/* ============================================================
   NAMILYANGO COLLEGE — NAVIGATION STYLES
   Covers: grad-bar, desktop nav, mega-menu, dropdowns,
           search bar, mobile slide-menu, overlay
   ============================================================ */

/* ---------- CSS CUSTOM PROPERTIES (design tokens) ---------- */
:root {
    --nav-primary:      #00274c;
    --nav-gold:         #f2cb3f;
    --nav-gold-dark:    #d4a800;
    --nav-white:        #ffffff;
    --nav-text:         #1e293b;
    --nav-text-muted:   #64748b;
    --nav-height:       72px;
    --nav-height-sm:    60px;
    --nav-shadow:       0 2px 24px rgba(0,0,0,0.10);
    --nav-radius:       10px;
    --nav-transition:   all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    --z-nav:            1000;
    --z-mega:           1010;
    --z-mobile:         1100;
    --z-overlay:        1090;
}

/* ---------- RESET ---------- */
a { text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }

/* ---------- GRAD BAR ---------- */
.grad-bar {
    width: 100%;
    height: 4px;
    background: linear-gradient(-45deg, #ee7752, #e73c7e, #23a6d5, #23d5ab, #f2cb3f);
    background-size: 400% 400%;
    animation: gradbar 12s ease infinite;
    flex-shrink: 0;
}
@keyframes gradbar {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ---------- SITE HEADER ---------- */
#site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: var(--z-nav);
    background: var(--nav-white);
    box-shadow: var(--nav-shadow);
    transition: var(--nav-transition);
}

/* Transparent on homepage hero */
.homepage #site-header {
    background: rgba(0, 0, 0, 0.15);
    box-shadow: none;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.homepage #site-header.scrolled {
    background: var(--nav-white);
    box-shadow: var(--nav-shadow);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

/* Hide-on-scroll-down */
#site-header.nav-hidden {
    transform: translateY(-100%);
}

/* ---------- NAVBAR INNER ---------- */
.navbar-main {
    width: 100%;
    position: relative; /* anchor for mega menu */
}
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 2rem;
    height: var(--nav-height);
    transition: height 0.28s ease;
    position: relative; /* anchor for dropdowns */
}
#site-header.scrolled .nav-container {
    height: var(--nav-height-sm);
}

/* ---------- LOGO ---------- */
.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}
.nav-logo img {
    height: 52px;
    width: auto;
    transition: height 0.28s ease;
    object-fit: contain;
}
#site-header.scrolled .nav-logo img {
    height: 40px;
}
.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}
.logo-name {
    font-family: 'Raleway', sans-serif;
    font-size: 1rem;
    font-weight: 800;
    color: var(--nav-primary);
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: var(--nav-transition);
}
.logo-year {
    font-size: 0.68rem;
    color: var(--nav-text-muted);
    letter-spacing: 0.5px;
    transition: var(--nav-transition);
}

/* Transparent header — white text on logo */
.homepage #site-header:not(.scrolled) .logo-name,
.homepage #site-header:not(.scrolled) .logo-year {
    color: rgba(255,255,255,0.95);
}

/* ---------- DESKTOP NAV LINKS ---------- */
.nav-links {
    display: flex;
    align-items: center;
    gap: 0;
    flex: 1;
    justify-content: center;
    list-style: none;
    margin: 0;
    padding: 0 1rem;
}
.nav-item {
    position: relative;
}
.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.2px;
    color: var(--nav-primary);
    border-radius: 6px;
    transition: var(--nav-transition);
    white-space: nowrap;
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 1rem; right: 1rem;
    height: 2px;
    background: var(--nav-gold);
    border-radius: 2px;
    transform: scaleX(0);
    transition: transform 0.25s ease;
}
.nav-link i { font-size: 0.68rem; transition: transform 0.25s ease; margin-left: 2px; }
.nav-link:hover,
.nav-link.active {
    color: var(--nav-primary);
    background: rgba(0,39,76,0.06);
}
.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}
.nav-link.active { color: var(--nav-gold-dark); }
.nav-item:hover > .nav-link i { transform: rotate(180deg); }

