/* ==========================================================================
   NEXO FASHIONS - STICKY LUXURY NAVIGATION HEADER
   ========================================================================== */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: background-color var(--transition-smooth), 
                backdrop-filter var(--transition-smooth), 
                box-shadow var(--transition-smooth),
                padding var(--transition-smooth);
    padding: var(--space-md) 0;
}

/* Header scrolled state (Frosted Glassmorphism - Premium White Theme) */
.site-header.scrolled {
    background-color: rgba(255, 255, 255, 0.88); /* Translucent Premium White */
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    padding: 0.85rem 0;
}

/* Transparent State links */
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo styling - High-End Corporate Vector SVG */
.logo {
    display: flex;
    align-items: center;
}

.logo-img {
    height: 38px;
    width: auto;
    display: block;
    transition: opacity var(--transition-fast);
}

@media (max-width: 480px) {
    .logo-img {
        height: 28px; /* Scale down slightly on narrow mobile viewports to prevent overflow */
    }
}

/* By default, hide logo_dark, show logo_light (since header background is dark by default) */
.logo-dark {
    display: none !important;
}
.logo-light {
    display: block !important;
}

/* Scrolled state: background becomes light, so display logo_dark */
.site-header.scrolled .logo-dark {
    display: block !important;
}
.site-header.scrolled .logo-light {
    display: none !important;
}

/* ONLY when the header has .light-theme and is NOT scrolled (white background fallback), display logo_dark */
.site-header.light-theme:not(.scrolled) .logo-dark {
    display: block !important;
}
.site-header.light-theme:not(.scrolled) .logo-light {
    display: none !important;
}

/* For non-hero pages or light header mode fallback */
.site-header.light-theme {
    border-bottom: 1px solid var(--color-border);
}
.site-header.light-theme:not(.scrolled) {
    background-color: var(--color-bg-white);
}
.site-header.light-theme:not(.scrolled) .logo-text {
    color: var(--color-primary-dark);
}
.site-header.light-theme:not(.scrolled) .nav-link {
    color: var(--color-text-primary);
}

/* Desktop Navigation List */
.nav-menu {
    display: none;
    align-items: center;
    list-style: none;
    gap: var(--space-md);
}

@media (min-width: 1024px) {
    .nav-menu {
        display: flex;
    }
}

.nav-item {
    position: relative;
}

.nav-link {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.8);
    padding: 0.5rem 0.25rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-luxury-gold);
    transition: width var(--transition-smooth);
}

.nav-link:hover {
    color: var(--color-luxury-gold);
}

.nav-link:hover::after,
.nav-item.active .nav-link::after {
    width: 100%;
}

.nav-item.active .nav-link {
    color: var(--color-luxury-gold);
    font-weight: 600;
}

/* High contrast hover & active state overrides for transparent dark headers */
.site-header:not(.light-theme) .nav-link:hover,
.site-header:not(.light-theme) .nav-item.active .nav-link {
    color: #FFFFFF !important;
}

.site-header:not(.light-theme) .nav-link::after {
    background-color: #FFFFFF !important;
}

/* Scrolled state navigation links overrides (Dark slate links on light frosted glass) */
.site-header.scrolled .nav-link {
    color: var(--color-text-primary) !important;
}

.site-header.scrolled .nav-link:hover,
.site-header.scrolled .nav-item.active .nav-link {
    color: var(--color-primary-dark) !important;
}

.site-header.scrolled .nav-link::after {
    background-color: var(--color-premium-teal) !important;
}

/* Hamburger spans in scrolled state */
.site-header.scrolled .mobile-trigger span {
    background-color: var(--color-primary-dark) !important;
}

/* Header CTAs */
.header-actions {
    display: none;
    align-items: center;
    gap: var(--space-sm);
}

@media (min-width: 1024px) {
    .header-actions {
        display: flex;
    }
}

.header-btn {
    padding: 0.65rem 1.35rem;
    font-size: 0.75rem;
    border-radius: var(--border-radius-sm);
}

/* --- Mobile Menu Trigger --- */
.mobile-trigger {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    padding: 0;
    margin: 0;
    cursor: pointer;
    z-index: 1100;
    outline: none;
}

.mobile-trigger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-bg-white);
    transition: transform var(--transition-smooth), opacity var(--transition-smooth), background-color var(--transition-smooth);
    transform-origin: left center;
}

/* Scrolled state changes menu icon to match context if in light theme */
.site-header.light-theme:not(.scrolled) .mobile-trigger span {
    background-color: var(--color-primary-dark);
}

/* Open Animation */
.mobile-trigger.active span:nth-child(1) {
    transform: rotate(45deg) translate(-2px, -3px);
}
.mobile-trigger.active span:nth-child(2) {
    opacity: 0;
}
.mobile-trigger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(-2px, 3px);
}

@media (min-width: 1024px) {
    .mobile-trigger {
        display: none;
    }
}

/* --- Mobile Navigation Drawer --- */
.mobile-drawer {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    background-color: var(--color-primary-dark);
    z-index: 1050;
    padding: var(--space-xxl) var(--space-lg) var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    box-shadow: -10px 0 50px rgba(0,0,0,0.5);
    transition: right var(--transition-smooth);
}

.mobile-drawer.active {
    right: 0;
}

.mobile-nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.mobile-nav-link {
    font-family: var(--font-heading);
    font-size: 1.85rem;
    font-weight: 500;
    color: var(--color-bg-white);
    display: block;
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-nav-link:hover,
.mobile-nav-list .active .mobile-nav-link {
    color: #FFFFFF !important; /* Pure white high-contrast for visibility in dark drawer */
    padding-left: var(--space-xs);
    border-bottom-color: #FFFFFF;
}

.mobile-drawer-cta {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.mobile-drawer-btn {
    text-align: center;
    width: 100%;
}