/* ==========================================================================
           Variables y Tokens (UI/UX Mejorado)
           ========================================================================== */
        :root {
            --bg-base: #030303;
            --bg-surface: #0a0a0a;
            --bg-card: #121212;
            --bg-glass: rgba(10, 10, 10, 0.85);
            
            --text-primary: #ffffff;
            --text-secondary: #a3a3a3; /* Contraste mejorado para accesibilidad */
            --text-muted: #737373;
            
            --accent-gold: #d4af37;
            --accent-gold-dim: rgba(212, 175, 55, 0.15);
            --accent-gold-hover: #f0c954;
            
            --font-heading: 'Playfair Display', serif;
            --font-body: 'Inter', sans-serif;
            --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        
        body {
            background-color: var(--bg-base);
            color: var(--text-primary);
            font-family: var(--font-body);
            line-height: 1.7;
            overflow-x: hidden;
            /* Scrollbar personalizada */
            scrollbar-width: thin;
            scrollbar-color: var(--accent-gold) var(--bg-base);
        }
        
        body::-webkit-scrollbar { width: 8px; }
        body::-webkit-scrollbar-track { background: var(--bg-base); }
        body::-webkit-scrollbar-thumb { background: var(--accent-gold); border-radius: 4px; }
        ::selection { background: var(--accent-gold-dim); color: var(--accent-gold); }

        /* Tipografía */
        h1, h2, h3 { font-family: var(--font-heading); font-weight: 400; }
        a { text-decoration: none; color: inherit; }

        /* Preloader */
        #preloader {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background: var(--bg-base); z-index: 9999;
            display: flex; justify-content: center; align-items: center;
            transition: opacity 0.8s ease;
        }
        .loader-logo { font-family: var(--font-heading); font-size: 2rem; color: var(--accent-gold); letter-spacing: 5px; animation: pulse 1.5s infinite; }
        @keyframes pulse { 0% { opacity: 0.5; } 50% { opacity: 1; text-shadow: 0 0 20px var(--accent-gold); } 100% { opacity: 0.5; } }

        /* Navegación Glassmorphism */
        nav {
            position: fixed; top: 0; width: 100%;
            display: flex; justify-content: space-between; align-items: center;
            padding: 1.5rem 4rem;
            background: var(--bg-glass);
            backdrop-filter: blur(15px); -webkit-backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.03);
            z-index: 1000;
            transition: padding 0.3s ease;
        }
        nav.scrolled { padding: 1rem 4rem; }
        .logo { font-family: var(--font-heading); font-size: 1.5rem; letter-spacing: 3px; }
        .logo span { color: var(--accent-gold); }
        .nav-links { display: flex; gap: 3rem; list-style: none; }
        .nav-links a { font-size: 0.85rem; text-transform: uppercase; letter-spacing: 2px; color: var(--text-secondary); transition: var(--transition-smooth); }
        .nav-links a:hover { color: var(--accent-gold); }

        /* Hero Section - Parallax Effect */
        .hero {
            height: 100vh; position: relative; overflow: hidden;
            display: flex; align-items: center; justify-content: center;
        }
        .global-bg {
            position: fixed; top: 0; left: 0; width: 100vw; height: 125vh;
            background-image: linear-gradient(to bottom, rgba(3,3,3,0.3) 0%, rgba(3,3,3,0.85) 100%), url('../img/marian-isac-escritor-novela-negra-portada.jpeg');
            background-size: cover; background-position: center top;
            z-index: -1;
        }
        .hero-content {
            position: relative; z-index: 1; text-align: center; max-width: 900px; padding: 0 2rem;
            opacity: 0; transform: translateY(40px); transition: all 1s ease 0.5s;
        }
        .hero-content.visible { opacity: 1; transform: translateY(0); }
        
