/* ==========================================================================
   css/sections/escritos.css
   Sección Escritos & Archivo Documental | Andrés Bestard Maggio
   Integración con Flipbook Engine (flipbook.lautarobestard.com.ar)
   ========================================================================== */

/* ── Section Shell & Tabs ── */
.escritos-tabs {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 1.25rem;
}

.escritos-tab-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    padding: 0.65rem 1.75rem;
    border-radius: 30px;
    font-family: var(--font-sans, 'Poppins', sans-serif);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    cursor: pointer;
    transition: all 0.22s var(--ease-out-editorial, ease);
}

.escritos-tab-btn:hover {
    color: var(--text-primary);
    background: rgba(0, 0, 0, 0.04);
}

body.dark-theme .escritos-tab-btn:hover {
    background: rgba(255, 255, 255, 0.05);
}

.escritos-tab-btn.active {
    color: #ffffff;
    background: #a67c52;
    border-color: #a67c52;
    box-shadow: 0 4px 16px rgba(166, 124, 82, 0.35);
}

body.dark-theme .escritos-tab-btn.active {
    background: #a67c52;
    color: #ffffff;
    border-color: #a67c52;
    box-shadow: 0 4px 20px rgba(166, 124, 82, 0.45);
}

/* Tab Content Visibility */
.escritos-tab-content {
    display: none;
}

.escritos-tab-content.active {
    display: block;
    animation: fadeInEscritosTab 0.45s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInEscritosTab {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ── 1. Hero Showcase: Monumental Work (Búsqueda del Lenguaje Perdido) ── */
.escritos-hero-showcase {
    position: relative;
    background: linear-gradient(135deg, rgba(28, 29, 31, 0.03), rgba(166, 124, 82, 0.08));
    border: 1px solid rgba(166, 124, 82, 0.28);
    border-radius: 20px;
    padding: clamp(2rem, 4vw, 3.5rem);
    margin-bottom: 4.5rem;
    overflow: hidden;
    box-shadow: var(--shadow-premium);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

body.dark-theme .escritos-hero-showcase {
    background: linear-gradient(135deg, rgba(22, 22, 26, 0.95), rgba(30, 26, 22, 0.95));
    border-color: rgba(166, 124, 82, 0.4);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 1px rgba(166, 124, 82, 0.3);
}

.ehs-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: clamp(2rem, 4vw, 3.5rem);
    align-items: center;
}

/* 3D Book Presentation */
.ehs-book-wrapper {
    perspective: 1200px;
    display: flex;
    justify-content: center;
}

.ehs-book-3d {
    position: relative;
    width: 220px;
    height: 310px;
    border-radius: 8px 12px 12px 8px;
    cursor: pointer;
    transform-style: preserve-3d;
    transform: rotateY(-18deg) rotateX(4deg);
    transition: transform 0.45s cubic-bezier(0.23, 1, 0.32, 1), box-shadow 0.45s ease;
    box-shadow: -12px 18px 35px rgba(0, 0, 0, 0.4), -2px 0 6px rgba(0, 0, 0, 0.2);
}

.ehs-book-3d:hover {
    transform: rotateY(-4deg) rotateX(0deg) scale(1.04);
    box-shadow: -18px 24px 45px rgba(0, 0, 0, 0.5), 0 0 25px rgba(166, 124, 82, 0.3);
}

.ehs-book-cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px 12px 12px 8px;
    display: block;
}

/* Hardcover Spine & Edge Effects */
.ehs-book-3d::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 18px;
    height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.5) 0%, rgba(255,255,255,0.15) 40%, rgba(0,0,0,0.3) 100%);
    border-radius: 8px 0 0 8px;
    pointer-events: none;
}

.ehs-book-3d::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.18) 0%, transparent 60%);
    border-radius: 8px 12px 12px 8px;
    pointer-events: none;
}

.ehs-3d-badge {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(14, 14, 16, 0.85);
    color: #ca8a04;
    border: 1px solid rgba(202, 138, 4, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    font-family: var(--font-sans, sans-serif);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    padding: 3px 8px;
    border-radius: 20px;
    text-transform: uppercase;
}

