/**
 * LAYOUT.CSS - Header, Footer y Grid General
 * Estructura principal de la aplicación
 */

/* ============================================
   BLOQUEO DE SCROLL (menu movil abierto)
   Se aplica con position:fixed en lugar de overflow:hidden para que no
   rompa el sticky-footer del body (que es flexbox columna).
   ============================================ */
body.mobile-nav-open {
  position: fixed;
  top: calc(-1 * var(--scroll-lock-y, 0));
  left: 0;
  right: 0;
  width: 100%;
  overflow: hidden;
}

/* En desktop el bloqueo de scroll NO debe usar position:fixed en el body:
   al "desaparecer" el header fijo momentáneamente (y volver a colocarse al
   cerrar) se notaba un salto/re-animación del desplegable. Con overflow:hidden
   basta para impedir el scroll y todo queda en su sitio. */
@media (min-width: 1024px) {
  body.mobile-nav-open {
    position: static;
    top: auto;
    overflow: hidden;
  }
}

/* ============================================
   HEADER / NAVEGACIÓN
   ============================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  background-color: var(--color-surface);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--color-border);
  transition: transform var(--transition-base);
  will-change: transform;
}

/* Header "inteligente": se desliza fuera de pantalla al scrollear hacia
   abajo y vuelve a aparecer de inmediato al scrollear hacia arriba, de modo
   que el acceso al carrito esté siempre disponible (ver initHeaderAutoHide
   en js/ui.js). */
.site-header--hidden {
  transform: translateY(-100%);
}

/* Compensar la altura del header fijo para que el contenido no quede
   debajo. El valor real de la altura se fija por JS (--header-h). */
body {
  padding-top: var(--header-h, 68px);
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4);
  gap: var(--spacing-4);
}

.header__logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}

.header__logo:hover {
  color: var(--color-primary-dark);
}

/* Botón hamburguesa: visible en TODAS las vistas.
   - Desktop: abre un pequeño desplegable bajo el header.
   - Movil/tablet: abre la barra de navegacion inferior (que ahora es
     overlay, no ocupa espacio fijo, para que el header quede completo). */

.hamburger-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: var(--spacing-2);
  gap: 5px;
}

.hamburger-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-gray-700);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.hamburger-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.hamburger-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Navegación desktop */
.desktop-nav {
  display: none;
}

.desktop-nav__list {
  display: flex;
  list-style: none;
  gap: var(--spacing-6);
}

.desktop-nav__link {
  font-weight: 500;
  color: var(--color-gray-700);
  padding: var(--spacing-2) 0;
  position: relative;
}

.desktop-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

.desktop-nav__link:hover::after,
.desktop-nav__link.active::after {
  width: 100%;
}

/* Carrito en header */
.header__cart {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--color-gray-700);
}

.cart-icon {
  font-size: var(--font-size-xl);
}

.cart-count {
  position: absolute;
  top: -8px;
  right: -8px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: var(--font-size-xs);
  font-weight: 700;
  min-width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2px;
}

/* ============================================
   MENÚ MÓVIL (barra inferior tipo overlay)
   ============================================ */
.mobile-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--color-surface);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  z-index: var(--z-fixed);
  display: flex;
  justify-content: space-around;
  padding: var(--spacing-2) var(--spacing-4);
  padding-bottom: max(var(--spacing-2), env(safe-area-inset-bottom));
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

/* Sombra inferior al header: mantiene el carrito/hamburguesa legibles
   cuando el contenido pasa por debajo (sticky en todas las vistas). */
.site-header {
  box-shadow: var(--shadow-md);
}

.mobile-nav--open {
  transform: translateY(0);
}

.mobile-nav__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-1);
  color: var(--color-gray-600);
  font-size: var(--font-size-xs);
  text-decoration: none;
  padding: var(--spacing-2);
  transition: color var(--transition-fast);
}

.mobile-nav__item:hover,
.mobile-nav__item.active {
  color: var(--color-primary);
}

.mobile-nav__icon {
  font-size: var(--font-size-xl);
}

/* Overlay para menú móvil lateral. SOLO en pantallas < 1024px: en desktop el
   desplegable es una tarjeta flotante y un overlay a pantalla completa tapaba
   la página, provocando dobles cierres/clics fantasma que "rompían" la
   animación de apertura del botón hamburguesa. */
@media (max-width: 1023.98px) {
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-fixed) - 1);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
  }

