/**
 * Navigation Bar & Multi-Tier Mega-Menu Styles
 * Brand: Rowtech (Pvt) Ltd
 */

/* =======================================================================
   1. Header Wrapper & Topbar Utility Bar
   ======================================================================= */
.site-header {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    z-index: 1000 !important;
    background-color: transparent;
    border-bottom: 1px solid transparent;
    box-shadow: none;
    transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.site-header.is-scrolled {
    background-color: rgba(8, 15, 24, 0.92) !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12) !important;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22) !important;
    backdrop-filter: blur(12px) !important;
    -webkit-backdrop-filter: blur(12px) !important;
}

/* Fallback / specific page header rules */
.home-page .site-header,
.about-page .site-header,
.contact-page .site-header,
.products-page .site-header,
.services-page .site-header,
.product-details-page .site-header {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    z-index: 1000 !important;
}

.home-page .navbar-brand__logo,
.home-page .nav-link,
.about-page .navbar-brand__logo,
.about-page .nav-link,
.contact-page .navbar-brand__logo,
.contact-page .nav-link,
.products-page .navbar-brand__logo,
.products-page .nav-link,
.services-page .navbar-brand__logo,
.services-page .nav-link,
.product-details-page .navbar-brand__logo,
.product-details-page .nav-link {
    color: var(--color-text-inverse);
}

.home-page .navbar-brand__tagline,
.about-page .navbar-brand__tagline,
.contact-page .navbar-brand__tagline,
.products-page .navbar-brand__tagline,
.services-page .navbar-brand__tagline,
.product-details-page .navbar-brand__tagline {
    color: rgba(255, 255, 255, 0.78);
}

.home-page .mobile-nav-toggle,
.about-page .mobile-nav-toggle,
.contact-page .mobile-nav-toggle,
.products-page .mobile-nav-toggle,
.services-page .mobile-nav-toggle,
.product-details-page .mobile-nav-toggle {
    color: var(--color-text-inverse);
}

.home-page .mobile-nav-toggle__bar,
.about-page .mobile-nav-toggle__bar,
.contact-page .mobile-nav-toggle__bar,
.products-page .mobile-nav-toggle__bar,
.services-page .mobile-nav-toggle__bar,
.product-details-page .mobile-nav-toggle__bar {
    background-color: currentColor;
}

.home-page .site-header.is-scrolled,
.about-page .site-header.is-scrolled,
.contact-page .site-header.is-scrolled,
.products-page .site-header.is-scrolled,
.services-page .site-header.is-scrolled,
.product-details-page .site-header.is-scrolled {
    background-color: rgba(8, 15, 24, 0.88) !important;
    border-bottom-color: rgba(255, 255, 255, 0.12) !important;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22) !important;
    backdrop-filter: blur(12px) !important;
    -webkit-backdrop-filter: blur(12px) !important;
}

.home-page .site-header.is-scrolled .navbar-brand__logo,
.home-page .site-header.is-scrolled .nav-link,
.about-page .site-header.is-scrolled .navbar-brand__logo,
.about-page .site-header.is-scrolled .nav-link,
.contact-page .site-header.is-scrolled .navbar-brand__logo,
.contact-page .site-header.is-scrolled .nav-link,
.products-page .site-header.is-scrolled .navbar-brand__logo,
.products-page .site-header.is-scrolled .nav-link,
.services-page .site-header.is-scrolled .navbar-brand__logo,
.services-page .site-header.is-scrolled .nav-link,
.product-details-page .site-header.is-scrolled .navbar-brand__logo,
.product-details-page .site-header.is-scrolled .nav-link {
    color: var(--color-text-inverse) !important;
}

.home-page .site-header.is-scrolled .navbar-brand__tagline,
.about-page .site-header.is-scrolled .navbar-brand__tagline,
.contact-page .site-header.is-scrolled .navbar-brand__tagline,
.products-page .site-header.is-scrolled .navbar-brand__tagline,
.services-page .site-header.is-scrolled .navbar-brand__tagline,
.product-details-page .site-header.is-scrolled .navbar-brand__tagline {
    color: rgba(255, 255, 255, 0.72) !important;
}

