/* ============================================
   BIBLIOFLIX - ESTILOS PREMIUM NETFLIX
   ============================================ */

:root {
    --color-primary: #e50914;
    --color-primary-hover: #f40612;
    --color-primary-dark: #b20710;
    --color-bg: #0a0a0a;
    --color-bg-secondary: #141414;
    --color-bg-card: #1a1a1a;
    --color-bg-elevated: #232323;
    --color-text: #ffffff;
    --color-text-muted: #b3b3b3;
    --color-text-dim: #757575;
    --color-border: #2a2a2a;
    --color-success: #46d369;
    --color-warning: #ffc107;
    --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.5);
    --shadow-card-hover: 0 20px 40px rgba(0, 0, 0, 0.8);
    --shadow-glow: 0 0 20px rgba(229, 9, 20, 0.4);
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

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

body {
    font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    overflow-x: hidden;
    padding-top: 70px;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar-custom {
    background: linear-gradient(180deg, rgba(0,0,0,0.95) 0%, rgba(0,0,0,0.5) 100%);
    transition: var(--transition);
    padding: 15px 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.navbar-custom.navbar-scrolled {
    background: var(--color-bg);
    box-shadow: 0 2px 15px rgba(0,0,0,0.7);
}

.navbar-brand {
    font-weight: 900;
    font-size: 1.7rem;
    letter-spacing: -1px;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.brand-logo {
    color: var(--color-text);
}

.brand-flix {
    color: var(--color-primary);
}

.navbar-custom .nav-link {
    color: var(--color-text) !important;
    font-weight: 500;
    margin: 0 8px;
    transition: var(--transition);
    position: relative;
}

.navbar-custom .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
    transform: translateX(-50%);
}

.navbar-custom .nav-link:hover::after {
    width: 80%;
}

.navbar-custom .nav-link:hover {
    color: var(--color-primary) !important;
}

.navbar-toggler {
    border: 1px solid rgba(255,255,255,0.3);
}

.navbar-toggler-icon {
    filter: invert(1);
}

.search-container {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    z-index: 2;
    pointer-events: none;
}

.search-input {
    background: rgba(0,0,0,0.7);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 8px 15px 8px 35px;
    border-radius: 4px;
    width: 280px;
    transition: var(--transition);
}

.search-input:focus {
    background: rgba(0,0,0,0.9);
    border-color: var(--color-primary);
    color: var(--color-text);
    box-shadow: 0 0 0 3px rgba(229, 9, 20, 0.2);
    width: 320px;
    outline: none;
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

/* Badge favoritos en navbar */
.badge-favoritos {
    display: inline-block;
    background: var(--color-primary);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 10px;
    margin-left: 5px;
    min-width: 20px;
    text-align: center;
}

/* ============================================
   HERO BANNER
   ============================================ */
.hero-banner {
    position: relative;
    height: 60vh;
    min-height: 400px;
    display: flex;
    align-items: center;
    margin-top: -70px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: blur(8px) brightness(0.4);
    transform: scale(1.1);
    animation: zoomBg 30s ease-in-out infinite alternate;
}

@keyframes zoomBg {
    from { transform: scale(1.1); }
    to { transform: scale(1.2); }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to right,
        rgba(0,0,0,0.95) 0%,
        rgba(0,0,0,0.7) 50%,
        rgba(0,0,0,0.4) 100%
    ),
    linear-gradient(
        to top,
        var(--color-bg) 0%,
        transparent 60%
    );
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    padding-top: 90px;
    animation: fadeInLeft 1s ease;
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-badge {
    display: inline-block;
    background: var(--color-primary);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 4px 12px rgba(229, 9, 20, 0.4);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 15px;
    line-height: 1.1;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.8);
}

.hero-author {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: 20px;
}

.hero-author i {
    color: var(--color-primary);
    margin-right: 5px;
}

.hero-description {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 30px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-hero-primary,
.btn-hero-secondary {
    padding: 12px 30px;
    font-weight: 600;
    border-radius: 4px;
    transition: var(--transition);
    text-decoration: none;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-hero-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(229, 9, 20, 0.3);
}

.btn-hero-primary:hover {
    background: var(--color-primary-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(229, 9, 20, 0.5);
}

.btn-hero-secondary {
    background: rgba(109, 109, 110, 0.7);
    color: white;
    backdrop-filter: blur(5px);
}

.btn-hero-secondary:hover {
    background: rgba(109, 109, 110, 0.9);
    color: white;
    transform: translateY(-2px);
}

/* ============================================
   CATALOG SECTION
   ============================================ */
.catalog-section {
    padding: 40px 0;
    background: var(--color-bg);
    position: relative;
}

