:root {
            --transition-smooth: all 0.32s cubic-bezier(0.22, 1, 0.36, 1);
            --radius-lg: 22px; --radius-md: 16px; --radius-sm: 12px;
            --radius-icon: 14px;
            --shadow-quiet: 0 1px 2px rgba(15, 23, 42, 0.03), 0 10px 28px rgba(15, 23, 42, 0.04);
            --tooltip-bg: #6b7280;
            --tooltip-fg: #f8fafc;
            font-size: 16px;
            --font-brand-weight: 500;
            /* Alineación óptica locked (Manual §2) */
            --brand-gap: 0.38rem;
            --brand-text-nudge: -0.11em;
            --brand-mark-nudge: calc(-2% + 1px);
            --brand-mark-nudge-circle: calc(-3% + 1px);
        }

        html[data-lupa="on"] { font-size: 21px; }

        /* Tema Claro */
        body { 
            --bg-main: #f8f9fb; 
            --bg-card: #ffffff; 
            --text-main: #0c1520; 
            --text-muted: #64748b; 
            --border: #ebeff3;
            --border-dashed: #cfd6de;
            --accent: #0a5f8c; 
            --accent-bg: rgba(10, 95, 140, 0.06); 
            --accent-shadow: rgba(10, 95, 140, 0.10); 
            --nav-bg: rgba(255, 255, 255, 0.88);

            --semantic-success: #1a7a4a;
            --semantic-warning: #96650a;
            --semantic-danger: #8f3f37;
            --semantic-info: #1d5bbf;
        }

        /* Tema Oscuro — acentos calmados (paleta JS puede sobrescribir) */
        body[data-theme="dark"] { 
            --bg-main: #090a0f; 
            --bg-card: #12141a; 
            --text-main: #f1f5f9; 
            --text-muted: #8b9aab; 
            --border: rgba(255, 255, 255, 0.07);
            --border-dashed: rgba(255, 255, 255, 0.22);
            --accent: #6b9bc8; 
            --accent-bg: rgba(107, 155, 200, 0.12); 
            --accent-shadow: rgba(107, 155, 200, 0.16); 
            --nav-bg: rgba(9, 10, 15, 0.88);
            --shadow-quiet: 0 1px 2px rgba(0, 0, 0, 0.22), 0 12px 32px rgba(0, 0, 0, 0.28);

            --semantic-success: #7bc4a0;
            --semantic-warning: #d4b06a;
            --semantic-danger: #bf736b;
            --semantic-info: #6b9bc8;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Manrope', sans-serif; }
        body { background-color: var(--bg-main); color: var(--text-main); line-height: 1.6; transition: var(--transition-smooth); overflow-x: hidden; }
        .hidden { display: none !important; }

        /* --- PRELOADER DE MARCA --- */
        #brandPreloader { position: fixed; inset: 0; background: var(--bg-main); z-index: 9999; display: flex; flex-direction: column; align-items: center; justify-content: center; transition: opacity 0.4s ease; }
        .preloader-icon { width: 4rem; height: 4rem; color: var(--accent); animation: pulseLogo 1.5s cubic-bezier(0.4, 0, 0.2, 1) infinite; }
        .preloader-icon svg { width: 100%; height: 100%; display: block; transform: translateY(var(--brand-mark-nudge-circle)); }
        .logo-rotate-vector { transform: rotate(-35deg); transform-origin: 12px 12px; }
        @keyframes pulseLogo { 0%, 100% { transform: scale(1); opacity: 1; } 50% { transform: scale(0.9); opacity: 0.7; } }

        /* --- NAVEGACIÓN SUPERIOR --- */
        .top-nav { position: fixed; top: 0; left: 0; width: 100%; height: 4.15rem; background: var(--nav-bg); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent); z-index: 1000; display: flex; align-items: center; transition: var(--transition-smooth); }
        .nav-container { width: 100%; padding: 0 2.5rem; display: flex; justify-content: flex-start; align-items: center; gap: 1rem; position: relative; }
        /* Escritorio: Admin izq · logo centro · acciones der */
        .nav-left { display: flex; align-items: center; gap: 1rem; position: relative; z-index: 2; }
        .brand-logo {
            position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
            z-index: 1; max-width: min(42vw, 18rem); justify-content: center;
            font-size: 1.1rem; font-weight: 600; color: var(--text-main); text-decoration: none;
            display: flex; align-items: center; gap: var(--brand-gap); letter-spacing: -0.02em; line-height: 1;
        }
        .brand-logo span { transform: none; }
        .brand-logo #navAcademyName {
            max-width: min(36vw, 14rem); overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
        }
        .brand-icon { width: 2.2rem; height: 2.2rem; background: var(--accent-bg); color: var(--accent); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1rem; font-weight: 700; overflow: hidden; transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1), background-color 0.32s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.32s cubic-bezier(0.22, 1, 0.36, 1), color 0.32s cubic-bezier(0.22, 1, 0.36, 1); border: 1px solid color-mix(in srgb, var(--border) 80%, transparent); flex-shrink: 0; }
        .brand-icon:has(img),
        .brand-icon.has-logo,
        .brand-icon.has-photo {
            background: transparent !important;
            border: none !important;
        }
        .brand-icon svg { width: 70%; height: 70%; display: block; transform: translateY(calc(var(--brand-mark-nudge-circle) + 2px)); }
        .brand-icon img { width: 100%; height: 100%; object-fit: contain; display: block; }

