/* ========================================
   PROCUREMENT SYSTEM - MAIN STYLESHEET
   Modern, Professional, Optimized Design
   ======================================== */

/* static\css\main.css
=========================
   CSS VARIABLES (Design System)
   ========================= */
:root {
    /* Primary Colors - Purple Gradient */
    --primary-gradient: linear-gradient(135deg, #7c3aed 0%, #a78bfa 100%);
    --primary-500: #7c3aed;
    --primary-600: #6d28d9;
    --primary-700: #5b21b6;
    --primary-400: #a78bfa;
    --primary-300: #c4b5fd;
    
    /* Neutral Colors */
    --dark-bg: #1a1d2e;
    --dark-secondary: #252938;
    --dark-hover: #2d3348;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* Background Colors */
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-card: #ffffff;
    
    /* Border & Shadow */
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --sidebar-width: 260px;
    --sidebar-collapsed: 80px;
    --navbar-height: 70px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-index layers */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* =========================
   RESET & BASE STYLES
   ========================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}


/* =========================
   AUTH PAGES (No Sidebar)
   ========================= */

.auth-page {
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

.auth-content {
    width: 100%;
    min-height: 100vh;
}

/* Remove any sidebar-related padding/margins */
.auth-page .sidebar,
.auth-page .navbar,
.auth-page .main-content {
    display: none !important;
}

/* =========================
   CRP LOGO - PYTHAGOREAN TRIANGLE (LARGER + C LEFT)
   ========================= */

.logo-icon.crp-logo {
    width: 44px;
    height: 44px;
    background: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    border: 2px solid #f5f5f5;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.logo-icon.crp-logo:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
}

/* Triangle Container */
.crp-triangle {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 1px;
    padding: 2px 0;
    padding-left: 2px;
}

/* Top Letter: C (Black) - LARGER */
.crp-c {
    font-size: 1rem;
    font-weight: 800;
    color: #2c3e50;
    letter-spacing: 0;
    line-height: 1;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Bottom Row: R + P */
.crp-bottom {
    display: flex;
    gap: 3px;
    align-items: center;
}

/* R Letter (Pink/Coral) - LARGER */
.crp-r {
    font-size: 1rem;
    font-weight: 800;
    color: #e85d75;
    letter-spacing: 0;
    line-height: 1;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* P Letter (Black) - LARGER */
.crp-p {
    font-size: 1rem;
    font-weight: 800;
    color: #2c3e50;
    letter-spacing: 0;
    line-height: 1;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Collapsed Sidebar */
.sidebar-collapsed .logo-icon.crp-logo {
    width: 38px;
    height: 38px;
    margin: 0 auto;
}

.sidebar-collapsed .crp-c,
.sidebar-collapsed .crp-r,
.sidebar-collapsed .crp-p {
    font-size: 0.85rem;
}

.sidebar-collapsed .crp-triangle {
    gap: 0px;
    padding-left: 1px;
}

.sidebar-collapsed .crp-bottom {
    gap: 2px;
}


/* =========================
   LOADING OVERLAY
   ========================= */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--dark-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(124, 58, 237, 0.2);
    border-top-color: var(--primary-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* =========================
   LAYOUT STRUCTURE
   ========================= */
.app-wrapper {
    display: flex;
    min-height: 100vh;
    background: var(--bg-primary);
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition-base);
}

.sidebar-collapsed .main-content {
    margin-left: var(--sidebar-collapsed);
}

.content-wrapper {
    flex: 1;
    padding: 2rem;
    margin-top: var(--navbar-height);
}

/* =========================
   SIDEBAR STYLES
   ========================= */
.sidebar {
    position: fixed;
    left: 0;
    top: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--dark-bg);
    z-index: var(--z-fixed);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-collapsed .sidebar {
    width: var(--sidebar-collapsed);
}

/* Sidebar Header */
.sidebar-header {
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    min-height: var(--navbar-height);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.sidebar-logo:hover {
    opacity: 0.8;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--primary-gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    font-weight: 700;
    flex-shrink: 0;
}

.logo-text {
    font-size: -0.75rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    opacity: 1;
    transition: opacity var(--transition-fast);
}

