/* --- VARIABLES BASE --- */
:root {
  --primary-bg-color: #141414;
  --secondary-bg-color: #202020;
  --sidebar-bg-color: #0c0c0c;
  --text-color: #e4e4e4;
  --text-color-secondary: #a0a0a0;
  --accent-color: #e50914;
  --accent-hover: #f40612;
  --border-color: #303030;
  --card-shadow: rgba(0, 0, 0, 0.5);
  --sidebar-width: 240px;
  --spacing: 1rem;
  --radius: 8px;
  --poster-ratio: 0.67;
  --transition-fast: 0.2s ease;
  --transition-medium: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-main: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

/* --- RESET + BODY --- */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-main);
  background-color: var(--primary-bg-color);
  color: var(--text-color);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- SIDEBAR DE NAVEGACIÓN --- */
.sidebar {
  background-color: var(--sidebar-bg-color);
  position: fixed;
  top: 0;
  left: 0;
  height: 100%;
  width: var(--sidebar-width);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: calc(var(--spacing) * 1.5);
  border-right: 1px solid var(--border-color);
  transform: translateX(0);
  transition: transform var(--transition-medium);
}

.sidebar-header .logo {
  color: var(--accent-color);
  font-size: 2.5rem;
  text-align: center;
  font-weight: bold;
  letter-spacing: 2px;
  margin: 0 0 var(--spacing) 0;
}

.sidebar-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-nav li a {
  display: flex;
  align-items: center;
  gap: var(--spacing);
  padding: var(--spacing) calc(var(--spacing) * 1.2);
  color: var(--text-color-secondary);
  text-decoration: none;
  font-size: 1.1rem;
  border-radius: var(--radius);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar-nav li a:hover {
  background-color: var(--secondary-bg-color);
  color: var(--text-color);
}

.sidebar-nav li a svg {
  width: 24px;
  height: 24px;
}

/* --- BOTÓN MENÚ MÓVIL (HAMBURGUESA) --- */
#menu-toggle {
  display: none; /* Oculto por defecto */
  position: fixed;
  top: 15px;
  left: 15px;
  z-index: 1001;
  background: rgba(12, 12, 12, 0.7);
  border: 1px solid var(--border-color);
  color: var(--text-color);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  cursor: pointer;
  padding: 10px;
}

/* --- OVERLAY --- */
.overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 999;
}

.sidebar.active ~ .overlay {
  display: block;
}


/* --- CONTENEDOR PRINCIPAL --- */
main {
  padding: calc(var(--spacing) * 2);
  transition: margin-left var(--transition-medium);
  margin-left: var(--sidebar-width); /* Espacio para la sidebar */
}

header {
  text-align: left;
  margin-bottom: var(--spacing);
}

header h1 {
  color: var(--text-color);
  font-size: 2.2rem;
  font-weight: 700;
  margin: 0;
}

/* --- FILTROS --- */
.filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  gap: var(--spacing);
  padding: var(--spacing) 0;
  margin-bottom: calc(var(--spacing) * 1.5);
}

.filters label {
  font-size: 1rem;
  color: var(--text-color-secondary);
}

.filters select {
  padding: 0.7rem 1.2rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background-color: var(--secondary-bg-color);
  color: var(--text-color);
  font-size: 1rem;
  appearance: none;
  cursor: pointer;
  transition: var(--transition-fast);
  background-image: url('data:image/svg+xml;utf8,<svg fill="%23e4e4e4" height="24" viewBox="0 0 24 24"><path d="M7 10l5 5 5-5z"/></svg>');
  background-repeat: no-repeat;
  background-position: right 0.8rem center;
  background-size: 1.2em;
  padding-right: 3rem;
}

.filters select:hover,
.filters select:focus {
  border-color: var(--accent-color);
  box-shadow: 0 0 0 2px rgba(229, 9, 20, 0.4);
  outline: none;
}

/* --- REJILLA DE PELÍCULAS --- */
.content-grid {
  display: grid;
  gap: calc(var(--spacing) * 1.5);
  padding: var(--spacing) 0;
}

/* --- TARJETA DE CONTENIDO --- */
.content-item {
  background-color: var(--secondary-bg-color);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 8px var(--card-shadow);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  border: 2px solid transparent; /* Borde para el efecto hover */
}

.content-item:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 20px var(--card-shadow);
  border-color: var(--accent-color);
}

.image-container {
  width: 100%;
  padding-top: calc(100% / var(--poster-ratio));
  position: relative;
  background-color: #000;
  overflow: hidden;
}

.image-container img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-medium);
}

.content-item:hover .image-container img {
  transform: scale(1.1);
}

.content-item h3 {
  font-size: 1.1rem;
  font-weight: 500;
  margin: 0.8rem;
  color: var(--text-color);
  white-space: normal;
  height: 3em; /* aprox 2 líneas */
  line-height: 1.5em;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* --- PAGINACIÓN --- */
.pagination-controls {
  display: flex;
  justify-content: center;
  gap: var(--spacing);
  margin-top: calc(var(--spacing) * 2);
}

.pagination-controls button {
  background-color: var(--accent-color);
  color: white;
  border: none;
  padding: 0.8rem 1.4rem;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: bold;
  cursor: pointer;
  transition: var(--transition-fast);
}

.pagination-controls button:hover:not(:disabled) {
  background-color: var(--accent-hover);
  transform: scale(1.05);
}

.pagination-controls button:disabled {
  background-color: #555;
  cursor: not-allowed;
  opacity: 0.6;
}

/* --- DISEÑO RESPONSIVO (Mobile-First) --- */
/* Móvil Pequeño (hasta 600px) - 2 columnas */
.content-grid {
    grid-template-columns: repeat(2, 1fr);
}

/* Tablet (601px - 900px) - 3 columnas */
@media (min-width: 601px) {
  .content-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Escritorio Pequeño (901px - 1200px) - 4 columnas */
@media (min-width: 901px) {
  .content-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Escritorio Grande (1201px y más) - 5 columnas */
@media (min-width: 1201px) {
  .content-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}


/* --- Media Query para el cambio de Navegación (768px) --- */
@media (max-width: 768px) {
  main {
    margin-left: 0; /* Sin margen en móvil */
    padding: var(--spacing);
  }

  header h1 {
      font-size: 1.8rem;
      margin-top: 60px; /* Espacio para el botón de hamburguesa */
      text-align: center;
  }
    
  .filters {
      justify-content: center;
  }

  .sidebar {
    transform: translateX(-100%); /* Oculta la sidebar fuera de la pantalla */
    box-shadow: 5px 0 15px rgba(0,0,0,0.4);
  }

  .sidebar.active {
    transform: translateX(0); /* Muestra la sidebar */
  }

  #menu-toggle {
    display: block; /* Muestra el botón de hamburguesa */
  }
}