/* Hero Content */
.ehs-content {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.ehs-badge-row {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.ehs-badge-monumental {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(166, 124, 82, 0.15);
    border: 1px solid rgba(166, 124, 82, 0.4);
    color: #a67c52;
    padding: 4px 12px;
    border-radius: 20px;
    font-family: var(--font-sans, sans-serif);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

body.dark-theme .ehs-badge-monumental {
    background: rgba(166, 124, 82, 0.22);
    color: #e5b887;
    border-color: rgba(166, 124, 82, 0.5);
}

.ehs-title {
    font-family: var(--font-display, 'Bebas Neue', sans-serif);
    font-size: clamp(2rem, 3.8vw, 3.2rem);
    letter-spacing: 0.03em;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.08;
}

.ehs-subtitle {
    font-family: var(--font-sans, 'Poppins', sans-serif);
    font-size: 0.92rem;
    font-weight: 600;
    color: #a67c52;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin: 0;
}

.ehs-lead {
    font-family: var(--font-serif, 'EB Garamond', serif);
    font-size: 1.15rem;
    line-height: 1.75;
    color: var(--text-primary);
    margin: 0.25rem 0 0.75rem 0;
}

.ehs-quote-callout {
    border-left: 3px solid #a67c52;
    padding-left: 1.25rem;
    margin: 0.5rem 0 1.25rem 0;
}

.ehs-quote-callout p {
    font-family: var(--font-serif, 'EB Garamond', serif);
    font-size: 1.05rem;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0.25rem;
}

.ehs-quote-callout cite {
    font-family: var(--font-sans, sans-serif);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-style: normal;
    display: block;
}

/* Hero CTA Row */
.ehs-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.btn-hero-flipbook {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: #a67c52;
    color: #ffffff !important;
    padding: 12px 26px;
    border-radius: 30px;
    font-family: var(--font-sans, sans-serif);
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(166, 124, 82, 0.35);
    transition: all 0.25s cubic-bezier(0.23, 1, 0.32, 1);
    border: none;
}

.btn-hero-flipbook:hover {
    background: #8e653f;
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(166, 124, 82, 0.45);
}

.btn-hero-index {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
    padding: 11px 22px;
    border-radius: 30px;
    font-family: var(--font-sans, sans-serif);
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-hero-index:hover {
    border-color: #a67c52;
    color: #a67c52;
    background: rgba(166, 124, 82, 0.06);
    transform: translateY(-2px);
}

/* ── 2. Curated Publications Categories ── */
.escritos-group {
    margin-bottom: 4.5rem;
}

.escritos-group-header {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 1rem;
}

.escritos-group-title {
    font-family: var(--font-display, 'Bebas Neue', sans-serif);
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    letter-spacing: 0.04em;
    color: var(--text-primary);
    margin: 0 0 0.25rem 0;
    text-transform: uppercase;
}

.escritos-group-sub {
    font-family: var(--font-serif, 'EB Garamond', serif);
    font-size: 1.02rem;
    color: var(--text-secondary);
    margin: 0;
}

/* 3D Book Grid */
.escritos-books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.75rem;
}

.book-card-3d {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 1.5rem;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-premium);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.book-card-3d::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: #a67c52;
    opacity: 0;
    transition: opacity 0.25s ease;
}

.book-card-3d:hover {
    border-color: rgba(166, 124, 82, 0.45);
    transform: translateY(-5px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.12), 0 0 20px rgba(166, 124, 82, 0.15);
}

body.dark-theme .book-card-3d:hover {
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.5), 0 0 25px rgba(166, 124, 82, 0.2);
}

.book-card-3d:hover::before {
    opacity: 1;
}

/* Book Cover Frame inside Card */
.bc3d-cover-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 16/11;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1.25rem;
    border: 1px solid var(--border-glass);
    background: rgba(0, 0, 0, 0.04);
}

