/* ==========================================================================
   DESIGN SYSTEM PREMIUM — BIBLIOTECA DIGITAL INTERNACIONAL DE ALTO LUXO
   ========================================================================== */

:root {
    --bg-main: #07090e;
    --bg-surface: rgba(18, 24, 36, 0.85);
    --bg-card: rgba(24, 32, 48, 0.9);
    --bg-glass: rgba(18, 24, 36, 0.75);
    --border-color: rgba(212, 175, 55, 0.18);
    --border-hover: rgba(212, 175, 55, 0.6);
    
    --accent-gold: #d4af37;
    --accent-gold-light: #f3e5ab;
    --accent-gold-glow: rgba(212, 175, 55, 0.35);
    --accent-blue: #38bdf8;
    
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    
    --font-heading: 'Cormorant Garamond', Georgia, serif;
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --shadow-card: 0 16px 40px rgba(0, 0, 0, 0.6);
    --transition-smooth: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="light"] {
    --bg-main: #f8fafc;
    --bg-surface: rgba(255, 255, 255, 0.92);
    --bg-card: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.9);
    --border-color: rgba(212, 175, 55, 0.3);
    --border-hover: rgba(212, 175, 55, 0.8);
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-dim: #94a3b8;
    --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.08);
}

[hidden] {
    display: none !important;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Fundo Atmosférico de Biblioteca Clássica */
body.has-bg-atmosphere {
    background-image: 
        radial-gradient(circle at 50% 15%, rgba(212, 175, 55, 0.25) 0%, transparent 65%),
        linear-gradient(180deg, rgba(7, 9, 14, 0.45) 0%, rgba(7, 9, 14, 0.75) 60%, #07090e 100%),
        url('/images/bg-library.png');
    background-size: cover;
    background-position: center top;
    background-attachment: fixed;
}

/* --------------------------------------------------------------------------
   Header Navigation & Search
   -------------------------------------------------------------------------- */
.main-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 32px;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.brand-icon {
    font-size: 2.2rem;
    filter: drop-shadow(0 0 10px var(--accent-gold-glow));
}

.brand-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--accent-gold);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.8px;
    display: block;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 580px;
}

.search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0.6;
}

.search-box input {
    width: 100%;
    padding: 14px 44px 14px 48px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 4px var(--accent-gold-glow);
}

.clear-search-btn {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.4rem;
    cursor: pointer;
}

.theme-toggle-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    color: var(--text-main);
    font-size: 1.2rem;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.theme-toggle-btn:hover {
    border-color: var(--accent-gold);
    transform: scale(1.08);
}

/* Sidebar Toggle Button */
.sidebar-toggle-btn {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    color: var(--accent-gold);
    font-size: 1.3rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
    backdrop-filter: blur(10px);
    flex-shrink: 0;
}

.sidebar-toggle-btn:hover {
    border-color: var(--accent-gold);
    background: rgba(212, 175, 55, 0.18);
    box-shadow: 0 0 14px var(--accent-gold-glow);
    transform: scale(1.05);
}

.sidebar-toggle-btn:active {
    transform: scale(0.95);
}

/* --------------------------------------------------------------------------
   App Layout Grid & Sidebar Collapsed State
   -------------------------------------------------------------------------- */
.app-layout {
    max-width: 1400px;
    margin: 32px auto;
    padding: 0 32px;
    display: grid;
    grid-template-columns: 270px 1fr;
    gap: 36px;
    transition: grid-template-columns 0.35s cubic-bezier(0.16, 1, 0.3, 1), gap 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Estado Recolhido da Sidebar */
body.sidebar-collapsed .app-layout {
    grid-template-columns: 0px 1fr;
    gap: 0;
}

body.sidebar-collapsed .sidebar-filters {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateX(-30px);
    padding: 0;
    margin: 0;
    border: none;
    width: 0;
    overflow: hidden;
}

/* Sidebar Filters */
.sidebar-filters {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 26px;
    height: fit-content;
    box-shadow: var(--shadow-card);
    transition: var(--transition-smooth);
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
}

.filter-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--accent-gold);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.filter-group {
    margin-bottom: 24px;
}

.filter-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.custom-select {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    font-family: var(--font-sans);
    cursor: pointer;
}

.toggle-control-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-main);
    background: var(--bg-main);
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
}

.toggle-control-label:hover {
    border-color: var(--accent-gold);
}

.toggle-control-label input {
    cursor: pointer;
    width: 18px;
    height: 18px;
    accent-color: var(--accent-gold);
}

.stats-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
    margin-top: 24px;
    box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.4);
}

.stats-val {
    font-family: var(--font-heading);
    font-size: 2.6rem;
    font-weight: 700;
    color: var(--accent-gold);
    display: block;
    text-shadow: 0 0 15px var(--accent-gold-glow);
}

