/* ============================================================================
   LAMARTINE — COMPONENTE: NAVEGACIÓN
   ============================================================================
   Navbar principal del sitio, menú mobile, breadcrumbs.
   
   USO:
     <header class="nav">
       <div class="nav__inner container">
         <a class="nav__brand" href="/">LAMARTINE</a>
         <nav class="nav__menu">...</nav>
         <div class="nav__actions">...</div>
       </div>
     </header>
   ============================================================================ */


/* ============================================================================
   NAVBAR PRINCIPAL
   ============================================================================ */

.nav {
    position: sticky;
    top: 0;
    z-index: var(--z-nav);
    background: var(--nav-bg);
    border-bottom: 1px solid transparent;
    transition: var(--transition-normal);
}

.nav.is-scrolled {
    background: var(--nav-bg-scrolled);
    border-bottom-color: var(--border-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}


/* --- INNER (contenedor interno) --- */
.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    height: var(--nav-height);
}

@media (max-width: 768px) {
    .nav__inner {
        height: var(--nav-height-mobile);
    }
}


/* --- BRAND (logo / nombre) --- */
.nav__brand {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 2.5vw, 1.875rem);
    font-weight: var(--fw-regular);
    letter-spacing: var(--tracking-widest);
    color: var(--color-negro);
    text-decoration: none;
    text-transform: uppercase;
    line-height: 1;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.nav__brand:hover {
    color: var(--color-acento);
}


/* --- MENÚ DESKTOP --- */
.nav__menu {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    flex: 1;
    justify-content: center;
}

.nav__link {
    font-family: var(--font-body);
    font-size: var(--fs-sm);
    font-weight: var(--fw-regular);
    color: var(--color-tierra);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    padding: var(--space-2) 0;
    position: relative;
    transition: var(--transition-fast);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--color-negro);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--duration-normal) var(--ease-out);
}

.nav__link:hover {
    color: var(--color-negro);
}

.nav__link:hover::after,
.nav__link.is-active::after {
    transform: scaleX(1);
}

.nav__link.is-active {
    color: var(--color-negro);
}


/* --- ACCIONES (iconos carrito, cuenta, buscar) --- */
.nav__actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-shrink: 0;
}

.nav__icon-btn {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--color-tierra);
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    border-radius: 50%;
    text-decoration: none;
}

.nav__icon-btn:hover {
    background: var(--color-beige-claro);
    color: var(--color-negro);
}

.nav__icon-btn svg {
    width: 20px;
    height: 20px;
    stroke-width: 1.5;
}


/* Badge del carrito (número de items) */
.nav__cart-badge {
    position: absolute;
    top: 4px;
    right: 4px;
    min-width: 18px;
    height: 18px;
    padding: 0 4px;
    background: var(--color-acento);
    color: var(--color-blanco);
    font-size: 10px;
    font-weight: var(--fw-semibold);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

.nav__cart-badge:empty,
.nav__cart-badge[data-count="0"] {
    display: none;
}


/* --- BOTÓN MENÚ MOBILE (hamburguesa) --- */
.nav__menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    color: var(--color-tierra);
    cursor: pointer;
    padding: 0;
    position: relative;
}

.nav__menu-toggle span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: currentColor;
    margin: 5px auto;
    transition: var(--transition-normal);
    transform-origin: center;
}

.nav__menu-toggle.is-open span:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
}

.nav__menu-toggle.is-open span:nth-child(2) {
    opacity: 0;
}

.nav__menu-toggle.is-open span:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
}


/* ============================================================================
   MENÚ MOBILE (slide panel)
   ============================================================================ */

.mobile-menu {
    position: fixed;
    top: var(--nav-height-mobile);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-crema);
    z-index: calc(var(--z-nav) - 1);
    transform: translateX(-100%);
    transition: transform var(--duration-normal) var(--ease-out);
    overflow-y: auto;
    padding: var(--space-8) var(--container-padding);
}

.mobile-menu.is-open {
    transform: translateX(0);
}

.mobile-menu__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.mobile-menu__link {
    display: block;
    padding: var(--space-3) 0;
    font-family: var(--font-display);
    font-size: var(--fs-xl);
    color: var(--color-negro);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-fast);
}

.mobile-menu__link:hover,
.mobile-menu__link.is-active {
    color: var(--color-acento);
    padding-left: var(--space-2);
}

.mobile-menu__footer {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}


/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (max-width: 968px) {
    .nav__menu {
        display: none;
    }
    
    .nav__menu-toggle {
        display: block;
    }
    
    .nav__inner {
        gap: var(--space-4);
    }
}

@media (min-width: 969px) {
    .mobile-menu {
        display: none;
    }
}


/* ============================================================================
   ANNOUNCEMENT BAR (barra superior con mensaje promocional)
   ============================================================================ */

.announcement-bar {
    background: var(--color-negro);
    color: var(--color-blanco);
    padding: var(--space-2) var(--space-4);
    text-align: center;
    font-size: var(--fs-xs);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    position: relative;
    z-index: calc(var(--z-nav) + 1);
}

.announcement-bar__inner {
    max-width: var(--container-xl);
    margin: 0 auto;
}

.announcement-bar__close {
    position: absolute;
    right: var(--space-2);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-blanco);
    cursor: pointer;
    width: 24px;
    height: 24px;
    opacity: 0.7;
    transition: var(--transition-fast);
}

.announcement-bar__close:hover {
    opacity: 1;
}


/* ============================================================================
   BREADCRUMBS
   ============================================================================ */

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
    padding: var(--space-4) 0;
    margin: 0;
    font-size: var(--fs-xs);
    color: var(--color-gris-medio);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
}

.breadcrumbs__item {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
}

.breadcrumbs__item:not(:last-child)::after {
    content: '/';
    color: var(--color-arena);
    margin: 0 var(--space-1);
}

.breadcrumbs__link {
    color: var(--color-gris-medio);
    text-decoration: none;
    transition: var(--transition-fast);
}

.breadcrumbs__link:hover {
    color: var(--color-negro);
}

.breadcrumbs__item--current {
    color: var(--color-negro);
    font-weight: var(--fw-medium);
}