.section-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 25px;
    color: var(--color-text);
    padding-left: 12px;
    border-left: 4px solid var(--color-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    color: var(--color-primary);
}

/* ============================================
   LIBRO CARDS
   ============================================ */
.libro-card {
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    background: var(--color-bg-card);
    height: 100%;
    will-change: transform;
}

.libro-card:hover {
    transform: scale(1.05) translateY(-5px);
    z-index: 10;
    box-shadow: var(--shadow-card-hover);
}

.libro-card-inner {
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.libro-portada {
    position: relative;
    aspect-ratio: 2/3;
    overflow: hidden;
    background: #000;
}

.libro-portada img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
    display: block;
}

.libro-card:hover .libro-portada img {
    transform: scale(1.1);
    filter: brightness(0.8);
}

.libro-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top,
        rgba(0,0,0,0.95) 0%,
        rgba(0,0,0,0.7) 50%,
        rgba(0,0,0,0.3) 100%);
    opacity: 0;
    transition: var(--transition);
    display: flex;
    align-items: flex-end;
    padding: 15px;
}

.libro-card:hover .libro-overlay {
    opacity: 1;
}

.libro-overlay-content {
    width: 100%;
    transform: translateY(20px);
    transition: var(--transition);
}

.libro-card:hover .libro-overlay-content {
    transform: translateY(0);
}

.libro-titulo-overlay {
    color: white;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 5px;
    line-height: 1.3;
}

.libro-autor-overlay {
    color: var(--color-text-muted);
    font-size: 0.8rem;
    margin-bottom: 8px;
}

.libro-desc-overlay {
    color: rgba(255,255,255,0.8);
    font-size: 0.75rem;
    margin-bottom: 12px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.libro-acciones {
    display: flex;
    gap: 8px;
}

.btn-action-play, .btn-action-info {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid white;
    transition: var(--transition);
    color: white;
    text-decoration: none;
    font-size: 1rem;
}

.btn-action-play {
    background: white;
    color: black;
}

.btn-action-play:hover {
    background: rgba(255,255,255,0.85);
    color: black;
    transform: scale(1.1);
}

.btn-action-info {
    background: rgba(109, 109, 110, 0.7);
    border-color: rgba(255,255,255,0.5);
}

.btn-action-info:hover {
    background: rgba(109, 109, 110, 0.95);
    color: white;
    transform: scale(1.1);
}

.libro-info {
    padding: 12px;
    flex: 1;
}

.libro-titulo {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.3;
}

.libro-autor {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-bottom: 0;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================
   BOTÓN FAVORITO
   ============================================ */
.btn-favorito {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 5;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(0,0,0,0.7);
    border: 2px solid rgba(255,255,255,0.3);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    backdrop-filter: blur(5px);
}

.btn-favorito:hover {
    background: rgba(0,0,0,0.9);
    border-color: var(--color-primary);
    transform: scale(1.15);
}

.btn-favorito.activo {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
    box-shadow: 0 0 15px rgba(229, 9, 20, 0.6);
}

.btn-favorito.pulse-favorito {
    animation: pulseFav 0.6s ease;
}

@keyframes pulseFav {
    0% { transform: scale(1); }
    50% { transform: scale(1.4); }
    100% { transform: scale(1.15); }
}

/* ============================================
   LIBRO DETALLE (libro.php)
   ============================================ */
.libro-hero {
    position: relative;
    min-height: 70vh;
    padding: 80px 0 60px;
    margin-top: -70px;
    display: flex;
    align-items: center;
}

.libro-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: blur(20px) brightness(0.3);
    transform: scale(1.1);
}

.libro-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg,
        rgba(0,0,0,0.9) 0%,
        rgba(0,0,0,0.7) 50%,
        var(--color-bg) 100%);
}

.libro-hero-content {
    position: relative;
    z-index: 2;
    padding-top: 60px;
}

.btn-volver {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text);
    background: rgba(0,0,0,0.5);
    padding: 8px 16px;
    border-radius: 4px;
    margin-bottom: 30px;
    transition: var(--transition);
    text-decoration: none;
    backdrop-filter: blur(5px);
}

.btn-volver:hover {
    background: rgba(0,0,0,0.8);
    color: var(--color-primary);
    transform: translateX(-3px);
}

.libro-portada-grande {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(0,0,0,0.7);
    aspect-ratio: 2/3;
    transition: var(--transition);
}

