/**
 * Campus Virtual CDPE — Centro del Saber Empresarial
 * Diseño Editorial de Alta Gama:
 * - Image 1: Estantería 3D cálida en lienzo flotante crema con libro 3D, widget de mentor y reproductor de vinilo.
 * - Image 2: Ficha de detalle editorial minimalista estilo Gestalten con aura circular, tipografía serif y columna 'EXPAND BOOKSHELF'.
 * - Image 3: Lector Flipbook estilo cuaderno ejecutivo 'StrongMe' con cubierta pastel, 3 anillas metálicas y páginas de diario.
 */

:root {
    /* Paleta Editorial Inspirada en Image 1, 2 y 3 */
    --canvas-bg: #f5eee3;         /* Fondo exterior cálido de lienzo */
    --card-surface: #ffffff;      /* Superficie interior limpia */
    --card-surface-soft: #faf7f2; /* Crema suave para paneles */
    --shelf-white: #ffffff;       /* Repisa arquitectónica blanca */
    --ink-black: #1a1715;         /* Tinta principal editorial */
    --ink-gray: #4a453e;          /* Tinta secundaria */
    --ink-subtle: #787168;        /* Tinta tenue / metadatos */
    --border-light: #ece6dc;      /* Bordes suaves de separación */
    --accent-camel: #d89b42;      /* Mostaza / Cuero cálido (Image 1 Mentor) */
    --accent-camel-hover: #c48932;
    --accent-navy: #0e2744;       /* Azul corporativo CDPE */
    --accent-gold: #c28e2b;       /* Dorado prestigioso */
    --binder-blue: #d6e8f8;       /* Azul pastel de la cubierta del cuaderno (Image 3) */
    --binder-border: #b8d7f2;     /* Borde del cuaderno */
    
    /* Tipografías */
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-display: 'Outfit', sans-serif;

    /* Sombras y Elevaciones */
    --shadow-canvas: 0 40px 100px -20px rgba(50, 40, 30, 0.15), 0 10px 30px rgba(0, 0, 0, 0.04);
    --shadow-shelf: 0 18px 30px -8px rgba(35, 25, 15, 0.12), 0 4px 8px rgba(0, 0, 0, 0.04);
    --shadow-book-3d: -16px 24px 38px -6px rgba(25, 20, 15, 0.38), -2px 4px 10px rgba(0,0,0,0.15);
    --shadow-card: 0 12px 30px -6px rgba(40, 30, 20, 0.08);
}

/* Reset y Base */
* {
    box-sizing: border-box;
}

body {
    background-color: var(--canvas-bg);
    color: var(--ink-black);
    font-family: var(--font-sans);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

/* ========================================================
   1. HEADER SUPERIOR MINIMALISTA & RESPONSIVO
   ======================================================== */
.editorial-topbar {
    max-width: 1320px;
    margin: 1.25rem auto 1.25rem;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.85rem;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

.brand-editorial {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--ink-black);
    flex-shrink: 0;
}

.brand-editorial img {
    height: 38px;
    width: auto;
    object-fit: contain;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.brand-editorial:hover img {
    transform: scale(1.04);
}

.brand-campus-title {
    font-family: 'Outfit', 'Plus Jakarta Sans', var(--font-sans), sans-serif;
    font-size: 1.22rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--ink-black);
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 0.32rem;
    line-height: 1;
    white-space: nowrap;
}

.brand-campus-title .brand-campus-accent {
    color: var(--accent-camel);
    font-weight: 800;
}

.brand-logo-text {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.45rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.brand-logo-sub {
    font-size: 0.75rem;
    color: var(--ink-subtle);
    font-weight: 600;
    letter-spacing: 0.05em;
    display: block;
}

/* Selector Central de Escalones (Estilo Capsule Pills Image 1) - Totalmente Responsivo */
.format-toggle-pills {
    display: flex;
    align-items: center;
    background: #e8e0d3;
    padding: 0.25rem 0.3rem;
    border-radius: 999px;
    gap: 0.18rem;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    max-width: 100%;
}

.format-toggle-pills::-webkit-scrollbar {
    display: none;
}

.pill-btn {
    border: none;
    background: transparent;
    padding: 0.36rem 0.68rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--ink-gray);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    font-family: var(--font-sans);
    white-space: nowrap;
    flex-shrink: 0;
}

.pill-btn:hover {
    color: var(--ink-black);
    background: rgba(255, 255, 255, 0.35);
}

.pill-btn.active {
    background: var(--accent-camel);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(216, 155, 66, 0.35);
}

.pill-btn:not(:has(span)) {
    padding: 0.36rem 0.62rem;
    min-width: 34px;
    justify-content: center;
}

.topbar-right-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
}

.topbar-right-actions .btn {
    padding: 0.38rem 0.75rem;
    font-size: 0.78rem;
}

/* Reglas Responsivas de la Barra Superior */
@media (max-width: 1220px) {
    .editorial-topbar {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        row-gap: 0.75rem;
        padding: 0.75rem 1rem;
        margin: 0.5rem auto 1rem;
    }
    .brand-editorial {
        order: 1;
    }
    .topbar-right-actions {
        order: 2;
    }
    .format-toggle-pills {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        padding: 0.35rem 0.5rem;
        box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.06);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x mandatory;
        scrollbar-width: none;
    }
    .format-toggle-pills::-webkit-scrollbar {
        display: none;
    }
}

@media (max-width: 640px) {
    .editorial-topbar {
        padding: 0.5rem 0.75rem;
        row-gap: 0.65rem;
        margin: 0.25rem auto 0.75rem;
    }
    .brand-editorial img {
        height: 30px;
    }
    .topbar-right-actions {
        gap: 0.35rem;
    }
    .topbar-right-actions .btn {
        padding: 0.35rem 0.65rem;
        font-size: 0.75rem;
        border-radius: 999px;
    }
    .pill-btn {
        padding: 0.38rem 0.72rem;
        font-size: 0.74rem;
        flex-shrink: 0;
        scroll-snap-align: start;
    }
}

@media (max-width: 480px) {
    .btn-topbar-label {
        display: none;
    }
    .editorial-topbar .btn {
        padding: 0.35rem 0.55rem;
    }
}

.btn-icon-pill {
    background: #ffffff;
    border: 1px solid var(--border-light);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--ink-black);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}
.btn-icon-pill:hover {
    background: #f8f5f0;
    transform: translateY(-1px);
}

.btn-classroom-pill {
    background: #ffffff;
    border: 1px solid var(--border-light);
    padding: 0.45rem 1.1rem;
    border-radius: 999px;
    font-size: 0.84rem;
    font-weight: 700;
    color: #0f5132;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}
.btn-classroom-pill:hover {
    background: #eef7ee;
    border-color: #a3cfbb;
}

/* ========================================================
   2. EL LIENZO PRINCIPAL & ESTANTERÍA 3D (IMAGE 1)
   ======================================================== */
.bookshelf-main-stage {
    max-width: 1320px;
    margin: 0 auto 3rem;
    padding: 0 1.5rem;
}

.stage-canvas-card {
    background: var(--card-surface);
    border-radius: 40px;
    box-shadow: var(--shadow-canvas);
    padding: 2.85rem 3.25rem 2.85rem;
    position: relative;
    overflow: hidden;
    border: 1px solid #f0eae1;
}

/* Barra Superior Interna de la Tarjeta Lienzo (Image 1 Header) */
.stage-canvas-topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.15rem;
    padding-bottom: 0.5rem;
}

.stage-canvas-brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.stage-canvas-brand .brand-campus-title {
    font-family: 'Outfit', 'Plus Jakarta Sans', var(--font-sans), sans-serif;
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: -0.035em;
    color: var(--ink-black);
    text-transform: uppercase;
    display: inline-flex;
    align-items: center;
    gap: 0.38rem;
    line-height: 1;
}

.stage-canvas-brand .brand-campus-accent {
    color: var(--accent-camel);
    font-weight: 800;
}

.stage-canvas-toggle {
    display: inline-flex;
    background: #f2ece1;
    padding: 4px;
    border-radius: 999px;
}

.stage-toggle-pill {
    background: transparent;
    border: none;
    padding: 0.45rem 1.15rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 700;
    color: #7a7063;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    transition: all 0.2s ease;
}

.stage-toggle-pill.active {
    background: #cf9e58;
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(207, 158, 88, 0.35);
}

.stage-canvas-actions {
    display: flex;
    align-items: center;
    gap: 1.15rem;
    color: #8c8275;
    font-size: 1.1rem;
}

.stage-user-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    overflow: hidden;
    background: #ffffff;
    border: 2px solid #ecd8be;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stage-user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Fila Superior Hero: New & Trending + 3D Spotlight Book + Mentor + AudioWidget */
.stage-hero-grid {
    display: grid;
    grid-template-columns: 280px 300px 170px 220px;
    gap: 2.25rem;
    align-items: flex-end;
    margin-bottom: 1.15rem;
    padding-bottom: 0;
}

@media (max-width: 1200px) {
    .stage-hero-grid {
        grid-template-columns: 1fr 1fr;
    }
}
@media (max-width: 768px) {
    .bookshelf-main-stage {
        padding: 0 0.85rem;
        margin-bottom: 2rem;
    }
    .stage-canvas-card {
        padding: 1.6rem 1.15rem 1.85rem;
        border-radius: 24px;
    }
    .stage-canvas-topbar {
        margin-bottom: 1.25rem;
    }
    .stage-hero-grid {
        grid-template-columns: 1fr;
        gap: 1.65rem;
        align-items: stretch;
    }
    .trending-hero-info {
        text-align: center;
    }
    .trending-hero-info h2 {
        font-size: clamp(1.4rem, 4.5vw, 1.85rem);
        margin: 0 0 0.5rem;
    }
    .trending-hero-info p {
        font-size: 0.85rem;
        line-height: 1.45;
        margin: 0 0 1rem;
    }
    .spotlight-book-container {
        justify-content: center;
        align-items: center;
        margin: 0.5rem auto 1rem;
    }
    .spotlight-3d-book {
        width: 185px;
        height: 275px;
    }
    .mentor-card-widget, .audio-card-widget {
        max-width: 360px;
        margin: 0 auto;
    }
}

/* Columna 1: Hero Info (MEJORA TU CALIDAD DE VIDA) */
.trending-hero-info h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.12;
    margin: 0 0 0.75rem;
    color: var(--ink-black);
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

