/* /var/www/html/libreria/assets/css/style.css */
/* Diseño moderno y profesional para biblioteca digital */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Crimson+Text:ital,wght@0,400;0,600;1,400&display=swap');

:root {
    /* Paleta moderna de biblioteca */
    --primary: #8B4513;            /* Marrón chocolate */
    --secondary: #A0522D;          /* Marrón siena */
    --accent: #D2691E;             /* Marrón claro */
    --gold: #CD853F;               /* Marrón dorado */
    --warm-gold: #DEB887;          /* Beige cálido */
    --cream: #FFF8DC;              /* Crema marfil */
    --light-gray: #F5F5DC;         /* Beige claro */
    --text-dark: #2F1B14;          /* Texto marrón oscuro */
    --text-light: #8B7355;         /* Texto marrón medio */
    --success: #48bb78;            /* Verde éxito */
    --warning: #ed8936;            /* Naranja advertencia */
    --danger: #f56565;             /* Rojo peligro */
    --info: #4299e1;               /* Azul información */
    
    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, #D2B48C 0%, #CD853F 100%);
    --gradient-accent: linear-gradient(135deg, #DEB887 0%, #D2B48C 100%);
    --gradient-gold: linear-gradient(135deg, #CD853F 0%, #DEB887 100%);
    --gradient-light: linear-gradient(135deg, #FFFFFF 0%, #FFF8DC 100%);
    
    /* Sombras modernas */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 25px 50px rgba(0, 0, 0, 0.15);
    
    /* Tipografías */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Crimson Text', Georgia, serif;
    
    /* Espaciado */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Radius */
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}

/* Reset y base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-sans) !important;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-dark) !important;
    background: var(--cream) !important;
    letter-spacing: -0.01em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Navegación moderna */
.navbar-library {
    background: rgba(139, 69, 19, 0.95) !important;
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-md);
    padding: var(--space-md) 0 !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.navbar-library.scrolled {
    background: rgba(139, 69, 19, 0.98) !important;
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.navbar-library .navbar-brand {
    font-family: var(--font-serif) !important;
    font-weight: 600 !important;
    font-size: 1.75rem !important;
    color: white !important;
    text-decoration: none !important;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.navbar-library .navbar-brand:hover {
    color: var(--gold) !important;
    transform: translateY(-1px);
}

.navbar-library .navbar-brand i {
    font-size: 1.5rem;
    color: var(--gold) !important;
    filter: drop-shadow(0 2px 4px rgba(139, 69, 19, 0.3));
}

.navbar-library .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500 !important;
    margin: 0 var(--space-xs);
    padding: var(--space-sm) var(--space-md) !important;
    border-radius: var(--radius) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    text-decoration: none !important;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.navbar-library .navbar-nav .nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-gold);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.navbar-library .navbar-nav .nav-link:hover,
.navbar-library .navbar-nav .nav-link.active {
    color: white !important;
    background: rgba(139, 69, 19, 0.1) !important;
    transform: translateY(-1px);
}

.navbar-library .navbar-nav .nav-link:hover::before,
.navbar-library .navbar-nav .nav-link.active::before {
    width: 80%;
}

/* Búsqueda en navbar */
.navbar-search {
    background: rgba(139, 69, 19, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    border-radius: var(--radius-lg) !important;
    color: white !important;
    font-weight: 400;
    padding: var(--space-sm) var(--space-md) !important;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.navbar-search:focus {
    background: rgba(139, 69, 19, 0.15) !important;
    border-color: var(--gold) !important;
    box-shadow: 0 0 0 3px rgba(238, 202, 87, 0.2) !important;
    color: white !important;
}

.navbar-search::placeholder {
    color: rgba(255, 255, 255, 0.7) !important;
}

.btn-library-search {
    background: var(--gradient-gold) !important;
    border: none !important;
    color: var(--primary) !important;
    border-radius: var(--radius-lg) !important;
    font-weight: 600;
    padding: var(--space-sm) var(--space-md) !important;
    transition: all 0.3s ease;
    margin-left: var(--space-xs);
}

.btn-library-search:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    color: var(--primary) !important;
}

/* Títulos modernos */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif) !important;
    font-weight: 600 !important;
    color: var(--primary) !important;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
    font-family: var(--font-serif) !important;
    font-weight: 700 !important;
    color: var(--primary) !important;
}