.home-page .site-header.is-scrolled .mobile-nav-toggle,
.about-page .site-header.is-scrolled .mobile-nav-toggle,
.contact-page .site-header.is-scrolled .mobile-nav-toggle,
.products-page .site-header.is-scrolled .mobile-nav-toggle,
.services-page .site-header.is-scrolled .mobile-nav-toggle,
.product-details-page .site-header.is-scrolled .mobile-nav-toggle {
    color: var(--color-text-inverse) !important;
}

/* Leave clear breathing room below the fixed navigation on inner-page heroes. */
.about-page .page-header,
.contact-page .page-header,
.products-page .page-header,
.services-page .page-header,
.product-details-page .page-header {
    padding-top: clamp(8.5rem, 14vh, 11rem) !important;
}

@media (max-width: 640px) {

    .about-page .page-header,
    .contact-page .page-header,
    .products-page .page-header,
    .services-page .page-header,
    .product-details-page .page-header {
        padding-top: 7rem !important;
    }
}

/* Secondary Top Bar (Quick Contact Strip) */
.header-topbar {
    background-color: var(--color-primary);
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.8125rem;
    padding: 0.4rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-topbar__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-topbar__meta,
.header-topbar__contact {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.header-topbar__link {
    color: rgba(255, 255, 255, 0.85);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.header-topbar__link:hover {
    color: var(--color-accent);
}

/* =======================================================================
   2. Primary Main Navbar
   ======================================================================= */
.main-navbar {
    height: var(--header-height);
    transition: height var(--transition-fast);
}

.site-header.is-scrolled .main-navbar {
    height: var(--header-height-scrolled);
}

.main-navbar__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Brand Identity / Logo */
.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.navbar-brand__logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: var(--font-weight-black);
    color: var(--color-primary);
    letter-spacing: -0.03em;
    text-transform: uppercase;
}

.navbar-brand__logo span {
    color: var(--color-accent);
}

.navbar-brand__tagline {
    display: block;
    font-size: 0.6875rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

/* Desktop Navigation Menu Links */
.navbar-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    height: 100%;
}

.nav-item {
    height: 100%;
    display: flex;
    align-items: center;
}

.nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0 1.1rem;
    height: 100%;
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-title);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 1.1rem;
    right: 1.1rem;
    height: 3px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition-fast);
}

.nav-item:hover .nav-link,
.nav-item.is-active .nav-link {
    color: var(--color-accent);
}

.nav-item:hover .nav-link::after,
.nav-item.is-active .nav-link::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-link__icon {
    width: 8px;
    height: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg) translateY(-2px);
    transition: transform var(--transition-fast);
}

.nav-item--has-mega {
    position: relative;
}

.nav-item:hover .nav-link__icon {
    transform: rotate(-135deg) translateY(-2px);
}

/* =======================================================================
   3. Desktop Mega-Menu Dropdown Panel
   ======================================================================= */
.mega-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    width: min(900px, calc(100vw - 2rem));
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 3px solid var(--color-accent);
    box-shadow: var(--shadow-mega-menu);
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, 10px);
    pointer-events: none;
    transition: opacity var(--transition-normal), transform var(--transition-normal), visibility var(--transition-normal);
    z-index: 999;
}

/* Active State for Desktop (controlled via JS or hover intent) */
.nav-item--has-mega.is-open .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
    pointer-events: auto;
}

.mega-menu__container {
    display: grid;
    grid-template-columns: minmax(230px, 0.85fr) minmax(300px, 1.15fr);
    min-height: 300px;
    max-height: min(470px, calc(100vh - 140px));
    padding: 0;
    overflow: hidden;
}

.mega-menu__categories {
    padding: 0.7rem 0;
    background-color: var(--color-surface-alt);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
}

