) {
      .header, .menu-panel, .toast, .dopa-toast, .modal-sheet, .mobile-input-card,
      .auth-form, .editor-fixed-bar, .celebration-overlay, .celebration-glass-card,
      .tpl-day-card, .tpl-superset, .ex-row, .admin-card, .cal-stat,
      .student-card, .lib-card, .orm-modal-card, .rpe-guide-sheet,
      .assign-sheet, .timer-overlay, .csel-dropdown {
        backdrop-filter: none; -webkit-backdrop-filter: none;
        background: var(--card);
      }
      .aurora-bg { display: none; }
    }
    @media (prefers-reduced-transparency) {
      .header, .menu-panel, .toast, .dopa-toast, .modal-sheet, .mobile-input-card,
      .auth-form, .editor-fixed-bar, .celebration-overlay, .celebration-glass-card,
      .tpl-day-card, .tpl-superset, .ex-row, .admin-card, .cal-stat,
      .student-card, .lib-card, .orm-modal-card, .rpe-guide-sheet,
      .assign-sheet, .timer-overlay, .csel-dropdown {
        backdrop-filter: none; -webkit-backdrop-filter: none;
        background: var(--card); border: 1px solid var(--border);
      }
      .aurora-bg { display: none; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
    }

    /* =========================================================
       ESTADÍSTICAS — Panel superadmin
    ========================================================= */

    /* Tabs internas del panel de stats */
    .stats-tabs {
      display: flex;
      gap: 6px;
      margin-bottom: 20px;
      border-bottom: 1px solid var(--border);
      padding-bottom: 12px;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      scrollbar-width: none;
    }
    .stats-tabs::-webkit-scrollbar { display: none; }
    .stats-tab-btn { flex-shrink: 0; position: relative; }
    .stats-tab-btn {
      background: none;
      border: 1px solid transparent;
      border-radius: var(--rs);
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 500;
      color: var(--text2);
      cursor: pointer;
      transition: all 0.15s;
    }
    .stats-tab-btn.active {
      background: var(--card);
      border-color: var(--border);
      color: var(--text);
    }

    /* KPI cards del overview — 2 columnas en mobile, 3 en desktop */
    .stats-kpi-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
      margin-bottom: 20px;
    }
    @media (min-width: 600px) {
      .stats-kpi-grid { grid-template-columns: repeat(3, 1fr); }
    }
    .stats-kpi-card {
      background: var(--glass-card);
      backdrop-filter: blur(var(--glass-blur));
      -webkit-backdrop-filter: blur(var(--glass-blur));
      border: 1px solid var(--glass-border);
      border-radius: var(--r);
      padding: 14px 16px;
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .stats-kpi-value {
      font-size: 28px;
      font-weight: 800;
      line-height: 1;
      color: var(--text);
    }
    .stats-kpi-label {
      font-size: 11px;
      color: var(--text2);
      text-transform: uppercase;
      letter-spacing: 0.4px;
    }
    .stats-kpi-delta {
      font-size: 11px;
      font-weight: 600;
      margin-top: 2px;
    }
    .stats-kpi-delta.up   { color: var(--green); }
    .stats-kpi-delta.down { color: var(--red); }
    .stats-kpi-delta.flat { color: var(--text3); }

    /* Sección con título */
    .stats-section {
      margin-bottom: 24px;
    }
    .stats-section-title {
      font-size: 14px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      color: var(--text3);
      margin-bottom: 10px;
    }

    /* Selector de período */
    .stats-period-row {
      display: flex;
      gap: 6px;
      margin-bottom: 16px;
    }
    .stats-period-btn {
      background: none;
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 4px 12px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text2);
      cursor: pointer;
      transition: all 0.15s;
    }
    .stats-period-btn.active {
      background: var(--text);
      color: var(--bg);
      border-color: var(--text);
    }

    /* Barra de ranking (timer) */
    .stats-ranking-item {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 8px 0;
      border-bottom: 1px solid var(--border);
    }
    .stats-ranking-item:last-child { border-bottom: none; }
    .stats-ranking-num {
      font-size: 11px;
      font-weight: 700;
      color: var(--text3);
      width: 20px;
      text-align: center;
      flex-shrink: 0;
    }
    .stats-ranking-name {
      flex: 1;
      font-size: 13px;
      font-weight: 500;
      color: var(--text);
      min-width: 0;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .stats-ranking-val {
      font-size: 13px;
      font-weight: 700;
      color: var(--green);
      flex-shrink: 0;
    }
    .stats-ranking-sub {
      font-size: 11px;
      color: var(--text3);
      flex-shrink: 0;
    }

