/* ============================================================
 * VilaTec 2.0 — Navegación y Mega-Menús
 * Mega-menús para: Inteligencia Artificial, Sistemas, Desarrollo
 * Menús simples: Sobre Nosotros, Contacto
 * ============================================================ */

/* ─── Navbar ──────────────────────────────────────────────────── */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1200;
    background: rgba(19, 19, 19, 0.82);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    transition: background 0.3s ease;
}

.navbar--scrolled {
    background: rgba(14, 14, 14, 0.96);
}

.navbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: 1.1rem;
    max-width: 1400px;
    margin-inline: auto;
    padding-inline: clamp(1.5rem, 5vw, 4rem);
    gap: 2rem;
}

.navbar__logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.navbar__logo img {
    width: 200px;
    height: auto;
}

/* ─── Nav Links ───────────────────────────────────────────────── */
.navbar__nav {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.25rem; /* VALOR EXACTO DEL BACKUP */
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
    list-style: none;
}

.nav-item__link {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    font-family: var(--font-headline);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color: rgba(229, 226, 225, 0.65);
    padding: 0.6rem 0.875rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    user-select: none;
    transition: color var(--transition-fast), background var(--transition-fast);
    white-space: nowrap;
}

.nav-item__link:hover,
.nav-item:hover .nav-item__link,
.nav-item--active .nav-item__link {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.nav-item--has-mega:hover .nav-item__link {
    color: var(--color-primary);
}

/* Chevron indicator */
.nav-item__chevron {
    font-size: 1rem;
    transition: transform var(--transition-fast);
    opacity: 0.5;
}
.nav-item:hover .nav-item__chevron { transform: rotate(180deg); opacity: 1; }

/* ─── Mega Menu Base ─────────────────────────────────────────── */
.mega-menu {
    position: absolute;
    top: calc(100% + 0.75rem);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 920px;
    background: rgba(8, 9, 12, 0.96);
    backdrop-filter: blur(24px) saturate(160%);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-xl);
    padding: 2.2rem;
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.7),
                inset 0 0 40px rgba(255, 255, 255, 0.02);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s ease,
                visibility 0.25s ease,
                transform 0.25s cubic-bezier(0.4,0,0.2,1);
    z-index: 999;
}

.nav-item:hover .mega-menu,
.nav-item.mega-open .mega-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

/* Ensure mega-menu stays open when hovering over it */
.mega-menu:hover { pointer-events: auto; }

/* Arrow pointing up */
.mega-menu::before {
    content: '';
    position: absolute;
    top: -7px;
    left: 50%;
    transform: translateX(-50%);
    width: 13px;
    height: 13px;
    background: rgba(18, 18, 18, 0.97);
    border-top: 1px solid rgba(255,255,255,0.07);
    border-left: 1px solid rgba(255,255,255,0.07);
    transform: translateX(-50%) rotate(45deg);
}

/* ─── Mega Menu Layout ───────────────────────────────────────── */
.mega-menu__grid {
    display: grid;
    gap: 2rem;
}

.mega-menu__grid--2col { grid-template-columns: 1fr 1fr; gap: 4rem; }
.mega-menu__grid--2col-side { grid-template-columns: 1.1fr 1.1fr 0.75fr; gap: 2.5rem; }

.mega-menu__col-title {
    font-family: var(--font-headline);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.mega-menu__col-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(0,102,255,0.2);
}

.mega-menu__col-title--secondary { color: var(--color-secondary); }
.mega-menu__col-title--secondary::after { background: rgba(255,140,0,0.2); }

/* ─── Mega Menu Items ────────────────────────────────────────── */
.mega-menu__items { display: flex; flex-direction: column; gap: 1.25rem; }

.mega-menu__item {
    display: flex;
    gap: 0.875rem;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
    text-decoration: none;
}

.mega-menu__item:hover { 
    background: linear-gradient(90deg, rgba(255,255,255,0.05) 0%, transparent 100%);
    transform: translateX(4px);
}

.mega-menu__item-icon {
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
}
.mega-menu__item--secondary .mega-menu__item-icon { color: var(--color-secondary); }

.mega-menu__item-content { display: flex; flex-direction: column; gap: 0.2rem; }

.mega-menu__item-title {
    font-family: var(--font-headline);
    font-size: 0.975rem;
    font-weight: 600;
    color: var(--color-on-surface);
    line-height: 1.3;
}
.mega-menu__item:hover .mega-menu__item-title { color: #fff; }

.mega-menu__item-desc {
    font-size: 0.85rem;
    color: var(--color-on-surface-variant);
    line-height: 1.45;
    font-weight: 400;
    opacity: 0.8;
}

/* ─── Mega Menu VersalIA Panel ───────────────────────────────── */
.mega-menu__panel-versalia {
    background: rgba(0, 102, 255, 0.05);
    border: 1px solid rgba(0,102,255,0.18);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 1rem;
}