        /* Fallback A dentro del círculo de academia (no lockup plataforma) */
        .brand-icon .brand-mark {
            width: 70%;
            height: 70%;
            -webkit-mask-size: contain;
            mask-size: contain;
        }

        .nav-actions { display: flex; align-items: center; gap: 0.75rem; margin-left: auto; position: relative; z-index: 2; }
        .action-btn { background: transparent; border: none; color: var(--text-muted); cursor: pointer; display: flex; align-items: center; justify-content: center; width: 2.5rem; height: 2.5rem; border-radius: var(--radius-icon); transition: var(--transition-smooth); }
        .action-btn:hover { background: var(--accent-bg); color: var(--accent); }
        .action-btn svg { width: 1.25rem; height: 1.25rem; stroke-width: 2; fill: none; stroke: currentColor; }

        .btn-nav-primary { background: var(--text-main); color: var(--bg-main); padding: 0.5rem 1.25rem; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.85rem; text-decoration: none; transition: var(--transition-smooth); border: none; cursor: pointer; min-height: 2.75rem; display: inline-flex; align-items: center; justify-content: center; box-shadow: none; }
        body[data-theme="dark"] .btn-nav-primary { color: #090a0f; }
        .btn-nav-primary:hover { opacity: 0.96; box-shadow: var(--shadow-quiet); }
        
        .btn-nav-secondary { background: transparent; color: var(--text-main); border: 1px solid color-mix(in srgb, var(--border) 85%, transparent); padding: 0.5rem 1rem; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.85rem; text-decoration: none; transition: var(--transition-smooth); display: inline-flex; align-items: center; gap: 0.5rem; min-height: 2.75rem; }
        .btn-nav-secondary:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); box-shadow: var(--shadow-quiet); }

        
        .nav-icon-btn {
            display: none;
            align-items: center; justify-content: center;
            width: 2.75rem; height: 2.75rem; min-width: 2.75rem; min-height: 2.75rem;
            padding: 0; border-radius: var(--radius-icon);
            border: 1px solid transparent; background: transparent;
            color: var(--text-main); text-decoration: none; cursor: pointer;
            transition: var(--transition-smooth); flex-shrink: 0;
        }
        .nav-icon-btn svg { width: 1.35rem; height: 1.35rem; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
        .nav-icon-btn:hover { color: var(--accent); background: var(--accent-bg); border-color: color-mix(in srgb, var(--accent) 25%, transparent); }

        /* Header: íconos laterales mismo tono (no muted vs main mezclados) */
        .top-nav .action-btn,
        .top-nav .nav-icon-btn,
        .top-nav .btn-nav-secondary.nav-icon-only,
        .top-nav .btn-back,
        .top-nav .btn-admin-left,
        .top-nav #btnBackToCatalog,
        .top-nav #btnBackHub,
        .top-nav #btnAdminLeft {
            color: var(--text-main);
        }
        .top-nav .action-btn:hover,
        .top-nav .nav-icon-btn:hover,
        .top-nav .btn-nav-secondary.nav-icon-only:hover,
        .top-nav .btn-back:hover,
        .top-nav .btn-admin-left:hover {
            color: var(--accent);
        }
        .nav-btn-label { display: inline; }
        /* Header: ícono (o ícono+texto) sin borde en reposo — mismo criterio que .action-btn */
        .btn-nav-secondary.nav-icon-only {
            gap: 0.5rem;
            border-color: transparent;
            background: transparent;
        }
        .btn-nav-secondary.nav-icon-only svg {
            width: 1.15rem;
            height: 1.15rem;
            flex-shrink: 0;
            stroke: currentColor;
            fill: none;
            display: block;
        }
        .btn-nav-secondary.nav-icon-only:hover {
            border-color: color-mix(in srgb, var(--accent) 25%, transparent);
            color: var(--accent);
            background: var(--accent-bg);
        }