.libro-portada-grande:hover {
    transform: scale(1.02);
}

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

.libro-info-detalle {
    padding-left: 20px;
}

.libro-categoria-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(229, 9, 20, 0.2);
    color: var(--color-primary);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
    border: 1px solid rgba(229, 9, 20, 0.4);
}

.libro-titulo-detalle {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 15px;
    line-height: 1.1;
    text-shadow: 2px 2px 8px rgba(0,0,0,0.8);
}

.libro-autor-detalle {
    font-size: 1.2rem;
    color: var(--color-text);
    margin-bottom: 10px;
    font-weight: 500;
}

.libro-autor-detalle i {
    color: var(--color-primary);
    margin-right: 8px;
}

.libro-fecha {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 25px;
}

.libro-fecha i {
    color: var(--color-primary);
    margin-right: 6px;
}

.libro-descripcion-detalle {
    font-size: 1.05rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.85);
    margin-bottom: 30px;
}

.libro-acciones-detalle {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn-leer-online,
.btn-descargar,
.btn-descargar-cubierta,
.btn-favorito-detalle,
.btn-compartir {
    padding: 12px 24px;
    font-weight: 600;
    border-radius: 4px;
    transition: var(--transition);
    text-decoration: none;
    border: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.btn-leer-online {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 15px rgba(229, 9, 20, 0.3);
}

.btn-leer-online:hover {
    background: var(--color-primary-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(229, 9, 20, 0.5);
}

.btn-descargar {
    background: var(--color-success);
    color: white;
}

.btn-descargar:hover {
    background: #3aaf57;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(70, 211, 105, 0.4);
}

.btn-descargar-cubierta {
    background: #6f42c1;
    color: white;
}

.btn-descargar-cubierta:hover {
    background: #5a32a3;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(111, 66, 193, 0.4);
}

.btn-favorito-detalle,
.btn-compartir {
    background: rgba(109, 109, 110, 0.7);
    color: white;
    backdrop-filter: blur(5px);
}

.btn-favorito-detalle:hover,
.btn-compartir:hover {
    background: rgba(109, 109, 110, 0.95);
    color: white;
    transform: translateY(-2px);
}

.btn-favorito-detalle.activo {
    background: var(--color-primary);
    box-shadow: 0 0 15px rgba(229, 9, 20, 0.5);
}

/* ============================================
   VISOR PDF
   ============================================ */
.visor-pdf-section {
    background: var(--color-bg-secondary);
    padding: 30px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    animation: slideDown 0.4s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.visor-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.visor-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin: 0;
    color: var(--color-text);
}

.visor-header h3 i {
    color: var(--color-primary);
    margin-right: 8px;
}

.visor-controles {
    display: flex;
    gap: 8px;
}

.btn-visor {
    background: rgba(255,255,255,0.1);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    padding: 8px 14px;
    transition: var(--transition);
}

.btn-visor:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.btn-cerrar-visor:hover {
    background: var(--color-primary);
}

.visor-pdf-container {
    width: 100%;
    height: 80vh;
    min-height: 600px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    background: #525659;
}

.visor-pdf-container iframe {
    width: 100%;
    height: 100%;
    border: none;
    background: white;
}

/* Fullscreen */
.visor-pdf-container:fullscreen,
.visor-pdf-container:-webkit-full-screen {
    width: 100vw;
    height: 100vh;
    border-radius: 0;
}

/* ============================================
   LIBROS RELACIONADOS
   ============================================ */
.relacionados-section {
    padding: 40px 0 60px;
    background: var(--color-bg);
}

/* ============================================
   ADMIN PANEL
   ============================================ */
.admin-section {
    padding: 30px 0 60px;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border);
}

.admin-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
}

.admin-header h1 i {
    color: var(--color-primary);
    margin-right: 10px;
}

.admin-header p {
    color: var(--color-text-muted);
    margin: 5px 0 0;
}

/* Stat cards */
.stat-card {
    background: var(--color-bg-card);
    border-radius: 12px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card);
    border-color: var(--color-primary);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}

.stat-info h3 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    color: var(--color-text);
}

.stat-info p {
    color: var(--color-text-muted);
    margin: 0;
    font-size: 0.9rem;
}

/* Admin cards */
.admin-card {
    background: var(--color-bg-card);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.admin-card-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-elevated);
}

.admin-card-header h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0;
}

.admin-card-header h3 i {
    color: var(--color-primary);
    margin-right: 8px;
}

.admin-card-body {
    padding: 25px;
}

.admin-card-body.p-0 {
    padding: 0;
}

/* Forms dark */
.form-dark {
    background: var(--color-bg-elevated) !important;
    border: 1px solid var(--color-border) !important;
    color: var(--color-text) !important;
    transition: var(--transition);
}

