/**
 * Modern Navigation Styles for Recruitment Platform
 * ------------------------------------------------
 * Enterprise SaaS-inspired sidebar navigation
 * Replaces adminlte3-navigation-scoped.css
 *
 * @version 1.0.0
 * @date 2026-02-09
 */

/* ==========================================================================
   NAVIGATION DESIGN TOKENS
   Extends design-tokens.css with navigation-specific variables
   ========================================================================== */

:root {
    /* Navigation-specific tokens (dark theme default) */
    --nav-bg: var(--bg-sidebar, #172B4D);
    --nav-text: rgba(255, 255, 255, 0.72);
    --nav-text-hover: rgba(255, 255, 255, 0.92);
    --nav-text-active: #FFFFFF;
    --nav-accent: var(--color-primary, #0052CC);
    --nav-accent-light: var(--color-primary-light, #DEEBFF);

    /* Item states */
    --nav-item-hover-bg: rgba(255, 255, 255, 0.08);
    --nav-item-active-bg: rgba(0, 82, 204, 0.24);
    --nav-submenu-bg: rgba(0, 0, 0, 0.12);

    /* Spacing */
    --nav-item-padding-x: 16px;
    --nav-item-padding-y: 10px;
    --nav-icon-size: 18px;
    --nav-icon-gap: 12px;

    /* Transitions - Material Design easing */
    --nav-transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --nav-submenu-transition: 280ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   SIDEBAR CONTAINER
   ========================================================================== */

.adminlte-v3-nav.app-sidebar {
    background: var(--nav-bg);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    transition: width var(--nav-transition), transform var(--nav-transition);
    z-index: 1038;
}

.adminlte-v3-nav .sidebar-wrapper {
    padding: 0;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.adminlte-v3-nav .sidebar-wrapper::-webkit-scrollbar {
    width: 6px;
}

.adminlte-v3-nav .sidebar-wrapper::-webkit-scrollbar-track {
    background: transparent;
}

.adminlte-v3-nav .sidebar-wrapper::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.adminlte-v3-nav .sidebar-wrapper::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ==========================================================================
   BRAND HEADER
   ========================================================================== */

.adminlte-v3-nav .sidebar-brand {
    padding: 20px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, transparent 100%);
}

.adminlte-v3-nav .brand-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: #fff;
    text-decoration: none;
    transition: opacity var(--nav-transition);
}

.adminlte-v3-nav .brand-link:hover {
    opacity: 0.9;
    color: #fff;
    text-decoration: none;
}

.adminlte-v3-nav .brand-link .brand-image {
    max-height: 36px;
    width: auto;
    border-radius: 6px;
}

.adminlte-v3-nav .brand-link .brand-text {
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

/* ==========================================================================
   SIDEBAR MENU CONTAINER
   ========================================================================== */

.adminlte-v3-nav .sidebar-menu {
    padding: 12px 0;
    list-style: none;
    margin: 0;
}

.adminlte-v3-nav .sidebar-menu.nav {
    display: block !important;
    flex: none !important;
}

.adminlte-v3-nav .sidebar-menu > .nav-item {
    margin-bottom: 2px;
    position: relative;
    display: block;
}

/* ==========================================================================
   NAV LINK BASE STYLES
   ========================================================================== */

.adminlte-v3-nav .nav-link {
    display: flex;
    align-items: center;
    padding: var(--nav-item-padding-y) var(--nav-item-padding-x);
    color: var(--nav-text);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 6px;
    margin: 0 8px;
    transition: all var(--nav-transition);
    position: relative;
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
}

/* ==========================================================================
   NAV ICON STYLES
   ========================================================================== */

.adminlte-v3-nav .nav-link .nav-icon {
    width: var(--nav-icon-size);
    min-width: var(--nav-icon-size);
    height: var(--nav-icon-size);
    margin-right: var(--nav-icon-gap);
    opacity: 0.7;
    transition: opacity var(--nav-transition), color var(--nav-transition);
    text-align: center;
    font-size: 1rem;
    line-height: var(--nav-icon-size);
}

/* ==========================================================================
   HOVER STATE
   ========================================================================== */