.stats-lbl {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.main-content {
    min-width: 0;
}

/* --------------------------------------------------------------------------
   Hero Showcase Banner Cards (Multi-Destaque Dinâmico)
   -------------------------------------------------------------------------- */
.hero-showcase-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.hero-showcase-card {
    position: relative;
    background: linear-gradient(135deg, rgba(24, 32, 48, 0.95) 0%, rgba(12, 17, 26, 0.95) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    display: grid;
    grid-template-columns: 1fr 115px;
    gap: 16px;
    align-items: center;
    overflow: hidden;
    box-shadow: var(--shadow-card), 0 0 30px rgba(212, 175, 55, 0.08);
    transition: var(--transition-smooth);
}

.hero-showcase-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-card), 0 0 35px var(--accent-gold-glow);
}

/* Regras de Destaques Dinâmicos por Estado da Sidebar:
   - Menu VISÍVEL (Desktop): Exibe 2 destaques (esconde o 3º)
   - Menu RECOLHIDO (Desktop): Exibe 3 destaques (exibe o 3º)
*/

/* Desktop: Menu Visível -> 2 Destaques */
body:not(.sidebar-collapsed) .hero-showcase-card:nth-child(n+3) {
    display: none !important;
}

/* Desktop: Menu Recolhido -> 3 Destaques */
body.sidebar-collapsed .hero-showcase-card:nth-child(3) {
    display: grid !important;
}

.hero-showcase-bg {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, var(--accent-gold-glow) 0%, transparent 70%);
    pointer-events: none;
    opacity: 0.4;
}

.hero-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(212, 175, 55, 0.15);
    border: 1px solid var(--accent-gold);
    border-radius: 20px;
    color: var(--accent-gold);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.25;
    color: var(--text-main);
    margin-bottom: 4px;
}

.hero-author {
    font-size: 0.85rem;
    color: var(--accent-gold);
    font-weight: 500;
    margin-bottom: 8px;
}

.hero-description {
    color: var(--text-muted);
    font-size: 0.8rem;
    line-height: 1.4;
    margin-bottom: 14px;
}

.hero-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.hero-showcase-cover {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 115px;
    margin: 0 auto;
}

.hero-cover-img {
    width: 100%;
    max-width: 115px;
    max-height: 165px;
    aspect-ratio: 2 / 3;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
}

.hero-cover-fallback {
    width: 100%;
    max-width: 115px;
    height: 165px;
}

/* --------------------------------------------------------------------------
   Category Carousel Section
   -------------------------------------------------------------------------- */
.category-carousel-section {
    margin-bottom: 32px;
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.carousel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.carousel-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    color: var(--accent-gold);
}

.carousel-nav-btns {
    display: flex;
    gap: 8px;
}

.carousel-nav-btn {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.carousel-nav-btn:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

.carousel-track-container {
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
}

.carousel-track-container::-webkit-scrollbar {
    display: none;
}

.carousel-track {
    display: flex;
    gap: 12px;
    padding-bottom: 4px;
}

.category-chip {
    flex: 0 0 auto;
    padding: 10px 18px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-smooth);
    white-space: nowrap;
}

.category-chip:hover {
    border-color: var(--accent-gold);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px var(--accent-gold-glow);
}

.category-chip.active {
    background: linear-gradient(135deg, var(--accent-gold), #b89628);
    color: #000;
    border-color: var(--accent-gold);
    font-weight: 700;
}

.chip-count {
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
}

.category-chip.active .chip-count {
    background: rgba(0, 0, 0, 0.15);
    color: #000;
}

/* Status Bar */
.status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
}

.section-heading {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    color: var(--text-main);
}

.results-count {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   3D Book Cards Grid
   -------------------------------------------------------------------------- */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 32px;
    margin-bottom: 40px;
}

.book-card {
    perspective: 1000px;
    cursor: pointer;
}

.book-cover-container {
    position: relative;
    width: 100%;
    aspect-ratio: 2 / 3;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-card);
    transition: var(--transition-smooth);
    transform-style: preserve-3d;
}

.book-card:hover .book-cover-container {
    transform: translateY(-10px) rotateY(-12deg) rotateX(4deg);
    border-color: var(--border-hover);
    box-shadow: -15px 24px 40px rgba(0, 0, 0, 0.7), 0 0 25px var(--accent-gold-glow);
}

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

/* Default Cover Fallback */
.book-cover-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 20px;
    background: linear-gradient(135deg, #1e293b, #0f172a);
    border-left: 6px solid var(--accent-gold);
}

.fallback-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    line-height: 1.3;
    color: #f8fafc;
}

.fallback-author {
    font-size: 0.8rem;
    color: var(--accent-gold);
}

/* Format Badges */
.badge-container {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.format-badge {
    padding: 4px 8px;
    background: rgba(15, 23, 42, 0.88);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent-blue);
    text-transform: uppercase;
}