.trending-hero-info p {
    font-size: 0.88rem;
    color: var(--ink-subtle);
    margin: 0 0 1.35rem;
    line-height: 1.5;
}

.hero-search-capsule {
    background: #fbf9f5;
    border: 1px solid #e8e2d5;
    border-radius: 999px;
    padding: 0.65rem 1.15rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
}

.hero-search-capsule input {
    border: none;
    background: transparent;
    font-size: 0.88rem;
    color: var(--ink-black);
    width: 100%;
    outline: none;
    font-family: var(--font-sans);
}

/* Columna 2: Libro 3D Spotlight (The Last Thing He Told Me style) */
.spotlight-book-container {
    perspective: 1200px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    position: relative;
    padding-bottom: 0;
    margin-bottom: 0;
}

/* Sombra de contacto ambiental suave en la base de la repisa */
.spotlight-book-container::after {
    content: "";
    position: absolute;
    bottom: 2px;
    width: 175px;
    height: 14px;
    background: radial-gradient(ellipse at center, rgba(20, 15, 10, 0.25) 0%, rgba(20, 15, 10, 0.06) 55%, transparent 75%);
    border-radius: 50%;
    filter: blur(4px);
    pointer-events: none;
    transform: rotate(-3deg);
    transition: opacity 0.35s ease, transform 0.35s ease;
}

.spotlight-book-container:hover::after {
    opacity: 0.5;
    transform: scale(0.92) translateY(6px);
}

.spotlight-3d-book {
    width: 205px;
    height: 305px;
    position: relative;
    transform: rotateY(-18deg) rotateX(4deg);
    transform-style: preserve-3d;
    box-shadow: var(--shadow-book-3d);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
    border-radius: 6px 12px 12px 6px;
    overflow: hidden;
    background: linear-gradient(135deg, #0e2744 0%, #173f6e 100%);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 1.75rem 1.5rem;
}

.spotlight-book-container:hover .spotlight-3d-book {
    transform: rotateY(-8deg) rotateX(2deg) translateY(-8px);
    box-shadow: -22px 30px 48px -4px rgba(25, 20, 15, 0.42);
}

.spotlight-3d-book.has-photo {
    padding: 0 !important;
    background: #06111f !important;
}

.spotlight-cover-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 6px 12px 12px 6px;
}

.spotlight-spine-bevel {
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: 22px;
    background: linear-gradient(to right, rgba(0,0,0,0.65) 0%, rgba(255,255,255,0.3) 20%, rgba(0,0,0,0.2) 50%, rgba(255,255,255,0.08) 80%, transparent 100%);
    z-index: 10;
    pointer-events: none;
}

.spotlight-gloss-sheen {
    position: absolute;
    inset: -50%;
    background: linear-gradient(125deg, transparent 40%, rgba(255,255,255,0.12) 48%, rgba(255,255,255,0.28) 50%, rgba(255,255,255,0.08) 53%, transparent 60%);
    pointer-events: none;
    z-index: 11;
}

/* Lomo y Brillo del Libro 3D */
.spotlight-3d-book::before {
    content: "";
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: 18px;
    background: linear-gradient(to right, rgba(255,255,255,0.4), rgba(0,0,0,0.1) 40%, rgba(255,255,255,0.06) 70%, transparent);
    z-index: 10;
}

/* Páginas laterales cortadas */
.spotlight-3d-book::after {
    content: "";
    position: absolute;
    top: 6px; right: -8px; bottom: 6px;
    width: 10px;
    background: repeating-linear-gradient(to bottom, #f3ede2, #eae2d3 2px, #fbf7ee 4px);
    border-radius: 0 4px 4px 0;
    transform: rotateY(90deg) translateZ(-5px);
    box-shadow: inset 1px 0 2px rgba(0,0,0,0.25);
}

.spotlight-tag {
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: #fcd34d;
    background: rgba(252, 211, 77, 0.15);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    display: inline-block;
}

.spotlight-title {
    font-family: var(--font-serif);
    font-size: 1.45rem;
    font-weight: 700;
    line-height: 1.15;
    margin: 0.6rem 0 0.3rem;
}

.spotlight-author {
    font-size: 0.82rem;
    opacity: 0.85;
    margin: 0;
}

.spotlight-cta {
    font-size: 0.72rem;
    font-weight: 700;
    color: #fcd34d;
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.75rem;
}

/* Contenedores con etiqueta vertical al costado (Image 1 Style) */
.vertical-card-wrapper {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    position: relative;
}

.vertical-side-label {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: #8c8275;
    white-space: nowrap;
    text-transform: capitalize;
}

/* Columna 3: Widget Mentor del Mes (Stephen King Collection style) */
.mentor-card-widget {
    background: var(--accent-camel);
    border-radius: 24px;
    padding: 1.75rem 1.25rem 1.5rem;
    color: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    box-shadow: 0 14px 32px rgba(216, 155, 66, 0.35);
    width: 100%;
}

.mentor-card-widget h4 {
    margin: 0 0 0.25rem;
    font-size: 1.1rem;
    font-family: var(--font-serif);
    font-weight: 700;
}

.mentor-card-widget p {
    margin: 0 0 1.25rem;
    font-size: 0.78rem;
    opacity: 0.9;
}

.mentor-avatar-circle {
    width: 76px;
    height: 76px;
    border-radius: 50%;
    background: #ffffff;
    padding: 4px;
    box-shadow: 0 6px 16px rgba(0,0,0,0.18);
}

.mentor-avatar-circle img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

/* Columna 4: Widget Audiolibro (Vinyl Player style) */
.audio-card-widget {
    background: #ffffff;
    border-radius: 24px;
    padding: 1.5rem 1.25rem;
    border: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    box-shadow: 0 12px 30px rgba(0,0,0,0.04);
    width: 100%;
}

.audio-track-title {
    margin: 0 0 0.15rem;
    font-size: 0.95rem;
    font-family: var(--font-serif);
    color: var(--ink-black);
    font-weight: 700;
}

.audio-track-sub {
    margin: 0 0 1rem;
    font-size: 0.76rem;
    color: var(--ink-subtle);
}

.audio-vinyl-player {
    width: 78px;
    height: 78px;
    border-radius: 50%;
    background: radial-gradient(circle, #2a2826 30%, #151311 70%, #0a0908 100%);
    box-shadow: 0 6px 18px rgba(0,0,0,0.3);
    margin-bottom: 0.85rem;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: 3px solid #f2ede4;
    transition: transform 0.2s ease;
}
.audio-vinyl-player:hover {
    transform: scale(1.05);
}

.audio-vinyl-center {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent-camel);
    border: 2px solid #ffffff;
}

.audio-vinyl-player.is-spinning {
    animation: spinVinyl 6s linear infinite;
}

@keyframes spinVinyl {
    100% { transform: rotate(360deg); }
}

.audio-scrub-bar {
    width: 100%;
    height: 6px;
    background: #ede6da;
    border-radius: 999px;
    margin: 0.65rem 0 0.85rem;
    position: relative;
    cursor: pointer;
}

.audio-scrub-progress {
    width: 0%;
    height: 100%;
    background: var(--accent-camel);
    border-radius: 999px;
    pointer-events: none;
    transition: width 0.1s linear;
}

.audio-scrub-dot {
    position: absolute;
    left: 0%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-camel);
    box-shadow: 0 2px 5px rgba(0,0,0,0.25);
    pointer-events: none;
    transition: left 0.1s linear;
}

.audio-play-pill {
    background: var(--ink-black);
    color: #ffffff;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.2s ease;
}
.audio-play-pill:hover {
    transform: scale(1.1);
}

/* ========================================================
   LA REPISA ARQUITECTÓNICA DE MADERA BLANCA (IMAGE 1 SHELF)
   ======================================================== */
.physical-shelf-container {
    position: relative;
    margin: 0.75rem 0 1.85rem;
    z-index: 10;
}

.architectural-shelf {
    height: 14px;
    background: linear-gradient(180deg, #fefcf9 0%, #f3eee3 60%, #e5dcce 100%);
    position: relative;
    border-radius: 4px;
    border-top: 1px solid rgba(255, 255, 255, 0.95);
    border-bottom: 1.5px solid #d2c5b2;
    box-shadow: 
        0 4px 10px rgba(45, 30, 20, 0.05),
        0 10px 22px rgba(45, 30, 20, 0.04);
}

.architectural-shelf::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(to right, rgba(255,255,255,0.6), rgba(255,255,255,0.95) 20%, rgba(255,255,255,0.95) 80%, rgba(255,255,255,0.6));
    border-radius: 4px 4px 0 0;
}

.architectural-shelf::after {
    content: "";
    position: absolute;
    bottom: -1px; left: 0; right: 0;
    height: 1px;
    background: rgba(0, 0, 0, 0.04);
}

.shelf-collection-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.shelf-collection-header h3 {
    font-family: var(--font-serif);
    font-size: 1.45rem;
    margin: 0;
    color: var(--ink-black);
}

.shelf-nav-arrows {
    display: flex;
    gap: 0.5rem;
}

.shelf-arrow-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-light);
    background: #ffffff;
    color: var(--ink-black);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}
.shelf-arrow-btn:hover {
    background: #fbf9f4;
    border-color: #d89b42;
    color: #d89b42;
}

/* Fila de Libros en la Repisa con Etiqueta Vertical 'Recent Bestsellers' (Image 1 Bottom) */
.shelf-bestsellers-wrapper {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    position: relative;
    padding-top: 0.4rem;
}

.standing-books-scroll-row {
    display: flex;
    gap: 2rem;
    overflow-x: auto;
    padding: 0.65rem 0.5rem 1.15rem;
    scroll-behavior: smooth;
    scrollbar-width: none;
    flex: 1;
}
.standing-books-scroll-row::-webkit-scrollbar {
    display: none;
}

@media (max-width: 768px) {
    .shelf-bestsellers-wrapper {
        flex-direction: column;
        align-items: stretch;
        gap: 0.65rem;
        padding-top: 0.2rem;
    }
    .shelf-bestsellers-wrapper .vertical-side-label {
        writing-mode: horizontal-tb;
        transform: none;
        font-size: 0.78rem;
        font-weight: 800;
        letter-spacing: 0.08em;
        text-transform: uppercase;
        color: #8c8275;
        margin-bottom: 0.25rem;
    }
    .standing-books-scroll-row {
        gap: 1.25rem;
        padding: 0.4rem 0.25rem 0.85rem;
        scroll-snap-type: x mandatory;
    }
    .shelf-book-pair {
        flex: 0 0 255px !important;
        scroll-snap-align: start;
        gap: 0.85rem;
    }
    .shelf-book-pair-cover {
        width: 80px !important;
        height: 118px !important;
    }
}