        .hero-tag {
            display: inline-block; padding: 0.5rem 1.2rem; border: 1px solid var(--accent-gold-dim);
            color: var(--accent-gold); font-size: 0.75rem; letter-spacing: 3px;
            text-transform: uppercase; margin-bottom: 2rem;
            background: rgba(212, 175, 55, 0.05); border-radius: 50px;
            backdrop-filter: blur(4px);
        }
        .hero-title { font-size: clamp(3rem, 6vw, 6rem); line-height: 1.1; margin-bottom: 1.5rem; letter-spacing: -1px; text-shadow: 0 10px 30px rgba(0,0,0,0.8); }
        .hero-subtitle { font-size: 1.25rem; color: var(--text-secondary); margin-bottom: 3rem; font-style: italic; max-width: 700px; margin-inline: auto; }

        /* Botones Premium */
        .btn-gold {
            display: inline-block; padding: 1.2rem 3.5rem;
            background: var(--accent-gold); color: var(--bg-base);
            font-size: 0.9rem; letter-spacing: 2px; text-transform: uppercase; font-weight: 600;
            transition: var(--transition-smooth); cursor: pointer; border: none;
        }
        .btn-gold:hover { background: var(--accent-gold-hover); box-shadow: 0 0 30px var(--accent-gold-dim); transform: translateY(-2px); }

        /* Social Proof Banner */
        .social-proof {
            background: rgba(10, 10, 10, 0.65); padding: 3rem 0; border-y: 1px solid rgba(255,255,255,0.02);
            text-align: center; display: flex; flex-direction: column; align-items: center; gap: 2rem;
            backdrop-filter: blur(10px);
        }
        .stars { color: var(--accent-gold); font-size: 1.5rem; letter-spacing: 5px; }
        .social-proof-text { font-size: 0.9rem; color: var(--text-secondary); letter-spacing: 1px; text-transform: uppercase; }
        .logos-row { display: flex; gap: 4rem; align-items: center; justify-content: center; opacity: 0.5; filter: grayscale(100%); }
        .logos-row span { font-family: var(--font-heading); font-size: 1.2rem; font-style: italic; }

        /* Sección Obras - "Los Expedientes" */
        .section-obras { padding: 8rem 4rem; background: linear-gradient(to bottom, rgba(3,3,3,0.7), rgba(3,3,3,0.95)); position: relative; }
        .section-header { text-align: center; margin-bottom: 5rem; }
        .section-header h2 { font-size: 3.5rem; margin-bottom: 1rem; }
        .divider { width: 60px; height: 1px; background: var(--accent-gold); margin: 0 auto; }

        .books-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 3rem; max-width: 1200px; margin: 0 auto; }
        
        .book-card {
            background: var(--bg-card); border: 1px solid rgba(255,255,255,0.03);
            padding: 4rem 2.5rem 3rem; text-align: center;
            transition: var(--transition-smooth); position: relative;
        }
        .book-card::before {
            content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 2px;
            background: var(--accent-gold); transform: scaleX(0); transition: var(--transition-smooth); transform-origin: left;
        }
        .book-card:hover { transform: translateY(-15px); background: #151515; box-shadow: 0 30px 60px rgba(0,0,0,0.6); }
        .book-card:hover::before { transform: scaleX(1); }
        
        .book-cover {
            width: 200px; height: 300px; object-fit: cover; margin: 0 auto 2.5rem auto;
            box-shadow: 0 20px 40px rgba(0,0,0,0.7); transition: var(--transition-smooth); display: block;
        }
        .book-card:hover .book-cover { transform: scale(1.05) translateY(-10px); }

        .book-title { font-size: 1.8rem; margin-bottom: 1rem; color: #fff; }
        .book-desc { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 2.5rem; }
        
        .card-actions { display: flex; flex-direction: column; gap: 1rem; }
        .btn-outline {
            padding: 1rem; border: 1px solid var(--accent-gold-dim); color: var(--accent-gold);
            text-transform: uppercase; letter-spacing: 1px; font-size: 0.8rem; transition: var(--transition-smooth);
            background: transparent; cursor: pointer;
        }
        .btn-outline:hover { background: var(--accent-gold-dim); }
        .btn-text { color: var(--text-muted); font-size: 0.8rem; text-decoration: underline; text-decoration-color: transparent; transition: var(--transition-smooth); background:none; border:none; cursor:pointer; }
        .btn-text:hover { color: var(--text-primary); text-decoration-color: var(--text-primary); }

