:root {
        --sidebar-width: 280px;
        --sidebar-collapsed-width: 80px;
        --sidebar-bg: #1a1d23;
        --sidebar-hover: #252a31;
        --sidebar-active: #2d3238;
        --primary-color: #0d6efd;
        --text-primary: #ffffff;
        --text-secondary: #8b92a7;
        --border-color: #2d3238;
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --topbar-height: 60px;
        --page-bg: #000000;
    }

    /* Global Page Styles */
    body {
        background-color: var(--page-bg) !important;
        color: var(--text-primary);
        margin: 0;
        padding: 0;
        min-height: 100vh;
    }

    html {
        background-color: var(--page-bg);
    }

    /* Main content wrapper */
    main {
        background-color: var(--page-bg);
        min-height: 100vh;
    }

    /* Desktop Top Bar */
    .desktop-topbar {
        position: fixed !important;
        top: 0 !important;
        left: var(--sidebar-width);
        right: 0;
        height: var(--topbar-height);
        background: transparent;
        z-index: 1000 !important;
        transition: background 0.3s ease, left 0.3s ease;
    }

    .desktop-topbar.scrolled {
        background: #000000 !important;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    }

    body.sidebar-collapsed .desktop-topbar {
        left: var(--sidebar-collapsed-width);
    }

    .desktop-topbar-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        padding: 0 2rem;
    }

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

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

    /* Coins Display */
    .coins-display {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        background: linear-gradient(135deg, #ffd700 0%, #ffed4e 100%);
        padding: 0.2rem 1rem;
        border-radius: 20px;
        font-weight: 600;
        color: #000000;
        box-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
        transition: all 0.3s ease;
        text-decoration: none;
        cursor: pointer;
    }

    .coins-display:hover {
        transform: translateY(-2px) scale(1.05);
        box-shadow: 0 4px 12px rgba(255, 215, 0, 0.5);
        color: #000000;
    }

    .coins-display:active {
        transform: translateY(0) scale(0.98);
    }

    .coins-display i {
        font-size: 1.25rem;
        color: #000000;
    }

    .coins-amount {
        font-size: 0.95rem;
        letter-spacing: 0.5px;
    }

    .coins-display-mobile {
        padding: 0.4rem 0.75rem;
        font-size: 0.85rem;
    }

    .coins-display-mobile i {
        font-size: 1.1rem;
    }

    .coins-display-mobile .coins-amount {
        font-size: 0.85rem;
    }

    .desktop-topbar .btn-link {
        color: var(--text-primary);
        text-decoration: none;
        font-weight: 500;
        padding: 0.5rem 1rem;
        transition: var(--transition);
    }

    .desktop-topbar .btn-link:hover {
        color: var(--primary-color);
        background: rgba(13, 110, 253, 0.1);
        border-radius: 8px;
    }

    .desktop-topbar .btn-primary {
        background: linear-gradient(135deg, var(--primary-color) 0%, #0a58ca 100%);
        border: none;
        border-radius: 8px;
        font-weight: 600;
        padding: 0.5rem 1.5rem;
        transition: var(--transition);
        box-shadow: 0 2px 8px rgba(13, 110, 253, 0.3);
    }

    .desktop-topbar .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(13, 110, 253, 0.5);
    }

    .desktop-topbar .dropdown-toggle {
        background: transparent;
        border: none;
        font-weight: 500;
    }

    .desktop-topbar .dropdown-toggle:hover {
        background: var(--sidebar-hover);
        border-radius: 8px;
    }

    .desktop-topbar .dropdown-menu {
        background: var(--sidebar-bg);
        border: 1px solid var(--border-color);
        margin-top: 0.5rem;
    }

    .desktop-topbar .dropdown-item {
        color: var(--text-primary);
        padding: 0.75rem 1.25rem;
        transition: var(--transition);
    }

    .desktop-topbar .dropdown-item:hover {
        background: var(--sidebar-hover);
        color: var(--text-primary);
    }

    /* Mobile Top Bar */
    .mobile-topbar {
        position: fixed !important;
        top: 0 !important;
        left: 0;
        right: 0;
        height: var(--topbar-height);
        background: transparent;
        z-index: 1000 !important;
        transition: background 0.3s ease;
    }

    .mobile-topbar.scrolled {
        background: #000000 !important;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    }