.bc3d-cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.book-card-3d:hover .bc3d-cover-img {
    transform: scale(1.05);
}

.bc3d-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    background: rgba(14, 14, 16, 0.85);
    color: #ca8a04;
    border: 1px solid rgba(202, 138, 4, 0.35);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    font-family: var(--font-sans, sans-serif);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    padding: 3px 8px;
    border-radius: 20px;
    text-transform: uppercase;
}

.bc3d-meta {
    font-family: var(--font-sans, sans-serif);
    font-size: 0.72rem;
    font-weight: 600;
    color: #a67c52;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.35rem;
}

.bc3d-title {
    font-family: var(--font-sans, 'Poppins', sans-serif);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.5rem 0;
    line-height: 1.35;
}

.bc3d-desc {
    font-family: var(--font-serif, 'EB Garamond', serif);
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0 0 1.25rem 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Card Actions */
.bc3d-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px dashed var(--border-glass);
    padding-top: 1rem;
    margin-top: auto;
}

.bc3d-read-btn {
    font-family: var(--font-sans, sans-serif);
    font-size: 0.78rem;
    font-weight: 700;
    color: #a67c52;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color 0.2s ease, transform 0.2s ease;
}

.book-card-3d:hover .bc3d-read-btn {
    color: var(--text-primary);
    transform: translateX(3px);
}

.bc3d-pdf-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: var(--font-sans, sans-serif);
    font-size: 0.72rem;
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: 6px;
    border: 1px solid var(--border-glass);
    text-decoration: none;
    transition: all 0.2s ease;
}

.bc3d-pdf-link:hover {
    color: var(--text-primary);
    border-color: #a67c52;
    background: rgba(166, 124, 82, 0.08);
}

/* ── 3. Volume Index: 12 Tomos de Búsqueda del Lenguaje Perdido ── */
.escritos-chapters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.25rem;
}

.chapter-jump-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 12px;
    padding: 1.15rem;
    text-decoration: none;
    transition: all 0.25s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.chapter-jump-card:hover {
    border-color: #a67c52;
    background: rgba(166, 124, 82, 0.06);
    transform: translateY(-3px) translateX(2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.cjc-cover {
    position: relative;
    width: 62px;
    height: 86px;
    flex-shrink: 0;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--border-glass);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.cjc-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.chapter-jump-card:hover .cjc-cover img {
    transform: scale(1.08);
}

.cjc-num {
    position: absolute;
    bottom: 3px;
    right: 3px;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    color: #ffffff;
    font-family: var(--font-sans, sans-serif);
    font-size: 0.6rem;
    font-weight: 700;
    padding: 1px 4px;
    border-radius: 3px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.cjc-info {
    flex: 1;
    min-width: 0;
}

.cjc-header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 0.2rem;
}

.cjc-tomo {
    font-family: var(--font-sans, sans-serif);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #a67c52;
}

.cjc-page-badge {
    font-family: var(--font-sans, sans-serif);
    font-size: 0.65rem;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.05);
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid var(--border-glass);
}

body.dark-theme .cjc-page-badge {
    background: rgba(255, 255, 255, 0.05);
}

.cjc-title {
    font-family: var(--font-serif, 'EB Garamond', serif);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.35;
    margin: 0 0 0.35rem 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cjc-desc {
    font-family: var(--font-sans, sans-serif);
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.35;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ── 4. Galería Numen Digital Library Banner ── */
.btn-library-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: 14px;
    padding: 1.75rem 2rem;
    margin: 3.5rem 0 2.5rem 0;
    text-decoration: none;
    color: var(--text-primary);
    cursor: pointer;
    box-shadow: var(--shadow-subtle, 0 4px 20px rgba(0, 0, 0, 0.04));
    backdrop-filter: blur(var(--blur-glass));
    -webkit-backdrop-filter: blur(var(--blur-glass));
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.btn-library-banner:hover {
    border-color: var(--accent);
    background: var(--accent-glow);
    transform: translateY(-2px);
}