.form-dark:focus {
    background: var(--color-bg-elevated) !important;
    border-color: var(--color-primary) !important;
    color: var(--color-text) !important;
    box-shadow: 0 0 0 3px rgba(229, 9, 20, 0.2) !important;
}

.form-dark::placeholder {
    color: var(--color-text-dim);
}

.form-label {
    color: var(--color-text);
    font-weight: 500;
    margin-bottom: 8px;
}

.form-label i {
    color: var(--color-primary);
    margin-right: 5px;
}

.form-text {
    color: var(--color-text-dim) !important;
}

/* Tabla admin */
.admin-table {
    background: var(--color-bg-card) !important;
    color: var(--color-text);
    margin-bottom: 0;
}

.admin-table thead {
    background: var(--color-bg-elevated);
}

.admin-table thead th {
    border-bottom: 2px solid var(--color-primary);
    color: var(--color-text);
    font-weight: 600;
    padding: 15px;
    background: var(--color-bg-elevated);
}

.admin-table tbody tr {
    background: var(--color-bg-card) !important;
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.admin-table tbody tr:hover {
    background: var(--color-bg-elevated) !important;
}

.admin-table tbody td {
    padding: 12px 15px;
    vertical-align: middle;
    border-color: var(--color-border);
    color: var(--color-text);
}

.admin-thumb {
    width: 50px;
    height: 70px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

/* Login */
.login-section {
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    padding: 40px 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(229, 9, 20, 0.1), transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(229, 9, 20, 0.05), transparent 50%),
        var(--color-bg);
}

.login-card {
    background: var(--color-bg-card);
    border-radius: 12px;
    padding: 40px;
    border: 1px solid var(--color-border);
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header i {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: 15px;
    display: block;
}

.login-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.login-header p {
    color: var(--color-text-muted);
    margin: 0;
    font-size: 0.95rem;
}

.login-info {
    text-align: center;
    padding: 12px;
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid rgba(255, 193, 7, 0.3);
    border-radius: 6px;
}

.login-info small {
    color: var(--color-warning);
}

.login-info i {
    margin-right: 5px;
}

/* ============================================
   FAVORITOS
   ============================================ */
.favoritos-section {
    padding: 40px 0 60px;
    min-height: calc(100vh - 200px);
}

.favoritos-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px 0;
}

.favoritos-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 10px;
}

.favoritos-title i {
    color: var(--color-primary);
    margin-right: 15px;
    animation: heartBeat 1.5s ease-in-out infinite;
}

@keyframes heartBeat {
    0%, 100% { transform: scale(1); }
    25%, 75% { transform: scale(1.15); }
    50% { transform: scale(1.05); }
}

.favoritos-subtitle {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    margin: 0;
}

.favoritos-acciones {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    padding: 15px 20px;
    background: var(--color-bg-card);
    border-radius: 10px;
    border: 1px solid var(--color-border);
}

.badge-cantidad {
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 500;
}

.badge-cantidad i {
    color: var(--color-primary);
    margin-right: 8px;
}

.badge-cantidad span {
    color: var(--color-primary);
    font-weight: 700;
    font-size: 1.1rem;
}

/* ============================================
   EMPTY STATE
   ============================================ */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--color-text);
}

.empty-state i {
    font-size: 5rem;
    color: var(--color-primary);
    margin-bottom: 20px;
    display: block;
    opacity: 0.7;
}

.empty-state h3 {
    color: var(--color-text);
    margin-bottom: 10px;
    font-size: 1.5rem;
}

.empty-state p {
    color: var(--color-text-muted);
    margin-bottom: 25px;
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    border-radius: 8px;
    border: none;
    padding: 14px 20px;
}

.alert-danger {
    background: rgba(220, 53, 69, 0.15);
    color: #ff6b7a;
    border: 1px solid rgba(220, 53, 69, 0.3);
}

.alert-success {
    background: rgba(70, 211, 105, 0.15);
    color: #46d369;
    border: 1px solid rgba(70, 211, 105, 0.3);
}

.alert-warning {
    background: rgba(255, 193, 7, 0.15);
    color: #ffc107;
    border: 1px solid rgba(255, 193, 7, 0.3);
}

.alert i {
    margin-right: 6px;
}

/* ============================================
   MODAL OSCURO (edición)
   ============================================ */
.modal-dark {
    background: var(--color-bg-card);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.modal-dark .modal-header {
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
}

.modal-dark .modal-title {
    color: var(--color-text);
    font-weight: 600;
}

.modal-dark .modal-title i {
    color: var(--color-primary);
    margin-right: 8px;
}