    .mobile-topbar-content {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        padding: 0 1rem;
        gap: 1rem;
    }

    .mobile-menu-btn {
        width: 44px;
        height: 44px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-primary);
        background: transparent;
        border: none;
        font-size: 1.5rem;
        transition: var(--transition);
        border-radius: 8px;
    }

    .mobile-menu-btn:hover,
    .mobile-menu-btn:focus {
        background: var(--sidebar-hover);
        color: var(--primary-color);
    }

    .mobile-brand {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        flex: 1;
    }

    .brand-icon-small {
        width: 160px;
        height: auto;
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
    }

    .brand-icon-small img {
        width: 100%;
        height: auto;
        object-fit: contain;
    }

    .brand-text-small {
        font-size: 1.125rem;
        font-weight: 700;
        color: var(--text-primary);
    }

    .mobile-topbar-actions {
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

    .mobile-topbar-actions .btn-link {
        color: var(--text-primary);
        text-decoration: none;
        font-size: 1.5rem;
        transition: var(--transition);
        border-radius: 8px;
    }

    .mobile-topbar-actions .btn-link:hover {
        color: var(--primary-color);
        background: rgba(13, 110, 253, 0.1);
    }

    .mobile-topbar-actions .btn-primary {
        background: linear-gradient(135deg, var(--primary-color) 0%, #0a58ca 100%);
        border: none;
        border-radius: 8px;
        font-weight: 600;
        padding: 0.5rem 1rem;
        transition: var(--transition);
        box-shadow: 0 2px 8px rgba(13, 110, 253, 0.3);
        font-size: 0.875rem;
    }

    .mobile-topbar-actions .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(13, 110, 253, 0.5);
    }

    .mobile-topbar-actions .dropdown-toggle {
        background: transparent;
        border: none;
    }

    .mobile-topbar-actions .dropdown-toggle:hover {
        background: var(--sidebar-hover);
    }

    .mobile-topbar-actions .dropdown-menu {
        background: var(--sidebar-bg);
        border: 1px solid var(--border-color);
        margin-top: 0.5rem;
    }

    .mobile-topbar-actions .dropdown-item {
        color: var(--text-primary);
        padding: 0.75rem 1.25rem;
        transition: var(--transition);
    }

    .mobile-topbar-actions .dropdown-item:hover {
        background: var(--sidebar-hover);
        color: var(--text-primary);
    }

    .mobile-action-btn {
        width: 40px;
        height: 40px;
        padding: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-secondary);
        background: transparent;
        border: none;
        font-size: 1.25rem;
        border-radius: 8px;
        transition: var(--transition);
        position: relative;
    }

    .mobile-action-btn:hover,
    .mobile-action-btn:focus {
        background: var(--sidebar-hover);
        color: var(--text-primary);
    }

    .mobile-action-btn .badge {
        position: absolute;
        top: 6px;
        right: 6px;
        width: 8px;
        height: 8px;
        background: #dc3545;
        border-radius: 50%;
        border: 2px solid var(--sidebar-bg);
    }

    /* Sidebar Overlay for Mobile */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1040;
        opacity: 0;
        transition: opacity 0.3s ease;
    }

    .sidebar-overlay.active {
        display: block;
        opacity: 1;
    }

    /* Main Sidebar */
    .sidebar {
        position: fixed !important;
        left: 0;
        top: 0;
        height: 100vh;
        width: var(--sidebar-width);
        background: var(--sidebar-bg);
        z-index: 1050;
        transition: var(--transition);
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3);
        display: flex;
        flex-direction: column;
    }

    .sidebar-content {
        display: flex;
        flex-direction: column;
        height: 100%;
        overflow: hidden;
    }

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

    .sidebar.collapsed .brand-text,
    .sidebar.collapsed .nav-text,
    .sidebar.collapsed .user-info,
    .sidebar.collapsed .user-actions,
    .sidebar.collapsed .nav-section-title,
    .sidebar.collapsed .badge-pill {
        opacity: 0;
        visibility: hidden;
        width: 0;
    }

    .sidebar.collapsed .brand-container {
        justify-content: center;
    }

    .sidebar.collapsed .user-profile {
        justify-content: center;
    }

    .sidebar.collapsed .nav-link {
        justify-content: center;
        padding-left: 1rem;
        padding-right: 1rem;
    }

