/* ============================================
   NAVIGATION.CSS - Main Navigation Styles
   ============================================
   Table of Contents:
   1. Base Navbar Styles
   2. Logo/Brand
   3. Nav Links
   4. Mobile Toggle Button
   5. Search
   6. Mega Menu - Desktop
   7. Transparent Navbar
   8. Responsive - Tablet (992px)
   9. Responsive - Medium (768px)
   10. Responsive - Small (576px)
   ============================================ */

/* ============================================
   1. BASE NAVBAR STYLES
   ============================================ */
#mainNav {
    position: sticky !important;
    top: 0 !important;
    z-index: 1030;
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    padding: 0;
    min-height: 80px;
    transition: all var(--transition-normal);
}

#mainNav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 90px;
    padding-left: 0;
    padding-right: 1rem;
}

/* ============================================
   2. LOGO / BRAND
   ============================================ */
.navbar-brand {
    padding: 0;
    margin-right: auto;
}

.navbar-brand img {
    transition: height var(--transition-normal), filter var(--transition-normal);
}

.logo-full {
    height: 90px;
    width: auto;
    display: block;
}

.navbar.scrolled .logo-full {
    height: 80px;
}

/* ============================================
   3. NAV LINKS
   ============================================ */
.navbar-nav {
    align-items: center;
    gap: 0.5rem;
    margin-left: auto;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--primary-color) !important;
    font-weight: 500;
    font-size: 1.05rem;
    padding: 1.75rem 1rem !important;
    height: 90px;
    display: flex;
    align-items: center;
    position: relative;
    transition: color var(--transition-normal);
}

/* One-line labels on wide screens. Below 1200px the Bootstrap container is
   960px — too narrow for nowrap with five items, so labels may wrap there. */
@media (min-width: 1200px) {
    .nav-link {
        white-space: nowrap;
    }
}

@media (min-width: 1200px) and (max-width: 1399.98px) {
    .nav-link {
        font-size: 0.95rem;
        padding: 1.75rem 0.75rem !important;
    }
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background-color: var(--accent-color);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav-link:hover,
.nav-link:focus,
.nav-link.active {
    color: var(--primary-color-dark) !important;
}

.nav-link:hover::after,
.nav-link:focus::after,
.nav-link.active::after {
    width: 100%;
    background-color: var(--accent-color-dark);
}

/* Items that open a mega menu don't get the underline — the dropdown itself is
   the hover response. Spaceport (no dropdown) keeps it. */
.has-megamenu > .nav-link::after {
    display: none;
}

/* ============================================
   4. MOBILE TOGGLE BUTTON
   ============================================ */
.navbar-toggler {
    border: 2px solid var(--primary-color);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    transition: all var(--transition-normal);
    color: var(--primary-color);
    font-size: 1.25rem;
    display: none;
    order: 2;
}

.navbar-toggler:focus {
    box-shadow: none;
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.navbar-toggler:hover {
    background-color: var(--primary-color);
    color: var(--white);
}
#mainNav.nav-transparent .navbar-toggler:focus {
    outline-color: var(--white);
}

/* Off-canvas drawer header + backdrop are mobile-only (shown in the <=992 block). */
.nav-drawer-head { display: none; }
.nav-backdrop { display: none; }

/* ============================================
   5. SEARCH
   ============================================ */
.nav-search {
    position: relative;
    margin-left: 1rem;
    order: 3;
}

.nav-search-btn {
    background: transparent;
    border: none;
    color: var(--primary-color);
    font-size: 1.1rem;
    padding: 0.5rem;
    cursor: pointer;
    transition: color var(--transition-normal);
}

.nav-search-btn:hover {
    color: var(--primary-color-dark);
}

.nav-search-form {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    z-index: 1000;
}

.nav-search-form.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(5px);
}

.nav-search-form form {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-search-form input {
    border: 1px solid var(--light-gray);
    border-radius: 6px;
    padding: 0.6rem 1rem;
    font-size: 0.95rem;
    width: 250px;
    transition: border-color var(--transition-normal);
}