.adminlte-v3-nav .nav-link:hover {
    color: var(--nav-text-hover);
    background: var(--nav-item-hover-bg);
    text-decoration: none;
}

.adminlte-v3-nav .nav-link:hover .nav-icon {
    opacity: 1;
}

/* ==========================================================================
   ACTIVE STATE - with left accent bar
   ========================================================================== */

.adminlte-v3-nav .nav-link.active,
.adminlte-v3-nav .nav-item.active > .nav-link {
    color: var(--nav-text-active);
    background: var(--nav-item-active-bg);
    font-weight: 600;
}

.adminlte-v3-nav .nav-link.active::before,
.adminlte-v3-nav .nav-item.active > .nav-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    bottom: 6px;
    width: 3px;
    background: var(--nav-accent);
    border-radius: 0 2px 2px 0;
}

.adminlte-v3-nav .nav-link.active .nav-icon,
.adminlte-v3-nav .nav-item.active > .nav-link .nav-icon {
    opacity: 1;
    color: var(--nav-accent-light);
}

/* ==========================================================================
   PARENT ITEMS WITH SUBMENU (TREEVIEW)
   ========================================================================== */

/* Nav arrow icon (from AdminLte4Menu widget) - vertically centered */
.adminlte-v3-nav .nav-link .nav-arrow {
    margin-left: auto;
    font-size: 0.625rem;
    opacity: 0.5;
    transition: transform var(--nav-transition), opacity var(--nav-transition);
    flex-shrink: 0;
    align-self: center;
    line-height: 1;
    /* Fine-tune vertical position - Bootstrap Icons sit slightly low */
    transform: translateY(-1px);
}

/* Arrow rotated when menu is open */
.adminlte-v3-nav .nav-item.menu-open > .nav-link .nav-arrow {
    transform: translateY(-1px) rotate(90deg);
    opacity: 0.8;
}

/* Hover state for arrow */
.adminlte-v3-nav .nav-link:hover .nav-arrow {
    opacity: 0.8;
}

/* Parent item styling when expanded */
.adminlte-v3-nav .nav-item.menu-open > .nav-link {
    color: var(--nav-text-hover);
    background: var(--nav-item-hover-bg);
}

/* Remove any ::after pseudo-element that might conflict */
.adminlte-v3-nav .nav-link::after {
    display: none !important;
}

/* ==========================================================================
   SUBMENU (TREEVIEW) CONTAINER
   ========================================================================== */

.adminlte-v3-nav .nav-treeview {
    background: var(--nav-submenu-bg);
    border-radius: 6px;
    margin: 4px 8px 8px 8px;
    padding: 0;
    overflow: hidden;
    list-style: none;
    max-height: 0;
    opacity: 0;
    transition: max-height var(--nav-submenu-transition),
                opacity var(--nav-submenu-transition),
                padding var(--nav-submenu-transition);
}

/* Submenu expanded state */
.adminlte-v3-nav .nav-item.menu-open > .nav-treeview {
    max-height: 600px;
    opacity: 1;
    padding: 6px 0;
}

/* Submenu nav items */
.adminlte-v3-nav .nav-treeview > .nav-item {
    margin: 0;
}

/* Submenu links - indented and smaller */
.adminlte-v3-nav .nav-treeview .nav-link {
    padding: 8px 12px 8px 44px;
    font-size: 0.8125rem;
    font-weight: 400;
    margin: 0;
    border-radius: 4px;
}

.adminlte-v3-nav .nav-treeview .nav-link::before {
    display: none; /* No accent bar on submenu items */
}

.adminlte-v3-nav .nav-treeview .nav-icon {
    width: 14px;
    min-width: 14px;
    height: 14px;
    font-size: 0.75rem;
    line-height: 14px;
    margin-right: 10px;
}

/* Active submenu item */
.adminlte-v3-nav .nav-treeview .nav-link.active {
    background: rgba(0, 82, 204, 0.16);
    color: var(--nav-text-active);
    font-weight: 500;
}

/* ==========================================================================
   NESTED SUBMENUS (Third level)
   ========================================================================== */