        .mobile-menu-btn { display: none; background: transparent; border: none; color: var(--text-main); cursor: pointer; padding: 0.5rem; min-height: 2.75rem; min-width: 2.75rem; align-items: center; justify-content: center; z-index: 1001; }
        .mobile-menu-btn svg { width: 1.5rem; height: 1.5rem; stroke-width: 2; }

        /* --- MENÚ MÓVIL: modal flotante + blur --- */
        .mobile-overlay {
            position: fixed; inset: 0; z-index: 1200;
            display: flex; align-items: center; justify-content: center;
            padding: max(1.25rem, env(safe-area-inset-top, 0px)) 1.25rem max(1.25rem, env(safe-area-inset-bottom, 0px));
            background: color-mix(in srgb, var(--bg-main) 48%, transparent);
            backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
            opacity: 0; pointer-events: none;
            transition: opacity 0.28s cubic-bezier(0.22, 1, 0.36, 1);
        }
        .mobile-overlay.active { opacity: 1; pointer-events: auto; }
        .mobile-menu-sheet {
            position: relative;
            width: min(22rem, 100%);
            background: var(--bg-card);
            border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-quiet);
            padding: 4.35rem 1.35rem 1.5rem;
            display: flex; flex-direction: column; align-items: stretch; gap: 0.85rem;
            transform: translateY(12px) scale(0.98);
            transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
        }
        .mobile-overlay.active .mobile-menu-sheet { transform: translateY(0) scale(1); }
        .mobile-menu-close {
            position: absolute; top: 0.65rem; right: 0.65rem;
            width: 2.5rem; height: 2.5rem; border-radius: var(--radius-sm);
            border: 1px solid color-mix(in srgb, var(--border) 85%, transparent);
            background: transparent; color: var(--text-main);
            display: inline-flex; align-items: center; justify-content: center;
            cursor: pointer; transition: var(--transition-smooth);
        }
        .mobile-menu-close:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-bg); }
        .mobile-menu-close svg { width: 1.25rem; height: 1.25rem; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; }
        .mobile-menu-sheet .btn-nav-primary,
        .mobile-menu-sheet .btn-nav-secondary,
        .mobile-menu-sheet .btn-nav-soft,
        .mobile-menu-sheet a.ghost-link {
            width: 100%; max-width: none; box-sizing: border-box;
            justify-content: center; text-align: center;
            font-size: 1rem; padding: 0.9rem 1rem; min-height: 2.85rem;
        }
        .mobile-menu-sheet #mobileAuthArea {
            display: flex; flex-direction: column; align-items: stretch; gap: 0.85rem; width: 100%;
        }
        .mobile-menu-sheet a.ghost-link {
            color: var(--text-main); font-weight: 600; text-decoration: none;
            border: 1px solid color-mix(in srgb, var(--border) 85%, transparent);
            border-radius: var(--radius-sm);
            display: inline-flex; align-items: center;
        }
        .mobile-menu-btn { z-index: 1201; }

        /* --- LAYOUT CENTRAL --- */
        .container {
            max-width: 1350px;
            margin: 5.35rem auto 3.5rem auto;
            padding: 0 2.5rem;
        }

        /* Escritorio: bio izquierda + filtros derecha (misma fila) → más grilla visible */
        /* Toolbar del Hub: Bio (izquierda, max 50%) + Filtros/Herramientas (derecha, max 50%) en 1 sola fila */
        .hub-toolbar {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 1rem 1.5rem;
            flex-wrap: nowrap;
            margin: 0 0 calc(2rem - 2px) 0;
            width: 100%;
        }

        .hub-bio-wrap {
            width: auto;
            max-width: 50%;
            margin: 0;
            flex: 0 1 auto;
            min-width: 0;
        }
        .bio-box.hidden { display: none !important; }

        .bio-box {
            margin: 0;
            background: var(--bg-card);
            border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-quiet);
            display: flex;
            flex-direction: column;
            align-items: stretch;
            padding: 0;
            width: fit-content;
            max-width: 100%;
            box-sizing: border-box;
            transition: var(--transition-smooth);
            overflow: hidden;
        }
        .bio-box.is-open {
            width: 100%;
        }
        .bio-box.bio--solo .bio-details {
            display: none !important;
        }

        .bio-summary {
            display: flex;
            flex-direction: row;
            align-items: center;
            gap: 0.75rem;
            width: 100%;
            padding: 0.65rem 0.95rem;
            margin: 0;
            border: none;
            background: transparent;
            color: inherit;
            font: inherit;
            cursor: pointer;
            text-align: left;
            white-space: nowrap;
            box-sizing: border-box;
        }
        .bio-box.bio--solo .bio-summary {
            cursor: default;
        }
        .bio-summary-text { min-width: 0; flex: 1; text-align: left; white-space: nowrap; }