/* Tarjeta de Libro en Repisa: Lado a Lado (Portada 3D + Info Estilo Image 1) */
.shelf-book-pair {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex: 0 0 310px;
    cursor: pointer;
    transition: transform 0.25s ease;
}

.shelf-book-pair:hover {
    transform: translateY(-5px);
}
.shelf-book-pair-cover-wrap {
    flex-shrink: 0;
    transition: transform 0.25s ease;
}

.shelf-book-pair:hover .shelf-book-pair-cover-wrap {
    transform: translateY(-4px) scale(1.03);
}

.shelf-book-pair-cover {
    width: 100px;
    height: 148px;
    flex-shrink: 0;
    border-radius: 3px 8px 8px 3px;
    box-shadow: -8px 14px 22px rgba(25, 20, 15, 0.22);
    position: relative;
    overflow: hidden;
    color: #ffffff;
    padding: 0.85rem 0.75rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: box-shadow 0.25s ease;
}

.shelf-book-pair-cover::before {
    content: "";
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: 10px;
    background: linear-gradient(to right, rgba(255,255,255,0.4), rgba(0,0,0,0.15) 40%, transparent);
}

.shelf-book-pair-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.shelf-book-pair-stars {
    color: #f59e0b;
    font-size: 0.78rem;
    letter-spacing: 0.1em;
}

.shelf-book-pair-title {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0;
    color: var(--ink-black);
    line-height: 1.25;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.shelf-book-pair-author {
    font-size: 0.78rem;
    color: #8c8275;
    margin: 0 0 0.45rem;
}

.shelf-book-pair-btn {
    background: transparent;
    border: 1px solid #dcd3c4;
    color: #2a2521;
    padding: 0.35rem 0.95rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    cursor: pointer;
    align-self: flex-start;
    transition: all 0.2s ease;
}
.shelf-book-pair-btn:hover {
    background: #1a1715;
    color: #ffffff;
    border-color: #1a1715;
}

/* Soporte de compatibilidad para shelf-book-card */
.shelf-book-card {
    flex: 0 0 210px;
    cursor: pointer;
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}
.shelf-book-card:hover { transform: translateY(-8px); }
.shelf-book-cover-3d {
    width: 190px; height: 270px; border-radius: 4px 10px 10px 4px;
    box-shadow: -8px 14px 24px rgba(25, 20, 15, 0.22);
    position: relative; overflow: hidden; color: #ffffff;
    padding: 1.25rem 1.15rem; display: flex; flex-direction: column; justify-content: space-between;
}
.shelf-book-meta { margin-top: 1rem; }
.shelf-book-stars { color: #d97706; font-size: 0.8rem; margin-bottom: 0.25rem; }
.shelf-book-title { font-family: var(--font-serif); font-size: 1rem; font-weight: 700; margin: 0 0 0.2rem; color: var(--ink-black); line-height: 1.3; }
.shelf-book-author { font-size: 0.78rem; color: var(--ink-subtle); margin: 0 0 0.65rem; }
.btn-buy-now-pill {
    background: #ffffff; border: 1px solid #dfd8cc; padding: 0.35rem 0.85rem; border-radius: 999px;
    font-size: 0.76rem; font-weight: 700; color: var(--ink-black); cursor: pointer;
    transition: all 0.2s ease; display: inline-flex; align-items: center; gap: 0.35rem;
}
.btn-buy-now-pill:hover { background: var(--ink-black); color: #ffffff; border-color: var(--ink-black); }

/* ========================================================
   3. FICHA DE DETALLE MINIMALISTA ESTILO GESTALTEN (IMAGE 2)
   ======================================================== */
.detail-modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(26, 23, 21, 0.75);
    backdrop-filter: blur(14px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2500;
    padding: 2rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s ease;
}

.detail-modal-overlay.is-active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.gestalten-detail-card {
    max-width: 1080px;
    width: 100%;
    background: #ffffff;
    border-radius: 28px;
    box-shadow: 0 45px 120px rgba(0, 0, 0, 0.25);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    max-height: 92vh;
}

/* Header Gestalten */
.gestalten-header {
    border-bottom: 1px solid #f0ebe1;
    padding: 1.25rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.84rem;
    color: var(--ink-subtle);
    font-weight: 600;
}

.gestalten-header .brand-title {
    font-family: var(--font-display);
    font-weight: 800;
    color: var(--ink-black);
    letter-spacing: 0.1em;
}

.gestalten-header .btn-close-clean {
    border: none;
    background: transparent;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    cursor: pointer;
    color: var(--ink-black);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.gestalten-header .btn-close-clean:hover {
    color: #e11d48;
}

/* Layout de 3 Columnas Estilo Image 2 */
.gestalten-body-grid {
    display: grid;
    grid-template-columns: 340px 1fr 140px;
    overflow-y: auto;
}

@media (max-width: 992px) {
    .gestalten-body-grid {
        grid-template-columns: 1fr;
    }
}

/* Columna Izquierda: Halo Circular + Libro 3D */
.gestalten-cover-col {
    padding: 3rem 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    background: #fdfbf7;
}

.halo-circle-backdrop {
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: #f2ede4;
    position: absolute;
    z-index: 1;
}

.gestalten-book-3d {
    width: 200px;
    height: 295px;
    border-radius: 4px 10px 10px 4px;
    position: relative;
    z-index: 2;
    padding: 0;
    background: transparent;
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.gestalten-book-3d:hover {
    transform: translateY(-6px) scale(1.03);
}

.click-preview-cta {
    margin-top: 1.75rem;
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-subtle);
    cursor: pointer;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: color 0.2s ease;
}
.click-preview-cta:hover {
    color: var(--ink-black);
}

/* Columna Central: Información Editorial Tipográfica */
.gestalten-content-col {
    padding: 3rem 2.5rem;
    border-right: 1px solid #f0ebe1;
}

.gestalten-title {
    font-family: var(--font-serif);
    font-size: 2.1rem;
    font-weight: 700;
    line-height: 1.15;
    margin: 0 0 0.5rem;
    color: var(--ink-black);
}

.gestalten-byline {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--ink-subtle);
    margin: 0 0 1.5rem;
}

.gestalten-lead-quote {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--ink-gray);
    margin: 0 0 1.5rem;
    padding-left: 1rem;
    border-left: 2px solid var(--accent-camel);
}

.gestalten-synopsis {
    font-size: 0.92rem;
    color: var(--ink-gray);
    line-height: 1.7;
    margin-bottom: 2rem;
}

/* Tabla Minimalista de Metadatos (Image 2 Specs) */
.gestalten-specs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem 2rem;
    margin-bottom: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid #f0ebe1;
}

.spec-entry {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    line-height: 1.4;
}

.spec-entry .label {
    color: var(--ink-subtle);
    font-weight: 500;
}

.spec-entry .value {
    color: var(--ink-black);
    font-weight: 700;
    text-align: right;
}

/* Ficha del Mentor / Reviewer (Image 2 Bottom) */
.gestalten-reviewer-box {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: #fbf9f4;
    padding: 1rem 1.25rem;
    border-radius: 14px;
}

.reviewer-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
}

.reviewer-meta h5 {
    margin: 0;
    font-size: 0.86rem;
    color: var(--ink-black);
}

.reviewer-meta p {
    margin: 0.15rem 0 0;
    font-size: 0.78rem;
    color: var(--ink-subtle);
}

/* Controles de Siguiente / Anterior de Documento */
.gestalten-nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.75rem;
    padding-top: 1.25rem;
    border-top: 1px solid #f0ebe1;
}

.btn-nav-doc {
    background: transparent;
    border: 1px solid #dfd8cc;
    padding: 0.45rem 1rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--ink-black);
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.btn-nav-doc:hover {
    background: var(--ink-black);
    color: #ffffff;
    border-color: var(--ink-black);
}

/* Columna Derecha: 'EXPAND BOOKSHELF' con Referencias Cruzadas */
.gestalten-expand-col {
    padding: 2.5rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    background: #ffffff;
}

.expand-bookshelf-tab {
    position: absolute;
    left: -28px;
    top: 50%;
    transform: translateY(-50%) rotate(90deg);
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--ink-subtle);
    white-space: nowrap;
}

.gestalten-active-box {
    width: 100%;
    background: #fbf9f4;
    border: 1.5px solid #d89b42;
    border-radius: 10px;
    padding: 0.65rem 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.65rem;
    margin-bottom: 0.75rem;
    box-shadow: 0 4px 12px rgba(216, 155, 66, 0.15);
}

.gestalten-active-box .mini-thumb {
    width: 44px;
    height: 60px;
    border-radius: 2px 4px 4px 2px;
    flex-shrink: 0;
    box-shadow: -2px 4px 8px rgba(0, 0, 0, 0.2);
}

.gestalten-active-box .mini-info {
    overflow: hidden;
}

.gestalten-active-box .mini-label {
    font-size: 0.62rem;
    font-weight: 800;
    text-transform: uppercase;
    color: #b45309;
    letter-spacing: 0.05em;
    display: block;
}

.gestalten-active-box .mini-title {
    font-family: var(--font-serif);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--ink-black);
    line-height: 1.2;
    margin: 0.15rem 0 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.crossref-thumbnails-stack {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-top: 1rem;
}

.crossref-thumb-card {
    width: 82px;
    height: 118px;
    border-radius: 4px 8px 8px 4px;
    box-shadow: -4px 8px 16px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    overflow: hidden;
    position: relative;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.crossref-thumb-card:hover {
    transform: translateX(-4px) scale(1.05);
    box-shadow: -6px 12px 22px rgba(0, 0, 0, 0.22);
}

/* ========================================================
   4. LECTOR FLIPBOOK 'STRONGME' CON ANILLAS (IMAGE 3)
   ======================================================== */
.flipbook-modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(20, 24, 30, 0.88);
    backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
    padding: 1.5rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.3s ease;
}