/* Cards modernas */
.card {
    background: white !important;
    border: none !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-sm) !important;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.card:hover {
    box-shadow: var(--shadow-lg) !important;
    transform: translateY(-4px);
}

.card-header {
    background: linear-gradient(135deg, #D2B48C 0%, #CD853F 100%) !important;
    border-bottom: none !important;
    color: white !important;
    font-weight: 600 !important;
    font-family: var(--font-serif) !important;
    padding: var(--space-lg) var(--space-xl) !important;
    position: relative;
}
/* Headers de estadísticas - fondo claro, texto oscuro */
.stats-card .card-header,
.card-header.stats-header {
    background: #f8f9fa !important;
    color: #333 !important;
}

.stats-card .card-header h5,
.stats-card .card-header h6,
.card-header.stats-header h5,
.card-header.stats-header h6 {
    color: #333 !important;
}

/* Headers de filtros - fondo claro, texto oscuro */
.filter-card .card-header,
.card-header.filter-header {
    background: #f8f9fa !important;
    color: #333 !important;
}

.filter-card .card-header h5,
.filter-card .card-header h6,
.card-header.filter-header h5,
.card-header.filter-header h6 {
    color: #333 !important;
}

/* Headers en páginas específicas */
.page-stats .card-header,
.page-books .card-header,
.page-home .card-header {
    background: #f8f9fa !important;
    color: #333 !important;
}

.page-stats .card-header h5,
.page-stats .card-header h6,
.page-books .card-header h5,
.page-books .card-header h6,
.page-home .card-header h5,
.page-home .card-header h6 {
    color: #333 !important;
}

/* Headers generales - texto visible */
.card-header h1,
.card-header h2,
.card-header h3,
.card-header h4,
.card-header h5,
.card-header h6 {
    color: inherit !important;
}

/* Específicamente para stats.php */
.estadisticas-page .card-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%) !important;
    color: #495057 !important;
    border-bottom: 2px solid #dee2e6 !important;
}

.estadisticas-page .card-header h5,
.estadisticas-page .card-header h6,
.estadisticas-page .card-header i {
    color: #495057 !important;
}

/* Para cards de información en view_book */
.book-detail .card-header {
    background: #f8f9fa !important;
    color: #333 !important;
}

.book-detail .card-header::before {
    display: none !important;
}

/* Pestañas en view_book */
.nav-tabs .nav-link {
    color: #333 !important;
    background: transparent !important;
}

.nav-tabs .nav-link.active {
    color: #0d6efd !important;
    background: #fff !important;
}
.card-header::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-gold);
}

/* Hero section moderna */
.library-hero {
    background: var(--gradient-primary) !important;
    border-radius: var(--radius-xl) !important;
    color: white !important;
    position: relative;
    overflow: hidden;
    margin-bottom: var(--space-2xl);
    box-shadow: var(--shadow-xl) !important;
}

.library-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(205, 133, 63, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(222, 184, 135, 0.2) 0%, transparent 50%),
        url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="books" width="20" height="20" patternUnits="userSpaceOnUse"><rect width="20" height="20" fill="none"/><path d="M5,5 L8,5 L8,15 L5,15 Z M10,3 L13,3 L13,17 L10,17 Z M15,7 L18,7 L18,13 L15,13 Z" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23books)"/></svg>');
    background-blend-mode: overlay;
}

.library-hero .hero-content {
    position: relative;
    z-index: 2;
    padding: var(--space-2xl) var(--space-xl);
    text-align: center;
}

.library-hero .hero-title {
    font-size: 3.5rem !important;
    font-weight: 700 !important;
    margin-bottom: var(--space-lg) !important;
    background: linear-gradient(135deg, white 0%, var(--gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.library-hero .hero-subtitle {
    font-size: 1.25rem !important;
    color: rgba(255, 255, 255, 0.9) !important;
    margin-bottom: var(--space-xl) !important;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* Botones modernos */
.btn {
    border-radius: var(--radius-md) !important;
    font-weight: 600 !important;
    padding: var(--space-sm) var(--space-lg) !important;
    border: none !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: var(--font-sans) !important;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    text-decoration: none !important;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-library-primary {
    background: var(--gradient-gold) !important;
    color: var(--primary) !important;
    box-shadow: var(--shadow-sm);
    font-size: 1.1rem !important;
    padding: var(--space-md) var(--space-xl) !important;
}