        .bio-chevron {
            display: block;
            width: 1.15rem;
            height: 1.15rem;
            stroke: var(--text-muted);
            fill: none;
            stroke-width: 2;
            flex-shrink: 0;
            transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .bio-box.bio--solo .bio-chevron {
            display: none !important;
        }
        .bio-box.is-open .bio-chevron {
            transform: rotate(180deg);
        }

        .instructor-avatar {
            width: 2.85rem;
            height: 2.85rem;
            border-radius: 50%;
            background: var(--accent-bg);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            font-weight: 600;
            border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
            overflow: hidden;
            flex-shrink: 0;
        }
        .instructor-avatar:has(img),
        .instructor-avatar.has-img {
            background: transparent !important;
            border: none !important;
        }
        .instructor-avatar img { width: 100%; height: 100%; object-fit: cover; }

        .instructor-name {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.3;
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .bio-details {
            display: none;
            flex-direction: column;
            gap: 0.75rem;
            width: 100%;
            padding: 0.25rem 0.95rem 0.85rem 0.95rem;
            border-left: none;
            box-sizing: border-box;
            text-align: left;
        }
        .bio-box.is-open .bio-details {
            display: flex !important;
        }

        .bio-text {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.45;
            margin: 0;
            text-align: left;
            width: 100%;
            max-width: 100%;
        }
        .bio-text.hidden { display: none !important; }

        .bio-links {
            display: flex;
            gap: 0.4rem;
            align-items: center;
            flex-wrap: wrap;
            justify-content: flex-start;
            width: 100%;
        }
        .bio-links:empty { display: none; }

        .contact-link-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            background: transparent;
            border: 1px solid color-mix(in srgb, var(--border) 85%, transparent);
            color: var(--text-muted);
            padding: 0.3rem 0.65rem;
            border-radius: var(--radius-sm);
            font-size: 0.75rem;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition-smooth);
            min-height: 1.85rem;
        }
        .contact-link-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }
        .contact-link-btn svg { width: 0.85rem; height: 0.85rem; stroke: currentColor; fill: none; stroke-width: 2; flex-shrink: 0; }
        .contact-link-btn svg [fill="currentColor"] { stroke: none !important; }

        /* --- FILTROS (segmentados) — en desktop van a la derecha de la bio --- */
        .hub-catalog-controls {
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 0.65rem;
            flex: 0 1 auto;
            min-width: 0;
            max-width: 50%;
        }
        .filter-tabs {
            display: flex; justify-content: flex-end; margin: 0;
            flex: 0 1 auto; width: 100%;
        }
        .filter-tabs.hidden { display: none !important; }
        .filter-tabs-inner {
            display: flex; flex-wrap: wrap; gap: 2px; padding: 4px;
            background: color-mix(in srgb, var(--text-muted) 8%, var(--bg-card));
            border-radius: var(--radius-sm); max-width: 100%;
            margin-left: auto;
        }
        .filter-btn {
            background: transparent; border: none; color: var(--text-muted);
            padding: 0.5rem 1.05rem; border-radius: calc(var(--radius-sm) - 3px); cursor: pointer;
            font-size: 0.88rem; font-weight: 600; transition: var(--transition-smooth);
            min-height: 2.5rem; min-width: 2.75rem; font-family: inherit;
        }
        .filter-btn:hover { color: var(--accent); background: var(--accent-bg); }
        .filter-btn.active {
            background: var(--bg-card); color: var(--accent);
            box-shadow: var(--shadow-quiet);
        }
        body[data-theme="dark"] .filter-btn.active {
            background: color-mix(in srgb, var(--bg-card) 80%, #fff 8%);
        }

