/* ============================================
   MEGA MENU NAVIGATION COMPONENT
   Advenno Website - Phase 2
   ============================================ */

/* ============================================
   1. HEADER BASE & SCROLL EFFECTS
   ============================================ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-lg) 0;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.site-header.scrolled {
    background: rgba(11, 15, 26, 0.95);
    backdrop-filter: blur(30px);
    box-shadow: var(--shadow-md);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    gap: var(--space-2xl);
}

/* ============================================
   2. LOGO
   ============================================ */

.logo {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.logo img {
    height: 40px;
    width: auto;
}

/* ============================================
   3. MAIN NAVIGATION
   ============================================ */

.main-nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-2xl);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    text-decoration: none;
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

/* ============================================
   NEW: NAV LINK CONTAINER & SUBMENU ARROW
   ============================================ */

.nav-link-container {
    display: flex;
    align-items: center;
    gap: 2px;
}

.submenu-arrow {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.submenu-arrow:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.chevron {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-normal);
}

.nav-item.active .chevron {
    transform: rotate(180deg);
}

@media (max-width: 768px) {
    .nav-link-container {
        justify-content: space-between;
        width: 100%;
        padding: var(--space-sm) 0;
    }

    .submenu-arrow {
        padding: 12px;
        background: rgba(255, 255, 255, 0.03);
    }
}

.nav-link.active {
    color: var(--accent-cyan);
    position: relative;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: var(--space-md);
    right: var(--space-md);
    height: 2px;
    background: var(--gradient-accent);
}

/* Chevron Icon */
.chevron {
    width: 12px;
    height: 12px;
    transition: transform var(--transition-normal);
}

.nav-item.active .chevron {
    transform: rotate(180deg);
}

/* ============================================
   4. MEGA MENU CONTAINER
   ============================================ */

.mega-menu {
    position: absolute;
    top: calc(100% + 1rem);
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    width: max-content;
    min-width: 800px;
    max-width: 1100px;
    background: var(--bg-glass);
    backdrop-filter: blur(30px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 0.2s ease;
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

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

.mega-menu-inner {
    display: grid;
    grid-template-columns: 1fr 1fr 0.8fr;
    gap: var(--space-2xl);
}

/* ============================================
   5. MEGA MENU COLUMNS
   ============================================ */

.mega-col {
    display: flex;
    flex-direction: column;
}

.mega-heading {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
}

/* ============================================
   6. MEGA MENU LINKS
   ============================================ */

.mega-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mega-links li a {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.mega-links li a:hover {
    background: rgba(34, 211, 238, 0.1);
    color: var(--text-primary);
    transform: translateX(4px);
}

.mega-icon {
    font-size: 1.5rem;
    min-width: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mega-link-title {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.mega-link-desc {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* View All Link */
.mega-view-all {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-color);
}

.mega-view-all a {
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.9rem;
}

.mega-view-all a:hover {
    background: transparent;
    transform: translateX(0);
    color: var(--accent-blue);
}

/* For simpler links without icons */
.mega-links.needs-list li a {
    gap: var(--space-sm);
}

/* ============================================
   7. FEATURED CARD
   ============================================ */

.mega-featured {
    position: relative;
}

.mega-featured-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
}

.mega-featured-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
}

.mega-featured-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(34, 211, 238, 0.15);
    border: 1px solid rgba(34, 211, 238, 0.3);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-cyan);
    margin-bottom: var(--space-md);
}

.mega-featured-card h4 {
    font-size: 1.1rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.mega-featured-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.mega-featured-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.mega-featured-link:hover {
    color: var(--accent-blue);
    gap: 10px;
}

.mega-cta {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background: rgba(59, 130, 246, 0.05);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: var(--radius-md);
    text-align: center;
}

.mega-cta p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

/* ============================================
   8. SIMPLE DROPDOWN
   ============================================ */

.dropdown {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    min-width: 200px;
    background: var(--bg-glass);
    backdrop-filter: blur(30px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-10px);
    transition: all 0.2s ease;
    box-shadow: var(--shadow-md);
    z-index: 100;
}

.nav-item.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: all;
    transform: translateY(0);
}

.dropdown li a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.dropdown li a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

/* ============================================
   9. HEADER CTA & ACTIONS
   ============================================ */

.header-cta {
    flex-shrink: 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn-accent {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

/* ============================================
   10. MOBILE MENU TOGGLE
   ============================================ */

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    margin-left: var(--space-md);
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
    border-radius: 2px;
}

.mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translateY(7px);
}

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

.mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-7px);
}

/* ============================================
   11. MOBILE RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
    .nav-list {
        gap: var(--space-lg);
    }

    .mega-menu {
        min-width: 700px;
    }

    .mega-menu-inner {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }

    .mega-featured {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 var(--space-lg);
    }

    .mobile-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        max-width: 400px;
        height: 100vh;
        background: var(--bg-primary);
        backdrop-filter: blur(30px);
        border-left: 1px solid var(--border-color);
        padding: var(--space-3xl) var(--space-xl);
        transition: right 0.3s ease;
        overflow-y: auto;
        z-index: 1001;
    }

    .main-nav.active {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        width: 100%;
    }

    .nav-item {
        width: 100%;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-link {
        width: 100%;
        padding: var(--space-lg);
        justify-content: space-between;
    }

    /* Mobile Mega Menu - Accordion Style */
    .mega-menu {
        position: static;
        transform: none;
        width: 100%;
        min-width: auto;
        max-width: none;
        margin: 0;
        padding: 0;
        background: transparent;
        backdrop-filter: none;
        border: none;
        border-radius: 0;
        box-shadow: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-item.active .mega-menu {
        max-height: 1000px;
        opacity: 1;
        visibility: visible;
        pointer-events: all;
    }

    .mega-menu-inner {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
        padding: var(--space-lg);
        background: rgba(255, 255, 255, 0.02);
    }

    .mega-col {
        border-bottom: 1px solid var(--border-color);
        padding-bottom: var(--space-lg);
    }

    .mega-col:last-child {
        border-bottom: none;
    }

    .mega-links li a {
        padding: var(--space-sm) var(--space-md);
    }

    .mega-featured-card {
        padding: var(--space-lg);
    }

    /* Mobile Simple Dropdown */
    .dropdown {
        position: static;
        transform: none;
        width: 100%;
        margin: 0;
        padding: 0;
        background: transparent;
        backdrop-filter: none;
        border: none;
        box-shadow: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-item.has-dropdown.active .dropdown {
        max-height: 500px;
        opacity: 1;
        visibility: visible;
        pointer-events: all;
    }

    .dropdown li a {
        padding: var(--space-md) var(--space-xl);
        background: rgba(255, 255, 255, 0.02);
    }

    .header-cta {
        display: none;
    }

    /* Mobile Menu Overlay */
    .mobile-nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.7);
        backdrop-filter: blur(5px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: all 0.3s ease;
        z-index: 999;
    }

    .mobile-nav-overlay.active {
        opacity: 1;
        visibility: visible;
        pointer-events: all;
    }
}

@media (max-width: 480px) {
    .main-nav {
        max-width: 100%;
        padding: var(--space-2xl) var(--space-lg);
    }

    .logo {
        font-size: 1.5rem;
    }
}

/* ============================================
   12. ACCESSIBILITY
   ============================================ */

/* Focus States */
.nav-link:focus-visible,
.mega-links li a:focus-visible,
.dropdown li a:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
}

.mobile-toggle:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 4px;
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}