.flipbook-modal-overlay.is-active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* La Carpeta / Cuaderno con Borde Azul Pastel 'StrongMe' */
.strongme-notebook-canvas {
    max-width: 1560px;
    width: 98vw;
    height: 95vh;
    background: var(--binder-blue);
    border: 5px solid var(--binder-border);
    border-radius: 36px;
    box-shadow: 0 40px 100px rgba(0, 0, 0, 0.45);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.strongme-notebook-canvas.is-fullscreen {
    max-width: 100vw;
    width: 100vw;
    height: 100vh;
    border-radius: 0;
    border: none;
}

/* Barra de Pestañas y Controles del Lector */
.strongme-topbar {
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(184, 215, 242, 0.6);
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.strongme-brand-tag {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.92rem;
    font-weight: 800;
    color: var(--accent-navy);
}

.strongme-nav-controls {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.btn-notebook-ctrl {
    background: #ffffff;
    border: 1px solid #c8dcf0;
    padding: 0.4rem 0.95rem;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--accent-navy);
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.btn-notebook-ctrl:hover {
    background: var(--accent-navy);
    color: #ffffff;
    border-color: var(--accent-navy);
}

.notebook-page-indicator {
    font-size: 0.82rem;
    font-weight: 800;
    color: #3b82f6;
    padding: 0 0.5rem;
}

/* Pliego de 2 Páginas con Anillas al Centro (Image 3 Spread) */
.strongme-two-pages-spread {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 50px 1fr;
    padding: 1.25rem 2rem 1.75rem;
    overflow: hidden;
    position: relative;
    background: transparent;
}

@media (max-width: 860px) {
    .strongme-two-pages-spread {
        grid-template-columns: 1fr;
    }
    .strongme-rings-spine {
        display: none !important;
    }
}

/* Hoja Izquierda (Warm White Paper) */
.strongme-left-page {
    background: #ffffff;
    border-radius: 20px 8px 8px 20px;
    padding: 2.25rem 2.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* Encabezado con Sol y Fecha (Image 3 Left) */
.page-weather-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.weather-date-pill {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--ink-black);
}

.weather-date-pill i {
    color: #f59e0b;
    font-size: 1.25rem;
}

/* Foto Polaroid de la Especialidad (Image 3 / 5 Left) */
.polaroid-frame-box {
    background: #ffffff;
    padding: 0.85rem;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid #f0eae1;
    text-align: center;
    margin-bottom: 1.5rem;
}

.polaroid-cover-wrap {
    width: 100%;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    overflow: hidden;
    background: #faf7f2;
    margin-bottom: 0.75rem;
}

.polaroid-cover-wrap img {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
    margin-bottom: 0;
}

.polaroid-cover-wrap .shelf-standing-book-3d {
    transform: scale(0.72);
}

.polaroid-caption {
    font-size: 0.82rem;
    font-style: italic;
    color: var(--ink-gray);
    margin: 0;
}

/* Racha / Dots de Aprendizaje (Image 3 Bottom Left) */
.learning-streak-card {
    text-align: center;
    background: #fbf9f4;
    padding: 0.85rem;
    border-radius: 12px;
}

.streak-days-row {
    display: flex;
    justify-content: center;
    gap: 0.65rem;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--ink-subtle);
    margin-bottom: 0.4rem;
}

.streak-day-badge.active {
    background: #3b82f6;
    color: #ffffff;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.streak-subtext {
    font-size: 0.76rem;
    font-weight: 700;
    color: #10b981;
    margin: 0;
}

/* Columna Central de Anillas Metálicas (Image 3 / 5 Wire Rings) */
.strongme-rings-spine {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    align-items: center;
    padding: 3.5rem 0;
    position: relative;
    z-index: 10;
    width: 50px;
}

.strongme-wire-ring {
    width: 48px;
    height: 18px;
    background: linear-gradient(180deg, #f8fafc 0%, #cbd5e1 35%, #64748b 70%, #334155 100%);
    border-radius: 9px;
    position: relative;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4), inset 0 1px 2px rgba(255, 255, 255, 0.8);
}

.strongme-wire-ring::before,
.strongme-wire-ring::after {
    content: "";
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #0f172a;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.2);
}

.strongme-wire-ring::before {
    left: -8px;
}

.strongme-wire-ring::after {
    right: -8px;
}

/* Hoja Derecha (Ruled Executive Journal Paper) */
.strongme-right-page {
    background: #ffffff;
    border-radius: 8px 20px 20px 8px;
    padding: 2.25rem 2.5rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* Tarjeta Flotante Superior (Savor the Moment style) */
.journal-quote-floating-card {
    background: #fbf9f4;
    border: 1px solid #ece4d7;
    border-radius: 18px;
    padding: 1.25rem 1.5rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
    margin-bottom: 1.5rem;
}

.journal-card-top {
    display: flex;
    justify-content: space-between;
    font-size: 0.76rem;
    font-weight: 700;
    color: var(--ink-subtle);
    margin-bottom: 0.65rem;
}

.journal-quote-text {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--ink-black);
    line-height: 1.45;
    margin: 0 0 0.85rem;
}

.journal-card-actions {
    display: flex;
    gap: 0.85rem;
    color: var(--ink-subtle);
    font-size: 0.9rem;
    cursor: pointer;
}

/* Líneas de Cuaderno / Journal - Prioridad al Contenido */
.notebook-ruled-content {
    background: repeating-linear-gradient(to bottom, transparent, transparent 33px, #e2e8f0 34px);
    line-height: 34px;
    font-size: 0.98rem;
    color: var(--ink-black);
    padding: 0.5rem 0.5rem 1rem 0;
    margin-bottom: 1.25rem;
    min-height: 420px;
    max-height: calc(95vh - 280px);
    overflow-y: auto;
}

.notebook-ruled-content h2,
.notebook-ruled-content h3 {
    margin: 0 0 0.5rem;
    font-family: var(--font-serif);
    font-size: 1.35rem;
    color: var(--accent-navy);
    line-height: 34px;
}

.notebook-action-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #f0ebe1;
    padding-top: 1rem;
}

/* ========================================================
   5. ESCALONES 1 Y 2 EN TARJETAS DE ALTA GAMA
   ======================================================== */
.escalon-section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-tag {
    font-size: 0.76rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent-camel);
    display: inline-block;
    margin-bottom: 0.5rem;
}

.escalon-section-header h2 {
    font-family: var(--font-serif);
    font-size: 2.3rem;
    margin: 0 0 0.5rem;
    color: var(--ink-black);
}

.escalon-section-header p {
    color: var(--ink-subtle);
    font-size: 1rem;
    margin: 0;
}

/* Subtabs Escalón 1 */
.subtab-pills-row {
    display: flex;
    justify-content: center;
    gap: 0.85rem;
    margin-bottom: 2rem;
}

.btn-subtab {
    padding: 0.65rem 1.4rem;
    border-radius: 999px;
    border: 1px solid #dfd8cc;
    background: #ffffff;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--ink-black);
    cursor: pointer;
    transition: all 0.25s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-subtab.active {
    background: var(--ink-black);
    color: #ffffff;
    border-color: var(--ink-black);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
}

@media (max-width: 640px) {
    .subtab-pills-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
        margin-bottom: 1.25rem;
    }
    .btn-subtab {
        padding: 0.65rem 0.5rem;
        font-size: 0.78rem;
        text-align: center;
        justify-content: center;
        white-space: normal;
        line-height: 1.2;
        border-radius: 12px;
    }
}

/* Filtro de Pilares */
.pilar-filters-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.pilar-filters-label {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--ink-dark);
    margin-right: 0.25rem;
    white-space: nowrap;
}

.pilar-filters-track {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

.pilar-filter-pill {
    padding: 0.45rem 1rem;
    border-radius: 999px;
    border: 1px solid #e8e2d5;
    background: #ffffff;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--ink-gray);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.pilar-filter-pill.active {
    background: var(--accent-camel);
    color: #ffffff;
    border-color: var(--accent-camel);
}

@media (max-width: 768px) {
    .pilar-filters-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.45rem;
        margin-bottom: 1.25rem;
    }
    .pilar-filters-track {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        width: 100%;
        justify-content: flex-start;
        padding: 0.25rem 0.15rem 0.65rem;
        gap: 0.45rem;
        scrollbar-width: none;
        scroll-snap-type: x proximity;
    }
    .pilar-filters-track::-webkit-scrollbar {
        display: none;
    }
    .pilar-filter-pill {
        flex-shrink: 0;
        scroll-snap-align: start;
        padding: 0.4rem 0.85rem;
        font-size: 0.78rem;
    }
}

/* Grillas Elegantes */
.manuales-grid-layout, .franchise-grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 1.35rem;
}

.manual-item-card {
    background: #ffffff;
    border-radius: 20px;
    border: 1px solid #f0ebe1;
    box-shadow: 0 8px 24px rgba(40, 30, 20, 0.04);
    overflow: hidden;
    display: flex;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    min-width: 0;
}

.manual-item-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 36px rgba(40, 30, 20, 0.08);
}

.manual-card-spine {
    width: 44px;
    background: var(--accent-navy);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0.25rem;
    flex-shrink: 0;
}

.manual-card-badge {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    opacity: 0.9;
}

.manual-card-body {
    padding: 1.15rem 1.25rem;
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.manual-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--ink-subtle);
    margin-bottom: 0.35rem;
    flex-wrap: wrap;
}

.manual-card-title {
    font-family: var(--font-serif);
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--ink-black);
    margin: 0 0 0.35rem;
    line-height: 1.32;
    cursor: pointer;
    word-break: break-word;
}
.manual-card-title:hover {
    color: var(--accent-camel);
}

.manual-card-sub {
    font-size: 0.81rem;
    color: var(--ink-subtle);
    margin: 0 0 0.85rem;
    line-height: 1.42;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-word;
}

.manual-card-actions {
    display: flex;
    gap: 0.45rem;
    align-items: center;
    flex-wrap: wrap;
    margin-top: auto;
}