/* Transparent state underline */
.homepage #site-header:not(.scrolled) .nav-link::after {
    background: var(--nav-gold);
}

/* Transparent state nav links */
.homepage #site-header:not(.scrolled) .nav-link {
    color: rgba(255,255,255,0.92);
}
.homepage #site-header:not(.scrolled) .nav-link:hover,
.homepage #site-header:not(.scrolled) .nav-link.active {
    background: rgba(255,255,255,0.12);
    color: var(--nav-white);
}

/* ---------- SIMPLE DROPDOWN ---------- */
.has-dropdown { position: relative; }
.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 230px;
    background: var(--nav-white);
    border-radius: var(--nav-radius);
    box-shadow: 0 8px 32px rgba(0,0,0,0.14);
    opacity: 0;
    visibility: hidden;
    transform: translateY(6px);
    transition: var(--nav-transition);
    z-index: var(--z-mega);
    border-top: 3px solid var(--nav-gold);
    overflow: hidden;
    /* invisible bridge so hover doesn't break mid-gap */
    padding-top: 6px;
    margin-top: -2px;
    list-style: none;
}
.has-dropdown:hover .nav-dropdown,
.has-dropdown:focus-within .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.7rem 1.1rem;
    font-size: 0.87rem;
    font-weight: 500;
    color: var(--nav-text);
    transition: background 0.2s ease;
    text-decoration: none;
}
.nav-dropdown-item i {
    width: 18px;
    color: var(--nav-gold-dark);
    font-size: 0.8rem;
}
.nav-dropdown-item:hover {
    background: #f1f5fb;
    color: var(--nav-primary);
    padding-left: 1.4rem;
}

/* ---------- MEGA MENU ---------- */
.has-mega { position: static; }
.mega-menu {
    position: absolute;
    /* anchored to .nav-container which has position:relative */
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    width: min(92vw, 900px);
    background: var(--nav-white);
    border-radius: var(--nav-radius);
    box-shadow: 0 16px 48px rgba(0,0,0,0.15);
    border-top: 3px solid var(--nav-gold);
    opacity: 0;
    visibility: hidden;
    transition: var(--nav-transition);
    z-index: var(--z-mega);
    display: grid;
    grid-template-columns: 1.4fr 1fr 1.1fr 1fr;
    overflow: hidden;
    /* bridge gap so hover doesn't break */
    margin-top: 2px;
}
.has-mega:hover .mega-menu,
.has-mega:focus-within .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.mega-col { padding: 1.5rem; }
.mega-col:first-child {
    background: #f8fafc;
    border-right: 1px solid #e8ecf0;
}
.mega-col-img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 10px;
}
.mega-col-desc {
    font-size: 0.78rem;
    color: var(--nav-text-muted);
    line-height: 1.6;
}
.mega-col h4 {
    font-family: 'Raleway', sans-serif;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--nav-gold-dark);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #e8ecf0;
}
.mega-col li { margin-bottom: 0.2rem; }
.mega-col a {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--nav-text);
    padding: 0.45rem 0.5rem;
    border-radius: 5px;
    transition: var(--nav-transition);
    font-weight: 500;
}
.mega-col a i {
    font-size: 0.7rem;
    color: var(--nav-gold-dark);
    width: 14px;
}
.mega-col a:hover {
    background: rgba(0,39,76,0.06);
    color: var(--nav-primary);
    padding-left: 0.85rem;
}

/* ---------- NAV ACTIONS (right side) ---------- */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex-shrink: 0;
}
.nav-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0.48rem 1.1rem;
    font-size: 0.82rem;
    font-weight: 700;
    border-radius: 50px;
    letter-spacing: 0.3px;
    transition: var(--nav-transition);
    white-space: nowrap;
    text-decoration: none;
}
.nav-action-btn.gold {
    background: var(--nav-gold);
    color: var(--nav-primary);
}
.nav-action-btn.gold:hover {
    background: var(--nav-gold-dark);
    color: var(--nav-white);
    transform: translateY(-1px);
}
.nav-action-btn.outline {
    border: 1.5px solid var(--nav-primary);
    color: var(--nav-primary);
}
.nav-action-btn.outline:hover {
    background: var(--nav-primary);
    color: var(--nav-white);
}
.nav-action-btn.elearning {
    background: #0f766e;
    color: #fff;
}
.nav-action-btn.elearning:hover {
    background: #0d9488;
    color: #fff;
    transform: translateY(-1px);
}