/* Same fix as .fb-search-input: the 10%-alpha shadow read as nothing on white,
   so focus now lands a solid ring (WCAG 2.4.7). */
.nav-search-form input:focus {
    border-color: var(--primary-color);
    outline: 3px solid var(--primary-color);
    outline-offset: 2px;
}

.nav-search-form button {
    background: var(--primary-color);
    border: none;
    color: var(--white);
    width: 38px;
    height: 38px;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color var(--transition-normal);
}

.nav-search-form button:hover {
    background: var(--accent-color);
}
/* ============================================
   SEARCH DROPDOWN
   ============================================ */
.nav-search-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    width: 320px;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    z-index: 1001;
    max-height: 400px;
    overflow-y: auto;
}

.nav-search-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(5px);
}

.nav-search-result {
    display: flex;
    flex-direction: column;
    padding: 0.75rem 1rem;
    text-decoration: none;
    border-bottom: 1px solid var(--light-gray);
    transition: background-color var(--transition-normal);
}

.nav-search-result:hover,
.nav-search-result.kb-active {
    background-color: var(--light-gray);
}

.nav-search-result-title {
    color: var(--primary-color);
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-search-result-title i {
    color: #c62828;
    margin-right: 0.35rem;
}

.nav-search-result-category {
    color: var(--mid-gray);
    font-size: 0.8rem;
    margin-top: 0.2rem;
}

.nav-search-view-all {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    color: var(--primary-color);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
}

.nav-search-view-all:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.nav-search-no-results {
    padding: 1rem;
    text-align: center;
    color: var(--mid-gray);
    font-size: 0.9rem;
}
/* ============================================
   6. MEGA MENU - DESKTOP
   ============================================ */
.has-megamenu {
    position: static;
}

.has-megamenu > .nav-link {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.dropdown-icon {
    font-size: 0.7rem;
    transition: transform var(--transition-normal);
}

.has-megamenu:hover .dropdown-icon,
.has-megamenu:focus-within .dropdown-icon {
    transform: rotate(180deg);
}

.mobile-dropdown-toggle {
    display: none;
}

/* Mega Menu Container */
.mega-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    border-top: 3px solid var(--accent-color);
}

.has-megamenu:hover .mega-menu,
.has-megamenu:focus-within .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Mega Menu Inner Layout */
.mega-menu-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    gap: 3rem;
}

.mega-menu-column {
    flex: 1;
    min-width: 180px;
}

/* Mega Menu Headers */
.mega-menu-header {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
    transition: color var(--transition-normal), border-color var(--transition-normal);
}

.mega-menu-header a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.mega-menu-header:hover,
.mega-menu-header a:hover {
    color: var(--primary-color-dark);
    border-bottom-color: var(--accent-color);
}

/* Mega Menu Links */
.mega-menu-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.mega-menu-column li {
    margin-bottom: 0.5rem;
}

.mega-menu-column a {
    color: var(--dark-gray);
    text-decoration: none;
    font-size: 0.95rem;
    padding: 0.4rem 0;
    display: block;
    transition: all var(--transition-normal);
    position: relative;
    padding-left: 0;
}

.mega-menu-column a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width var(--transition-normal);
}

.mega-menu-column a:hover {
    color: var(--primary-color-dark);
    padding-left: 1rem;
}

.mega-menu-column a:hover::before {
    width: 0.5rem;
}

/* Mega Menu Icons */
.mega-menu-column a .fa-arrow-up-right-from-square,
.mega-menu-column a .fa-file-pdf {
    margin-left: 0.3rem;
    opacity: 0.6;
}

/* ============================================
   7. TRANSPARENT NAVBAR (Hero Pages)
   ============================================ */
#mainNav.nav-transparent {
    background-color: transparent;
    box-shadow: none;
}

#mainNav.nav-transparent .nav-link {
    color: var(--white) !important;
}

#mainNav.nav-transparent .nav-link:hover {
    /* Over hero photos the background is unpredictable — white is the only color
       that reliably keeps AA contrast; the ::after underline signals hover. */
    color: var(--white) !important;
}

#mainNav.nav-transparent .navbar-toggler {
    border-color: var(--white);
    color: var(--white);
}

