:root {
            --sidebar-primary: #6a0dad;
            --sidebar-primary-dark: #4b0082;
            --sidebar-primary-light: #9b59b6;
            --sidebar-accent: #e1b0ff;
            --sidebar-bg: #ffffff;
            --sidebar-text: #333333;
            --sidebar-text-light: #666666;
            --sidebar-active: var(--sidebar-primary);
            --sidebar-hover: #f8f5ff;
            --sidebar-border: #e0e0e0;
            --sidebar-icon: var(--sidebar-primary);
            --sidebar-dropdown-bg: #f9f9f9;
            --sidebar-width: 280px;
            --sidebar-width-collapsed: 80px;
            --transition-speed: 0.2s;
            --border-radius: 10px;
            --border-radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
            --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
            --mobile-header-height: 60px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
        }

        @font-face {
            font-family: 'Inter';
            font-style: normal;
            font-weight: 400;
            src: url(https://fonts.gstatic.com/s/inter/v12/UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuLyfAZ9hjg.woff2) format('woff2');
        }

        @font-face {
            font-family: 'Inter';
            font-style: normal;
            font-weight: 500;
            src: url(https://fonts.gstatic.com/s/inter/v12/UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuI6fAZ9hjg.woff2) format('woff2');
        }

        @font-face {
            font-family: 'Inter';
            font-style: normal;
            font-weight: 600;
            src: url(https://fonts.gstatic.com/s/inter/v12/UcCO3FwrK3iLTeHuS_fvQtMwCp50KnMw2boKoduKmMEVuGKYAZ9hjg.woff2) format('woff2');
        }

        body {
            background-color: #f5f5f5;
            display: flex;
            min-height: 100vh;
        }

        /* Sidebar Styles */
        .sidebar {
            width: var(--sidebar-width);
            height: 100vh;
            background-color: var(--sidebar-bg);
            color: var(--sidebar-text);
            position: fixed;
            left: 0;
            top: 0;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-speed) ease;
            z-index: 1000;
            overflow: hidden;
            border-right: 1px solid var(--sidebar-border);
        }

        .sidebar-header {
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: linear-gradient(135deg, var(--sidebar-primary) 0%, var(--sidebar-primary-dark) 100%);
            position: relative;
            z-index: 1;
        }

        .logo-container {
            display: flex;
            align-items: center;
            gap: 12px;
            min-width: calc(var(--sidebar-width) - 40px);
            color: white;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--border-radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background-color: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(5px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .logo-icon img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .sidebar-title {
            font-size: 18px;
            font-weight: 600;
            white-space: nowrap;
            transition: opacity var(--transition-speed) ease;
            letter-spacing: 0.5px;
        }

        .sidebar-toggle {
            background: none;
            border: none;
            color: white;
            font-size: 18px;
            cursor: pointer;
            padding: 5px;
            margin-left: auto;
            transition: all 0.2s ease;
            background-color: rgba(255, 255, 255, 0.15);
            border-radius: var(--border-radius-sm);
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .sidebar-toggle:hover {
            color: white;
            background-color: rgba(255, 255, 255, 0.25);
            transform: scale(1.05);
        }

        .sidebar-nav {
            flex: 1;
            overflow-y: auto;
            padding: 20px 10px;
            scrollbar-width: thin;
            scrollbar-color: var(--sidebar-bg) transparent;
        }

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

        .sidebar-nav::-webkit-scrollbar-thumb {
            background-color: var(--sidebar-primary-light);
            border-radius: 3px;
        }

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

        .nav-item {
            margin: 8px 0;
            position: relative;
        }

        .nav-link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            border-radius: var(--border-radius-sm);
            color: var(--sidebar-text);
            text-decoration: none;
            transition: all var(--transition-speed) ease;
            white-space: nowrap;
            margin: 0 8px;
        }

        .link-content {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .link-icon {
            width: 24px;
            height: 24px;
            text-align: center;
            color: var(--sidebar-icon);
            font-size: 16px;
            flex-shrink: 0;
            transition: all var(--transition-speed) ease;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            background-color: rgba(106, 13, 173, 0.1);
            padding: 4px;
        }

        .link-text {
            font-size: 14px;
            font-weight: 500;
            transition: opacity var(--transition-speed) ease;
        }

        .nav-link:hover {
            background-color: var(--sidebar-hover);
            color: var(--sidebar-primary-dark);
            transform: translateX(4px);
        }