        /* Sección Biografía */
        .section-bio { padding: 6rem 5%; background: rgba(3,3,3,0.7); backdrop-filter: blur(8px); border-bottom: 1px solid rgba(255,255,255,0.05); }
        .bio-container { max-width: 1000px; margin: 0 auto; display: flex; align-items: center; gap: 4rem; }
        .bio-image-wrapper { flex: 0 0 300px; }
        .bio-image { width: 100%; height: auto; border-radius: 5px; box-shadow: 0 10px 30px rgba(0,0,0,0.8); filter: grayscale(50%) contrast(1.1); transition: filter 0.5s ease; border: 1px solid rgba(212,175,55,0.1); }
        .bio-image:hover { filter: grayscale(0%) contrast(1.1); }
        .bio-text { flex: 1; }
        .bio-text h2 { font-size: 2.5rem; color: #fff; font-family: var(--font-heading); }
        .bio-text p { color: var(--text-secondary); font-size: 1.1rem; line-height: 1.8; margin-bottom: 1.5rem; }
        .bio-text strong { color: var(--text-primary); }
        @media (max-width: 900px) {
            .bio-container { flex-direction: column; text-align: center; gap: 2rem; }
            .bio-image-wrapper { flex: 0 0 250px; margin: 0 auto; }
            .bio-text .divider { margin: 1rem auto; }
        }
        /* Autor Highlights (Prueba Social Alta) */
        .autor-highlight { display: flex; align-items: center; background: rgba(10,10,10,0.8); backdrop-filter: blur(5px); max-width: 1200px; margin: 8rem auto; padding: 4rem; gap: 4rem; border-left: 4px solid var(--accent-gold); }
        .autor-img { width: 50%; height: 400px; object-fit: cover; filter: grayscale(80%); transition: var(--transition-smooth); }
        .autor-highlight:hover .autor-img { filter: grayscale(0%); }
        .autor-text { width: 50%; }
        .autor-text h3 { font-size: 2.5rem; margin-bottom: 1.5rem; }
        .quote { font-style: italic; color: var(--accent-gold); font-size: 1.2rem; border-left: 2px solid var(--accent-gold-dim); padding-left: 1.5rem; margin-bottom: 2rem; }

        /* Newsletter (Captación de Leads) */
        .newsletter { background: #080808; padding: 8rem 2rem; text-align: center; border-top: 1px solid rgba(255,255,255,0.02); }
        .newsletter h2 { font-size: 3rem; margin-bottom: 1rem; }
        .newsletter p { color: var(--text-secondary); margin-bottom: 3rem; max-width: 600px; margin-inline: auto; }
        .form-group { display: flex; justify-content: center; gap: 1rem; max-width: 600px; margin: 0 auto; }
        .form-group input { padding: 1.2rem 2rem; width: 100%; background: var(--bg-card); border: 1px solid rgba(255,255,255,0.1); color: white; outline: none; font-family: var(--font-body); }
        .form-group input:focus { border-color: var(--accent-gold); }
        