.btn-card-action {
    padding: 0.38rem 0.72rem;
    border-radius: 999px;
    font-size: 0.76rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.32rem;
    border: 1px solid transparent;
    white-space: nowrap;
}
.btn-card-action.primary {
    background: #fdf5ea;
    color: #b45309;
    border-color: #fde68a;
}
.btn-card-action.primary:hover {
    background: #b45309;
    color: #ffffff;
}
.btn-card-action.secondary {
    background: #f8fafc;
    color: var(--ink-black);
    border-color: #e2e8f0;
}
.btn-card-action.secondary:hover {
    background: var(--ink-black);
    color: #ffffff;
}
.btn-card-action.ghost {
    background: transparent;
    color: var(--ink-subtle);
    border-color: #e2e8f0;
    padding: 0.38rem 0.55rem;
}
.btn-card-action.ghost:hover {
    background: #f1f5f9;
    color: var(--ink-black);
}

/* Escalón 2: Especialidades */
.specialty-pills-row {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
}

.specialty-pill-btn {
    padding: 0.65rem 1.4rem;
    border-radius: 999px;
    border: 1px solid #dfd8cc;
    background: #ffffff;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--ink-black);
    cursor: pointer;
    transition: all 0.2s ease;
}

.specialty-pill-btn.active {
    background: var(--accent-navy);
    color: #ffffff;
    border-color: var(--accent-navy);
    box-shadow: 0 4px 14px rgba(14, 39, 68, 0.25);
}

.phase-card-item {
    background: #ffffff;
    border-radius: 20px;
    padding: 2rem 2.25rem;
    box-shadow: 0 8px 24px rgba(40, 30, 20, 0.04);
    margin-bottom: 1.75rem;
    border: 1px solid #f0ebe1;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.phase-card-item:hover {
    box-shadow: 0 14px 32px rgba(40, 30, 20, 0.08);
}

.phase-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.phase-badge {
    color: #ffffff;
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    display: inline-block;
    margin-bottom: 0.5rem;
}

.phase-goal {
    font-size: 0.92rem;
    color: var(--ink-gray);
    margin-top: 0.5rem;
    line-height: 1.5;
}

.phase-steps-list {
    background: #faf7f2;
    border-radius: 14px;
    padding: 1.25rem 1.5rem;
    margin: 1.25rem 0;
    font-size: 0.88rem;
    color: var(--ink-black);
}

.phase-steps-list strong {
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--ink-subtle);
    display: block;
    margin-bottom: 0.5rem;
}

.phase-steps-list ul {
    margin: 0;
    padding-left: 1.25rem;
    line-height: 1.7;
}

.roadmap-main-card {
    background: #ffffff;
    padding: 2.5rem;
    border-radius: 24px;
    border: 1px solid var(--border-warm);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.guia-phase-section-wrapper {
    margin-top: 1rem;
    border-top: 1px dashed #cbd5e1;
    padding-top: 0.85rem;
}

.guia-phase-section-title {
    margin: 0 0 0.5rem;
    font-size: 0.82rem;
    text-transform: uppercase;
    color: #475569;
    letter-spacing: 0.04em;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.guia-phase-empty-state {
    margin-top: 0.85rem;
    font-size: 0.82rem;
    color: #94a3b8;
    font-style: italic;
}

.guia-phase-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1.15rem;
    border-radius: 14px;
    background: #ffffff;
    border: 1px solid #ede7db;
    margin-top: 0.75rem;
    gap: 1.25rem;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.guia-phase-row:hover {
    background: #faf7f2;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(30, 20, 10, 0.08);
}

.guia-phase-cover-col {
    flex-shrink: 0;
}

.guia-phase-info-col {
    flex: 1;
    min-width: 0;
}

.guia-phase-title {
    color: #0a2240;
    font-size: 0.95rem;
    display: block;
    margin-bottom: 0.25rem;
}

.guia-phase-sub {
    margin: 0;
    font-size: 0.82rem;
    color: #64748b;
    line-height: 1.4;
}

.guia-phase-actions-col {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
}

/* Escalón 1: 17 Manuales de Franquicia */
.franchise-item-card {
    background: #ffffff;
    border-radius: 20px;
    border: 1px solid #f0ebe1;
    box-shadow: 0 8px 24px rgba(40, 30, 20, 0.04);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.franchise-item-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 16px 36px rgba(40, 30, 20, 0.08);
}

.franchise-card-header {
    padding: 1.5rem 1.5rem 1.25rem;
    color: #ffffff;
    position: relative;
}

.franchise-badge {
    font-size: 0.68rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    background: rgba(255, 255, 255, 0.18);
    backdrop-filter: blur(4px);
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    display: inline-block;
    margin-bottom: 0.6rem;
}

.franchise-card-header h4 {
    margin: 0;
    font-family: var(--font-serif);
    font-size: 1.25rem;
    line-height: 1.3;
}

.franchise-card-content {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.franchise-sub {
    font-size: 0.82rem;
    color: var(--accent-camel);
    font-weight: 700;
    margin: 0 0 0.5rem;
}

.franchise-desc {
    font-size: 0.88rem;
    color: var(--ink-subtle);
    line-height: 1.55;
    margin: 0 0 1.25rem;
}

/* Escalón 0: Autodiagnóstico Editorial de Riesgo */
.diagnostico-card {
    background: #ffffff;
    border-radius: 32px;
    padding: 3rem;
    border: 1px solid #f0eae1;
    box-shadow: var(--shadow-canvas);
    margin-bottom: 2rem;
}

.eje-block {
    margin-bottom: 2rem;
    padding-bottom: 1.75rem;
    border-bottom: 1px solid #f0ebe1;
}

.eje-block:last-of-type {
    border-bottom: none;
    margin-bottom: 1.5rem;
}

.eje-block h4 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin: 0 0 1.25rem;
    color: var(--ink-black);
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.pregunta-item {
    background: #faf7f2;
    border-radius: 16px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .pregunta-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}

.pregunta-titulo {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--ink-black);
    margin: 0;
}

.radio-options {
    display: flex;
    gap: 1rem;
}

.radio-options label {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    background: #ffffff;
    border: 1px solid #ded6c9;
    padding: 0.45rem 1.15rem;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--ink-black);
    cursor: pointer;
    transition: all 0.2s ease;
}

.radio-options label:hover {
    border-color: var(--accent-camel);
}

.radio-options input[type="radio"]:checked + span,
.radio-options label:has(input[type="radio"]:checked) {
    background: var(--ink-black);
    color: #ffffff;
    border-color: var(--ink-black);
}

.diag-btn-submit {
    display: block;
    width: 100%;
    max-width: 320px;
    margin: 2rem auto 0;
    background: var(--accent-camel);
    color: #ffffff;
    border: none;
    padding: 0.95rem 2rem;
    border-radius: 999px;
    font-size: 1rem;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 8px 20px rgba(216, 155, 66, 0.35);
    transition: all 0.25s ease;
}
.diag-btn-submit:hover {
    background: var(--accent-camel-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(216, 155, 66, 0.45);
}

.diag-result-card {
    background: #fbf9f4;
    border: 2px solid #ecd8b8;
    border-radius: 24px;
    padding: 2.25rem;
    margin-top: 2rem;
    text-align: center;
    animation: fadeIn 0.4s ease;
}

.diag-badge {
    color: #ffffff;
    padding: 0.45rem 1.4rem;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 800;
    display: inline-block;
    margin-bottom: 1rem;
}

/* Escalón 3: Laboratorios, Simuladores y Herramientas */
.labs-category-block {
    margin-bottom: 3rem;
}

.labs-category-header {
    margin-bottom: 1.35rem;
    border-bottom: 1px solid #ece5d8;
    padding-bottom: 0.85rem;
}

.labs-category-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-camel);
    background: #fdf6ea;
    border: 1px solid #f3e2c3;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    margin-bottom: 0.4rem;
}

.labs-category-header h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--ink-black);
    margin: 0;
}

.labs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
    gap: 1.5rem;
}

.lab-access-card {
    background: #ffffff;
    border-radius: 22px;
    padding: 2rem 1.85rem;
    border: 1px solid #f0ebe1;
    box-shadow: 0 10px 30px rgba(40, 30, 20, 0.05);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.lab-access-card.lab-card-featured {
    border: 1.5px solid #e2c07d;
    background: linear-gradient(180deg, #fffdf9 0%, #ffffff 100%);
    box-shadow: 0 12px 34px rgba(184, 134, 11, 0.1);
}

.lab-access-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 42px rgba(40, 30, 20, 0.09);
}

.lab-card-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.lab-icon-box {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.45rem;
    margin-bottom: 0;
    flex-shrink: 0;
}

.lab-status-pill {
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.28rem 0.7rem;
    border-radius: 999px;
    background: #f5f2eb;
    color: #5c5449;
    border: 1px solid #e6dfd3;
    white-space: nowrap;
}

.lab-status-pill.pill-live {
    background: #ede9fe;
    color: #6d28d9;
    border-color: #ddd6fe;
}

.lab-access-card h3 {
    font-family: var(--font-serif);
    font-size: 1.32rem;
    margin: 0 0 0.5rem;
    color: var(--ink-black);
    line-height: 1.28;
}

.lab-access-card p {
    font-size: 0.9rem;
    color: var(--ink-subtle);
    line-height: 1.58;
    margin: 0 0 1.5rem;
}

.lab-access-card .btn {
    width: 100%;
    justify-content: center;
    box-sizing: border-box;
}

/* Escalón 4: Certificación Oficial */
.cert-showcase-card {
    background: #ffffff;
    border-radius: 32px;
    padding: 3.5rem;
    border: 1px solid #f0ebe1;
    box-shadow: var(--shadow-canvas);
    display: grid;
    grid-template-columns: 1fr 240px;
    gap: 3rem;
    align-items: center;
}

@media (max-width: 860px) {
    .cert-showcase-card {
        grid-template-columns: 1fr;
        padding: 2rem;
    }
}

.cert-badge-gold {
    background: #fef3c7;
    color: #92400e;
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
    display: inline-block;
    margin-bottom: 0.75rem;
}

.cert-preview-box {
    background: #faf7f2;
    border: 2px dashed #ded6c9;
    border-radius: 20px;
    padding: 1.75rem;
    text-align: center;
}

.qr-mock-placeholder {
    width: 90px;
    height: 90px;
    margin: 0 auto 1rem;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.75rem;
    color: var(--ink-black);
}

/* Google Classroom Modal */
.campus-modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(20, 24, 30, 0.75);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 4000;
    padding: 1.5rem;
}

