/* =========================================
   ESTILO NETFLIX - JUVENIL, ELEGANTE Y SOMBRÍO
   ========================================= */
:root {
    --bg-color: #141414; /* Negro Netflix */
    --text-main: #e5e5e5;
    --text-muted: #808080;
    --accent-color: #c9a25e; /* Mantenemos el dorado gótico como acento */
    --accent-hover: #e5c385;
}

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

body.netflix-style {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: 'Montserrat', sans-serif; /* Tipografía moderna y limpia */
    overflow-x: hidden;
}

.Cinzel { font-family: 'Cinzel', serif; }

/* =========================================
   1. NAVBAR TRANSPARENTE A SÓLIDA
   ========================================= */
.top-nav {
    position: fixed;
    top: 0; width: 100%;
    padding: 20px 4%;
    display: flex; justify-content: space-between; align-items: center;
    z-index: 1000;
    background: linear-gradient(to bottom, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0) 100%);
    transition: background-color 0.4s ease;
}

.top-nav.scrolled {
    background-color: #141414; /* Se vuelve sólida al bajar */
    box-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.nav-left { display: flex; align-items: center; gap: 40px; }
.logo { color: var(--accent-color); font-size: 1.8rem; letter-spacing: 2px; text-shadow: 0 2px 4px rgba(0,0,0,0.5); }

.nav-links { display: flex; gap: 20px; }
.nav-links a { color: var(--text-main); text-decoration: none; font-size: 0.9rem; transition: color 0.3s; }
.nav-links a:hover, .nav-links a.active { color: var(--accent-color); font-weight: 500; }

.nav-right { display: flex; align-items: center; gap: 20px; }
.icon-btn { background: none; border: none; color: white; font-size: 1.2rem; cursor: pointer; }
.user-avatar { width: 35px; height: 35px; background: var(--accent-color); border-radius: 4px; cursor: pointer; }

/* =========================================
   2. HÉROE (BILLBOARD A PANTALLA COMPLETA)
   ========================================= */
.billboard {
    position: relative;
    width: 100%;
    height: 85vh; /* Ocupa casi toda la pantalla */
    background-size: cover;
    background-position: center top;
    /* Fondo por defecto si no hay imagen */
    background-color: #222; 
}

/* El difuminado negro en los bordes para fusionarse con el resto de la página */
.vignette-layer {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: 
        linear-gradient(to top, #141414 0%, transparent 20%),
        linear-gradient(to right, rgba(20,20,20,0.8) 0%, transparent 50%);
}

.billboard-info {
    position: absolute;
    top: 35%;
    left: 4%;
    width: 40%; /* Solo ocupa la mitad izquierda */
    z-index: 10;
}

.billboard-title {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 20px;
    text-shadow: 2px 2px 10px rgba(0,0,0,0.8);
    color: white;
}

.billboard-meta {
    display: flex; gap: 15px; align-items: center;
    font-size: 1rem; margin-bottom: 15px; font-weight: 500;
}
.match { color: #46d369; } /* Verde clásico de coincidencia */
.age-rating { border: 1px solid rgba(255,255,255,0.4); padding: 0 5px; }

.billboard-synopsis {
    font-size: 1.2rem;
    line-height: 1.5;
    color: #fff;
    text-shadow: 1px 1px 4px rgba(0,0,0,0.8);
    margin-bottom: 30px;
    display: -webkit-box;
    -webkit-line-clamp: 3; /* Corta el texto largo a 3 líneas */
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.btn-play, .btn-more-info {
    padding: 12px 28px;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    display: flex; align-items: center; gap: 10px;
    transition: all 0.2s ease;
}

.btn-play { background-color: white; color: black; }
.btn-play:hover { background-color: rgba(255,255,255,0.75); }

.btn-more-info { background-color: rgba(109, 109, 110, 0.7); color: white; }
.btn-more-info:hover { background-color: rgba(109, 109, 110, 0.4); }