.adminlte-v3-nav .nav-treeview .nav-treeview {
    margin: 4px 0 4px 16px;
    padding: 0;
    background: rgba(0, 0, 0, 0.08);
}

.adminlte-v3-nav .nav-treeview .nav-treeview .nav-link {
    padding-left: 56px;
    font-size: 0.75rem;
}

/* ==========================================================================
   SECTION HEADERS
   ========================================================================== */

.adminlte-v3-nav .nav-header {
    padding: 20px 16px 8px;
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.4);
    margin: 0;
    line-height: 1;
}

.adminlte-v3-nav .sidebar-menu > .nav-header:first-child {
    padding-top: 8px;
}

/* ==========================================================================
   FOCUS & ACCESSIBILITY
   ========================================================================== */

/* Focus visible for keyboard navigation */
.adminlte-v3-nav .nav-link:focus-visible {
    outline: 2px solid var(--nav-accent);
    outline-offset: 2px;
    background: var(--nav-item-hover-bg);
}

/* Skip link target */
.adminlte-v3-nav:target {
    scroll-margin-top: 1rem;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    .adminlte-v3-nav .nav-link,
    .adminlte-v3-nav .nav-treeview,
    .adminlte-v3-nav .nav-item.has-treeview > .nav-link::after,
    .adminlte-v3-nav.app-sidebar,
    .adminlte-v3-nav .brand-link {
        transition: none;
    }
}

/* High contrast mode support */
@media (forced-colors: active) {
    .adminlte-v3-nav .nav-link.active::before {
        background: CanvasText;
    }

    .adminlte-v3-nav .nav-link:focus-visible {
        outline: 2px solid CanvasText;
    }
}

/* ==========================================================================
   LIGHT THEME SUPPORT
   ========================================================================== */

.adminlte-v3-nav.theme-light {
    --nav-bg: #FFFFFF;
    --nav-text: var(--text-secondary, #5E6C84);
    --nav-text-hover: var(--text-primary, #172B4D);
    --nav-text-active: var(--color-primary, #0052CC);
    --nav-item-hover-bg: var(--bg-hover, #EBECF0);
    --nav-item-active-bg: var(--color-primary-light, #DEEBFF);
    --nav-submenu-bg: var(--bg-subtle, #FAFBFC);
}

.adminlte-v3-nav.theme-light .sidebar-brand {
    border-bottom-color: var(--border-subtle, #DFE1E6);
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.02) 0%, transparent 100%);
}

.adminlte-v3-nav.theme-light .brand-link {
    color: var(--text-primary, #172B4D);
}

.adminlte-v3-nav.theme-light .brand-link:hover {
    color: var(--text-primary, #172B4D);
}

.adminlte-v3-nav.theme-light .nav-header {
    color: var(--text-tertiary, #7A869A);
}

.adminlte-v3-nav.theme-light .sidebar-wrapper::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
}

.adminlte-v3-nav.theme-light .sidebar-wrapper::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.25);
}

/* ==========================================================================
   OCEAN THEME (Dark blue variant)
   ========================================================================== */

.adminlte-v3-nav.theme-ocean {
    --nav-bg: #0d3b66;
    --nav-accent: #00b4d8;
    --nav-accent-light: #90e0ef;
    --nav-item-hover-bg: rgba(255, 255, 255, 0.1);
    --nav-item-active-bg: rgba(0, 180, 216, 0.2);
    --nav-submenu-bg: rgba(0, 0, 0, 0.15);
}

/* ==========================================================================
   MIDNIGHT THEME (Deep dark)
   ========================================================================== */

.adminlte-v3-nav.theme-midnight {
    --nav-bg: #1a1a2e;
    --nav-accent: #e94560;
    --nav-accent-light: #ff6b6b;
    --nav-item-hover-bg: rgba(255, 255, 255, 0.06);
    --nav-item-active-bg: rgba(233, 69, 96, 0.2);
    --nav-submenu-bg: rgba(0, 0, 0, 0.2);
}

/* ==========================================================================
   RESPONSIVE - COLLAPSED SIDEBAR (Mini Mode)
   ========================================================================== */