.format-badge.epub {
    color: var(--accent-gold);
}

.book-info {
    margin-top: 14px;
}

.book-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-author {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Pagination */
.pagination-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    margin-top: 40px;
}

.pag-btn {
    padding: 12px 24px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    color: var(--text-main);
    font-family: var(--font-sans);
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.pag-btn:hover:not(:disabled) {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

.pag-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}
/* Toggle Switch (+18 Filter) */
.toggle-switch-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    padding: 10px 14px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
}

.toggle-switch-label:hover {
    border-color: var(--accent-gold);
}

.toggle-text-left {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-muted);
    user-select: none;
}

.toggle-switch {
    position: relative;
    width: 46px;
    height: 24px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: #334155;
    border-radius: 24px;
    transition: background 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: #94a3b8;
    border-radius: 50%;
    transition: transform 0.3s ease, background 0.3s ease;
}

.toggle-switch input:checked + .toggle-slider {
    background: linear-gradient(135deg, #ef4444, #b91c1c);
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.35);
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(22px);
    background: #fff;
}

/* Histórico de Obras Recentes no Menu Lateral */
.recent-books-section {
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.recent-books-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-gold);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.recent-books-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.recent-book-item {
    display: flex;
    flex-direction: column;
    padding: 8px 10px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.recent-book-item:hover {
    border-color: var(--accent-gold);
    transform: translateX(4px);
    background: rgba(212, 175, 55, 0.08);
}

.recent-book-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.recent-book-author {
    font-size: 0.72rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

/* Botão Meus Favoritos no Cabeçalho */
.favorites-filter-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-pill);
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    backdrop-filter: blur(10px);
    transition: var(--transition-smooth);
}

.favorites-filter-btn:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.2);
}

.favorites-filter-btn.active {
    background: rgba(212, 175, 55, 0.15);
    border-color: var(--accent-gold);
    color: var(--accent-gold);
    box-shadow: 0 0 20px rgba(212, 175, 55, 0.35);
}

.fav-count-badge {
    padding: 2px 7px;
    background: var(--accent-gold);
    color: #0f172a;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 700;
}

/* Ícone Estrela de Favoritos nos Cards dos Livros */
.favorite-star-btn {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 12;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.favorite-star-btn:hover {
    transform: scale(1.15);
    color: var(--accent-gold);
    border-color: var(--accent-gold);
}

.favorite-star-btn.active {
    color: #fbbf24;
    background: rgba(15, 23, 42, 0.9);
    border-color: #fbbf24;
    text-shadow: 0 0 8px rgba(251, 191, 36, 0.6);
    box-shadow: 0 0 12px rgba(251, 191, 36, 0.35);
}

/* Spinner */
.loading-container {
    text-align: center;
    padding: 60px 0;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-gold);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 16px;
}

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

/* Modal Window */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.78);
    backdrop-filter: blur(16px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 740px;
    position: relative;
    padding: 36px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.7);
}

.close-modal-btn {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-muted);
    cursor: pointer;
}

.modal-details-grid {
    display: grid;
    grid-template-columns: 210px 1fr;
    gap: 32px;
}

.modal-cover-img {
    width: 100%;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-card);
}

.modal-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--text-main);
    margin-bottom: 8px;
}

.modal-author {
    font-size: 1rem;
    color: var(--accent-gold);
    margin-bottom: 16px;
}

.modal-action-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.btn-read-epub {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--accent-gold), #b89628);
    border: none;
    border-radius: 30px;
    color: #000;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.btn-download {
    padding: 12px 24px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    color: var(--text-main);
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-smooth);
}

/* ePubJS Reader Layout */
.reader-body {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
}

.reader-header {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.back-link {
    color: var(--accent-gold);
    text-decoration: none;
    font-weight: 600;
}

.reader-book-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    display: inline-block;
    margin-left: 16px;
}

.reader-btn {
    padding: 6px 12px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-main);
    cursor: pointer;
    margin-left: 6px;
}

.reader-viewport {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
    max-width: 100vw;
}

.epub-viewer {
    width: 100%;
    max-width: 900px;
    height: 100%;
    margin: 0 auto;
    overflow-y: auto;
    overflow-x: hidden;
    perspective: 1400px;
}

.epub-viewer iframe {
    transition: transform 0.4s ease-in-out, opacity 0.3s ease-in-out;
}

/* Animações 3D de Passagem de Página */
.page-turning-next {
    animation: pageFlipNext 0.45s cubic-bezier(0.645, 0.045, 0.355, 1.000);
}

.page-turning-prev {
    animation: pageFlipPrev 0.45s cubic-bezier(0.645, 0.045, 0.355, 1.000);
}