/* =========================================
   3. FILAS DE CONTENIDO (SLIDERS HORIZONTALES)
   ========================================= */
.sliders-container {
    margin-top: -100px; /* Sube las filas sobre el gradiente del héroe */
    position: relative;
    z-index: 20;
    padding-bottom: 50px;
}

.slider-row {
    margin-bottom: 3vw;
}

.row-title {
    color: #e5e5e5;
    font-size: 1.4vw;
    font-weight: 500;
    margin: 0 4% 10px 4%;
}

.slider-container {
    padding: 0 4%;
}

.slider {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;
    padding: 15px 0; /* Espacio para el efecto de escala en hover */
    /* Ocultar barra de scroll para un look limpio */
    -ms-overflow-style: none;
    scrollbar-width: none;
}
.slider::-webkit-scrollbar { display: none; }

/* Tarjetas de Libros Verticales */
.book-card {
    flex: 0 0 calc(100% / 6 - 10px); /* 6 libros por fila aprox en desktop */
    position: relative;
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s ease;
    box-shadow: 0 2px 8px rgba(0,0,0,0.5);
    background-color: #222; /* Fondo por si no carga la imagen */
}

/* Animación pop-up juvenil y dinámica */
.book-card:hover {
    transform: scale(1.08);
    z-index: 10;
    box-shadow: 0 10px 20px rgba(0,0,0,0.8);
}

.book-image-fallback {
    width: 100%;
    aspect-ratio: 2 / 3; /* Proporción clásica de libro */
    position: relative;
    display: flex; justify-content: center; align-items: center; text-align: center; padding: 10px;
}

.book-image-fallback img {
    position: absolute; top: 0; left: 0;
    width: 100%; height: 100%; object-fit: cover;
}

.fallback-text {
    color: rgba(255,255,255,0.5);
    font-size: 1.2rem;
    z-index: 1; /* Por encima del gradiente de respaldo */
}

/* Barra de progreso de lectura (Continuar leyendo) */
.progress-bar-container {
    height: 4px;
    background-color: rgba(255,255,255,0.2);
    width: 100%;
    position: absolute; bottom: 0;
}
.progress-bar { height: 100%; background-color: #e50914; /* Rojo Netflix/Alerta */ }

/* Tarjetas de Género Horizontales */
.genre-slider .genre-card {
    flex: 0 0 calc(100% / 4 - 10px);
    aspect-ratio: 16 / 9;
    border-radius: 4px;
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    transition: transform 0.3s ease;
}
.genre-slider .genre-card:hover { transform: scale(1.05); }
.genre-slider .genre-card h4 {
    font-size: 1.5rem; color: white; text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
}

/* =========================================
   4. PIE DE PÁGINA
   ========================================= */
.netflix-footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* =========================================
   5. ADAPTACIÓN A MÓVILES (Corregida)
   ========================================= */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .logo { font-size: 1.2rem; }
    
    /* 1. Dejamos que el fondo principal crezca según el texto */
    .billboard { height: auto; min-height: 80vh; padding-bottom: 40px; }
    
    /* 2. Reacomodamos el bloque de texto para que fluya natural */
    .billboard-info { position: relative; top: auto; width: 90%; margin-top: 120px; }
    
    .billboard-title { font-size: 2.5rem; margin-bottom: 10px; }
    .billboard-meta { flex-wrap: wrap; margin-bottom: 10px; }
    .billboard-synopsis { font-size: 1rem; -webkit-line-clamp: 4; margin-bottom: 20px; }
    
    /* 3. Evitamos que los botones se aplasten */
    .billboard-buttons { flex-direction: column; gap: 10px; }
    .btn-play, .btn-more-info { width: 100%; justify-content: center; }
    
    /* 4. ¡LA SOLUCIÓN! Quitamos el margen negativo para que no se encimen */
    .sliders-container { margin-top: 0px; } 
    
    .row-title { font-size: 1.2rem; }
    
    /* Mostramos ~3 libros por pantalla, dejándolos deslizar */
    .book-card { flex: 0 0 calc(100% / 3.2); }
    .genre-slider .genre-card { flex: 0 0 calc(100% / 1.5); }
}