.sidebar-collapsed .logo-text {
    opacity: 0;
    width: 0;
}

/* Sidebar Navigation */
.sidebar-nav {
    flex: 1;
    padding: 1.5rem 0;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.nav-section {
    margin-bottom: 1.5rem;
}

.nav-section-title {
    padding: 0 1.5rem;
    margin-bottom: 0.5rem;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    opacity: 1;
    transition: opacity var(--transition-fast);
}

.sidebar-collapsed .nav-section-title {
    opacity: 0;
    height: 0;
    margin: 0;
    padding: 0;
}

/* =========================
   COLLAPSIBLE NAV SECTIONS
   ========================= */

.nav-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    border-radius: 8px;
    margin: 0.25rem 0.5rem;
    user-select: none;
}

.nav-section-header:hover {
    background: var(--dark-hover);
}

.nav-section-header .nav-section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    flex: 1;
    padding: 0;
    margin: 0;
    opacity: 1;
    text-transform: none;
    letter-spacing: normal;
}

.nav-section-header .nav-section-title i:first-child {
    font-size: 1rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.nav-section-toggle {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    transition: transform var(--transition-fast);
    flex-shrink: 0;
}

.nav-section.expanded .nav-section-toggle {
    transform: rotate(180deg);
}

/* Submenu Styles */
.nav-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base) ease-in-out;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    margin: 0 0.5rem 0.5rem 0.5rem;
}

.nav-submenu.active {
    max-height: 600px;
}

.nav-submenu .nav-link {
    padding-left: 3.5rem;
    font-size: var(--font-size-sm);
}

/* Collapsed Sidebar Adjustments */
.sidebar-collapsed .nav-section-header {
    padding: 0.75rem;
    justify-content: center;
}

/* Use BEM methodology for flatter, more performant CSS */
.nav-section-header__title--collapsed {
    opacity: 0;
    width: 0;
    overflow: hidden;
}

/* GPU acceleration for smooth animations */
.nav-submenu {
    will-change: max-height;
    transform: translateZ(0);
}

/* Optimize sidebar collapse animation */
.sidebar {
    transition: width var(--transition-base);
    transform: translateZ(0);
    backface-visibility: hidden;
}

.sidebar-collapsed .nav-submenu {
    display: none;
}

/* Badge for Pending Items */
.nav-badge-section {
    margin-left: auto;
    padding: 0.125rem 0.5rem;
    background: var(--primary-500);
    color: white;
    border-radius: 12px;
    font-size: 0.625rem;
    font-weight: 700;
    min-width: 20px;
    text-align: center;
}

.sidebar-collapsed .nav-badge-section {
    display: none;
}

/* Active Section Highlighting */
.nav-section.expanded {
    border-left: 3px solid var(--primary-500);
    margin-left: 0;
    padding-left: 0.5rem;
    transition: all var(--transition-base);
}

.sidebar-collapsed .nav-section.expanded {
    border-left: none;
    margin-left: 0;
    padding-left: 0;
}

/* =========================
   STANDARD NAV MENU
   ========================= */

.nav-menu {
    list-style: none;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    position: relative;
    font-weight: 500;
}

.nav-link:hover {
    background: var(--dark-hover);
    color: var(--text-primary);
}

.nav-link.active {
    background: var(--dark-hover);
    color: var(--primary-400);
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-gradient);
}

.nav-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.nav-text {
    white-space: nowrap;
    opacity: 1;
    transition: opacity var(--transition-fast);
}

.sidebar-collapsed .nav-text {
    opacity: 0;
    width: 0;
}

.nav-badge {
    margin-left: auto;
    padding: 0.125rem 0.5rem;
    background: var(--primary-500);
    color: white;
    border-radius: 12px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    opacity: 1;
    transition: opacity var(--transition-fast);
}

.sidebar-collapsed .nav-badge {
    opacity: 0;
    width: 0;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.sidebar-toggle {
    width: 100%;
    padding: 0.625rem;
    background: var(--dark-secondary);
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.sidebar-toggle:hover {
    background: var(--dark-hover);
    color: var(--text-primary);
}