.campus-modal-card {
    background: #ffffff;
    max-width: 500px;
    width: 100%;
    border-radius: 24px;
    padding: 2.25rem 2.5rem;
    box-shadow: 0 30px 80px rgba(0,0,0,0.3);
    position: relative;
    border: 1px solid #f0ebe1;
}

.modal-close-btn {
    position: absolute;
    top: 1.25rem; right: 1.25rem;
    border: none;
    background: #f4efe6;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--ink-black);
}

.code-display-bubble {
    background: #faf7f2;
    border: 1px solid #e5ded3;
    border-radius: 14px;
    padding: 0.85rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: monospace;
    font-size: 1.1rem;
    font-weight: 700;
    color: #0f5132;
}

/* Botones Base */
.btn-gold {
    background: var(--accent-camel);
    color: #ffffff !important;
    border: none;
    padding: 0.65rem 1.35rem;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    transition: all 0.2s ease;
}
.btn-gold:hover {
    background: var(--accent-camel-hover);
    transform: translateY(-2px);
}

.btn-primary {
    background: var(--accent-navy);
    color: #ffffff !important;
    border: none;
    padding: 0.65rem 1.35rem;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    transition: all 0.2s ease;
}
.btn-primary:hover {
    background: #173f6e;
    transform: translateY(-2px);
}

.btn-classroom {
    background: #0f5132;
    color: #ffffff !important;
    border: none;
    padding: 0.65rem 1.25rem;
    border-radius: 999px;
    font-size: 0.86rem;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    transition: all 0.2s ease;
}
.btn-classroom:hover {
    background: #146c43;
}

/* ========================================================
   6. AJUSTE DE COLOR DEL FOOTER OFICIAL
   ======================================================== */
.footer-wrapper {
    background: #ffffff;
    border-top: 1px solid #e8e2d5;
    margin-top: 5rem;
}

/* ========================================================
   7. DETALLES VISUALES DE ALTA GAMA (SPOTLIGHT, VINILO, ESCALÓN 1)
   ======================================================== */

/* Libro 3D Spotlight: Edición de Lujo Tapa Dura */
.luxury-hardcover-edition {
    background: radial-gradient(circle at 50% 25%, #183b63 0%, #0a1c33 75%, #050e1a 100%) !important;
    padding: 0.85rem !important;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.hardcover-gold-frame {
    width: 100%;
    height: 100%;
    border: 1.5px solid rgba(220, 180, 100, 0.65);
    outline: 1px dashed rgba(220, 180, 100, 0.25);
    outline-offset: -5px;
    border-radius: 4px 8px 8px 4px;
    padding: 1rem 0.85rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.4);
}

.hardcover-top-medallion {
    font-size: 0.6rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    color: #f6d285;
    text-align: center;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
}

.hardcover-body-art {
    text-align: center;
    margin: auto 0;
}

.hardcover-volume-mark {
    font-size: 0.55rem;
    font-weight: 800;
    letter-spacing: 0.2em;
    color: #e5b96f;
    text-transform: uppercase;
    display: block;
    margin-bottom: 0.35rem;
}

.hardcover-book-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.15;
    margin: 0;
    letter-spacing: 0.02em;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.6);
}

.hardcover-book-subtitle {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: #f6d285;
    margin: 0.15rem 0 0.5rem;
    letter-spacing: 0.06em;
}

.hardcover-gold-divider {
    color: #d4af37;
    font-size: 0.75rem;
    margin: 0.3rem 0;
}

.hardcover-book-tagline {
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.82);
    line-height: 1.35;
    margin: 0;
    font-style: italic;
}

.hardcover-bottom-imprint {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid rgba(220, 180, 100, 0.35);
    padding-top: 0.5rem;
    font-size: 0.62rem;
    font-weight: 700;
    color: #f6d285;
    letter-spacing: 0.08em;
}

.hardcover-bookmark-ribbon {
    position: absolute;
    top: 0;
    right: 28px;
    width: 14px;
    height: 48px;
    background: linear-gradient(to bottom, #d97706, #b45309);
    clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 82%, 0 100%);
    box-shadow: -2px 4px 6px rgba(0, 0, 0, 0.35);
    z-index: 15;
}

/* Tarjeta Mentor Ejecutiva (Stephen King Collection style) */
.executive-mentor-edition {
    background: linear-gradient(145deg, #c48c48 0%, #ab7532 100%) !important;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 16px 36px rgba(180, 120, 50, 0.3) !important;
    padding: 1.6rem 1.15rem !important;
}

.mentor-crest-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: #ffffff;
    margin-bottom: 0.75rem;
    box-shadow: 0 6px 14px rgba(0, 0, 0, 0.15);
}

.mentor-tagline {
    font-size: 0.75rem !important;
    opacity: 0.95;
    margin-bottom: 0.85rem !important;
}

.mentor-phase-badge {
    background: rgba(255, 255, 255, 0.22);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.mentor-card-bottom-seal {
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    padding-top: 0.65rem;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}
.mentor-card-bottom-seal span {
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    opacity: 0.85;
}
.mentor-card-bottom-seal strong {
    font-size: 0.72rem;
    letter-spacing: 0.05em;
}

/* Tarjeta Audiolibro Vinilo Luxury */
.vinyl-luxury-edition {
    padding: 1.4rem 1.15rem !important;
}

.vinyl-grooved-realistic {
    width: 82px !important;
    height: 82px !important;
    background: repeating-radial-gradient(circle, #1a1a1a 0, #1a1a1a 2px, #262626 3px, #1a1a1a 4px) !important;
    border: 3px solid #2d2a26 !important;
    box-shadow: 0 8px 22px rgba(0, 0, 0, 0.35) !important;
}

.vinyl-reflection-sheen {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 40%, rgba(255,255,255,0.15) 70%, transparent 100%);
    pointer-events: none;
}

.vinyl-center-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #000000;
    display: block;
    margin: 8px auto 0;
}

.audio-time-row {
    display: flex;
    justify-content: space-between;
    width: 100%;
    font-size: 0.7rem;
    color: var(--ink-subtle);
    font-weight: 600;
    margin: -0.4rem 0 0.85rem;
}

.audio-skip-btn {
    background: transparent;
    border: none;
    color: #8c8275;
    font-size: 0.85rem;
    cursor: pointer;
    transition: color 0.2s;
}
.audio-skip-btn:hover {
    color: var(--ink-black);
}

/* Borde Foil en Libros de Repisa Inferior */
.shelf-cover-foil-border {
    width: 100%;
    height: 100%;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 2px 6px 6px 2px;
    padding: 0.5rem 0.45rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* ========================================================
   REDISEÑO EDITORIAL DE ESCALÓN 1: MINI LIBROS 3D
   ======================================================== */
.manual-item-card {
    background: #ffffff;
    border-radius: 20px;
    border: 1px solid #ede7db;
    box-shadow: 0 8px 24px rgba(40, 30, 20, 0.05);
    overflow: hidden;
    display: flex;
    align-items: stretch;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
    min-width: 0;
}

.manual-item-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 18px 40px rgba(40, 30, 20, 0.12);
    border-color: #d89b42;
}

.manual-card-book-preview {
    padding: 1rem 0.6rem 1rem 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: #fbf9f4;
}

.manual-card-book-preview .shelf-book-pair-cover {
    width: 86px;
    height: 126px;
    padding: 0.65rem 0.55rem;
    box-shadow: -6px 10px 18px rgba(25, 20, 15, 0.22);
}

.mini-book-cover-3d {
    width: 86px;
    height: 124px;
    border-radius: 3px 7px 7px 3px;
    box-shadow: -6px 10px 18px rgba(25, 20, 15, 0.22);
    position: relative;
    overflow: hidden;
    color: #ffffff;
    padding: 0.65rem 0.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.25s ease;
}

.manual-item-card:hover .mini-book-cover-3d {
    transform: rotateY(-6deg) scale(1.04);
}

.mini-book-spine-line {
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: 8px;
    background: linear-gradient(to right, rgba(255,255,255,0.4), rgba(0,0,0,0.15) 50%, transparent);
}

.mini-book-tag {
    font-size: 0.52rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    padding: 0.12rem 0.35rem;
    border-radius: 3px;
    text-transform: uppercase;
    align-self: flex-start;
}

.mini-book-title {
    font-family: var(--font-serif);
    font-size: 0.68rem;
    margin: 0.35rem 0;
    line-height: 1.2;
    color: #ffffff;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.mini-book-meta-bottom {
    font-size: 0.55rem;
    opacity: 0.75;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.manual-card-body {
    padding: 1.15rem 1.25rem;
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.meta-pillar-badge {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.18rem 0.55rem;
    border-radius: 999px;
    letter-spacing: 0.02em;
    max-width: 100%;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.meta-pages-badge {
    font-size: 0.72rem;
    color: var(--ink-subtle);
    font-weight: 600;
    white-space: nowrap;
}

/* ========================================================
   SISTEMA DE PORTADAS EDITORIALES DE LUJO (CAMPUS CDPE)
   ======================================================== */

.luxury-cover-art {
    position: relative;
    border-radius: 4px 10px 10px 4px;
    overflow: hidden;
    color: #ffffff;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.35s ease;
    box-shadow: -8px 14px 24px rgba(20, 15, 10, 0.28);
    user-select: none;
    transform-style: preserve-3d;
}

/* Tamaños de Portada */
.luxury-cover-art.size-large {
    width: 200px;
    height: 295px;
    padding: 0.95rem 0.85rem;
    box-shadow: -14px 22px 38px rgba(18, 12, 8, 0.38);
}

.luxury-cover-art.size-medium {
    width: 96px;
    height: 142px;
    padding: 0.5rem 0.45rem;
    box-shadow: -6px 10px 18px rgba(18, 12, 8, 0.26);
}

.luxury-cover-art.size-thumb {
    width: 60px;
    height: 88px;
    padding: 0.3rem 0.25rem;
    box-shadow: -4px 7px 12px rgba(18, 12, 8, 0.22);
}

/* Modo con Fotografía / Arte Editorial Real */
.luxury-cover-art.has-cover-img {
    padding: 0 !important;
    background: #000;
}