        .hub-list-tools {
            display: flex;
            flex-wrap: nowrap;
            gap: 0.5rem;
            justify-content: flex-end;
            align-items: center;
            width: 100%;
            min-width: 0;
        }
        .hub-list-tools.hidden { display: none !important; }
        .hub-search-wrap {
            flex: 1 1 auto;
            max-width: 22rem;
            min-width: 9.5rem;
        }
        .hub-search-wrap.hidden,
        .hub-select-wrap.hidden,
        .hub-orden-wrap.hidden { display: none !important; }
        .hub-select-wrap {
            flex: 0 1 10rem;
            max-width: 11.25rem;
            min-width: 8.5rem;
        }
        .hub-orden-wrap {
            flex: 0 0 auto;
        }
        .hub-search-input {
            width: 100%;
            padding: 0.65rem 1rem;
            border-radius: var(--radius-sm);
            border: 1px solid color-mix(in srgb, var(--border) 85%, transparent);
            background: var(--bg-card);
            color: var(--text-main);
            font-family: inherit;
            font-size: 0.9rem;
            font-weight: 500;
            min-height: 2.5rem;
            outline: none;
            transition: var(--transition-smooth);
            box-sizing: border-box;
        }
        .hub-search-input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px var(--accent-bg);
        }
        .hub-orden-btn {
            width: 2.5rem;
            height: 2.5rem;
            min-width: 2.5rem;
            padding: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            border: 1px solid color-mix(in srgb, var(--border) 85%, transparent);
            background: var(--bg-card);
            color: var(--text-muted);
            cursor: pointer;
            transition: var(--transition-smooth);
        }
        .hub-orden-btn:hover {
            color: var(--accent);
            border-color: var(--accent);
            background: var(--accent-bg);
        }
        .hub-orden-btn[aria-pressed="true"] {
            color: var(--accent);
            border-color: color-mix(in srgb, var(--accent) 40%, transparent);
            background: var(--accent-bg);
        }
        .hub-orden-btn svg {
            width: 1.15rem;
            height: 1.15rem;
            stroke: currentColor;
            fill: none;
            stroke-width: 2;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        /* Desplegable de marca (mismo que admin) */
        .hub-select-wrap .form-input,
        .cs-select-trigger.form-input {
            width: 100%;
            padding: 0.65rem 1rem;
            border-radius: var(--radius-sm);
            border: 1px solid color-mix(in srgb, var(--border) 85%, transparent);
            background: var(--bg-card);
            color: var(--text-main);
            font-family: inherit;
            font-size: 0.9rem;
            font-weight: 500;
            min-height: 2.5rem;
            outline: none;
            box-sizing: border-box;
        }
        .cs-select-wrapper { position: relative; width: 100%; min-width: 0; box-sizing: border-box; }
        .cs-select-wrapper.hidden { display: none !important; }
        .cs-select-trigger {
            display: flex; align-items: center; gap: 0.5rem; cursor: pointer;
            position: relative; padding-right: 2.35rem !important; user-select: none;
            background-image: none !important;
        }
        .cs-select-trigger.cs-select-disabled { opacity: 0.6; cursor: not-allowed; }
        .cs-select-label {
            flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
            line-height: 1.35;
        }
        .cs-select-chevron {
            position: absolute; right: 0.85rem; top: 50%; transform: translateY(-50%);
            color: var(--text-muted); flex-shrink: 0; pointer-events: none;
            transition: transform 0.2s ease;
        }
        .cs-select-wrapper.open .cs-select-chevron { transform: translateY(-50%) rotate(180deg); }
        .cs-select-wrapper.open .cs-select-trigger {
            border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-bg); background: var(--bg-card);
        }
        .cs-select-panel {
            display: none; position: fixed; z-index: 1200;
            background: var(--bg-card); border: 1px solid var(--border);
            border-radius: var(--radius-sm); box-shadow: 0 12px 36px rgba(0,0,0,0.14);
            padding: 6px; overflow-y: auto; overscroll-behavior: contain;
            box-sizing: border-box;
        }
        .cs-select-wrapper.open .cs-select-panel { display: block; }
        body > .cs-select-panel { display: block; }
        .cs-select-group {
            display: flex; align-items: center; gap: 0.5rem;
            padding: 0.65rem 0.9rem;
            font-size: 0.9rem; font-weight: 600;
            color: var(--text-main);
            user-select: none;
            border-radius: 8px;
            letter-spacing: -0.01em;
        }
        .cs-select-group.clickable {
            cursor: pointer;
            transition: background 0.15s ease, color 0.15s ease;
        }
        .cs-select-group.clickable:hover {
            background: var(--accent-bg); color: var(--accent);
        }
        .cs-select-group.selected {
            background: var(--accent-bg); color: var(--accent);
        }
        /* Hijos: sangría suave + línea casi invisible */
        .cs-select-children {
            margin: 0 0 0.15rem 0.55rem;
            padding: 0.05rem 0 0.1rem 0.4rem;
            border-left: 1px solid color-mix(in srgb, var(--border) 55%, transparent);
        }
        .cs-select-option {
            display: flex; align-items: center; gap: 0.5rem;
            padding: 0.55rem 0.85rem; border-radius: 8px; cursor: pointer;
            font-size: 0.9rem; color: var(--text-main); transition: background 0.15s ease;
        }
        .cs-select-option.indented {
            padding: 0.45rem 0.65rem;
            font-weight: 500;
            color: color-mix(in srgb, var(--text-main) 92%, var(--text-muted));
        }
        .cs-select-option > span {
            min-width: 0; white-space: nowrap;
        }
        .cs-select-option:hover { background: var(--accent-bg); color: var(--accent); }
        .cs-select-option.selected { background: var(--accent-bg); color: var(--accent); font-weight: 600; }
        .cs-select-option.disabled { opacity: 0.45; cursor: not-allowed; }
        .cs-select-empty { padding: 0.85rem; font-size: 0.85rem; color: var(--text-muted); text-align: center; }

