/**
 * Multi-Level Dropdown Menu Styles
 * LibraryHub CMS
 */

/* =================================
   MULTI-LEVEL DROPDOWN
   ================================= */

/* Level 1 Dropdown */
.navbar-nav .dropdown-menu {
    border: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    padding: 0.5rem 0;
    margin-top: 0.5rem;
    min-width: 220px;
}

/* Level 2 & 3 Submenu */
.dropdown-submenu {
    position: relative;
}

.dropdown-submenu .dropdown-menu {
    top: 0;
    left: 100%;
    margin-top: -0.5rem;
    margin-left: 0.125rem;
}

/* Show submenu on hover (desktop) */
@media (min-width: 992px) {
    .dropdown-submenu:hover > .dropdown-menu {
        display: block;
    }
    
    .navbar-nav .dropdown:hover > .dropdown-menu {
        display: block;
    }
}

/* Submenu toggle arrow */
.dropdown-submenu > .dropdown-toggle::after {
    transform: rotate(-90deg);
    float: right;
    margin-top: 0.5rem;
    transition: transform 0.2s ease;
}

.dropdown-submenu:hover > .dropdown-toggle::after {
    transform: rotate(-90deg) scale(1.1);
}

/* Dropdown items styling */
.dropdown-item {
    padding: 0.5rem 1.25rem;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown-item i {
    width: 20px;
    text-align: center;
    opacity: 0.7;
}

.dropdown-item:hover {
    background-color: var(--primary-color, #2C3E50);
    color: white;
    padding-left: 1.5rem;
}

.dropdown-item:hover i {
    opacity: 1;
}

/* Active dropdown item */
.dropdown-item.active,
.dropdown-item:active {
    background-color: var(--primary-color, #2C3E50);
    color: white;
}

/* Dropdown divider */
.dropdown-divider {
    margin: 0.5rem 0;
    opacity: 0.1;
}

/* Mobile dropdown behavior */
@media (max-width: 991px) {
    .dropdown-submenu .dropdown-menu {
        position: static;
        float: none;
        width: 100%;
        margin-left: 0;
        box-shadow: none;
        border-left: 2px solid var(--primary-color, #2C3E50);
        border-radius: 0;
    }
    
    .dropdown-submenu > .dropdown-toggle::after {
        float: right;
        transform: rotate(0deg);
    }
    
    .dropdown-item {
        padding-left: 2rem;
    }
    
    .dropdown-submenu .dropdown-item {
        padding-left: 3rem;
    }
    
    .dropdown-submenu .dropdown-submenu .dropdown-item {
        padding-left: 4rem;
    }
}

/* Smooth animations */
.dropdown-menu {
    animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Level indicators (optional visual cue) */
.dropdown-menu .dropdown-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: transparent;
    transition: background 0.2s ease;
}

.dropdown-menu .dropdown-item:hover::before {
    background: var(--accent-color, #E74C3C);
}

/* =================================
   LOGO CONTAINER STYLES
   ================================= */

.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    object-fit: contain;
    transition: transform 0.3s ease;
}

.navbar-brand:hover .logo-img {
    transform: scale(1.05);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-text strong {
    font-size: 1rem;
    color: var(--text-color, #2C3E50);
    font-weight: 600;
}

.logo-text small {
    font-size: 0.75rem;
    color: var(--text-color, #2C3E50);
    opacity: 0.7;
    margin-top: 2px;
}

/* Responsive logo */
@media (max-width: 768px) {
    .logo-container {
        gap: 8px;
    }
    
    .logo-text strong {
        font-size: 0.9rem;
    }
    
    .logo-text small {
        font-size: 0.7rem;
    }
}

/* =================================
   NAVIGATION ENHANCEMENTS
   ================================= */

/* Highlight active menu */
.nav-link.active {
    position: relative;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 2px;
    background: var(--accent-color, #E74C3C);
}

/* Dropdown badge for menu with children */
.dropdown > .nav-link::after {
    display: inline-block;
    margin-left: 0.3rem;
    vertical-align: middle;
    content: "";
    border-top: 0.3em solid;
    border-right: 0.3em solid transparent;
    border-bottom: 0;
    border-left: 0.3em solid transparent;
}

/* Mega menu support (optional for future) */
.dropdown-mega {
    position: static;
}

.dropdown-mega .dropdown-menu {
    width: 100%;
    left: 0;
    right: 0;
}

/* =================================
   ACCESSIBILITY IMPROVEMENTS
   ================================= */

.dropdown-item:focus {
    outline: 2px solid var(--accent-color, #E74C3C);
    outline-offset: -2px;
}

/* Keyboard navigation indicators */
.dropdown-menu .dropdown-item:focus-visible {
    background-color: var(--primary-color, #2C3E50);
    color: white;
}

/* Screen reader text */
.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;
}

/* =================================
   UTILITIES
   ================================= */

/* Menu icon spacing */
.nav-link i,
.dropdown-item i {
    margin-right: 0.5rem;
    transition: transform 0.2s ease;
}

.nav-link:hover i,
.dropdown-item:hover i {
    transform: translateX(2px);
}

/* Badge in menu items */
.menu-badge {
    font-size: 0.65rem;
    padding: 0.2rem 0.4rem;
    margin-left: 0.5rem;
    border-radius: 3px;
}

/* Smooth transitions for all interactive elements */
.dropdown-menu,
.dropdown-item,
.nav-link {
    transition: all 0.2s ease;
}