.sidebar-collapse .adminlte-v3-nav.app-sidebar {
    width: 4.6rem;
}

.sidebar-collapse .adminlte-v3-nav .sidebar-brand {
    padding: 16px 8px;
}

.sidebar-collapse .adminlte-v3-nav .brand-text {
    display: none;
}

.sidebar-collapse .adminlte-v3-nav .nav-link {
    justify-content: center;
    padding: 12px 8px;
    margin: 0 4px;
}

.sidebar-collapse .adminlte-v3-nav .nav-link > span:not(.nav-icon),
.sidebar-collapse .adminlte-v3-nav .nav-link > p {
    display: none;
}

.sidebar-collapse .adminlte-v3-nav .nav-link .nav-icon {
    margin: 0;
    font-size: 1.25rem;
    width: 24px;
    min-width: 24px;
}

.sidebar-collapse .adminlte-v3-nav .nav-link::after {
    display: none;
}

.sidebar-collapse .adminlte-v3-nav .nav-treeview {
    display: none;
}

.sidebar-collapse .adminlte-v3-nav .nav-header {
    display: none;
}

/* Hover expand on mini mode - show full sidebar on hover */
/* Increased from 250px to 280px to fix label truncation (UAT issue Phase 3.1) */
.sidebar-collapse .adminlte-v3-nav.app-sidebar:hover {
    width: 280px;
}

.sidebar-collapse .adminlte-v3-nav.app-sidebar:hover .brand-text {
    display: inline;
}

.sidebar-collapse .adminlte-v3-nav.app-sidebar:hover .nav-link {
    justify-content: flex-start;
    padding: var(--nav-item-padding-y) var(--nav-item-padding-x);
    margin: 0 8px;
}

.sidebar-collapse .adminlte-v3-nav.app-sidebar:hover .nav-link > span,
.sidebar-collapse .adminlte-v3-nav.app-sidebar:hover .nav-link > p {
    display: inline;
}

.sidebar-collapse .adminlte-v3-nav.app-sidebar:hover .nav-link .nav-icon {
    margin-right: var(--nav-icon-gap);
    font-size: 1rem;
    width: var(--nav-icon-size);
    min-width: var(--nav-icon-size);
}

.sidebar-collapse .adminlte-v3-nav.app-sidebar:hover .nav-link::after {
    display: block;
}

.sidebar-collapse .adminlte-v3-nav.app-sidebar:hover .nav-treeview {
    display: block;
}

.sidebar-collapse .adminlte-v3-nav.app-sidebar:hover .nav-header {
    display: block;
}

/* ==========================================================================
   RESPONSIVE - MOBILE OVERLAY
   ========================================================================== */

@media (max-width: 991.98px) {
    .adminlte-v3-nav.app-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        transform: translateX(-100%);
        transition: transform 300ms ease-in-out;
        z-index: 1045;
        width: 280px !important;
    }

    /* Override mini-sidebar strip on mobile — fully hide when collapsed */
    .sidebar-collapse .adminlte-v3-nav.app-sidebar {
        width: 0 !important;
        overflow: hidden;
        transform: translateX(-100%);
    }

    .sidebar-open .adminlte-v3-nav.app-sidebar {
        width: 280px !important;
        transform: translateX(0);
    }

    /* Backdrop when sidebar is open */
    .sidebar-open::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1040;
        opacity: 1;
        transition: opacity 300ms ease-in-out;
    }
}

/* ==========================================================================
   BADGE STYLES (Notification counts)
   ========================================================================== */

.adminlte-v3-nav .nav-link .badge {
    margin-left: auto;
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 3px 6px;
    border-radius: 10px;
    line-height: 1;
}

.adminlte-v3-nav .nav-link .badge.bg-danger {
    background: var(--color-danger, #DE350B) !important;
}

.adminlte-v3-nav .nav-link .badge.bg-warning {
    background: var(--color-warning, #FFAB00) !important;
    color: var(--text-primary, #172B4D);
}

.adminlte-v3-nav .nav-link .badge.bg-info {
    background: var(--color-info, #00B8D9) !important;
}

/* ==========================================================================
   UTILITY: Prevent text wrapping
   ========================================================================== */

.adminlte-v3-nav .nav-link > p {
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}