        /* --- GRID DE CURSOS --- */
        .course-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.75rem; width: 100%; align-items: stretch; }
        
        .course-card { background: var(--bg-card); border: 1px solid color-mix(in srgb, var(--border) 80%, transparent); border-radius: var(--radius-lg); overflow: hidden; display: flex; flex-direction: column; height: 100%; box-shadow: var(--shadow-quiet); transition: var(--transition-smooth); color: inherit; min-height: 0; position: relative; }
        .course-card:hover { box-shadow: var(--shadow-quiet); border-color: color-mix(in srgb, var(--accent) 35%, var(--border)); }
        
        .course-thumbnail { position: relative; aspect-ratio: 16/9; background: var(--accent-bg); display: block; cursor: pointer; overflow: hidden; border-bottom: 1px solid color-mix(in srgb, var(--border) 75%, transparent); flex-shrink: 0; }
        .course-thumbnail img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
        .course-thumbnail svg { position: absolute; inset: 0; margin: auto; width: 2.5rem; height: 2.5rem; color: var(--accent); }
        .book-card .course-thumbnail { background: #F5F5F4; border-bottom: none; }
        .book-card .course-thumbnail img {
            object-fit: contain;
            top: -1px; right: -1px; bottom: -1px; left: -1px;
            width: calc(100% + 2px); height: calc(100% + 2px);
        }
        
        .course-body { padding: 1.25rem 1.4rem 1.15rem; display: flex; flex-direction: column; flex: 1 1 auto; min-height: 0; }
        .course-copy { display: flex; flex-direction: column; flex: 1 1 auto; min-height: 0; text-decoration: none; color: inherit; }
        
        .badge-category-overlay {
            position: absolute;
            top: 0.65rem;
            left: 0.65rem;
            z-index: 3;
            padding: 0.20rem 0.60rem;
            border-radius: 999px;
            font-size: 0.72rem;
            font-weight: 600;
            line-height: 1.2;
            box-sizing: border-box;
            letter-spacing: -0.01em;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            background: rgba(255, 255, 255, 0.88);
            color: #0c1520;
            box-shadow: 0 2px 8px rgba(15, 23, 42, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.4);
        }
        body[data-theme="dark"] .badge-category-overlay {
            background: rgba(18, 20, 26, 0.85);
            color: #f1f5f9;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }

        .badge { display: inline-flex; align-items: center; justify-content: center; gap: 4px; background: color-mix(in srgb, var(--accent) 8%, var(--bg-card)); color: var(--accent); padding: 0.32rem 0.75rem; border-radius: var(--radius-icon); font-size: 0.78rem; font-weight: 500; text-transform: none; letter-spacing: -0.01em; border: none; height: fit-content; white-space: nowrap; margin-bottom: 0.85rem; width: fit-content; }
        
        .course-title {
            font-size: 1.2rem; font-weight: 500; color: var(--text-main); margin: 0 0 1rem;
            line-height: 1.35; letter-spacing: -0.02em; cursor: pointer; transition: var(--transition-smooth);
            display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; line-clamp: 2;
            overflow: hidden;
        }
        .course-title:hover { color: var(--accent); }
        
        /* Misma tipografía / clamp / ritmo que admin; reserva 2 líneas → misma altura de tarjeta */
        .course-desc {
            font-size: 0.95rem; color: var(--text-muted); margin: 0; line-height: 1.5;
            display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; line-clamp: 2;
            overflow: hidden; text-overflow: ellipsis;
            min-height: calc(0.95rem * 1.5 * 2);
        }
        .course-desc:empty::before { content: '\00a0'; }
        
        /* pie = admin .course-card-actions (padding-top 1rem); una sola fila = misma altura con/sin progreso */
        .course-actions {
            margin-top: auto;
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding-top: 0.85rem;
        }
        .card-footer-unenrolled {
            display: flex; justify-content: space-between; align-items: center;
            width: 100%; gap: 0.75rem; border-top: none; padding: 0; margin: 0;
        }
        .card-footer-enrolled {
            display: flex; justify-content: space-between; align-items: center;
            width: 100%; gap: 1.375rem; border-top: none; padding: 0; margin: 0;
        }
        .card-footer-enrolled .hub-progress-container { flex: 1 1 auto; min-width: 0; }
        .card-footer-enrolled .btn-continue { width: auto; flex-shrink: 0; }
        