.sidebar-toggle i {
    transition: transform var(--transition-fast);
}

.sidebar-collapsed .sidebar-toggle i {
    transform: rotate(180deg);
}

/* =========================
   NAVBAR STYLES
   ========================= */
.navbar {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    height: var(--navbar-height);
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    z-index: var(--z-sticky);
    transition: left var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.sidebar-collapsed .navbar {
    left: var(--sidebar-collapsed);
}

.navbar-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.page-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--dark-bg);
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar-action {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 10px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.navbar-action:hover {
    background: var(--bg-secondary);
    color: var(--dark-bg);
}

.notification-badge {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 8px;
    height: 8px;
    background: var(--error);
    border: 2px solid var(--bg-card);
    border-radius: 50%;
}

/* Enhanced Notification Styles */
.notification-count-badge {
    background: #ef4444;
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 700;
    margin-left: 0.5rem;
}

.notification-item {
    position: relative;
    padding-right: 3rem;
}

.notification-item.unread {
    border-left: 3px solid #3b82f6;
}

.btn-mark-read-mini {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    border-radius: 6px;
    border: none;
    background: #f3f4f6;
    color: #6b7280;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    font-size: 0.75rem;
}

.btn-mark-read-mini:hover {
    background: #10b981;
    color: white;
}

.notification-time i {
    font-size: 0.7rem;
    opacity: 0.7;
}

.view-all-notifications i {
    margin-right: 0.4rem;
}

/* Icon color classes */
.notification-icon.success {
    background: #d1fae5;
    color: #059669;
}

.notification-icon.warning {
    background: #fef3c7;
    color: #d97706;
}

.notification-icon.error {
    background: #fee2e2;
    color: #dc2626;
}

.notification-icon.info {
    background: #dbeafe;
    color: #2563eb;
}

/* User Dropdown */
.user-dropdown {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.user-avatar:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.user-menu {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    min-width: 220px;
    background: var(--bg-card);
    border-radius: 12px;
    box-shadow: var(--shadow-xl);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
    border: 1px solid var(--border-color);
}

.user-dropdown.active .user-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-menu-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.user-name {
    font-weight: 600;
    color: var(--dark-bg);
    margin-bottom: 0.25rem;
}

.user-role {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.user-menu-items {
    padding: 0.5rem;
}

.user-menu-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--dark-bg);
    text-decoration: none;
    border-radius: 8px;
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
}

.user-menu-item:hover {
    background: var(--bg-secondary);
}

.user-menu-item i {
    width: 18px;
    color: var(--text-muted);
}

.user-menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.5rem 0;
}

/* =========================
   BREADCRUMB
   ========================= */
.breadcrumb-nav {
    margin-bottom: 2rem;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    flex-wrap: wrap;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.breadcrumb-item a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--primary-500);
}

.breadcrumb-item:not(:last-child)::after {
    content: '›';
    margin-left: 0.5rem;
    color: var(--text-muted);
}

.breadcrumb-item.active {
    color: var(--dark-bg);
    font-weight: 500;
}

/* =========================
   MESSAGES & ALERTS
   ========================= */
.messages-container {
    position: fixed;
    top: calc(var(--navbar-height) + 1rem);
    right: 1rem;
    z-index: var(--z-popover);
    max-width: 400px;
}

.alert {
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease-out;
    border-left: 4px solid;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.alert-content {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    flex: 1;
}

.alert-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.alert-message {
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

.alert-close {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
    padding: 0;
    flex-shrink: 0;
}

.alert-close:hover {
    opacity: 1;
}

/* Alert Variants */
.alert-success {
    background: #ecfdf5;
    color: #065f46;
    border-left-color: var(--success);
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border-left-color: var(--error);
}

.alert-warning {
    background: #fffbeb;
    color: #92400e;
    border-left-color: var(--warning);
}

.alert-info {
    background: #eff6ff;
    color: #1e40af;
    border-left-color: var(--info);
}

/* =========================
   PAGE CONTENT
   ========================= */
.page-content {
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* =========================
   FOOTER
   ========================= */
.app-footer {
    padding: 1.5rem 2rem;
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-content p {
    margin: 0;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-500);
}

