/**
 * Navigation Component Styles
 * Academic Legal Website
 * 
 * Desktop and mobile navigation with hamburger menu
 */

/* ============================================================================
   DESKTOP NAVIGATION
   ========================================================================= */

.main-navigation {
    display: none; /* Hidden on mobile */
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    display: block;
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-medium);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
    background-color: var(--light-bg);
}

.nav-link.active {
    color: var(--primary);
    background-color: var(--light-bg);
    font-weight: var(--font-semibold);
}

.nav-link:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

/* Show navigation on desktop */
@media (min-width: 1024px) {
    .main-navigation {
        display: block;
    }
}
/* ============================================================================
   MOBILE MENU TOGGLE BUTTON
   ========================================================================= */

.menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.menu-toggle:hover {
    background-color: var(--light-bg);
}

.menu-toggle:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

/* Hamburger icon bars */
.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--secondary);
    margin: 3px 0;
    transition: all var(--transition-fast);
    border-radius: 2px;
}

/* Animated hamburger → X transformation */
.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Hide mobile toggle on desktop */
@media (min-width: 1024px) {
    .menu-toggle {
        display: none;
    }
}

/* ============================================================================
   MOBILE NAVIGATION OVERLAY
   ========================================================================= */

.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-normal), visibility var(--transition-normal);
    backdrop-filter: blur(4px);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ============================================================================
   MOBILE NAVIGATION PANEL
   ========================================================================= */

.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 320px;
    height: 100%;
    background: var(--white);
    z-index: var(--z-modal);
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    transition: right var(--transition-normal) ease-out;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
}

.mobile-nav.active {
    right: 0;
}

/* Hide mobile nav on desktop */
@media (min-width: 1024px) {
    .mobile-nav,
    .mobile-overlay {
        display: none;
    }
}

/* ============================================================================
   MOBILE NAV HEADER
   ========================================================================= */

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.mobile-nav-header .logo-text {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: var(--font-bold);
    color: var(--primary);
}

.mobile-nav-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-medium);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-nav-close:hover {
    background-color: var(--light-bg);
    color: var(--text-dark);
}

.mobile-nav-close svg {
    width: 24px;
    height: 24px;
}

/* ============================================================================
   MOBILE NAV LINKS
   ========================================================================= */

.mobile-nav-list {
    list-style: none;
    margin: 0;
    padding: var(--space-md) 0;
}

.mobile-nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    color: var(--text-dark);
    text-decoration: none;
    transition: all var(--transition-fast);
    border-left: 3px solid transparent;
}

.mobile-nav-link:hover {
    background-color: var(--light-bg);
    border-left-color: var(--accent);
}

.mobile-nav-link.active {
    color: var(--primary);
    background-color: var(--light-bg);
    border-left-color: var(--primary);
    font-weight: var(--font-semibold);
}

.mobile-nav-link svg {
    width: 20px;
    height: 20px;
    color: var(--text-light);
    flex-shrink: 0;
}

/* ============================================================================
   ACCESSIBILITY - PREVENT BODY SCROLL WHEN MENU OPEN
   ========================================================================= */

body.mobile-nav-open {
    overflow: hidden;
}

/* ============================================================================
   DROPDOWN NAVIGATION
   ========================================================================= */

.nav-dropdown {
    position: relative;
}

.nav-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
}

.dropdown-arrow {
    transition: transform 0.2s ease;
    width: 12px;
    height: 12px;
}

.nav-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 300px;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s ease;
    z-index: var(--z-dropdown, 100);
    padding: var(--space-sm) 0;
    list-style: none;
    margin: 0;
    margin-top: var(--space-xs);
}

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

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    color: var(--text-dark);
    text-decoration: none;
    transition: background 0.15s ease;
}

.dropdown-item:hover {
    background: var(--light-bg);
}

.dropdown-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.dropdown-text {
    display: flex;
    flex-direction: column;
}

.dropdown-text strong {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--text-dark);
}

.dropdown-text small {
    font-size: var(--text-xs);
    color: var(--text-light);
    margin-top: 2px;
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--space-sm) 0;
}

.dropdown-item-all {
    color: var(--primary);
    font-weight: var(--font-medium);
}

.dropdown-item-all:hover {
    color: var(--primary-dark);
}

/* ============================================================================
   HEADER SEARCH
   ========================================================================= */

.header-search {
    display: none; /* Hidden on mobile */
    align-items: center;
    margin-right: var(--space-md);
}

.header-search-input {
    width: 160px;
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    font-size: var(--text-sm);
    transition: width 0.2s ease, border-color 0.2s ease;
    background: var(--white);
    color: var(--text-dark);
}

.header-search-input::placeholder {
    color: var(--text-light);
}

.header-search-input:focus {
    width: 200px;
    border-color: var(--primary);
    outline: none;
}

.header-search-btn {
    padding: var(--space-xs) var(--space-sm);
    background: var(--primary);
    color: white;
    border: 1px solid var(--primary);
    border-left: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}

.header-search-btn:hover {
    background: var(--primary-dark);
}

.header-search-btn:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

/* Show header search on desktop */
@media (min-width: 1024px) {
    .header-search {
        display: flex;
    }
}

/* ============================================================================
   MOBILE NAV SEARCH
   ========================================================================= */

.mobile-nav-search {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}

.mobile-nav-search form {
    display: flex;
    gap: 0;
}

.mobile-nav-search input {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    font-size: var(--text-base);
    background: var(--light-bg);
}

.mobile-nav-search input:focus {
    outline: none;
    border-color: var(--primary);
}

.mobile-nav-search button {
    padding: var(--space-sm) var(--space-md);
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================================================
   MOBILE NAV SECTIONS
   ========================================================================= */

.mobile-nav-section {
    list-style: none;
}

.mobile-nav-section-title {
    display: block;
    padding: var(--space-md) var(--space-lg) var(--space-xs);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================================================
   DARK MODE - DROPDOWN & SEARCH
   ========================================================================= */

[data-theme="dark"] .nav-dropdown-menu {
    background: var(--dark-surface, #1e293b);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-dark);
}

[data-theme="dark"] .dropdown-item:hover {
    background: var(--dark-hover, #334155);
}

[data-theme="dark"] .dropdown-text strong {
    color: var(--text-dark);
}

[data-theme="dark"] .dropdown-divider {
    background: var(--dark-border, #334155);
}

[data-theme="dark"] .header-search-input {
    background: var(--dark-surface, #1e293b);
    border-color: var(--dark-border, #334155);
    color: var(--text-dark);
}

[data-theme="dark"] .header-search-input::placeholder {
    color: var(--text-light);
}

[data-theme="dark"] .mobile-nav {
    background: var(--dark-surface, #1e293b);
}

[data-theme="dark"] .mobile-nav-search input {
    background: var(--dark-bg, #0f172a);
    border-color: var(--dark-border, #334155);
    color: var(--text-dark);
}