        .nav-link:hover .link-icon {
            color: white;
            background-color: var(--sidebar-primary);
            transform: scale(1.05);
        }

        .nav-link.active {
            background-color: var(--sidebar-hover);
            color: var(--sidebar-primary-dark);
            font-weight: 600;
            box-shadow: var(--shadow-sm);
        }

        .nav-link.active .link-icon {
            color: white;
            background-color: var(--sidebar-primary);
        }

        /* Dropdown styles */
        .dropdown-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            border-radius: var(--border-radius-sm);
            cursor: pointer;
            transition: all var(--transition-speed) ease;
            margin: 0 8px;
        }

        .dropdown-header:hover {
            background-color: var(--sidebar-hover);
            color: var(--sidebar-primary-dark);
        }

        .dropdown-header:hover .link-icon {
            color: white;
            background-color: var(--sidebar-primary);
        }

        .dropdown-icon {
            font-size: 12px;
            transition: transform var(--transition-speed) ease;
            color: var(--sidebar-text-light);
        }

        .dropdown-menu {
            max-height: 0;
            overflow: hidden;
            padding-left: 24px;
            transition: max-height var(--transition-speed) ease;
        }

        .dropdown-menu.open {
            max-height: 500px;
        }

        .dropdown-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 16px;
            color: var(--sidebar-text-light);
            text-decoration: none;
            font-size: 13px;
            border-radius: var(--border-radius-sm);
            transition: all var(--transition-speed) ease;
            white-space: nowrap;
            margin: 4px 8px;
        }

        .dropdown-item:hover {
            background-color: var(--sidebar-hover);
            color: var(--sidebar-primary-dark);
            padding-left: 20px;
        }

        .dropdown-item i {
            font-size: 14px;
            width: 20px;
            text-align: center;
            color: var(--sidebar-primary-light);
            transition: all var(--transition-speed) ease;
        }

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

        /* Sidebar footer */
        .sidebar-footer {
            padding: 16px;
            border-top: 1px solid var(--sidebar-border);
            background-color: var(--sidebar-bg);
            position: relative;
        }

        .sidebar-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 20px;
            right: 20px;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--sidebar-primary-light), transparent);
        }

        .user-profile {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background-color: var(--sidebar-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            overflow: hidden;
            border: 2px solid var(--sidebar-hover);
            box-shadow: var(--shadow-sm);
        }

        .avatar i {
            font-size: 20px;
            color: white;
        }

        .avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .user-info {
            display: flex;
            flex-direction: column;
            min-width: calc(var(--sidebar-width) - 80px);
            overflow: hidden;
        }

        .username {
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            color: var(--sidebar-text);
        }

        .user-role {
            font-size: 12px;
            color: var(--sidebar-primary-light);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            font-weight: 500;
        }

        .logout-btn {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 16px;
            color: var(--sidebar-primary-dark);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            border-radius: var(--border-radius-sm);
            transition: all var(--transition-speed) ease;
            background-color: var(--sidebar-hover);
            width: calc(100% - 32px);
            margin: 0 auto;
        }

        .logout-btn:hover {
            background-color: var(--sidebar-primary);
            color: white;
            transform: translateX(4px);
        }

        .logout-btn i {
            font-size: 16px;
            transition: transform var(--transition-speed) ease;
        }

        .logout-btn:hover i {
            transform: translateX(2px);
        }

        /* Collapsed state */
        .sidebar.collapsed {
            width: var(--sidebar-width-collapsed);
        }

        .sidebar.collapsed .sidebar-title,
        .sidebar.collapsed .link-text,
        .sidebar.collapsed .dropdown-icon,
        .sidebar.collapsed .username,
        .sidebar.collapsed .user-role,
        .sidebar.collapsed .dropdown-item span,
        .sidebar.collapsed .logout-btn span {
            opacity: 0;
            width: 0;
            height: 0;
            overflow: hidden;
            display: inline-block;
        }

        .sidebar.collapsed .logo-container {
            justify-content: center;
            min-width: auto;
        }

        .sidebar.collapsed .sidebar-nav {
            overflow-x: hidden;
        }

        .sidebar.collapsed .dropdown-menu {
            position: absolute;
            left: var(--sidebar-width-collapsed);
            background-color: var(--sidebar-bg);
            min-width: 220px;
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
            box-shadow: var(--shadow-md);
            z-index: 1001;
            padding-left: 0;
            max-height: 0;
        }