/* Transparent state action buttons */
.homepage #site-header:not(.scrolled) .nav-action-btn.gold {
    background: rgba(242,203,63,0.9);
}
.homepage #site-header:not(.scrolled) .nav-action-btn.outline {
    border-color: rgba(255,255,255,0.7);
    color: var(--nav-white);
}
.homepage #site-header:not(.scrolled) .nav-action-btn.outline:hover {
    background: rgba(255,255,255,0.15);
}

.search-toggle,
.hamburger {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.45rem 0.55rem;
    border-radius: 6px;
    color: var(--nav-primary);
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--nav-transition);
}
.search-toggle:hover,
.hamburger:hover {
    background: rgba(0,39,76,0.08);
    color: var(--nav-primary);
}
.homepage #site-header:not(.scrolled) .search-toggle,
.homepage #site-header:not(.scrolled) .hamburger {
    color: var(--nav-white);
}
.homepage #site-header:not(.scrolled) .search-toggle:hover,
.homepage #site-header:not(.scrolled) .hamburger:hover {
    background: rgba(255,255,255,0.15);
}

/* Hamburger icon bars */
.hamburger { flex-direction: column; gap: 5px; width: 38px; height: 38px; }
.hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: var(--nav-transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- SEARCH BAR ---------- */
.search-bar {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    background: var(--nav-primary);
}
.search-bar.active {
    max-height: 80px;
}
.search-bar form {
    display: flex;
    align-items: center;
    max-width: 700px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    gap: 0.5rem;
}
.search-bar input {
    flex: 1;
    padding: 0.6rem 1rem;
    border: none;
    border-radius: 50px 0 0 50px;
    font-size: 0.95rem;
    outline: none;
    background: rgba(255,255,255,0.12);
    color: var(--nav-white);
}
.search-bar input::placeholder { color: rgba(255,255,255,0.5); }
.search-bar button {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 0 50px 50px 0;
    background: var(--nav-gold);
    color: var(--nav-primary);
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s ease;
}
.search-bar button:hover { background: var(--nav-gold-dark); color: var(--nav-white); }

/* ---------- OVERLAY ---------- */
#mobileOverlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.55);
    z-index: var(--z-overlay);
    opacity: 0;
    visibility: hidden;
    transition: var(--nav-transition);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
}
#mobileOverlay.active {
    opacity: 1;
    visibility: visible;
}

/* ---------- MOBILE MENU ---------- */
#mobileNav {
    position: fixed;
    top: 0; left: -320px;
    width: 300px;
    height: 100vh;
    background: var(--nav-primary);
    z-index: var(--z-mobile);
    overflow-y: auto;
    transition: left 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}
#mobileNav.open { left: 0; }

/* Scrollbar for mobile menu */
#mobileNav::-webkit-scrollbar { width: 4px; }
#mobileNav::-webkit-scrollbar-track { background: rgba(255,255,255,0.05); }
#mobileNav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 4px; }

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.2rem;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    background: rgba(0,0,0,0.2);
    flex-shrink: 0;
}
.mobile-nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}
.mobile-nav-logo img { height: 38px; width: auto; }
.mobile-logo-text { display: flex; flex-direction: column; }
.mobile-logo-name {
    font-family: 'Raleway', sans-serif;
    font-size: 0.82rem;
    font-weight: 800;
    color: var(--nav-white);
    letter-spacing: 0.5px;
}
.mobile-logo-year { font-size: 0.65rem; color: rgba(255,255,255,0.55); }