.mega-menu__category,
.mega-menu__subcategory {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    color: var(--color-text-body);
    font-size: 0.9rem;
    font-weight: var(--font-weight-semibold);
    line-height: 1.35;
    padding: 0.8rem 1.1rem;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.mega-menu__category:hover,
.mega-menu__category.is-selected,
.mega-menu__subcategory:hover {
    color: var(--color-accent);
    background-color: var(--color-surface);
}

.mega-menu__category-arrow {
    color: currentColor;
    font-size: 1.5rem;
    font-weight: var(--font-weight-regular);
    line-height: 0.8;
}

.mega-menu__panels {
    padding: 1.35rem 1.5rem;
    overflow-y: auto;
}

.mega-menu__panel {
    display: none;
}

.mega-menu__panel.is-active {
    display: block;
}

.mega-menu__panel-title {
    display: block;
    color: var(--color-primary);
    font-size: 1rem;
    font-weight: var(--font-weight-bold);
    padding-bottom: 0.8rem;
    margin-bottom: 0.35rem;
    border-bottom: 2px solid var(--color-accent-soft);
}

.mega-menu__panel-title:hover,
.mega-menu__link:hover {
    color: var(--color-accent);
}

.mega-menu__subcategories {
    display: grid;
    gap: 0.25rem;
}

.mega-menu__cascade {
    display: grid;
    grid-template-columns: minmax(175px, 0.8fr) minmax(220px, 1.2fr);
    gap: 1.25rem;
}

.mega-menu__subcategory {
    padding: 0.75rem 0.65rem;
    border-bottom: 1px solid var(--color-border);
}

.mega-menu__list {
    display: grid;
    gap: 0.35rem;
}

.mega-menu__product-panels {
    min-width: 0;
}

.mega-menu__product-panel {
    display: none;
}

.mega-menu__product-panel.is-active {
    display: block;
}

.mega-menu__product-title {
    display: block;
    color: var(--color-primary);
    font-size: 0.95rem;
    font-weight: var(--font-weight-bold);
    line-height: 1.35;
    padding-bottom: 0.75rem;
    margin-bottom: 0.45rem;
    border-bottom: 2px solid var(--color-accent-soft);
}

.mega-menu__link {
    display: block;
    color: var(--color-text-body);
    font-size: 0.875rem;
    line-height: 1.4;
    padding: 0.35rem 0;
    transition: color var(--transition-fast);
}

.mega-menu__link::before {
    content: '\203A';
    color: var(--color-accent);
    margin-right: 0.45rem;
}

.mega-menu__empty {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* =======================================================================
   4. Mobile Hamburger Button & Drawer
   ======================================================================= */
.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: #FFFFFF !important;
    position: relative;
    z-index: 1000000 !important;
}

.mobile-nav-toggle__bar {
    display: block;
    width: 26px;
    height: 3px;
    margin: 5px auto;
    background-color: #FFFFFF !important;
    border-radius: 2px;
    transition: all var(--transition-normal);
}

/* Hamburger to Cross (X) */
.mobile-nav-toggle.is-active .mobile-nav-toggle__bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.mobile-nav-toggle.is-active .mobile-nav-toggle__bar:nth-child(2) {
    opacity: 0;
}

.mobile-nav-toggle.is-active .mobile-nav-toggle__bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.mobile-nav-toggle.is-active .mobile-nav-toggle__bar {
    background-color: var(--color-primary) !important;
}

/* Mobile Drawer Overlay Backdrop */
.mobile-drawer-overlay {
    position: fixed !important;
    inset: 0 !important;
    width: 100vw !important;
    height: 100vh !important;
    height: 100dvh !important;
    background-color: rgba(15, 29, 47, 0.65) !important;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
    z-index: 999990 !important;
}

.mobile-drawer-overlay.is-active {
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
}

/* Mobile Slide-In Drawer (Compact, Sleek, Pro-Grade with Amber Accent) */
.mobile-drawer {
    position: fixed !important;
    top: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    width: 82% !important;
    max-width: 290px !important;
    height: 100% !important;
    height: 100vh !important;
    height: 100dvh !important;
    background-color: var(--color-surface) !important;
    border-top-left-radius: 18px !important;
    border-bottom-left-radius: 18px !important;
    border-left: 2px solid rgba(230, 126, 34, 0.4) !important;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(230, 126, 34, 0.12) !important;
    z-index: 999999 !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain !important;
    touch-action: pan-y !important;
    padding: 1.25rem 1.15rem 3.5rem 1.15rem !important;
    transform: translateX(100%) !important;
    transition: transform var(--transition-normal) cubic-bezier(0.16, 1, 0.3, 1) !important;
}