        .sidebar.collapsed .dropdown:hover .dropdown-menu {
            max-height: 500px;
            display: block;
        }

        .sidebar.collapsed .logout-btn {
            justify-content: center;
            padding: 10px;
            width: auto;
            margin: 0 8px;
        }

        .sidebar.collapsed .nav-link {
            justify-content: center;
        }

        .sidebar.collapsed .dropdown-header {
            justify-content: center;
        }

        .sidebar.collapsed .nav-link.active {
            box-shadow: none;
            background-color: var(--sidebar-primary);
            color: white;
        }

        .sidebar.collapsed .nav-link.active .link-icon {
            color: white;
            background-color: transparent;
        }

        /* Tooltips for collapsed state */
        .sidebar.collapsed .nav-link,
        .sidebar.collapsed .dropdown-header {
            position: relative;
        }

        .sidebar.collapsed .nav-link::after,
        .sidebar.collapsed .dropdown-header::after {
            content: attr(data-tooltip);
            position: absolute;
            left: 100%;
            top: 50%;
            transform: translateY(-50%);
            background-color: var(--sidebar-text);
            color: white;
            padding: 6px 12px;
            border-radius: var(--border-radius-sm);
            font-size: 12px;
            white-space: nowrap;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.2s ease;
            margin-left: 10px;
            z-index: 1002;
        }

        .sidebar.collapsed .nav-link:hover::after,
        .sidebar.collapsed .dropdown-header:hover::after {
            opacity: 1;
        }

        /* Main Content Area */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            padding: 20px;
            transition: margin-left var(--transition-speed) ease;
        }

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

        /* Mobile styles - Enhanced for better usability */
        @media (max-width: 992px) {
            /* Hide desktop sidebar header on mobile */
            .sidebar-header {
                display: none;
            }
            
            /* Mobile header for toggling sidebar */
            .mobile-header {
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 0 16px;
                height: var(--mobile-header-height);
                background: linear-gradient(135deg, var(--sidebar-primary) 0%, var(--sidebar-primary-dark) 100%);
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                z-index: 999;
                box-shadow: var(--shadow-md);
            }
            
            .mobile-header .logo-container {
                color: white;
                min-width: auto;
            }
            
            .mobile-header .sidebar-toggle {
                color: white;
                background-color: rgba(255, 255, 255, 0.15);
                margin-left: 0;
            }
            
            /* Adjust sidebar for mobile */
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
                top: var(--mobile-header-height);
                height: calc(100vh - var(--mobile-header-height));
                transition: transform 0.3s ease;
                z-index: 998;
            }
            
            .sidebar.show {
                transform: translateX(0);
            }
            
            .sidebar.collapsed {
                transform: translateX(-100%);
                width: 80px;
            }
            
            .sidebar.collapsed.show {
                transform: translateX(0);
            }
            
            /* Overlay when sidebar is open */
            .sidebar-overlay {
                position: fixed;
                top: var(--mobile-header-height);
                left: 0;
                right: 0;
                bottom: 0;
                background-color: rgba(0, 0, 0, 0.5);
                z-index: 997;
                opacity: 0;
                pointer-events: none;
                transition: opacity 0.3s ease;
            }
            
            .sidebar-overlay.show {
                opacity: 1;
                pointer-events: auto;
            }
            
            /* Adjust main content for mobile header */
            .main-content {
                margin-left: 0;
                margin-top: var(--mobile-header-height);
                padding: 16px;
                width: 100%;
            }
            
            /* Make dropdowns full width in mobile */
            .sidebar.collapsed .dropdown-menu {
                position: relative;
                left: 0;
                width: 100%;
                box-shadow: none;
                background-color: var(--sidebar-dropdown-bg);
            }
            
            /* Adjust footer for mobile */
            .sidebar-footer {
                padding-bottom: 20px;
            }
        }

        /* Larger mobile devices (tablets) */
        @media (min-width: 768px) and (max-width: 992px) {
            .sidebar {
                width: 240px;
            }
        }

        /* Small mobile devices */
        @media (max-width: 576px) {
            .sidebar {
                width: 260px;
            }
            
            .mobile-header {
                padding: 0 12px;
            }
            
            .mobile-header .logo-icon {
                width: 30px;
                height: 30px;
            }
            
            .mobile-header .sidebar-title {
                font-size: 16px;
            }
        }

        /* Hide mobile header on desktop */
        @media (min-width: 993px) {
            .mobile-header,
            .sidebar-overlay {
                display: none;
            }
        }