/* ==========================================
   Do it! khmer365 - Navigation CSS
   Mega Menu + Mobile Slide Menu
   ========================================== */

/* --- Navbar Base --- */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    box-shadow: 0 1px 12px rgba(0,0,0,0.06);
    transition: var(--transition);
}
.navbar.scrolled {
    box-shadow: var(--shadow-md);
}
.nav-container {
    max-width: 1280px; margin: 0 auto; padding: 0 1.5rem;
    display: flex; align-items: center; justify-content: space-between;
    height: 64px;
}

/* --- Home Icon Logo --- */
.nav-home-logo {
    display: flex; align-items: center; gap: 0.6rem;
    text-decoration: none; flex-shrink: 0;
}
.nav-home-icon {
    width: 38px; height: 38px; border-radius: 10px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex; align-items: center; justify-content: center;
    color: white; font-size: 1rem;
    box-shadow: 0 2px 8px rgba(27,75,138,0.25);
    transition: var(--transition);
}
.nav-home-logo:hover .nav-home-icon {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(27,75,138,0.35);
}
.nav-brand {
    display: flex; align-items: baseline; gap: 4px;
}
.nav-brand .logo-do { font-size: 0.95rem; font-weight: 800; color: var(--secondary); }
.nav-brand .logo-khmer { font-size: 1.1rem; font-weight: 700; color: var(--primary-dark); }

/* ==========================================
   MEGA MENU (Desktop)
   ========================================== */
.mega-menu {
    display: flex; list-style: none; gap: 0; align-items: center;
    margin: 0; padding: 0; height: 100%;
}
.mega-item {
    position: relative; height: 100%;
    display: flex; align-items: center;
}
.mega-link {
    display: flex; align-items: center; gap: 0.4rem;
    padding: 0 0.85rem; height: 100%;
    font-size: 0.88rem; font-weight: 500;
    color: var(--text-medium);
    text-decoration: none; transition: var(--transition);
    position: relative; white-space: nowrap;
}
.mega-link i { font-size: 0.82rem; color: var(--text-light); transition: var(--transition); }
.mega-link:hover,
.mega-item.active .mega-link {
    color: var(--primary);
}
.mega-link:hover i,
.mega-item.active .mega-link i {
    color: var(--primary);
}
.mega-item.active .mega-link::after {
    content: ''; position: absolute; bottom: 0; left: 0.85rem; right: 0.85rem;
    height: 3px; background: var(--secondary); border-radius: 3px 3px 0 0;
}

/* --- Mega Dropdown --- */
.mega-dropdown {
    position: absolute; top: 100%; left: 50%;
    transform: translateX(-50%);
    opacity: 0; visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease, transform 0.25s ease;
    transform: translateX(-50%) translateY(8px);
    z-index: 100;
    padding-top: 4px;
}
.mega-item:hover .mega-dropdown {
    opacity: 1; visibility: visible;
    transform: translateX(-50%) translateY(0);
}
.mega-dropdown-inner {
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: 0 12px 40px rgba(27,75,138,0.15);
    padding: 0.75rem;
    min-width: 280px;
}
.mega-col {
    display: flex; flex-direction: column; gap: 0.25rem;
}
.mega-sub-link {
    display: flex; align-items: center; gap: 0.85rem;
    padding: 0.7rem 0.85rem;
    border-radius: var(--radius-sm);
    text-decoration: none; transition: var(--transition);
}
.mega-sub-link:hover {
    background: var(--bg-blue);
}
.mega-sub-link i {
    width: 36px; height: 36px; border-radius: 8px;
    background: var(--bg-blue); color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.88rem; flex-shrink: 0;
    transition: var(--transition);
}
.mega-sub-link:hover i {
    background: var(--primary); color: white;
}
.mega-sub-link strong {
    display: block; font-size: 0.85rem; font-weight: 600;
    color: var(--text-dark); margin-bottom: 0.1rem;
}
.mega-sub-link p {
    font-size: 0.75rem; color: var(--text-light); margin: 0;
}

/* ==========================================
   NAV ACTIONS (Lang + Login + Hamburger)
   ========================================== */
.nav-actions {
    display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0;
}
.lang-switch {
    display: flex; gap: 0;
    background: var(--bg-light); border-radius: 6px;
    padding: 2px; border: 1px solid var(--border-light);
}
.lang-btn {
    padding: 0.3rem 0.55rem; border: none; background: transparent;
    font-size: 0.72rem; font-weight: 600; color: var(--text-light);
    cursor: pointer; border-radius: 4px; transition: var(--transition);
    font-family: inherit;
}
.lang-btn.active {
    background: white; color: var(--primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.lang-btn:hover:not(.active) { color: var(--text-medium); }

.nav-login-btn {
    display: flex; align-items: center; gap: 0.4rem;
    padding: 0.45rem 1rem; border-radius: var(--radius-sm);
    background: var(--primary); color: white;
    font-size: 0.82rem; font-weight: 500;
    text-decoration: none; transition: var(--transition);
}
.nav-login-btn:hover {
    background: var(--primary-light); transform: translateY(-1px);
}
.nav-login-btn i { font-size: 0.92rem; }