        /* Modal (Oculto por defecto) */
        .modal-overlay {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(0,0,0,0.9); backdrop-filter: blur(5px);
            display: flex; justify-content: center; align-items: center;
            z-index: 2000; opacity: 0; pointer-events: none; transition: var(--transition-smooth);
        }
        .modal-overlay.active { opacity: 1; pointer-events: auto; }
        .modal-content {
            background: var(--bg-surface); padding: 4rem; max-width: 500px; width: 100%;
            text-align: center; border: 1px solid var(--accent-gold-dim);
            transform: translateY(20px); transition: var(--transition-smooth);
        }
        .modal-overlay.active .modal-content { transform: translateY(0); }
        .modal-close { position: absolute; top: 1.5rem; right: 1.5rem; font-size: 2rem; color: var(--text-secondary); cursor: pointer; background:none; border:none; }
        .modal-btn { display: block; width: 100%; padding: 1.2rem; margin-bottom: 1rem; border: 1px solid rgba(255,255,255,0.1); color: white; background: transparent; cursor: pointer; transition: var(--transition-smooth); text-transform: uppercase; letter-spacing: 2px; font-size: 0.8rem; }
        .modal-btn:hover { background: rgba(255,255,255,0.05); border-color: var(--accent-gold); color: var(--accent-gold); }

        /* =========================================
           GALERÍA PREMIUM (VÍDEO & FOTOS)
           ========================================= */
        /* Video Thumbnails */
        .video-gallery-grid {
            display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem;
            max-width: 1000px; margin: 0 auto; padding: 0 2rem;
        }
        .video-thumbnail {
            position: relative; border-radius: 8px; overflow: hidden; aspect-ratio: 16/9;
            cursor: pointer; border: 1px solid rgba(255,255,255,0.05);
            transition: var(--transition-smooth);
        }
        .video-thumbnail:hover {
            transform: translateY(-5px);
            border-color: var(--accent-gold);
            box-shadow: 0 15px 30px rgba(212, 175, 55, 0.15);
        }
        .video-thumbnail-bg {
            position: absolute; top: 0; left: 0; width: 100%; height: 100%;
            background-size: cover; background-position: center; filter: brightness(0.4) grayscale(50%);
            transition: var(--transition-smooth);
        }
        .video-thumbnail:hover .video-thumbnail-bg {
            filter: brightness(0.6) grayscale(0%);
            transform: scale(1.05);
        }
        .video-overlay {
            position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
            width: 60px; height: 60px; background: rgba(0,0,0,0.6);
            border: 2px solid var(--accent-gold); border-radius: 50%;
            display: flex; justify-content: center; align-items: center;
            transition: var(--transition-smooth); backdrop-filter: blur(4px);
        }
        .video-thumbnail:hover .video-overlay {
            background: var(--accent-gold);
            box-shadow: 0 0 20px var(--accent-gold);
            transform: translate(-50%, -50%) scale(1.1);
        }
        .play-icon {
            width: 24px; height: 24px; color: var(--accent-gold); margin-left: 4px;
            transition: var(--transition-smooth);
        }
        .video-thumbnail:hover .play-icon { color: #000; }
        .video-title {
            position: absolute; bottom: 0; left: 0; width: 100%; padding: 1.5rem 1rem 1rem;
            background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
            color: #fff; font-family: var(--font-heading); font-size: 1.1rem;
            text-align: center; pointer-events: none;
        }

        /* Lightbox Modal */
        .lightbox-modal {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(0,0,0,0.95); backdrop-filter: blur(10px);
            display: flex; justify-content: center; align-items: center;
            z-index: 3000; opacity: 0; pointer-events: none;
            transition: opacity 0.4s ease;
        }
        .lightbox-modal.active { opacity: 1; pointer-events: auto; }
        .lightbox-content {
            position: relative; width: auto; max-width: 90vw; max-height: 90vh;
            display: flex; flex-direction: column; align-items: center; justify-content: center;
            transform: scale(0.95); transition: transform 0.4s ease;
        }
        .lightbox-modal.active .lightbox-content { transform: scale(1); }
        .lightbox-content video, .lightbox-content img { 
            width: auto; height: auto; max-width: 90vw; max-height: 80vh; display: block;
            border-radius: 8px; box-shadow: 0 20px 50px rgba(0,0,0,0.8); outline: none; border: 1px solid rgba(212, 175, 55, 0.3); 
        }
        .lightbox-close {
            position: fixed; top: 20px; right: 40px; font-size: 3rem;
            color: #fff; cursor: pointer; background: none; border: none;
            transition: color 0.3s ease; z-index: 3020; text-shadow: 0 0 10px rgba(0,0,0,0.5);
        }
        .lightbox-close:hover { color: var(--accent-gold); }
        .lightbox-caption {
            margin-top: 1rem; color: #fff; font-size: 1.1rem; text-align: center;
            font-family: var(--font-body); letter-spacing: 1px;
        }
        .lightbox-nav-btn {
            position: absolute; top: 50%; transform: translateY(-50%);
            background: rgba(10, 10, 10, 0.5); border: 1px solid var(--accent-gold-dim);
            color: var(--accent-gold); width: 50px; height: 50px; border-radius: 50%;
            display: flex; justify-content: center; align-items: center; font-size: 1.5rem;
            cursor: pointer; backdrop-filter: blur(5px); z-index: 3010;
            transition: var(--transition-smooth);
        }
        .lightbox-nav-btn:hover { background: var(--accent-gold); color: #000; box-shadow: 0 0 15px var(--accent-gold); }
        .lightbox-nav-btn.prev-btn { left: 2rem; }
        .lightbox-nav-btn.next-btn { right: 2rem; }