@keyframes pageFlipNext {
    0% { transform: rotateY(0deg) scale(1); opacity: 1; transform-origin: left center; }
    50% { transform: rotateY(-35deg) scale(0.95); opacity: 0.6; transform-origin: left center; }
    100% { transform: rotateY(0deg) scale(1); opacity: 1; transform-origin: left center; }
}

@keyframes pageFlipPrev {
    0% { transform: rotateY(0deg) scale(1); opacity: 1; transform-origin: right center; }
    50% { transform: rotateY(35deg) scale(0.95); opacity: 0.6; transform-origin: right center; }
    100% { transform: rotateY(0deg) scale(1); opacity: 1; transform-origin: right center; }
}

.nav-arrow {
    background: rgba(0, 0, 0, 0.4);
    border: none;
    color: var(--text-main);
    font-size: 3rem;
    padding: 20px;
    cursor: pointer;
    z-index: 10;
}

.reader-footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: 10px 24px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.reader-progress-container {
    width: 100%;
    max-width: 500px;
    height: 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 10px;
    overflow: hidden;
}

.reader-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #d97706, #fbbf24);
    box-shadow: 0 0 10px rgba(251, 191, 36, 0.4);
    border-radius: 10px;
    transition: width 0.3s ease;
}

.reader-progress {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Google Translate Widget Styling */
.translate-box {
    display: inline-block;
    margin-right: 12px;
}

.goog-te-gadget-simple {
    background-color: var(--bg-main) !important;
    border: 1px solid var(--border-color) !important;
    padding: 4px 8px !important;
    border-radius: 6px !important;
    font-family: var(--font-sans) !important;
    font-size: 0.85rem !important;
}

.goog-te-gadget-simple .goog-te-menu-value span {
    color: var(--text-main) !important;
}

.goog-te-gadget-icon {
    display: none !important;
}

/* ==========================================================================
   RESPONSIVIDADE COMPLETA PARA TABLETS E SMARTPHONES
   ========================================================================== */

/* Tablets (< 992px) */
@media (max-width: 992px) {
    .app-layout {
        grid-template-columns: 1fr;
        padding: 0 20px;
        margin: 20px auto;
        gap: 20px;
    }

    body:not(.sidebar-collapsed) .app-layout {
        grid-template-columns: 1fr;
    }

    body.sidebar-collapsed .sidebar-filters {
        display: none;
    }

    .hero-showcase-card {
        grid-template-columns: 1fr;
        padding: 28px 24px;
        text-align: center;
        gap: 20px;
    }

    .hero-showcase-cover {
        order: -1;
        margin: 0 auto 12px auto;
        max-width: 160px;
    }

    .hero-cover-img {
        max-width: 160px;
        max-height: 220px;
    }

    .hero-title {
        font-size: 1.7rem;
    }

    .hero-description {
        margin: 0 auto 20px auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .modal-card {
        max-width: 92vw;
        padding: 24px;
    }

    .modal-details-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        text-align: center;
    }

    .modal-cover-img {
        max-width: 180px;
        margin: 0 auto;
    }

    .modal-action-btns {
        justify-content: center;
    }
}

/* Smartphones (< 640px) */
@media (max-width: 640px) {
    .main-header {
        padding: 12px 14px;
    }

    .header-container {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .brand {
        justify-content: flex-start;
        gap: 10px;
    }

    .brand-title {
        font-size: 1.4rem;
    }

    .brand-subtitle {
        font-size: 0.68rem;
    }

    .search-box {
        max-width: 100%;
    }

    .search-box input {
        font-size: 0.88rem;
        padding: 10px 36px 10px 40px;
    }

    .hero-showcase-container {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .hero-showcase-card {
        padding: 20px 16px;
    }

    .hero-showcase-card:nth-child(n+2),
    body.sidebar-collapsed .hero-showcase-card:nth-child(n+2) {
        display: none !important;
    }

    .hero-badge {
        font-size: 0.72rem;
        padding: 4px 10px;
    }

    .hero-title {
        font-size: 1.4rem;
    }

    .hero-showcase-cover {
        max-width: 130px;
    }

    .hero-cover-img {
        max-width: 130px;
        max-height: 180px;
    }

    .books-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

    .book-info {
        margin-top: 8px;
    }

    .book-title {
        font-size: 0.84rem;
        line-height: 1.3;
    }

    .book-author {
        font-size: 0.75rem;
    }

    .category-carousel-section {
        padding: 14px;
    }

    .carousel-title {
        font-size: 1.1rem;
    }

    .status-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        margin-bottom: 18px;
    }

    .section-heading {
        font-size: 1.4rem;
    }

    .reader-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 10px 16px;
    }

    .reader-header-right {
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .nav-arrow {
        font-size: 2rem;
        padding: 8px;
    }
}

/* Telas Muito Pequenas (< 380px) */
@media (max-width: 380px) {
    .books-grid {
        grid-template-columns: 1fr;
    }
}