#mainNav.nav-transparent .navbar-toggler:hover {
    background-color: var(--white);
    color: var(--primary-color);
}

#mainNav.nav-transparent .nav-search-btn {
    color: var(--white);
}

#mainNav.nav-transparent .nav-search-btn:hover {
    /* Keep white over photos (see .nav-link:hover above); tint the background
       for hover feedback since this button has no underline. */
    color: var(--white);
    background-color: rgba(255, 255, 255, 0.18);
    border-radius: 4px;
}

#mainNav.nav-transparent .navbar-brand img {
    filter: brightness(0) invert(1);
}

/* ============================================
   8. RESPONSIVE - TABLET (991.98px)
   ============================================ */
@media (max-width: 991.98px) {
    /* Base Navbar */
    #mainNav {
        min-height: 70px;
    }

    #mainNav .container {
        flex-wrap: wrap;
        min-height: 70px;
        padding-left: 1rem;
    }

    /* Logo */
    .logo-full {
        height: 50px;
    }

    .navbar-brand {
        order: 1;
    }

    /* Toggle Button */
    .navbar-toggler {
        display: block;
        order: 4;
    }

    /* Search */
    .nav-search {
        order: 3;
        margin-left: auto;
        margin-right: 1rem;
    }

    /* Navbar Collapse -> off-canvas drawer (slides in from the right, scrolls inside) */
    .navbar-collapse {
        display: flex !important;
        flex-direction: column;
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        height: 100%;
        width: 86%;
        max-width: 360px;
        order: 0;
        margin: 0;
        padding: 0;
        background-color: var(--white);
        border-top: none;
        box-shadow: -8px 0 30px rgba(0, 0, 0, 0.2);
        transform: translateX(100%);
        transition: transform 0.28s ease;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        z-index: 1050;
    }

    .navbar-collapse.drawer-open {
        transform: none;
    }

    /* Drawer header (sticky within the scrolling panel) */
    .nav-drawer-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0.9rem 1rem;
        border-bottom: 1px solid var(--light-gray);
        position: sticky;
        top: 0;
        background: var(--white);
        z-index: 1;
        flex: none;
    }

    .nav-drawer-title {
        font-weight: 700;
        color: var(--primary-color);
        font-size: 1.05rem;
    }

    .nav-drawer-close {
        background: none;
        border: none;
        color: var(--primary-color);
        font-size: 1.6rem;
        line-height: 1;
        padding: 0.1rem 0.55rem;
        cursor: pointer;
        border-radius: 6px;
    }

    .nav-drawer-close:hover {
        background: var(--light-gray);
    }

    /* Dimmed backdrop behind the drawer.
       This must stay BELOW #mainNav, not below the drawer. The backdrop is a
       sibling of #mainNav, and #mainNav carries Bootstrap's .sticky-top
       (z-index 1020), which makes it a stacking context — so the drawer's own
       z-index:1050 is sealed inside it and cannot compete out here. A backdrop
       above 1020 therefore covers the drawer as well as the page, which reads
       as "the screen goes dark and nothing is clickable". Both sit inside
       #nav-placeholder (z-index 1030), so 1010 still dims all page content.
       Nothing else on the site occupies 1010-1020. */
    .nav-backdrop {
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(9, 20, 35, 0.5);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.25s ease, visibility 0.25s ease;
        z-index: 1010;
    }

    .nav-backdrop.open {
        opacity: 1;
        visibility: visible;
    }

    /* Lock page scroll while the drawer is open */
    body.nav-open {
        overflow: hidden;
    }

    .navbar-nav {
        gap: 0;
        align-items: stretch;
    }

    .nav-item {
        width: 100%;
    }

    /* Nav Links - Mobile */
    .nav-link {
        height: auto;
        padding: 1rem 1rem 1rem 1.5rem !important;
        border-bottom: 1px solid var(--light-gray);
        justify-content: flex-start;
    }

    .nav-link::after {
        bottom: 0;
        top: 0;
        left: 0;
        height: 100%;
        width: 0;
        transform: none;
    }

    .nav-link:hover::after,
    .nav-link:focus::after,
    .nav-link.active::after {
        width: 4px;
        background-color: var(--accent-color);
    }