.blb-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-width: 75%;
}

.blb-seal {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent-warm);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.blb-title {
    font-family: var(--font-sans);
    font-size: clamp(1.2rem, 2vw, 1.45rem);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.01em;
}

.blb-desc {
    font-family: var(--font-serif);
    font-size: 1.02rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

.blb-action {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.6rem 1.25rem;
    background: var(--accent-glow);
    color: var(--text-primary);
    border: 1px solid var(--accent);
    border-radius: 6px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.82rem;
    letter-spacing: 0.03em;
    white-space: nowrap;
    transition: var(--transition-fast);
}

.btn-library-banner:hover .blb-action {
    background: var(--accent);
    color: var(--bg-main);
    transform: none;
}

/* ── 5. Reseñas Críticas (Critiques) ── */
.critiques-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 1rem 0 3rem 0;
}

.critiques-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
}

.critique-card {
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    background: var(--bg-card);
    padding: 2.5rem;
    box-shadow: var(--shadow-premium);
    backdrop-filter: blur(var(--blur-glass));
    -webkit-backdrop-filter: blur(var(--blur-glass));
    transition: var(--transition-smooth);
}

.critique-card:hover {
    border-color: #a67c52;
    transform: translateY(-2px);
}

.critique-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px dashed var(--border-glass);
    padding-bottom: 0.75rem;
    margin-bottom: 1.5rem;
}

.critique-author {
    font-family: var(--font-sans, sans-serif);
    font-size: 0.88rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-primary);
}

.critique-date {
    font-family: var(--font-serif, serif);
    font-size: 0.92rem;
    font-style: italic;
    color: var(--text-secondary);
}

.critique-title {
    font-family: var(--font-display, 'Bebas Neue', sans-serif);
    font-size: clamp(1.55rem, 2.8vw, 2.0rem);
    font-weight: 400;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #a67c52;
    margin-bottom: 1.5rem;
}

.critique-body-wrapper {
    position: relative;
    overflow: hidden;
}

.critique-body-text {
    font-family: var(--font-serif, 'EB Garamond', serif);
    font-size: 1.15rem;
    line-height: 1.85;
    color: var(--text-primary);
    transition: max-height 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.critique-body-text.text-collapsed {
    max-height: 160px;
    overflow: hidden;
    mask-image: linear-gradient(to bottom, black 55%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, black 55%, transparent 100%);
}

.critique-expand-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-family: var(--font-sans, sans-serif);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #a67c52;
    border-bottom: 1.5px solid transparent;
    padding: 0.25rem 0;
    margin-top: 1.5rem;
    display: inline-block;
    transition: var(--transition-fast);
}

.critique-expand-btn:hover {
    color: var(--text-primary);
    border-bottom-color: #a67c52;
}

.critique-expand-btn::after {
    content: ' ↓';
    font-size: 0.8rem;
    display: inline-block;
    transition: transform 0.2s ease;
}

.critique-expand-btn.expanded::after {
    transform: rotate(180deg);
}

/* ── 6. Flipbook Lightbox Modal & Floating Controls ── */
.flipbook-modal {
    position: fixed;
    inset: 0;
    z-index: 12000;
    background: rgba(4, 6, 12, 0.94);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.28s ease;
    padding: 16px;
}

.flipbook-modal.active {
    opacity: 1;
    pointer-events: auto;
}

.flipbook-modal-backdrop {
    position: absolute;
    inset: 0;
}

.flipbook-modal-container {
    position: relative;
    width: 100%;
    max-width: 1400px;
    height: 94vh;
    background: #020617;
    border-radius: 14px;
    border: 1px solid rgba(202, 138, 4, 0.35);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.9), 0 0 1px rgba(255, 255, 255, 0.15);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 2;
}

/* Floating Glassmorphism Controls over Viewer */
.flipbook-floating-controls {
    position: absolute;
    top: 14px;
    right: 14px;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(9, 13, 22, 0.78);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: 6px 10px;
    border-radius: 40px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(202, 138, 4, 0.15);
    transition: all 0.25s ease;
}