        /* Carrusel de Fotos */
        .photo-carousel-wrapper {
            position: relative; max-width: 900px; margin: 0 auto;
            display: flex; align-items: center; gap: 1rem; padding: 0 1rem;
        }
        .carousel-track-container {
            overflow: hidden; border-radius: 12px; width: 100%;
            box-shadow: 0 20px 40px rgba(0,0,0,0.5);
            border: 1px solid rgba(255,255,255,0.05);
        }
        .carousel-track {
            display: flex; transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
        }
        .carousel-slide {
            min-width: 100%; position: relative; background: rgba(0,0,0,0.6); display: flex; align-items: center; justify-content: center;
        }
        .carousel-slide img {
            width: 100%; height: 600px; object-fit: contain; display: block;
        }
        .slide-caption {
            position: absolute; bottom: 0; left: 0; width: 100%;
            padding: 2rem 1.5rem 1.5rem;
            background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
            color: #fff; font-family: var(--font-body); font-size: 0.9rem;
            text-align: center; letter-spacing: 1px;
        }
        .carousel-btn {
            background: rgba(10, 10, 10, 0.5); border: 1px solid var(--accent-gold-dim);
            color: var(--accent-gold); width: 50px; height: 50px; border-radius: 50%;
            display: flex; justify-content: center; align-items: center;
            cursor: pointer; backdrop-filter: blur(5px); z-index: 10;
            transition: var(--transition-smooth); flex-shrink: 0;
        }
        .carousel-btn:hover {
            background: var(--accent-gold); color: #000;
            box-shadow: 0 0 15px var(--accent-gold);
        }
        .carousel-nav {
            display: flex; justify-content: center; gap: 10px; margin-top: 1.5rem;
        }
        .carousel-indicator {
            width: 10px; height: 10px; border-radius: 50%;
            background: rgba(255,255,255,0.2); border: none; cursor: pointer;
            transition: var(--transition-smooth);
        }
        .carousel-indicator:hover { background: rgba(255,255,255,0.5); }
        .carousel-indicator.current-indicator {
            background: var(--accent-gold);
            box-shadow: 0 0 10px var(--accent-gold);
            transform: scale(1.2);
        }

        /* Responsive */
        @media (max-width: 900px) {
            .autor-highlight { flex-direction: column; padding: 2rem; }
            .autor-img, .autor-text { width: 100%; }
            nav { padding: 1rem; flex-direction: column; gap: 1rem; }
            .nav-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
            .hero-content { padding-top: 100px; }
            .logos-row { flex-wrap: wrap; gap: 1.5rem; padding: 0 1rem; }
            .section-obras { padding: 4rem 1rem; }
            .form-group { flex-direction: column; }
            .hero-title { font-size: 2.5rem; }
            .carousel-slide img { height: 400px; }
            .modal-content { padding: 2rem; }
        }