.btn-library-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: var(--primary) !important;
}

.btn-library-outline {
    background: rgba(255, 255, 255, 0.1) !important;
    border: 2px solid rgba(255, 255, 255, 0.3) !important;
    color: white !important;
    backdrop-filter: blur(10px);
    font-size: 1.1rem !important;
    padding: var(--space-md) var(--space-xl) !important;
}

.btn-library-outline:hover {
    background: rgba(255, 255, 255, 0.2) !important;
    border-color: var(--gold) !important;
    color: white !important;
    transform: translateY(-2px);
}

.btn-primary {
    background: var(--gradient-primary) !important;
    color: white !important;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    color: white !important;
}

.btn-success {
    background: linear-gradient(135deg, var(--success) 0%, #38a169 100%) !important;
    color: white !important;
}

.btn-outline-primary {
    color: var(--primary) !important;
    border: 2px solid var(--primary) !important;
    background: transparent !important;
}

.btn-outline-primary:hover {
    background: var(--primary) !important;
    color: white !important;
}

/* Estadísticas modernas */
.library-stats-card {
    background: white !important;
    border: none !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-sm) !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.library-stats-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-gold);
}

.library-stats-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg) !important;
}

.library-stats-card .stats-icon-container {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: var(--gradient-primary) !important;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-md);
    box-shadow: var(--shadow-md);
}

.library-stats-card .stats-icon-container i {
    color: white !important;
    font-size: 1.5rem;
}

.library-stats-card .stats-number {
    color: var(--primary) !important;
    font-family: var(--font-serif) !important;
    font-size: 2.5rem !important;
    font-weight: 700 !important;
    margin-bottom: var(--space-xs);
}

.library-stats-card .stats-label {
    color: var(--text-light) !important;
    font-weight: 500 !important;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Cards de libros modernas */
.libro-card, .home-book-card {
    background: white !important;
    border: none !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: var(--shadow-sm) !important;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.libro-card:hover, .home-book-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl) !important;
}

.libro-card .card-img-top, .home-book-card .card-img-top {
    transition: transform 0.4s ease;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.libro-card:hover .card-img-top, .home-book-card:hover .card-img-top {
    transform: scale(1.05);
}

/* Botón flotante de edición */
.libro-card .position-absolute, .home-book-card .position-absolute {
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 10;
}

.libro-card:hover .position-absolute, .home-book-card:hover .position-absolute {
    opacity: 1;
}

.libro-card .position-absolute .btn, .home-book-card .position-absolute .btn {
    background: var(--gradient-primary) !important;
    color: white !important;
    border: none !important;
    width: 40px;
    height: 40px;
    border-radius: 50% !important;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.libro-card .position-absolute .btn:hover, .home-book-card .position-absolute .btn:hover {
    background: var(--gradient-gold) !important;
    color: var(--primary) !important;
    transform: scale(1.1);
}

/* Formularios modernos */
.form-control {
    border: 2px solid var(--light-gray) !important;
    border-radius: var(--radius-md) !important;
    padding: var(--space-sm) var(--space-md) !important;
    font-weight: 400 !important;
    color: var(--text-dark) !important;
    background: white !important;
    transition: all 0.3s ease;
    font-family: var(--font-sans) !important;
}

.form-control:focus {
    border-color: var(--gold) !important;
    box-shadow: 0 0 0 3px rgba(238, 202, 87, 0.1) !important;
    background: white !important;
}

.form-select {
    border: 2px solid var(--light-gray) !important;
    border-radius: var(--radius-md) !important;
    padding: var(--space-sm) var(--space-md) !important;
    font-weight: 400 !important;
    color: var(--text-dark) !important;
    background: white !important;
}

.form-select:focus {
    border-color: var(--gold) !important;
    box-shadow: 0 0 0 3px rgba(238, 202, 87, 0.1) !important;
}

.form-label {
    font-weight: 600 !important;
    color: var(--primary) !important;
    font-family: var(--font-sans) !important;
    margin-bottom: var(--space-sm);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Badges modernos */
.badge {
    font-size: 0.75rem !important;
    padding: var(--space-xs) var(--space-sm) !important;
    border-radius: var(--radius) !important;
    font-weight: 600 !important;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge.bg-success { 
    background: var(--success) !important; 
}

.badge.bg-warning { 
    background: var(--warning) !important; 
    color: white !important;
}