    /* Mega Menu Items - Mobile */
    .has-megamenu {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
    }

    .has-megamenu > .nav-link {
        flex: 1;
    }

    .dropdown-icon {
        display: none;
    }

    /* Mobile Dropdown Toggle */
    .mobile-dropdown-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 50px;
        height: auto;
        background: transparent;
        border: none;
        border-left: 1px solid var(--light-gray);
        color: var(--primary-color);
        cursor: pointer;
        transition: all var(--transition-normal);
        padding: 1rem;
    }

    .mobile-dropdown-toggle:hover {
        background: var(--light-gray);
        color: var(--primary-color-dark);
    }

    .mobile-dropdown-toggle i {
        transition: transform var(--transition-normal);
    }

    .mobile-dropdown-toggle.active i {
        transform: rotate(45deg);
    }

    /* Mega Menu - Mobile */
    .mega-menu {
        position: static;
        width: 100%;
        box-shadow: none;
        border-top: none;
        border-left: 3px solid var(--accent-color);
        background: var(--off-white, #f8f9fa);
        transform: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, opacity 0.3s ease, padding 0.3s ease;
        padding: 0;
        opacity: 0;
    }

    .mega-menu.active {
        /* Generous cap so the tallest menu (About MAF) never clips; the drawer
           itself scrolls, so any overflow is still reachable. */
        max-height: 2200px;
        opacity: 1;
        visibility: visible;
        padding: 1rem 0;
    }

    .mega-menu-inner {
        flex-direction: column;
        gap: 1.5rem;
        padding: 1rem 1.5rem;
    }

    .mega-menu-column {
        min-width: 100%;
    }

    .mega-menu-header {
        font-size: 0.8rem;
        margin-bottom: 0.75rem;
    }

    .mega-menu-column a {
        padding: 0.5rem 0;
        font-size: 0.9rem;
    }

    /* Transparent Nav - Mobile Overrides */
    #mainNav.nav-transparent .navbar-collapse {
        background-color: var(--white);
    }

    #mainNav.nav-transparent .navbar-collapse .nav-link {
        color: var(--primary-color) !important;
    }

    #mainNav.nav-transparent .navbar-collapse .nav-link:hover {
        /* Drawer is on white: --accent-color here is 2.41:1, below WCAG AA 4.5:1 */
        color: var(--primary-color-dark) !important;
    }

    #mainNav.nav-transparent .mobile-dropdown-toggle {
        color: var(--primary-color);
    }
}
/* Fuzzy correction banner in dropdown */
.nav-search-correction {
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    color: #555;
    background-color: #f8f9fa;
    border-bottom: 1px solid var(--light-gray);
}

.nav-search-correction strong {
    color: var(--primary-color);
}

/* Popular searches in dropdown */
.nav-search-popular-label {
    padding: 0.5rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: #888;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.nav-search-popular-item .nav-search-result-title {
    font-weight: 400;
}

.nav-search-popular-item .fa-magnifying-glass {
    color: #aaa;
    margin-right: 0.4rem;
    font-size: 0.8rem;
}

.nav-search-no-results a {
    color: var(--primary-color);
    text-decoration: underline;
}
/* ============================================
   9. RESPONSIVE - MEDIUM (768px)
   ============================================ */
@media (max-width: 767.98px) {
    .nav-search-form input {
        width: 200px;
    }
}

/* ============================================
   10. RESPONSIVE - SMALL (576px)
   ============================================ */
@media (max-width: 575.98px) {
    .nav-search-dropdown {
        width: 100%;
        left: 0;
        right: 0;
        border-radius: 0;
    }
    #mainNav {
        min-height: 60px;
    }

    #mainNav .container {
        min-height: 60px;
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }
    .logo-full {
        height: 40px;
    }
    .nav-search-btn {
        font-size: 1rem;
    }

    .navbar-toggler {
        padding: 0.4rem 0.6rem;
        font-size: 1.1rem;
    }

    .nav-search-form {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        border-radius: 0;
        padding: 1rem;
    }

    .nav-search-form input {
        width: 100%;
        flex: 1;
    }
}