.luxury-cover-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: inherit;
}

/* Lomo físico y bisel de encuadernación */
.luxury-cover-spine {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 12%;
    min-width: 10px;
    max-width: 22px;
    background: linear-gradient(
        to right,
        rgba(0, 0, 0, 0.6) 0%,
        rgba(255, 255, 255, 0.28) 16%,
        rgba(0, 0, 0, 0.22) 48%,
        rgba(255, 255, 255, 0.08) 80%,
        transparent 100%
    );
    z-index: 10;
    pointer-events: none;
    box-shadow: inset 1px 0 0 rgba(255, 255, 255, 0.15);
}

/* Brillo especular diagonal (Laminado mate / brillo editorial) */
.luxury-cover-sheen {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        125deg,
        transparent 38%,
        rgba(255, 255, 255, 0.14) 46%,
        rgba(255, 255, 255, 0.28) 50%,
        rgba(255, 255, 255, 0.08) 54%,
        transparent 62%
    );
    transform: rotate(15deg);
    pointer-events: none;
    z-index: 11;
    opacity: 0.75;
}

/* Textura táctil de tela o piel de libro (Bookcloth Canvas) */
.luxury-cover-canvas-texture {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                      radial-gradient(rgba(0, 0, 0, 0.14) 1px, transparent 1px);
    background-size: 4px 4px;
    background-position: 0 0, 2px 2px;
    pointer-events: none;
    z-index: 2;
    opacity: 0.85;
}

/* Borde de foil de oro/plata con filete doble */
.luxury-cover-foil-border {
    position: relative;
    z-index: 5;
    width: 100%;
    height: 100%;
    border: 1px solid rgba(230, 200, 120, 0.55);
    outline: 1px dashed rgba(230, 200, 120, 0.25);
    outline-offset: -3px;
    border-radius: 2px 6px 6px 2px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-sizing: border-box;
    padding: 0.45rem 0.4rem;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.35);
}

.size-large .luxury-cover-foil-border {
    padding: 0.85rem 0.75rem;
    outline-offset: -5px;
    border-width: 1.5px;
}

.size-thumb .luxury-cover-foil-border {
    padding: 0.25rem 0.2rem;
    outline: none;
}

/* Encabezado de Serie y Volumen */
.luxury-cover-top-badge {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.52rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #f7d794;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}

.size-medium .luxury-cover-top-badge {
    font-size: 0.44rem;
    justify-content: center;
    letter-spacing: 0.1em;
}

.size-thumb .luxury-cover-top-badge {
    font-size: 0.38rem;
    letter-spacing: 0.05em;
    justify-content: center;
}

/* Emblema Vectorial Central */
.luxury-cover-center-art {
    margin: auto 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #e5b96f;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.45));
}

.luxury-cover-center-art svg {
    display: block;
    width: 68px;
    height: 68px;
}

.size-medium .luxury-cover-center-art svg {
    width: 36px;
    height: 36px;
}

.size-thumb .luxury-cover-center-art svg {
    width: 22px;
    height: 22px;
}

/* Tipografía de Portada */
.luxury-cover-typography {
    text-align: center;
    margin: auto 0;
}

.luxury-cover-title {
    font-family: 'Cinzel', 'Playfair Display', Georgia, serif;
    font-size: 0.98rem;
    font-weight: 700;
    line-height: 1.22;
    color: #ffffff;
    margin: 0;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.7);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.size-large .luxury-cover-title {
    font-size: 1.18rem;
    -webkit-line-clamp: 4;
}

.size-medium .luxury-cover-title {
    font-size: 0.62rem;
    line-height: 1.18;
    -webkit-line-clamp: 3;
}

.size-thumb .luxury-cover-title {
    font-size: 0.46rem;
    line-height: 1.15;
    -webkit-line-clamp: 2;
}

.luxury-cover-divider {
    font-size: 0.55rem;
    color: #f7d794;
    letter-spacing: 0.15em;
    margin: 0.35rem 0;
    opacity: 0.9;
}

.size-medium .luxury-cover-divider,
.size-thumb .luxury-cover-divider {
    display: none;
}

.luxury-cover-sub {
    font-size: 0.62rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    margin: 0;
    line-height: 1.25;
    letter-spacing: 0.03em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Sello de Edición Inferior */
.luxury-cover-bottom-seal {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.48rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    color: #f7d794;
    text-transform: uppercase;
    border-top: 1px solid rgba(230, 200, 120, 0.25);
    padding-top: 0.25rem;
    margin-top: 0.2rem;
}

.size-medium .luxury-cover-bottom-seal {
    font-size: 0.42rem;
    justify-content: center;
    gap: 0.35rem;
}

.size-thumb .luxury-cover-bottom-seal {
    display: none;
}

/* Cinta marcapáginas dorada (desactivada para dejar la portada limpia) */
.luxury-cover-gold-ribbon {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
    opacity: 0 !important;
    visibility: hidden !important;
}


/* Filo de hojas de papel en el lateral derecho */
.luxury-cover-pages-rim {
    position: absolute;
    top: 5px;
    right: -4px;
    bottom: 5px;
    width: 5px;
    background: repeating-linear-gradient(to bottom, #f5ede1, #eae0cf 2px, #fbf7ee 4px);
    border-radius: 0 3px 3px 0;
    box-shadow: inset 1px 0 2px rgba(0, 0, 0, 0.25);
    z-index: 1;
}

/* Interacción 3D en Hover para tarjetas del catálogo */
.manual-item-card:hover .luxury-cover-art {
    transform: rotateY(-8deg) rotateX(2deg) scale(1.04);
    box-shadow: -10px 16px 28px rgba(18, 12, 8, 0.32);
}

/* Miniaturas en Modal de Detalle */
.mini-thumb-wrap {
    flex-shrink: 0;
    border-radius: 4px;
    overflow: hidden;
    margin-right: 0.75rem;
}

.crossref-thumb-card {
    transition: transform 0.25s ease;
    cursor: pointer;
}

.crossref-thumb-card:hover {
    transform: translateY(-4px) scale(1.06);
}

/* ========================================================
   8. ARQUITECTURA RESPONSIVA MÓVIL DE ALTA GAMA (CAMPUS CDPE)
   Optimizada para Smartphones (<= 640px) y Tablets (<= 860px)
   ======================================================== */

@media (max-width: 680px) {
    /* Contenedor General de Secciones */
    .campus-container {
        padding-left: 0.85rem !important;
        padding-right: 0.85rem !important;
    }

    .escalon-section-header {
        margin-bottom: 1.5rem;
    }
    .escalon-section-header h2 {
        font-size: clamp(1.4rem, 4.5vw, 1.85rem);
    }
    .escalon-section-header p {
        font-size: 0.88rem;
        line-height: 1.45;
    }

    /* Grilla de Manuales: 1 Columna en Smartphone */
    .manuales-grid-layout, .franchise-grid-layout {
        grid-template-columns: 1fr !important;
        gap: 1.15rem !important;
    }

    /* Tarjeta de Manual en Móvil: Formato Modular 2 Filas */
    .manual-item-card {
        display: grid !important;
        grid-template-columns: 100px 1fr !important;
        grid-template-rows: auto auto !important;
        gap: 0.85rem !important;
        padding: 0.95rem !important;
        border-radius: 18px !important;
        background: #ffffff !important;
        border: 1px solid #ede7db !important;
        box-shadow: 0 4px 16px rgba(40, 30, 20, 0.05) !important;
    }

    .manual-card-book-preview {
        grid-column: 1 !important;
        grid-row: 1 !important;
        padding: 0 !important;
        background: transparent !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        width: 100px !important;
    }

    .manual-card-book-preview .shelf-book-pair-cover,
    .manual-card-book-preview .luxury-cover-art.size-medium,
    .manual-card-book-preview .mini-book-cover-3d {
        width: 100px !important;
        height: 148px !important;
        border-radius: 3px 8px 8px 3px !important;
        flex-shrink: 0 !important;
    }

    .manual-card-body {
        grid-column: 2 !important;
        grid-row: 1 !important;
        padding: 0 !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: space-between !important;
        min-width: 0 !important;
    }

    .manual-card-meta {
        display: flex !important;
        align-items: center !important;
        justify-content: space-between !important;
        gap: 0.35rem !important;
        margin-bottom: 0.25rem !important;
    }

    .meta-pillar-badge {
        font-size: 0.68rem !important;
        padding: 0.18rem 0.55rem !important;
        max-width: 155px !important;
        white-space: nowrap !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
    }

    .meta-pages-badge {
        font-size: 0.7rem !important;
        flex-shrink: 0 !important;
    }

    .manual-card-title {
        font-size: 0.98rem !important;
        font-weight: 700 !important;
        line-height: 1.25 !important;
        margin: 0.25rem 0 !important;
        color: #0a2240 !important;
        display: -webkit-box !important;
        -webkit-line-clamp: 2 !important;
        -webkit-box-orient: vertical !important;
        overflow: hidden !important;
    }

    .manual-card-sub {
        font-size: 0.8rem !important;
        line-height: 1.35 !important;
        color: var(--ink-subtle) !important;
        margin: 0 !important;
        display: -webkit-box !important;
        -webkit-line-clamp: 2 !important;
        -webkit-box-orient: vertical !important;
        overflow: hidden !important;
    }

    /* Barra de Botones Inferior que Abarca Todo el Ancho de la Tarjeta */
    .manual-card-actions {
        grid-column: 1 / -1 !important;
        grid-row: 2 !important;
        display: flex !important;
        align-items: center !important;
        gap: 0.5rem !important;
        width: 100% !important;
        padding-top: 0.75rem !important;
        border-top: 1px solid #f1ece4 !important;
        margin-top: 0.25rem !important;
    }

    .manual-card-actions .btn-card-action.primary {
        flex: 1 !important;
        justify-content: center !important;
        min-height: 42px !important;
        font-size: 0.84rem !important;
        padding: 0 1rem !important;
        border-radius: 999px !important;
    }

    .manual-card-actions .btn-card-action.secondary {
        min-height: 42px !important;
        font-size: 0.84rem !important;
        padding: 0 1rem !important;
        border-radius: 999px !important;
        justify-content: center !important;
    }

    .manual-card-actions .btn-card-action.ghost {
        min-height: 42px !important;
        width: 42px !important;
        justify-content: center !important;
        border-radius: 999px !important;
        flex-shrink: 0 !important;
    }
}

/* Adaptación del Lector Cuaderno / Flipbook en Móvil & Tablet */
@media (max-width: 860px) {
    .flipbook-modal-overlay {
        padding: 0 !important;
    }