/* =========================
   RESPONSIVE DESIGN
   ========================= */

/* Tablet */
@media (max-width: 1024px) {
    .content-wrapper {
        padding: 1.5rem;
    }
    
    .navbar {
        padding: 0 1.5rem;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 0;
        --navbar-height: 60px;
    }
    
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .navbar {
        left: 0;
    }
    
    .content-wrapper {
        padding: 1rem;
    }
    
    .page-title {
        font-size: var(--font-size-lg);
    }
    
    .messages-container {
        left: 1rem;
        right: 1rem;
        max-width: none;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    /* Mobile Nav Sections */
    .nav-submenu .nav-link {
        padding-left: 2.5rem;
        font-size: 0.8125rem;
    }
    
    .nav-section-header {
        padding: 0.625rem 1rem;
    }
    
    .nav-section.expanded {
        border-left: 2px solid var(--primary-500);
        padding-left: 0.25rem;
    }
}

/* Mobile Overlay */
.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: calc(var(--z-fixed) - 1);
    opacity: 0;
    transition: opacity var(--transition-base);
}

@media (max-width: 768px) {
    .mobile-overlay.active {
        display: block;
        opacity: 1;
    }
}

/* =========================
   UTILITY CLASSES
   ========================= */
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary-500); }
.text-success { color: var(--success); }
.text-error { color: var(--error); }
.text-warning { color: var(--warning); }

.bg-primary { background: var(--primary-gradient); }
.bg-card { background: var(--bg-card); }

.d-none { display: none; }
.d-flex { display: flex; }
.d-block { display: block; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }


/* =========================
   ENHANCED NAV SECTIONS - SMOOTH ANIMATIONS
   ========================= */

/* Subsection title styling */
.nav-subsection-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    padding-left: 3rem;
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.nav-subsection-title i {
    font-size: 0.875rem;
}

.sidebar-collapsed .nav-subsection-title {
    display: none;
}

/* Enhanced nav submenu with SMOOTH animations */
.nav-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.3s ease,
                padding 0.3s ease;
    opacity: 0;
    padding: 0;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    margin: 0 0.5rem 0.5rem 0.5rem;
}

.nav-submenu.active {
    max-height: 2000px;
    opacity: 1;
    padding: 0.5rem 0;
}

/* Smooth chevron rotation */
.nav-section-toggle {
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
    will-change: transform;
}

.nav-section.expanded .nav-section-toggle {
    transform: rotate(180deg);
}

/* Ensure chevrons are visible when sidebar is collapsed */
.sidebar-collapsed .nav-section-toggle {
    display: none;
}

/* Enhanced sidebar nav scrolling */
.sidebar-nav {
    flex: 1;
    padding: 1.5rem 0;
    overflow-y: auto;
    overflow-x: hidden;
    max-height: calc(100vh - 150px);
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

/* Custom scrollbar for webkit browsers */
.sidebar-nav::-webkit-scrollbar {
    width: 6px;
}

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

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
    transition: background 0.2s;
}

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

/* Smooth scroll behavior */
.sidebar-nav {
    scroll-behavior: smooth;
}

/* Nav divider inside submenu */
.nav-submenu .nav-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
    margin: 0.75rem 1.5rem;
    border: none;
    list-style: none;
}

/* Enhanced nav section header */
.nav-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.5rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
    margin: 0.25rem 0.5rem;
    user-select: none;
    position: relative;
}

.nav-section-header:hover {
    background: var(--dark-hover);
}

.nav-section-header:active {
    transform: scale(0.98);
}

/* Keyboard focus styles */
.nav-section-header:focus {
    outline: 2px solid var(--primary-400);
    outline-offset: 2px;
}

.nav-section-header .nav-section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    flex: 1;
    padding: 0;
    margin: 0;
    opacity: 1;
    text-transform: none;
    letter-spacing: normal;
}

.nav-section-header .nav-section-title i:first-child {
    font-size: 1rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