        .price-tag { font-size: 1.1rem; font-weight: 700; color: var(--text-main); display: flex; align-items: baseline; gap: 0.25rem; letter-spacing: -0.02em; }
        .currency-tag { font-size: 0.75rem; font-weight: 600; color: var(--text-muted); }
        
        .btn-info { background: transparent; color: var(--text-main); border: 1px solid color-mix(in srgb, var(--border) 85%, transparent); padding: 0.35rem 0.55rem; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.85rem; text-align: center; transition: var(--transition-smooth); text-decoration: none; min-height: 2.35rem; min-width: 8.5rem; display: inline-flex; align-items: center; justify-content: center; box-sizing: border-box; }
        .btn-info:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); box-shadow: var(--shadow-quiet); }

        .hub-progress-container { margin: 0; display: flex; flex-direction: column; justify-content: center; gap: 0.3rem; }
        .hub-progress-text { font-size: 0.72rem; color: var(--text-muted); font-weight: 600; display: flex; justify-content: space-between; letter-spacing: 0.01em; line-height: 1.2; }
        .hub-progress-bg { width: 100%; height: 6px; background: rgba(0,0,0,0.05); border-radius: 999px; overflow: hidden; }
        body[data-theme="dark"] .hub-progress-bg { background: rgba(255,255,255,0.05); }
        .hub-progress-fill { height: 100%; background: var(--semantic-success); border-radius: 999px; transition: width 0.5s ease-in-out; }
        
        /* Mismo alto y ancho mínimo que .btn-info (Obtener acceso / Ver información / Continuar) — padding chico para que “Continuar” no se vea vacío */
        .btn-continue { background: var(--accent); color: var(--bg-main); padding: 0.35rem 0.55rem; border-radius: var(--radius-sm); font-weight: 600; font-size: 0.85rem; text-align: center; transition: var(--transition-smooth); width: 100%; display: inline-flex; align-items: center; justify-content: center; text-decoration: none; min-height: 2.35rem; min-width: 8.5rem; box-shadow: none; box-sizing: border-box; }
        body[data-theme="dark"] .btn-continue { color: #090a0f; }
        .btn-continue:hover { box-shadow: var(--shadow-quiet); opacity: 0.96; }

        /* ESTADO VACÍO */
        .empty-state { text-align: center; padding: 3rem 1.5rem; background: var(--bg-card); border: 2px dashed var(--border-dashed); border-radius: var(--radius-lg); grid-column: 1 / -1; box-shadow: none; }
        .empty-state svg { width: 3rem; height: 3rem; color: var(--text-muted); margin-bottom: 1rem; opacity: 0.5; stroke-width: 1.5; fill: none; stroke: currentColor; }
        .empty-state h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 0.5rem; color: var(--text-main); }
        .empty-state p { font-size: 0.9rem; color: var(--text-muted); max-width: 28rem; margin: 0 auto; }

        /* --- FLOTANTES (tema: abajo-izquierda) --- */
        .theme-toggle-floating { position: fixed; bottom: 1.15rem; left: 1.15rem; width: 2.75rem; height: 2.75rem; border-radius: 50%; background: var(--bg-card); border: 1px solid color-mix(in srgb, var(--border) 80%, transparent); color: var(--text-main); display: flex; align-items: center; justify-content: center; cursor: pointer; box-shadow: var(--shadow-quiet); z-index: 1000; transition: var(--transition-smooth); }
        .theme-toggle-floating:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-bg); }
        .theme-toggle-floating svg { width: 1.25rem; height: 1.25rem; stroke-width: 2; stroke: currentColor; fill: none; }