    /* Gráfico de barras — horas (CSS puro, sin librerías) */
    .stats-bar-chart {
      display: flex;
      align-items: flex-end;
      gap: 3px;
      height: 80px;
      padding: 0 2px;
    }
    .stats-bar-col {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 3px;
      height: 100%;
      justify-content: flex-end;
    }
    .stats-bar-fill {
      width: 100%;
      border-radius: 3px 3px 0 0;
      background: var(--green);
      opacity: 0.7;
      min-height: 2px;
      transition: height 0.3s ease;
    }
    .stats-bar-fill.peak { opacity: 1; background: var(--green); }
    .stats-bar-fill--grow { transform-origin: bottom; animation: statsBarGrow 0.5s cubic-bezier(0.34,1.1,0.64,1) both; }
    @keyframes statsBarGrow { from { transform: scaleY(0); } to { transform: scaleY(1); } }
    @media (prefers-reduced-motion: reduce) { .stats-bar-fill--grow { animation: none; } }
    .stats-bar-label {
      font-size: 8px;
      color: var(--text3);
      text-align: center;
    }
    .stats-bar-x-labels {
      display: flex;
      gap: 3px;
      padding: 0 2px;
      margin-top: 2px;
    }
    .stats-bar-x-label {
      flex: 1;
      font-size: 8px;
      color: var(--text3);
      text-align: center;
    }

    /* Donut CSS para dispositivos */
    .stats-donut-row {
      display: flex;
      gap: 16px;
      align-items: center;
      flex-wrap: wrap;
    }
    .stats-donut-legend {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .stats-donut-legend-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text);
    }
    .stats-donut-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      flex-shrink: 0;
    }

    /* Tabla de alumnas */
    .stats-alumnas-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 14px;
    }
    .stats-alumnas-table th {
      text-align: left;
      color: var(--text3);
      font-size: 10px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.4px;
      padding: 6px 8px;
      border-bottom: 1px solid var(--border);
    }
    .stats-alumnas-table td {
      padding: 8px 8px;
      border-bottom: 1px solid var(--border);
      color: var(--text);
      vertical-align: middle;
    }
    .stats-alumnas-table tr:last-child td { border-bottom: none; }
    @media (hover: hover) { .stats-alumnas-table tr:hover td { background: var(--card-h); } }
    .stats-alumnas-table--sm { font-size: 11px; }
    .stats-alumnas-table--xs { font-size: 10px; }

    .stats-sess-row { cursor: pointer; }
    .stats-sess-row.is-open td { background: var(--card-h); }
    .stats-caret {
      display: inline-block;
      color: var(--text3);
      font-weight: 700;
      transition: transform .18s ease;
    }
    .stats-sess-row.is-open .stats-caret { transform: rotate(90deg); color: var(--text2); }
    .stats-trail-row td { background: var(--card-h); }
    .stats-trail-label {
      font-size: 10px;
      text-transform: uppercase;
      letter-spacing: 0.4px;
      color: var(--text3);
      font-weight: 700;
      margin-bottom: 6px;
    }
    .stats-trail {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    .stats-trail-chip {
      font-size: 11px;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: 3px 9px;
      color: var(--text2);
      white-space: nowrap;
    }
    .stats-trail-chip b { color: var(--text); font-weight: 600; }
    .stats-trail-chip--idle {
      border-style: dashed;
      background: transparent;
      color: var(--text3);
    }
    .stats-trail-chip--idle b { color: var(--text2); font-weight: 600; }

    .stats-os-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 5px 0;
      border-bottom: 1px solid var(--border);
      font-size: 14px;
    }

    .stats-pers-pill {
      font-size: 10px;
      background: var(--bg2);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 5px 8px;
    }
    .stats-pers-pill--truncate {
      max-width: 100%;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
      display: block;
    }

    /* Badge de riesgo */
    .stats-risk-badge {
      display: inline-block;
      padding: 2px 7px;
      border-radius: 10px;
      font-size: 10px;
      font-weight: 700;
    }
    .stats-risk-badge.rojo   { background: rgba(255,68,68,0.15); color: var(--red); }
    .stats-risk-badge.amarillo { background: rgba(255,200,0,0.15); color: #f0b800; }
    .stats-risk-badge.verde  { background: rgba(107,155,150,0.15); color: var(--green); }

    /* Icono de dispositivo */
    .stats-device-icon { font-size: 14px; }

    /* Contenedor con scroll horizontal para la tabla en mobile */
    .stats-table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

    /* Estado vacío / cargando */
    .stats-empty {
      text-align: center;
      color: var(--text3);
      font-size: 13px;
      padding: 32px 16px;
    }