.mega-menu__panel-versalia .versalia-brand { gap: 0; }

.mega-menu__versalia-desc {
    font-size: 0.78rem;
    color: var(--color-on-surface-variant);
    line-height: 1.55;
    font-weight: 300;
}

.mega-menu__versalia-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-primary);
    transition: gap var(--transition-fast);
    padding-top: 0.75rem;
    border-top: 1px solid rgba(0,102,255,0.15);
}
.mega-menu__versalia-link:hover { gap: 0.5rem; }

/* ─── Separator in mega menus ────────────────────────────────── */
.mega-menu__divider {
    height: 1px;
    background: rgba(255,255,255,0.04);
    margin-block: 0.5rem;
}

/* ─── Navbar Right Controls ──────────────────────────────────── */
.navbar__controls {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 0.125rem;
    font-family: var(--font-headline);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
}

.lang-switcher__btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.35rem 0.5rem;
    border-radius: var(--radius-sm);
    color: var(--color-muted);
    transition: color var(--transition-fast), background var(--transition-fast);
    font-family: inherit;
    font-size: inherit;
    font-weight: inherit;
    letter-spacing: inherit;
}
.lang-switcher__btn:hover { color: var(--color-on-surface); background: rgba(255,255,255,0.06); }
.lang-switcher__btn.active { color: var(--color-primary); background: rgba(0,102,255,0.1); }
.lang-switcher__sep { color: var(--color-outline); font-size: 0.7rem; }

/* ─── Mobile Hamburger ───────────────────────────────────────── */
.navbar__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 0.5rem;
    background: none;
    border: none;
    position: relative;
    z-index: 1201;
}
.navbar__hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-on-surface);
    border-radius: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.navbar__hamburger.open span {
    background: #ff9d00; /* Naranja corporativo VilaTec para la X de cierre */
}
.navbar__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.navbar__hamburger.open span:nth-child(2) { opacity: 0; }
.navbar__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ─── Mobile Menu Drawer (Premium) ───────────────────────────── */
.mobile-menu {
    display: none;
    position: fixed;
    inset: 0;
    top: 0;
    overflow-y: auto;
    background: rgba(14, 14, 14, 0.85);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    z-index: 1100;
    padding: 7rem 2rem 4rem;
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-left: 1px solid rgba(255, 255, 255, 0.08);
}
.mobile-menu.open { transform: translateX(0); }

.mobile-menu__list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-menu__item {
    font-family: var(--font-headline);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #fff;
    padding: 1.25rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    opacity: 0;
    transform: translateY(15px);
    transition: all 0.4s ease;
}

.mobile-menu.open .mobile-menu__item {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered entry */
.mobile-menu.open .mobile-menu__item:nth-child(1) { transition-delay: 0.1s; }
.mobile-menu.open .mobile-menu__item:nth-child(2) { transition-delay: 0.15s; }
.mobile-menu.open .mobile-menu__item:nth-child(3) { transition-delay: 0.2s; }
.mobile-menu.open .mobile-menu__item:nth-child(4) { transition-delay: 0.25s; }
.mobile-menu.open .mobile-menu__item:nth-child(5) { transition-delay: 0.3s; }

.mobile-menu .nav-item__chevron {
    font-size: 1.5rem;
    color: var(--color-primary);
}

.mobile-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
}
.mobile-submenu.open {
    max-height: 500px;
    margin-top: 0.5rem;
    margin-bottom: 1rem;
    padding: 1rem;
}

.mobile-submenu__link {
    font-size: 1rem;
    color: var(--color-on-surface-variant);
    font-weight: 400;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    transition: color 0.3s ease;
}
.mobile-submenu__link:hover { color: var(--color-primary); }

.mobile-submenu__icon {
    font-size: 1.25rem;
    color: var(--color-primary);
    opacity: 0.7;
}

.mobile-submenu__link--versalia {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-sm);
    justify-content: flex-start;
}

.mobile-submenu__versalia-logo {
    height: 60px;
    width: auto;
    filter: brightness(1.2) drop-shadow(0 0 15px rgba(59, 130, 246, 0.4));
}

/* ─── Responsive Adjustments ─────────────────────────────────── */
@media (max-width: 1024px) {
    .navbar__nav   { display: none !important; }
    .navbar__hamburger { 
        display: flex !important;
        position: relative;
        z-index: 1001;
    }
    .mobile-menu   { display: block; }
}

@media (max-width: 480px) {
    .navbar__inner { padding-inline: 1rem; gap: 0.5rem; }
    .navbar__logo img { width: 130px; }
    .lang-switcher, #navCtaBtn { display: none !important; }
    .mobile-menu .lang-switcher { display: flex !important; }
    .mobile-menu { padding-top: 5rem; }
}