/* ========================================
   LCSU — Glassmorphism Navbar
   ======================================== */

.lcsu-navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), background 0.3s ease, box-shadow 0.3s ease;
}

.lcsu-navbar--hidden {
    transform: translateY(-100%);
}

.lcsu-navbar--scrolled {
    background: rgba(255, 255, 255, 0.88);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
}

.lcsu-navbar__inner {
    max-width: var(--lcsu-container);
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

/* ── Brand / Logo ──────────────────────── */
.lcsu-navbar__brand a,
.lcsu-navbar__logo-text {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    text-decoration: none;
    color: var(--lcsu-text);
}
.lcsu-navbar__site-name {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--lcsu-primary-dark), var(--lcsu-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Navigation Menu ───────────────────── */
.lcsu-navbar__nav {
    display: flex;
    align-items: center;
}
.lcsu-navbar__menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
    margin: 0;
    padding: 0;
}
.lcsu-navbar__menu li { position: relative; }
.lcsu-navbar__menu > li > a {
    display: flex;
    align-items: center;
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--lcsu-text-secondary);
    border-radius: var(--lcsu-radius);
    transition: all var(--lcsu-transition);
    text-decoration: none;
}
.lcsu-navbar__menu > li > a:hover,
.lcsu-navbar__menu > li.current-menu-item > a,
.lcsu-navbar__menu > li.current_page_item > a {
    color: var(--lcsu-primary-dark);
    background: var(--lcsu-primary-ultra);
}

/* Submenu */
.lcsu-navbar__menu .sub-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 200px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--lcsu-border);
    border-radius: var(--lcsu-radius);
    padding: 0.5rem;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s ease;
    box-shadow: var(--lcsu-shadow-md);
}
.lcsu-navbar__menu li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}
.lcsu-navbar__menu .sub-menu a {
    display: block;
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
    color: var(--lcsu-text-secondary);
    border-radius: 8px;
    transition: all var(--lcsu-transition);
}
.lcsu-navbar__menu .sub-menu a:hover {
    color: var(--lcsu-primary-dark);
    background: var(--lcsu-primary-ultra);
}

/* ── Actions ───────────────────────────── */
.lcsu-navbar__actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* ── Hamburger ─────────────────────────── */
.lcsu-navbar__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: background var(--lcsu-transition);
}
.lcsu-navbar__toggle:hover { background: var(--lcsu-surface); }
.lcsu-navbar__hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    width: 22px;
}
.lcsu-navbar__hamburger span {
    display: block;
    height: 2px;
    background: var(--lcsu-text);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}
.lcsu-navbar__toggle[aria-expanded="true"] .lcsu-navbar__hamburger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.lcsu-navbar__toggle[aria-expanded="true"] .lcsu-navbar__hamburger span:nth-child(2) {
    opacity: 0;
}
.lcsu-navbar__toggle[aria-expanded="true"] .lcsu-navbar__hamburger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Drawer ─────────────────────── */
.lcsu-navbar__drawer {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    transform: translateX(100%);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    overflow-y: auto;
    display: none;
}
.lcsu-navbar__drawer[aria-hidden="false"] {
    transform: translateX(0);
}
.lcsu-navbar__drawer-inner {
    padding: 2rem 1.5rem;
}
.lcsu-navbar__drawer-menu {
    list-style: none;
    padding: 0;
    margin: 0 0 2rem;
}
.lcsu-navbar__drawer-menu li {
    border-bottom: 1px solid var(--lcsu-border);
}
.lcsu-navbar__drawer-menu a {
    display: block;
    padding: 1rem 0;
    font-size: 1.0625rem;
    font-weight: 500;
    color: var(--lcsu-text);
    transition: color var(--lcsu-transition);
}
.lcsu-navbar__drawer-menu a:hover {
    color: var(--lcsu-primary-dark);
}
.lcsu-navbar__drawer-menu .sub-menu {
    list-style: none;
    padding: 0 0 0 1.25rem;
}
.lcsu-navbar__drawer-menu .sub-menu a {
    font-size: 0.9375rem;
    color: var(--lcsu-text-secondary);
}

/* ── Spacer ────────────────────────────── */
.lcsu-navbar__spacer { height: 72px; }