.badge.bg-secondary { 
    background: var(--text-light) !important; 
}

/* Alertas modernas */
.alert {
    border: none !important;
    border-radius: var(--radius-md) !important;
    border-left: 4px solid !important;
    background: white !important;
    box-shadow: var(--shadow-sm) !important;
    font-weight: 500;
    padding: var(--space-md) var(--space-lg) !important;
}

.alert-success {
    border-left-color: var(--success) !important;
    color: #2f855a !important;
}

.alert-danger {
    border-left-color: var(--danger) !important;
    color: #c53030 !important;
}

/* Footer moderno */
footer {
    background: var(--gradient-primary) !important;
    color: white !important;
    border-top: none;
    margin-top: var(--space-2xl);
    padding: var(--space-xl) 0 !important;
}

/* Animaciones y efectos */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease-out;
}

/* Scroll personalizado */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-gold);
    border-radius: var(--radius);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gold);
}

/* Utilidades específicas */
.text-gold {
    color: var(--gold) !important;
}

.bg-gradient-primary {
    background: var(--gradient-primary) !important;
}

.bg-gradient-gold {
    background: var(--gradient-gold) !important;
}

/* Estados responsive */
@media (max-width: 768px) {
    .library-hero .hero-title {
        font-size: 2.5rem !important;
    }
    
    .library-hero .hero-subtitle {
        font-size: 1.1rem !important;
    }
    
    .library-hero .hero-content {
        padding: var(--space-xl) var(--space-md);
    }
    
    .libro-card:hover, .home-book-card:hover {
        transform: translateY(-4px) scale(1.01);
    }
    
    .navbar-library .navbar-brand {
        font-size: 1.5rem !important;
    }
}

@media (max-width: 576px) {
    .library-stats-card .stats-number {
        font-size: 2rem !important;
    }
    
    .btn-library-primary, .btn-library-outline {
        padding: var(--space-sm) var(--space-md) !important;
        font-size: 1rem !important;
    }
}

/* Añadir al final de /var/www/html/libreria/assets/css/style.css */

/* Mejoras para las tarjetas de libros */
.libro-card {
    transition: all 0.3s ease;
    border: none;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.libro-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.libro-card:hover .card-img-top {
    transform: scale(1.05);
}

/* Contenedor de imagen responsivo */
.card-img-container {
    background: linear-gradient(45deg, #f8f9fa 25%, transparent 25%), 
                linear-gradient(-45deg, #f8f9fa 25%, transparent 25%), 
                linear-gradient(45deg, transparent 75%, #f8f9fa 75%), 
                linear-gradient(-45deg, transparent 75%, #f8f9fa 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

/* Asegurar que las tarjetas tengan altura uniforme en cada fila */
@media (min-width: 1400px) {
    .col-xl-2 .libro-card {
        height: 100%;
        min-height: 450px;
    }
}

@media (min-width: 992px) and (max-width: 1399px) {
    .col-lg-3 .libro-card {
        height: 100%;
        min-height: 420px;
    }
}

@media (min-width: 768px) and (max-width: 991px) {
    .col-md-4 .libro-card {
        height: 100%;
        min-height: 400px;
    }
}

@media (min-width: 576px) and (max-width: 767px) {
    .col-sm-6 .libro-card {
        height: 100%;
        min-height: 380px;
    }
}

/* Titulo del libro más prominente */
.libro-card .card-title {
    color: var(--dark-color);
    line-height: 1.2;
    font-weight: 600;
}

/* Autor con mejor tipografía */
.libro-card .card-text strong {
    color: var(--secondary-color);
    font-weight: 500;
}

/* Estrellas más compactas en las tarjetas */
.libro-card .star-rating i {
    font-size: 0.9rem;
    margin-right: 1px;
}

/* Badges de estado más atractivos */
.libro-card .badge {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Botón de ver detalles mejorado */
.libro-card .btn-outline-primary {
    border-width: 1.5px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.libro-card .btn-outline-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0,123,255,0.3);
}

/* Mejoras para pantallas pequeñas */
@media (max-width: 576px) {
    .libro-card {
        margin-bottom: 1.5rem;
    }
    
    .card-img-container {
        height: 240px !important;
    }
    
    .libro-card .card-title {
        font-size: 0.9rem;
        min-height: 2rem;
    }
}