    .strongme-notebook-canvas {
        width: 100vw !important;
        height: 100dvh !important;
        max-height: 100dvh !important;
        border-radius: 0 !important;
        border: none !important;
        margin: 0 !important;
    }

    .strongme-outer-calendar-tab {
        display: none !important;
    }

    .strongme-rings-spine {
        display: none !important;
    }

    .strongme-topbar {
        position: sticky !important;
        top: 0 !important;
        z-index: 50 !important;
        padding: 0.65rem 0.85rem !important;
        background: rgba(255, 255, 255, 0.95) !important;
        backdrop-filter: blur(10px) !important;
    }

    .strongme-brand-tag {
        font-size: 0.8rem !important;
    }

    .strongme-nav-controls {
        gap: 0.35rem !important;
    }

    .strongme-nav-controls .btn-notebook-ctrl {
        padding: 0.35rem 0.6rem !important;
        font-size: 0.75rem !important;
        border-radius: 999px !important;
    }

    .strongme-two-pages-spread {
        display: flex !important;
        flex-direction: column !important;
        grid-template-columns: none !important;
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch !important;
        padding: 0.85rem 0.85rem 3rem !important;
        gap: 1rem !important;
    }

    .strongme-left-page {
        padding: 1.25rem 1rem !important;
        border-radius: 16px !important;
        box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06) !important;
        flex-shrink: 0 !important;
    }

    .polaroid-frame-box {
        margin-bottom: 0.75rem !important;
        padding: 0.5rem !important;
    }

    .polaroid-cover-wrap {
        height: 130px !important;
    }

    .page-weather-header {
        margin-bottom: 0.75rem !important;
    }

    .learning-streak-card {
        padding: 0.5rem !important;
    }

    .strongme-right-page {
        padding: 1.25rem 1rem !important;
        border-radius: 16px !important;
        box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06) !important;
        flex-shrink: 0 !important;
    }

    .journal-quote-floating-card {
        padding: 0.85rem 1rem !important;
        border-radius: 14px !important;
    }

    .notebook-ruled-content {
        font-size: 0.95rem !important;
        line-height: 1.6 !important;
    }

    .notebook-action-footer {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 0.65rem !important;
        padding-top: 1rem !important;
    }

    .notebook-action-footer .btn-notebook-ctrl {
        width: 100% !important;
        min-height: 42px !important;
        justify-content: center !important;
    }
}

/* Ficha de Detalle Editorial Gestalten en Móvil */
@media (max-width: 992px) {
    .detail-modal-overlay {
        padding: 0.75rem !important;
    }

    .gestalten-detail-card {
        width: 100% !important;
        max-width: 620px !important;
        max-height: 92vh !important;
        border-radius: 20px !important;
        overflow-y: auto !important;
        -webkit-overflow-scrolling: touch !important;
        padding: 1.25rem 1rem !important;
    }

    .gestalten-header {
        margin-bottom: 1rem !important;
        padding-bottom: 0.75rem !important;
    }

    .gestalten-header .brand-title {
        font-size: 0.72rem !important;
    }

    .gestalten-body-grid {
        display: flex !important;
        flex-direction: column !important;
        grid-template-columns: none !important;
        gap: 1.5rem !important;
    }

    .gestalten-cover-col {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        justify-content: center !important;
    }

    .halo-circle-backdrop {
        width: 180px !important;
        height: 180px !important;
    }

    .gestalten-book-3d {
        transform: scale(0.9) !important;
    }

    .gestalten-content-col .gestalten-title {
        font-size: 1.35rem !important;
        line-height: 1.25 !important;
        text-align: center !important;
    }

    .gestalten-content-col .gestalten-byline {
        text-align: center !important;
        font-size: 0.78rem !important;
        margin-bottom: 0.75rem !important;
    }

    .gestalten-lead-quote {
        padding: 0.85rem 1rem !important;
        font-size: 0.88rem !important;
    }

    .crossref-thumbnails-stack {
        display: flex !important;
        flex-direction: row !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        gap: 0.75rem !important;
        padding: 0.5rem 0.25rem !important;
        scrollbar-width: none !important;
    }
}

/* ========================================================
   ESCALONES 0, 2, 3 Y 4 EN MÓVIL (<= 680px)
   ======================================================== */
@media (max-width: 680px) {
    /* Escalón 2: Hoja de Ruta SG Consulting */
    .roadmap-main-card {
        padding: 1rem 0.75rem !important;
        border-radius: 16px !important;
        border: 1px solid #ede7db !important;
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04) !important;
    }

    .specialty-pills-row {
        display: flex !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        gap: 0.5rem !important;
        padding: 0.25rem 0.1rem 0.65rem !important;
        margin-bottom: 1.25rem !important;
        scrollbar-width: none !important;
        justify-content: flex-start !important;
    }
    .specialty-pills-row::-webkit-scrollbar {
        display: none !important;
    }
    .specialty-pill-btn {
        flex-shrink: 0 !important;
        white-space: nowrap !important;
        font-size: 0.78rem !important;
        padding: 0.5rem 0.95rem !important;
        border-radius: 999px !important;
    }

    /* Tarjeta de Fase */
    .phase-card-item {
        padding: 1.15rem 0.85rem !important;
        border-radius: 16px !important;
        margin-bottom: 1.15rem !important;
        border-left-width: 5px !important;
        box-shadow: 0 4px 16px rgba(40, 30, 20, 0.05) !important;
    }

    .phase-card-header {
        margin-bottom: 0.75rem !important;
    }

    .phase-badge {
        font-size: 0.68rem !important;
        padding: 0.25rem 0.65rem !important;
        margin-bottom: 0.35rem !important;
    }

    .phase-card-header h3 {
        font-size: 1.18rem !important;
        line-height: 1.3 !important;
        color: #0a2240 !important;
    }

    .phase-goal {
        font-size: 0.85rem !important;
        line-height: 1.45 !important;
        margin-top: 0.4rem !important;
        color: #475569 !important;
    }

    /* Lista de Pasos Metodológicos */
    .phase-steps-list {
        background: #faf7f2 !important;
        border-radius: 12px !important;
        padding: 0.85rem 0.95rem !important;
        margin: 0.85rem 0 !important;
        font-size: 0.84rem !important;
        border: 1px solid #f1ece1 !important;
    }

    .phase-steps-list strong {
        font-size: 0.75rem !important;
        margin-bottom: 0.35rem !important;
    }

    .phase-steps-list ul {
        padding-left: 1.15rem !important;
        line-height: 1.55 !important;
    }

    .phase-steps-list li {
        margin-bottom: 0.3rem !important;
    }

    /* Título de la sección de Guías & Secretos */
    .guia-phase-section-title {
        font-size: 0.78rem !important;
        line-height: 1.35 !important;
        margin: 0 0 0.65rem !important;
    }

    /* Fila de Guía / Secreto Comercial: ARQUITECTURA RESPONSIVA 2 NIVELES */
    .guia-phase-row {
        display: grid !important;
        grid-template-columns: 62px 1fr !important;
        grid-template-rows: auto auto !important;
        gap: 0.75rem 0.85rem !important;
        padding: 0.85rem !important;
        border-radius: 14px !important;
        align-items: start !important;
        box-sizing: border-box !important;
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        margin-top: 0.65rem !important;
        background: #ffffff !important;
        border: 1px solid #ede7db !important;
    }

    .guia-phase-cover-col {
        grid-column: 1 !important;
        grid-row: 1 !important;
        display: flex !important;
        justify-content: center !important;
        align-items: flex-start !important;
    }

    .guia-phase-cover-col .luxury-cover-art.size-thumb {
        width: 60px !important;
        height: 88px !important;
        border-radius: 4px !important;
    }

    .guia-phase-info-col {
        grid-column: 2 !important;
        grid-row: 1 !important;
        min-width: 0 !important;
        padding-top: 0.1rem !important;
    }

    .guia-phase-title {
        font-size: 0.94rem !important;
        line-height: 1.3 !important;
        color: #0a2240 !important;
        margin-bottom: 0.25rem !important;
        word-break: break-word !important;
        display: block !important;
        font-weight: 700 !important;
    }

    .guia-phase-sub {
        font-size: 0.8rem !important;
        line-height: 1.4 !important;
        color: #64748b !important;
        margin: 0 !important;
    }

    /* Barra de botones inferior de 2 columnas al 100% del ancho */
    .guia-phase-actions-col {
        grid-column: 1 / -1 !important;
        grid-row: 2 !important;
        display: grid !important;
        grid-template-columns: 1fr 1fr !important;
        gap: 0.5rem !important;
        width: 100% !important;
        margin-top: 0.25rem !important;
    }

    .guia-phase-actions-col .btn-card-action {
        width: 100% !important;
        min-height: 42px !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        font-size: 0.82rem !important;
        font-weight: 700 !important;
        padding: 0.6rem 0.5rem !important;
        border-radius: 10px !important;
        box-sizing: border-box !important;
        white-space: nowrap !important;
    }

    /* Escalón 3: Laboratorios y Herramientas en móvil */
    .labs-category-block {
        margin-bottom: 2.15rem !important;
    }

    .labs-category-header {
        margin-bottom: 1rem !important;
        padding-bottom: 0.65rem !important;
    }

    .labs-category-header h3 {
        font-size: 1.22rem !important;
        line-height: 1.3 !important;
    }

    .labs-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
    }

    .lab-access-card {
        padding: 1.35rem 1.15rem !important;
        border-radius: 18px !important;
    }

    .lab-card-top-row {
        margin-bottom: 0.85rem !important;
    }

    .lab-icon-box {
        width: 48px !important;
        height: 48px !important;
        font-size: 1.25rem !important;
        border-radius: 14px !important;
    }

    .lab-access-card h3 {
        font-size: 1.15rem !important;
        margin-bottom: 0.35rem !important;
    }

    .lab-access-card p {
        font-size: 0.86rem !important;
        line-height: 1.48 !important;
        margin-bottom: 1.15rem !important;
    }

    .lab-access-card .btn {
        min-height: 44px !important;
        font-size: 0.85rem !important;
    }

    /* Escalón 4: Certificación en móvil */
    .cert-showcase-card {
        grid-template-columns: 1fr !important;
        padding: 1.35rem 1rem !important;
        gap: 1.5rem !important;
        text-align: center !important;
    }

    .cert-preview-box {
        margin: 0 auto !important;
    }
}