.mobile-close-btn {
    background: rgba(255,255,255,0.1);
    border: none;
    color: var(--nav-white);
    width: 34px; height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.2s ease;
}
.mobile-close-btn:hover { background: rgba(255,255,255,0.2); }

.mobile-nav-body { padding: 0.75rem 0 2rem; flex: 1; }

/* Mobile Nav Links */
.mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.75rem 1.4rem;
    color: rgba(255,255,255,0.88);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    transition: var(--nav-transition);
    text-decoration: none;
}
.mobile-nav-link i { width: 18px; color: var(--nav-gold); font-size: 0.85rem; }
.mobile-nav-link:hover,
.mobile-nav-link.active {
    background: rgba(255,255,255,0.08);
    color: var(--nav-white);
    padding-left: 1.8rem;
}

/* Mobile Accordion Button */
.mobile-accordion-btn {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0.75rem 1.4rem;
    background: none;
    border: none;
    color: rgba(255,255,255,0.88);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.3px;
    cursor: pointer;
    transition: var(--nav-transition);
    text-align: left;
}
.mobile-accordion-btn:hover { background: rgba(255,255,255,0.08); color: var(--nav-white); }
.mobile-accordion-left { display: flex; align-items: center; gap: 12px; }
.mobile-accordion-left i { width: 18px; color: var(--nav-gold); font-size: 0.85rem; }
.mobile-accordion-arrow { font-size: 0.75rem; transition: transform 0.3s ease; color: rgba(255,255,255,0.5); }
.mobile-accordion-btn.open .mobile-accordion-arrow { transform: rotate(180deg); }

/* Mobile Accordion Panel */
.mobile-accordion-panel {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(0,0,0,0.15);
}
.mobile-accordion-panel.open { max-height: 600px; }

.mobile-panel-group { padding: 0.5rem 0 0.25rem; }
.mobile-panel-group-title {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--nav-gold);
    padding: 0.5rem 1.8rem 0.3rem;
}
.mobile-panel-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.55rem 1.8rem 0.55rem 2rem;
    font-size: 0.83rem;
    color: rgba(255,255,255,0.75);
    transition: var(--nav-transition);
    text-decoration: none;
}
.mobile-panel-link i { font-size: 0.72rem; color: rgba(255,255,255,0.4); width: 14px; }
.mobile-panel-link:hover {
    color: var(--nav-white);
    background: rgba(255,255,255,0.05);
    padding-left: 2.4rem;
}

/* Mobile Divider */
.mobile-divider {
    height: 1px;
    background: rgba(255,255,255,0.1);
    margin: 0.5rem 1.4rem;
}

/* Mobile Quick Links (Events, News, etc.) */
.mobile-quick-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    padding: 0.75rem 1.4rem;
}
.mobile-quick-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 0.75rem 0.5rem;
    background: rgba(255,255,255,0.07);
    border-radius: 8px;
    color: rgba(255,255,255,0.85);
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--nav-transition);
    text-align: center;
}
.mobile-quick-link i { font-size: 1rem; color: var(--nav-gold); }
.mobile-quick-link:hover { background: rgba(255,255,255,0.15); color: var(--nav-white); }

/* Mobile campus preview image */
.mobile-campus-preview {
    margin: 0.75rem 1.4rem 0;
    border-radius: 8px;
    overflow: hidden;
}
.mobile-campus-preview img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    display: block;
}
.mobile-campus-caption {
    font-size: 0.73rem;
    color: rgba(255,255,255,0.5);
    padding: 0.5rem 1.4rem 0;
    line-height: 1.5;
}

/* ---------- RESPONSIVE — hide desktop, show mobile ---------- */
@media (max-width: 1024px) {
    .nav-links      { display: none; }
    .hamburger      { display: flex; }
    .nav-action-btn { display: none; }
    .search-toggle  { display: flex; }
}
@media (min-width: 1025px) {
    .hamburger { display: none; }
}
@media (max-width: 480px) {
    .logo-text    { display: none; }
    .nav-logo img { height: 44px; }
}