/* Indicador de favorito mejorado */
.libro-card .fa-heart {
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
    animation: heartbeat 2s ease-in-out infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* Hover effect suave para las imágenes */
.card-img-top {
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Loading placeholder para imágenes */
.card-img-top[data-src] {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Mejorar la legibilidad en modo oscuro */
@media (prefers-color-scheme: dark) {
    .dark-mode .libro-card {
        background-color: var(--card-bg);
        border: 1px solid #404040;
    }
    
    .dark-mode .libro-card .card-title {
        color: var(--text-color);
    }
    
    .dark-mode .libro-card .card-text strong {
        color: #b0b0b0;
    }
}

/* Tarjetas de libros clickeables */
.libro-card {
    transition: all 0.3s ease;
    cursor: pointer !important;
}

.libro-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 35px rgba(0,0,0,0.2) !important;
}

.libro-card:hover .card-img-top {
    transform: scale(1.05);
}

/* Título más prominente */
.libro-card .card-title {
    color: var(--dark-color) !important;
    font-weight: 700 !important;
}

/* Excepción para el header de filtros */
.filter-header {
    background: #f8f9fa !important;
    color: #333 !important;
}

.filter-header h5 {
    color: #333 !important;
}
/* Corregir pestañas en vista de libro */
.card-header-tabs {
    background: transparent !important;
    border-bottom: 1px solid #ddd;
    margin-bottom: 0;
}

.card-header-tabs .nav-link {
    background: transparent !important;
    color: #333 !important;
    border: 1px solid transparent;
    border-radius: 0.375rem 0.375rem 0 0;
}

.card-header-tabs .nav-link:hover {
    color: #0d6efd !important;
    background: #f8f9fa !important;
}

.card-header-tabs .nav-link.active {
    color: #0d6efd !important;
    background: #fff !important;
    border-color: #ddd #ddd #fff !important;
    border-bottom: 1px solid #fff;
}

/* Corregir el fondo negro en view_book */
.book-detail .card-header {
    background: #f8f9fa !important;
    color: #333 !important;
}

.book-detail .card-header::before {
    display: none !important;
}

/* Tabla sin bordes en información del libro */
.table-borderless td {
    border: none !important;
    padding: 0.75rem 0.5rem;
}

.table-borderless td:first-child {
    width: 25%;
    color: #666;
    font-weight: 600;
}

.comprado-ribbon {
    position: absolute;
    top: 8px;
    left: -8px;
    background: linear-gradient(45deg, #28a745, #20c997);
    color: white;
    padding: 6px 16px;
    font-size: 0.65rem;
    font-weight: bold;
    border-radius: 0 8px 8px 0;
    z-index: 15;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    letter-spacing: 0.5px;
    transform: rotate(-12deg);
    transform-origin: left center;
    white-space: nowrap;
}

.comprado-ribbon::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 6px 0 0 6px;
    border-color: transparent transparent transparent #1e7e34;
}

/* Búsqueda en tiempo real - Posicionamiento absoluto corregido */
.search-suggestions {
    position: fixed;
    background: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
    z-index: 9999;
    max-height: 300px;
    overflow-y: auto;
    display: none;
    min-width: 300px;
}

.search-suggestion {
    padding: 12px 15px;
    border-bottom: 1px solid #f0f0f0;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.search-suggestion:hover {
    background-color: #f8f9fa;
}

.search-suggestion:last-child {
    border-bottom: none;
}

/* Asegurar que el contenedor de búsqueda tenga posición relativa */
.navbar-nav .input-group {
    position: relative;
}

/* Mejorar visualización de imágenes en tarjetas */
.libro-card .card-img-container {
    background: linear-gradient(45deg, #f8f9fa 25%, transparent 25%), 
                linear-gradient(-45deg, #f8f9fa 25%, transparent 25%), 
                linear-gradient(45deg, transparent 75%, #f8f9fa 75%), 
                linear-gradient(-45deg, transparent 75%, #f8f9fa 75%);
    background-size: 10px 10px;
    background-position: 0 0, 0 5px, 5px -5px, -5px 0px;
}

.libro-card .card-img-top {
    border-radius: 0 !important;
    transition: transform 0.3s ease !important;
}

.libro-card:hover .card-img-top {
    transform: scale(1.05) !important;
}

/* Centrar mejor las imágenes que no tienen portada */
.libro-card .card-img-container .bg-light {
    border-radius: 0;
}