/* Active section indicator */
.nav-section.expanded {
    position: relative;
}

.nav-section.expanded::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-gradient);
    border-radius: 0 3px 3px 0;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.nav-section.expanded::before {
    opacity: 1;
}

/* ========================================
   ENHANCED ACTIVE LINK DETECTION
   ======================================== */

/* Active link highlight for submenu items */
.nav-submenu .nav-link.active {
    background: var(--dark-hover);
    color: var(--primary-400);
    position: relative;
}

.nav-submenu .nav-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-gradient);
}

/* Keep section expanded when it contains active link */
/* Only apply ALL active-section styles when the section is actually expanded */
.nav-section.expanded:has(.nav-link.active) {
    border-left: 3px solid var(--primary-500);
    margin-left: 0;
    padding-left: 0.5rem;
}

.nav-section.expanded:has(.nav-link.active) .nav-submenu {
    max-height: 600px;
    opacity: 1;
    padding: 0.5rem 0;
}

.nav-section.expanded:has(.nav-link.active) .nav-section-header {
    background: var(--dark-hover);
}

.nav-section.expanded:has(.nav-link.active) .nav-section-toggle {
    transform: rotate(180deg);
}

/* ========================================
   COLLAPSED SIDEBAR - ICON ONLY MODE
   ======================================== */

.sidebar-collapsed .nav-section-header {
    padding: 0.75rem;
    justify-content: center;
    margin: 0.5rem;
    border-radius: 10px;
}

/* Hide ALL text when collapsed */
.sidebar-collapsed .nav-section-header .nav-section-title span,
.sidebar-collapsed .nav-section-title span,
.sidebar-collapsed .nav-text,
.sidebar-collapsed .nav-badge,
.sidebar-collapsed .nav-section-toggle {
    opacity: 0;
    width: 0;
    overflow: hidden;
    margin: 0;
    padding: 0;
}

/* Show ONLY the icon */
.sidebar-collapsed .nav-section-header .nav-section-title {
    justify-content: center;
    width: 100%;
}

.sidebar-collapsed .nav-section-header .nav-section-title i:first-child {
    margin: 0;
    font-size: 1.25rem;
}

/* Hide submenus completely when collapsed */
.sidebar-collapsed .nav-submenu {
    display: none !important;
}

/* Center nav links and show only icons */
.sidebar-collapsed .nav-link {
    justify-content: center;
    padding: 0.75rem;
}

.sidebar-collapsed .nav-icon {
    margin: 0;
}

/* Hide section titles when collapsed */
.sidebar-collapsed .nav-section-title:not(.nav-section-header .nav-section-title) {
    display: none;
}

/* Ensure consistent icon sizing in collapsed mode */
.sidebar-collapsed .nav-section-header i,
.sidebar-collapsed .nav-link i {
    font-size: 1.25rem;
}

/* Tooltip on hover for collapsed items */
.sidebar-collapsed .nav-section-header:hover::after,
.sidebar-collapsed .nav-link:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    margin-left: 1rem;
    padding: 0.5rem 0.75rem;
    background: var(--dark-bg);
    color: white;
    border-radius: 6px;
    white-space: nowrap;
    font-size: var(--font-size-xs);
    z-index: 1000;
    pointer-events: none;
    box-shadow: var(--shadow-lg);
}

/* Badge positioning in collapsed sidebar */
.sidebar-collapsed .nav-badge {
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    min-width: 18px;
    height: 18px;
    padding: 0.125rem 0.375rem;
    font-size: 0.625rem;
}

/* Ensure smooth transitions for all nav elements */
.nav-section,
.nav-section-header,
.nav-submenu,
.nav-link,
.nav-section-toggle {
    will-change: transform, opacity, max-height;
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Animation optimization */
@media (prefers-reduced-motion: reduce) {
    .nav-submenu,
    .nav-section-toggle {
        transition: none;
    }
}

/* Mobile optimizations */
@media (max-width: 768px) {
    .sidebar-nav {
        max-height: calc(100vh - 120px);
    }
    
    .nav-submenu.active {
        max-height: 1500px;
    }
    
    .nav-subsection-title {
        padding-left: 2.5rem;
        font-size: 0.7rem;
    }
}