.flipbook-floating-controls:hover {
    background: rgba(9, 13, 22, 0.92);
    border-color: rgba(202, 138, 4, 0.4);
    box-shadow: 0 10px 36px rgba(0, 0, 0, 0.8), 0 0 12px rgba(202, 138, 4, 0.25);
}

.flipbook-floating-btn {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #cbd5e1;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    cursor: pointer;
    padding: 0;
    transition: all 0.2s ease;
}

.flipbook-floating-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
    transform: scale(1.08);
}

.flipbook-floating-btn.btn-close-flipbook:hover {
    background: #ca8a04;
    color: #020617;
    border-color: #ca8a04;
    transform: scale(1.08);
}

/* Fullscreen Mode Styles */
.flipbook-modal-container:fullscreen,
.flipbook-modal-container:-webkit-full-screen {
    max-width: 100vw !important;
    width: 100vw !important;
    height: 100vh !important;
    border-radius: 0 !important;
    border: none !important;
}

/* Accessible Golden Focus States */
.ehs-book-3d:focus-visible,
.btn-hero-flipbook:focus-visible,
.btn-hero-index:focus-visible,
.btn-library-banner:focus-visible,
.bc3d-cover-wrap:focus-visible,
.bc3d-read-btn:focus-visible,
.bc3d-pdf-link:focus-visible,
.chapter-jump-card:focus-visible,
.escritos-tab-btn:focus-visible,
.flipbook-floating-btn:focus-visible {
    outline: 2px solid #ca8a04 !important;
    outline-offset: 3px !important;
}

.flipbook-modal-body {
    position: relative;
    width: 100%;
    height: 100%;
    flex: 1;
    background: #020617;
}

.flipbook-modal-iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

.flipbook-modal-loader {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: #020617;
    gap: 16px;
    color: #94a3b8;
    font-size: 0.9rem;
    font-family: var(--font-sans, sans-serif);
    transition: opacity 0.25s ease;
    z-index: 5;
}

.flipbook-modal-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.flipbook-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(202, 138, 4, 0.2);
    border-top-color: #ca8a04;
    border-radius: 50%;
    animation: fbSpin 0.8s linear infinite;
}

@keyframes fbSpin {
    to { transform: rotate(360deg); }
}

/* ── Responsive Queries ── */
@media (max-width: 960px) {
    .ehs-layout {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .ehs-book-wrapper {
        margin-bottom: 1rem;
    }
    .ehs-book-3d {
        transform: rotateY(0deg) rotateX(0deg);
    }
    .ehs-badge-row {
        justify-content: center;
    }
    .ehs-quote-callout {
        border-left: none;
        border-top: 2px solid #a67c52;
        padding-left: 0;
        padding-top: 1rem;
    }
    .ehs-actions {
        justify-content: center;
    }
    .btn-library-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 1.25rem;
    }
    .blb-content {
        max-width: 100%;
    }
}

@media (max-width: 680px) {
    .escritos-books-grid {
        grid-template-columns: 1fr;
    }
    .escritos-chapters-grid {
        grid-template-columns: 1fr;
    }
    .escritos-tabs {
        flex-direction: column;
        align-items: stretch;
    }
    .escritos-tab-btn {
        text-align: center;
    }
    .critique-card {
        padding: 1.5rem;
    }
    .critique-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    .critique-date {
        font-size: 0.78rem;
    }
    .flipbook-modal {
        padding: 0;
    }
    .flipbook-modal-container {
        width: 100vw;
        height: 100vh;
        height: 100dvh;
        border-radius: 0;
        border: none;
    }
    .flipbook-floating-controls {
        top: 10px;
        right: 10px;
        padding: 4px 6px;
        gap: 6px;
    }
    .flipbook-floating-btn {
        width: 30px;
        height: 30px;
    }
}

@media (max-width: 480px) {
    .btn-hero-flipbook {
        width: 100%;
        justify-content: center;
    }
    .btn-hero-index {
        width: 100%;
        justify-content: center;
    }
}