/* --- Hamburger (mobile only) --- */
.hamburger {
    display: none; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer;
    padding: 6px; width: 36px; height: 36px;
    justify-content: center; align-items: center;
}
.hamburger span {
    display: block; width: 22px; height: 2px;
    background: var(--text-dark); border-radius: 2px;
    transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ==========================================
   MOBILE SLIDE MENU
   ========================================== */
.mobile-menu-overlay {
    display: none; position: fixed; inset: 0;
    background: rgba(0,0,0,0.4); z-index: 1500;
    opacity: 0; transition: opacity 0.3s ease;
}
.mobile-menu-overlay.active {
    display: block; opacity: 1;
}

.mobile-menu {
    position: fixed; top: 0; right: -100%; width: 85%; max-width: 360px;
    height: 100vh; background: white; z-index: 1600;
    display: flex; flex-direction: column;
    transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: -8px 0 30px rgba(0,0,0,0.15);
    overflow: hidden;
}
.mobile-menu.active {
    right: 0;
}

.mobile-menu-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 1rem 1.2rem; border-bottom: 1px solid var(--border-light);
    flex-shrink: 0;
}
.mobile-close {
    background: none; border: none; font-size: 1.3rem;
    color: var(--text-light); cursor: pointer;
    padding: 0.3rem; transition: var(--transition);
}
.mobile-close:hover { color: var(--text-dark); }

.mobile-menu-body {
    flex: 1; overflow-y: auto; padding: 0.5rem 0;
    -webkit-overflow-scrolling: touch;
}

/* --- Mobile Accordion Groups --- */
.mobile-menu-group {
    border-bottom: 1px solid var(--bg-light);
}
.mobile-group-toggle {
    display: flex; align-items: center; justify-content: space-between;
    width: 100%; padding: 0.85rem 1.2rem;
    background: none; border: none; cursor: pointer;
    font-family: inherit; font-size: 0.92rem; font-weight: 600;
    color: var(--text-dark); transition: var(--transition);
}
.mobile-group-toggle span {
    display: flex; align-items: center; gap: 0.6rem;
}
.mobile-group-toggle span i { 
    color: var(--primary); font-size: 0.92rem; width: 20px; text-align: center;
}
.mobile-group-toggle .toggle-arrow {
    font-size: 0.72rem; color: var(--text-light);
    transition: transform 0.3s ease;
}
.mobile-group-toggle.active { color: var(--primary); background: var(--bg-blue); }
.mobile-group-toggle.active .toggle-arrow { transform: rotate(180deg); }
.mobile-group-toggle:hover { background: var(--bg-light); }

.mobile-group-sub {
    max-height: 0; overflow: hidden;
    transition: max-height 0.3s ease;
    background: var(--bg-light);
}
.mobile-group-sub.open {
    max-height: 250px;
}
.mobile-group-sub a {
    display: flex; align-items: center; gap: 0.5rem;
    padding: 0.65rem 1.2rem 0.65rem 2.8rem;
    font-size: 0.85rem; color: var(--text-medium);
    text-decoration: none; transition: var(--transition);
}
.mobile-group-sub a i { font-size: 0.78rem; color: var(--text-light); width: 18px; text-align: center; }
.mobile-group-sub a:hover { color: var(--primary); background: var(--bg-blue); }

/* Mobile Footer */
.mobile-menu-footer {
    padding: 1rem 1.2rem; border-top: 1px solid var(--border-light);
    flex-shrink: 0;
}
.mobile-lang {
    display: flex; gap: 0.4rem; margin-bottom: 0.75rem;
}
.mobile-lang-btn {
    flex: 1; padding: 0.5rem; border: 1.5px solid var(--border-light);
    background: white; border-radius: 6px;
    font-size: 0.78rem; font-weight: 600; color: var(--text-light);
    cursor: pointer; font-family: inherit; transition: var(--transition);
}
.mobile-lang-btn.active {
    background: var(--primary); color: white; border-color: var(--primary);
}
.mobile-login-btn {
    display: flex; align-items: center; justify-content: center; gap: 0.5rem;
    width: 100%; padding: 0.75rem;
    background: var(--primary); color: white;
    border-radius: var(--radius-sm);
    font-size: 0.88rem; font-weight: 600;
    text-decoration: none; transition: var(--transition);
}
.mobile-login-btn:hover { background: var(--primary-light); }

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 1024px) {
    .mega-link { padding: 0 0.55rem; font-size: 0.82rem; }
    .mega-link i { display: none; }
    .lang-switch { display: none; }
}

@media (max-width: 768px) {
    .nav-container { height: 58px; padding: 0 1rem; }
    .mega-menu { display: none; }
    .lang-switch { display: none; }
    .nav-login-btn { display: none; }
    .hamburger { display: flex; }
    .nav-brand .logo-do { font-size: 0.85rem; }
    .nav-brand .logo-khmer { font-size: 0.95rem; }
    .nav-home-icon { width: 34px; height: 34px; font-size: 0.88rem; }
}

@media (max-width: 480px) {
    .nav-container { padding: 0 0.75rem; height: 54px; }
    .nav-home-icon { width: 32px; height: 32px; font-size: 0.82rem; border-radius: 8px; }
    .nav-brand .logo-do { font-size: 0.78rem; }
    .nav-brand .logo-khmer { font-size: 0.88rem; }
}