        /* --- RESPONSIVE: bio compacta + expandible; toolbar en columna --- */
        @media (max-width: 900px) {
            .badge-category-overlay {
                top: 0.5rem;
                left: 0.5rem;
                padding: 0.16rem 0.50rem;
                font-size: 0.68rem;
                line-height: 1.2;
                box-sizing: border-box;
            }
            .mobile-menu-btn, .mobile-overlay { display: none !important; }
            .nav-container { position: relative; padding: 0 1rem; min-height: 2.5rem; }
            .nav-left { position: relative; z-index: 2; min-width: 2.75rem; gap: 0.35rem; }
            .brand-logo {
                position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
                z-index: 1; max-width: calc(100% - 7.5rem); justify-content: center;
            }
            #navAcademyName, .brand-logo > span:not(.brand-icon):not(.brand-mark) {
                max-width: min(42vw, 11rem); overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
            }
            .nav-actions { position: relative; z-index: 2; margin-left: auto; gap: 0.25rem; }
            #btnInstallApp { display: none !important; }
            .nav-btn-label { display: none !important; }
            .btn-nav-secondary.nav-icon-only,
            #btnAdminLeft.btn-nav-secondary,
            #btnBackToCatalog.btn-nav-secondary,
            #btnBackHub.btn-nav-secondary,
            .btn-admin-left, .btn-back {
                width: 2.5rem; min-width: 2.5rem; height: 2.5rem; padding: 0;
                border-radius: var(--radius-icon); justify-content: center; gap: 0;
            }
            #btnAdminLeft svg, #btnBackToCatalog svg, #btnBackHub svg,
            .btn-admin-left svg, .btn-back svg { width: 1.3rem; height: 1.3rem; }
            .nav-actions .btn-nav-primary,
            .nav-actions .btn-nav-secondary:not(.nav-icon-only) { display: none !important; }
            .nav-actions .action-btn { display: inline-flex; }
            .nav-icon-btn { display: inline-flex; }
            #authBtnArea { display: flex; align-items: center; gap: 0.25rem; }
            #authBtnArea .nav-icon-btn { display: inline-flex; }
            #navLogoutBtn { display: none !important; }

            /* Admin: ícono a la izquierda (solo si no está .hidden) */
            #btnAdminLeft.hidden { display: none !important; }
            #btnAdminLeft:not(.hidden) { display: inline-flex !important; }
            .container { padding: 0 1.5rem; margin-top: calc(4.15rem + 1rem + env(safe-area-inset-top, 0px)); }


            .course-card { min-height: 0; }
            .course-title { margin-bottom: calc(0.85rem - 8px); }
            .course-actions { padding-top: calc(0.85rem - 5px); }
            .theme-toggle-floating { bottom: 1rem; left: 1rem; width: 2.75rem; height: 2.75rem; }
        }

        @media (min-width: 601px) and (max-width: 1100px) {
            .course-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 600px) {
            .hub-toolbar {
                flex-direction: column;
                align-items: stretch;
                gap: 0.85rem;
                margin-bottom: 1.35rem;
            }
            .hub-bio-wrap {
                max-width: 100%;
                width: 100%;
            }
            .bio-box {
                width: 100%;
            }
            .hub-catalog-controls {
                max-width: 100%;
                width: 100%;
                align-items: stretch;
            }
            .filter-tabs {
                justify-content: stretch;
                width: 100%;
            }
            .filter-tabs-inner { width: 100%; margin-left: 0; }
            .filter-btn { flex: 1 1 auto; text-align: center; }
            .course-grid { grid-template-columns: 1fr; gap: 1.5rem; }
        }
    
        @media (max-width: 520px) {
            .card-footer-unenrolled { flex-direction: row; align-items: center; justify-content: space-between; gap: 0.65rem; }
            .card-footer-enrolled { flex-direction: row; align-items: center; gap: 1rem; }
            .btn-info, .btn-continue { min-width: 0; width: auto; }
            .card-footer-enrolled .btn-continue { width: auto; }
            .card-footer-unenrolled .btn-info { width: auto; }
            .filter-btn { font-size: 0.75rem; padding: 0.45rem 0.5rem; }
            .hub-list-tools { flex-wrap: wrap; gap: 0.5rem; }
            .hub-search-wrap { flex: 1 1 100%; max-width: 100%; }
            .hub-select-wrap { flex: 1 1 0px; min-width: 0; max-width: 100%; }
            .hub-orden-wrap { flex: 0 0 auto; }
            .hub-search-wrap:has(~ .hub-select-wrap.hidden) { flex: 1 1 0px; }
        }

        @media (max-height: 500px) and (orientation: landscape) {
            .container { margin-top: calc(4.15rem + 1rem + env(safe-area-inset-top, 0px)); }
            .hub-toolbar { margin-bottom: 1rem; }
            .bio-summary { min-height: 3rem; padding: 0.65rem 0.85rem; }
        }
        @supports (padding: env(safe-area-inset-bottom)) {
            .theme-toggle-floating {
                bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
                left: calc(1rem + env(safe-area-inset-left, 0px));
            }
        }
        @supports (padding: env(safe-area-inset-top)) {
            .top-nav {
                height: calc(4.15rem + env(safe-area-inset-top, 0px));
                padding-top: env(safe-area-inset-top, 0px);
            }
        }