.modal-dark .modal-body {
    background: var(--color-bg-card);
}

.modal-dark hr {
    border-color: var(--color-border);
    opacity: 1;
}

.modal-dark .archivo-actual {
    padding: 10px;
    background: var(--color-bg-elevated);
    border-radius: 6px;
    border: 1px solid var(--color-border);
}

.modal-dark .form-check-input {
    background-color: var(--color-bg-elevated);
    border-color: var(--color-border);
}

.modal-dark .form-check-input:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.modal-backdrop.show {
    opacity: 0.85;
}

/* ============================================
   FOOTER
   ============================================ */
.footer-custom {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: 50px 0 30px;
    margin-top: 60px;
}

.footer-title {
    font-weight: 800;
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.footer-subtitle {
    color: var(--color-text);
    font-weight: 600;
    margin-bottom: 15px;
    font-size: 1rem;
}

.footer-text {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 8px;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--color-primary);
    padding-left: 5px;
}

/* ============================================
   ANIMACIONES
   ============================================ */
.fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   TOASTS
   ============================================ */
.toast {
    background: var(--color-bg-card);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: 8px;
}

.toast-header {
    background: var(--color-bg-elevated);
    color: var(--color-text);
    border-bottom: 1px solid var(--color-border);
}

.toast .btn-close {
    filter: invert(1);
}

.toast.text-bg-success {
    background: rgba(70, 211, 105, 0.95) !important;
    color: white !important;
}

.toast.text-bg-success .toast-header {
    background: rgba(70, 211, 105, 0.4);
    color: white;
}

.toast.text-bg-danger {
    background: rgba(220, 53, 69, 0.95) !important;
    color: white !important;
}

.toast.text-bg-warning {
    background: rgba(255, 193, 7, 0.95) !important;
    color: #000 !important;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 991px) {
    .search-input {
        width: 100%;
        margin-top: 10px;
    }
    .search-input:focus {
        width: 100%;
    }
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-description {
        font-size: 1rem;
    }
    .libro-titulo-detalle {
        font-size: 2rem;
    }
    .libro-info-detalle {
        padding-left: 0;
        margin-top: 30px;
    }
}

@media (max-width: 767px) {
    body {
        padding-top: 60px;
    }
    .hero-banner {
        height: auto;
        min-height: 0;
        padding: 100px 0 40px;
    }
    .hero-title {
        font-size: 1.9rem;
    }
    .hero-content {
        max-width: 100%;
        text-align: center;
    }
    .hero-description {
        font-size: 0.95rem;
    }
    .libro-titulo-detalle {
        font-size: 1.7rem;
    }
    .favoritos-title {
        font-size: 1.8rem;
    }
    .admin-header {
        flex-direction: column;
        align-items: flex-start;
    }
    .admin-header h1 {
        font-size: 1.5rem;
    }
    .visor-pdf-container {
        height: 60vh;
    }
}

@media (max-width: 576px) {
    /* HERO MOBILE: layout compacto sin alturas fijas */
    .hero-banner {
        height: auto;
        min-height: 0;
        padding: 90px 0 30px;
        margin-top: -60px;
    }
    .hero-bg {
        animation: none;
        filter: blur(6px) brightness(0.35);
    }
    .hero-content {
        padding-top: 0;
        text-align: center;
    }
    .hero-badge {
        font-size: 0.7rem;
        padding: 4px 12px;
        margin-bottom: 12px;
    }
    .hero-title {
        font-size: 1.5rem;
        margin-bottom: 8px;
        line-height: 1.2;
    }
    .hero-author {
        font-size: 0.85rem;
        margin-bottom: 14px;
    }
    /* Ocultar la descripción en mobile (es muy larga y empuja el contenido) */
    .hero-description {
        display: none;
    }
    .hero-buttons {
        flex-direction: column;
        gap: 10px;
    }
    .btn-hero-primary, .btn-hero-secondary {
        width: 100%;
        text-align: center;
        justify-content: center;
        padding: 10px 20px;
        font-size: 0.95rem;
    }
    .section-title {
        font-size: 1.2rem;
    }
    .libro-titulo-detalle {
        font-size: 1.4rem;
    }
    .libro-acciones-detalle {
        flex-direction: column;
    }
    .libro-acciones-detalle .btn {
        width: 100%;
        justify-content: center;
    }
    .login-card {
        padding: 25px;
    }
    .stat-card {
        flex-direction: column;
        text-align: center;
    }
    .visor-header {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: 5px;
}

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

/* Selection */
::selection {
    background: var(--color-primary);
    color: white;
}