  .nav-overlay--show {
    opacity: 1;
    visibility: visible;
  }
}

@media (min-width: 1024px) {
  .nav-overlay {
    display: none !important;
  }
}

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  /* En claro es casi negro; en oscuro se vuelve superficie elevada (definido
     por js/theme.js via --footer-bg). */
  background-color: var(--footer-bg, var(--color-gray-900));
  color: var(--color-gray-300);
  padding: var(--spacing-6) 0;
  margin-top: auto;
}

.footer__content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
}

@media (min-width: 768px) {
  .footer__content {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer__section h3 {
  color: var(--color-white);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-4);
}

.footer__section p,
.footer__section a {
  color: var(--color-gray-400);
  margin-bottom: var(--spacing-2);
  display: block;
}

.footer__section a:hover {
  color: var(--color-white);
}

.footer__social {
  display: flex;
  gap: var(--spacing-4);
  margin-top: var(--spacing-4);
}

.footer__social a {
  font-size: var(--font-size-xl);
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer__social a:hover {
  color: var(--color-primary-light);
}

.footer__bottom {
  border-top: 1px solid var(--color-gray-800);
  margin-top: var(--spacing-8);
  padding-top: var(--spacing-6);
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-gray-500);
}

/* ============================================
   GRID DE PRODUCTOS
   ============================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: var(--spacing-4);
}

@media (min-width: 480px) {
  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-5);
  }
}

@media (min-width: 768px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-6);
  }
}

@media (min-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ============================================
   LAYOUT CON SIDEBAR (PC)
   ============================================ */
.page-layout {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 200px);
}

@media (min-width: 1024px) {
  .page-layout--sidebar {
    flex-direction: row;
    gap: var(--spacing-8);
  }
  
  .page-sidebar {
    width: 280px;
    flex-shrink: 0;
    position: sticky;
    top: 100px;
    align-self: flex-start;
  }
  
  .page-main {
    flex: 1;
    min-width: 0;
  }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: var(--color-white);
  padding: var(--spacing-12) 0;
  text-align: center;
}

.hero__title {
  color: var(--color-white);
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-4);
}

@media (min-width: 768px) {
  .hero__title {
    font-size: var(--font-size-4xl);
  }
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto var(--spacing-6);
}

/* Hero con degradado: el texto blanco sobre gradientes de acento (hero,
   currency-bar) se mantiene en ambos temas; solo se oscurece levemente la
   imagen del hero para que no "deslumbre" en modo oscuro. */
:root[data-theme="dark"] .hero__image,
:root[data-theme="dark"] .hero img {
  filter: brightness(0.85) saturate(0.95);
}

.hero__search {
  max-width: 500px;
  margin: 0 auto;
}

/* ============================================
   FILTROS DE CATEGORÍA
   ============================================ */
.category-filters {
  display: flex;
  gap: var(--spacing-2);
  overflow-x: auto;
  /* Altura compacta: los chips miden su propio alto (linea + padding), sin
     rellenos verticales extra del contenedor. */
  padding: 0;
  margin-bottom: var(--spacing-4);
  /* Scroll habilitado pero SIN barra visible (scrollbar-width:none en Firefox,
     ::-webkit-scrollbar{display:none} abajo en Chrome/Safari/Edge). */
  scrollbar-width: none;
  -ms-overflow-style: none;
}

/* Ocultar la barra de scroll nativa manteniendo el desplazamiento */
.category-filters::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

@media (min-width: 768px) {
  .category-filters {
    flex-wrap: wrap;
    overflow-x: visible;
  }
}

/* ============================================
   PÁGINA DE PRODUCTO INDIVIDUAL
   ============================================ */
.product-detail {
  display: grid;
  gap: var(--spacing-6);
}

@media (min-width: 768px) {
  .product-detail {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-8);
  }
}

.product-detail__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: var(--color-gray-100);
}

.product-detail__info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.product-detail__price {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  flex-wrap: wrap;
}

.price--current {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

.price--old {
  font-size: var(--font-size-lg);
  color: var(--color-gray-400);
  text-decoration: line-through;
}

.price--offer-badge {
  background-color: var(--color-accent);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: 600;
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
}

/* ============================================
   SECCIONES GENÉRICAS
   ============================================ */
.section {
  padding: var(--spacing-12) 0;
}