.mobile-drawer.is-active {
    transform: translateX(0) !important;
}

/* Mobile Drawer Top Bar & Close Button */
.mobile-drawer-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--color-border);
}

.mobile-drawer-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background-color: rgba(15, 29, 47, 0.07);
    border: 1px solid transparent;
    color: var(--color-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mobile-drawer-close:hover,
.mobile-drawer-close:active {
    background-color: var(--color-accent);
    color: #FFFFFF;
    border-color: var(--color-accent);
    transform: rotate(90deg);
}

/* Mobile Accordion Hierarchy & Amber Highlights */
.mobile-nav-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-top: 1rem;
}

.mobile-nav-item {
    border-bottom: 1px solid rgba(15, 29, 47, 0.06);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.35rem 0;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-text-title);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.5rem 0.65rem;
    border-radius: var(--radius-sm);
    width: 100%;
    border-left: 3px solid transparent;
    transition: all var(--transition-fast);
}

/* Amber Highlight when hovered, tapped, or active */
.mobile-nav-link:hover,
.mobile-nav-link:active,
.mobile-nav-link.is-active,
.mobile-nav-item.is-active > .mobile-nav-header .mobile-nav-link {
    color: var(--color-accent) !important;
    background-color: rgba(230, 126, 34, 0.12) !important;
    border-left-color: var(--color-accent) !important;
    padding-left: 0.85rem !important;
    box-shadow: inset 0 0 10px rgba(230, 126, 34, 0.08);
}

.mobile-accordion-toggle {
    background: none;
    border: none;
    padding: 0.5rem 0.65rem;
    cursor: pointer;
    font-size: 0.75rem;
    color: var(--color-primary);
    transition: transform var(--transition-fast), color var(--transition-fast);
}

.mobile-accordion-toggle.is-expanded {
    transform: rotate(180deg);
    color: var(--color-accent) !important;
}

.mobile-accordion-panel {
    display: none;
    padding: 0.4rem 0.5rem 0.85rem 0.85rem;
    border-left: 2px solid var(--color-accent);
    background-color: rgba(230, 126, 34, 0.03);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 0.5rem;
}

.mobile-accordion-panel.is-open {
    display: block;
}

.mobile-sub-title {
    font-family: var(--font-heading);
    font-size: 0.825rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0.5rem 0 0.25rem 0;
    padding: 0.2rem 0.35rem;
    border-radius: 3px;
    transition: all var(--transition-fast);
}

.mobile-sub-title:hover,
.mobile-sub-title:active {
    color: var(--color-accent-hover);
    background-color: rgba(230, 126, 34, 0.1);
}

.mobile-product-link {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    padding: 0.25rem 0.4rem;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.mobile-product-link:hover,
.mobile-product-link:active {
    color: var(--color-accent) !important;
    background-color: rgba(230, 126, 34, 0.08);
    padding-left: 0.65rem;
}

/* =======================================================================
   5. Breakpoints & Responsive Display Modes
   ======================================================================= */
@media (max-width: 1024px) {
    .site-header {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        width: 100% !important;
        z-index: 1000 !important;
    }

    .main-navbar,
    .site-header.is-scrolled .main-navbar {
        height: 70px !important;
    }

    .header-topbar {
        display: none !important;
    }

    .navbar-nav {
        display: none !important;
    }

    .mobile-nav-toggle {
        display: block !important;
    }

    .mega-menu {
        display: none !important;
    }
}

/* Failsafe: Remove header backdrop-filter when mobile drawer is open */
.site-header:has(.mobile-drawer.is-active),
body:has(.mobile-drawer.is-active) .site-header {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
}