.section__title {
  text-align: center;
  margin-bottom: var(--spacing-8);
}

/* Modificador compacto para secciones que solo contienen chips/filtros
   (p. ej. "Categorías" en el home): menos padding vertical y un titulo con
   menos margen, para que la franja no ocupe media pantalla. */
.section--compact {
  padding: var(--spacing-4) 0;
}

.section--compact .section__title {
  margin-bottom: var(--spacing-3);
}

.section--light {
  background-color: var(--color-bg-muted);
}

.section--border {
  border-top: 1px solid var(--color-border);
}

/* ============================================
   DESTACADOS EN CARRUSEL HORIZONTAL
   ============================================ */
.products-grid--scroll {
  display: flex;
  grid-template-columns: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: var(--spacing-2, 8px);
  -webkit-overflow-scrolling: touch;
  /* Scroll habilitado pero SIN barra visible (igual que los chips de
     categorías): scrollbar-width:none en Firefox y ::-webkit-scrollbar
     oculto abajo en Chrome/Safari/Edge. */
  scrollbar-width: none;
  -ms-overflow-style: none;
}

/* Ocultar la barra de scroll nativa manteniendo el desplazamiento */
.products-grid--scroll::-webkit-scrollbar {
  display: none;
  width: 0;
  height: 0;
}

.products-grid--scroll > * {
  flex: 0 0 240px;
  scroll-snap-align: start;
}

/* ============================================
   BOTÓN FLOTANTE "VOLVER ARRIBA"
   ============================================ */
.scroll-top-btn {
  position: fixed;
  right: var(--spacing-4, 16px);
  bottom: calc(var(--spacing-4, 16px) + env(safe-area-inset-bottom, 0px));
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full, 9999px);
  border: none;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: var(--font-size-xl, 20px);
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  z-index: calc(var(--z-fixed) + 1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base), background-color var(--transition-fast);
}

.scroll-top-btn--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top-btn:hover {
  background-color: var(--color-primary-dark);
}

/* En pantallas pequeñas: si el menu esta abierto, sube el boton para no taparlo;
   ademas se oculta al llegar al final de la pagina para que nunca tape los
   enlaces del footer (p. ej. "Contacto") */
@media (max-width: 767.98px) {
  .mobile-nav--open ~ .scroll-top-btn,
  body:has(.mobile-nav--open) .scroll-top-btn {
    bottom: 90px;
  }

  body.at-page-bottom .scroll-top-btn {
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    pointer-events: none;
  }
}

/* ============================================
   MENÚ MÓVIL EN DESKTOP: desplegable bajo la hamburguesa
   ============================================ */
@media (min-width: 1024px) {
  /* El header es fixed en todas las vistas; el menu desktop se muestra
     como barra y la hamburguesa abre un desplegable anclado al header. */
  .hamburger-btn {
    display: flex;
    order: 3; /* a la derecha del icono del carrito */
  }
  .header__cart {
    order: 2;
  }
  .mobile-nav {
    top: calc(100% + 6px);
    bottom: auto;
    left: auto;
    right: var(--spacing-4, 16px);
    width: 230px;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    gap: var(--spacing-1);
    padding: var(--spacing-2);
    border-radius: var(--radius-lg, 12px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }
  .mobile-nav--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .mobile-nav__item {
    flex-direction: row;
    justify-content: flex-start;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    border-radius: var(--radius-md, 8px);
    font-size: var(--font-size-sm);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
    text-decoration: none;
  }
  .mobile-nav__item:hover {
    background-color: var(--color-gray-100);
  }
  .mobile-nav__icon {
    font-size: var(--font-size-lg);
  }
}

/* ============================================
   FOOTER SIMPLE (una linea)
   ============================================ */
.site-footer--simple {
  /* Mas aire vertical para que el footer no se vea apretado/pegado */
  padding: var(--spacing-6, 24px) 0;
  min-height: 72px;
  box-sizing: border-box;
}

.footer-simple {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-4, 16px);
  flex-wrap: wrap;
}

.footer-simple__brand {
  font-weight: 700;
  color: var(--color-white);
}

.footer-simple__links {
  display: flex;
  align-items: center;
  gap: var(--spacing-5, 20px);
}

.footer-simple__links a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-simple__links a:hover {
  color: var(--color-white);
}

.footer-simple__copy {
  opacity: 0.7;
  font-size: var(--font-size-sm, 13px);
}

@media (max-width: 599.98px) {
  .footer-simple {
    justify-content: center;
    text-align: center;
  }
}