    /* Toggle Buttons */
    .sidebar-toggle {
        position: absolute;
        right: -18px;
        top: 20px;
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--primary-color);
        border: 3px solid var(--sidebar-bg);
        color: white;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: var(--transition);
        z-index: 1051;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    }

    .sidebar-toggle:hover {
        transform: scale(1.1);
        background: #0b5ed7;
    }

    .sidebar-toggle i {
        transition: transform 0.3s ease;
    }

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

    .sidebar-mobile-toggle {
        position: fixed;
        bottom: 20px;
        right: 20px;
        width: 56px;
        height: 56px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.5rem;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        z-index: 1030;
    }

    /* Header */
    .sidebar-header {
        padding: 1.5rem 1rem;
        border-bottom: 1px solid var(--border-color);
    }

    .brand-container {
        display: flex;
        align-items: center;
        gap: 1rem;
        transition: var(--transition);
    }

    .brand-icon {
        width: 180px;
        height: 60px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
        overflow: hidden;
    }

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

    .brand-text {
        font-size: 1.25rem;
        font-weight: 700;
        color: var(--text-primary);
        white-space: nowrap;
        transition: var(--transition);
    }

    /* Navigation */
    .sidebar-nav {
        flex: 1;
        overflow-y: auto;
        overflow-x: hidden;
        padding: 1rem 0.5rem;
    }

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

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

    .sidebar-nav::-webkit-scrollbar-thumb {
        background: rgba(255, 255, 255, 0.1);
        border-radius: 3px;
    }

    .sidebar-nav::-webkit-scrollbar-thumb:hover {
        background: rgba(255, 255, 255, 0.2);
    }

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

    .nav-section-title {
        font-size: 0.75rem;
        text-transform: uppercase;
        font-weight: 600;
        color: var(--text-secondary);
        padding: 0.5rem 1rem;
        display: block;
        letter-spacing: 0.5px;
        transition: var(--transition);
    }

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

    .nav-item {
        margin-bottom: 0.25rem;
    }

    .nav-link {
        display: flex;
        align-items: center;
        padding: 0.75rem 1rem;
        color: var(--text-secondary);
        text-decoration: none;
        border-radius: 12px;
        transition: var(--transition);
        position: relative;
        overflow: hidden;
    }

    .nav-link::before {
        content: '';
        position: absolute;
        left: 0;
        top: 0;
        height: 100%;
        width: 4px;
        background: var(--primary-color);
        transform: scaleY(0);
        transition: transform 0.3s ease;
    }

    .nav-link:hover {
        background: var(--sidebar-hover);
        color: var(--text-primary);
        padding-left: 1.25rem;
    }

    .nav-link:hover::before {
        transform: scaleY(1);
    }

    .nav-link.active {
        background: var(--sidebar-active);
        color: var(--text-primary);
        box-shadow: 0 2px 8px rgba(13, 110, 253, 0.2);
    }

    .nav-link.active::before {
        transform: scaleY(1);
    }

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

    .nav-icon {
        font-size: 1.25rem;
        min-width: 24px;
        margin-right: 1rem;
        flex-shrink: 0;
        transition: var(--transition);
    }

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

    .badge-pill {
        font-size: 0.625rem;
        padding: 0.25rem 0.5rem;
        border-radius: 10px;
        font-weight: 600;
        transition: var(--transition);
    }

    /* Tooltip for collapsed state */
    .sidebar.collapsed .nav-link {
        position: relative;
    }

    .sidebar.collapsed .nav-link::after {
        content: attr(data-tooltip);
        position: absolute;
        left: calc(100% + 15px);
        top: 50%;
        transform: translateY(-50%);
        background: var(--sidebar-bg);
        color: var(--text-primary);
        padding: 0.5rem 1rem;
        border-radius: 8px;
        white-space: nowrap;
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        pointer-events: none;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        z-index: 1060;
    }

    .sidebar.collapsed .nav-link:hover::after {
        opacity: 1;
        visibility: visible;
    }

    /* Footer */
    .sidebar-footer {
        padding: 1rem;
        border-top: 1px solid var(--border-color);
        margin-top: auto;
    }

    .user-profile {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        transition: var(--transition);
    }

    .user-avatar {
        width: 44px;
        height: 44px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--primary-color), #0a58ca);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.25rem;
        color: white;
        flex-shrink: 0;
        overflow: hidden;
    }

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

    .user-info {
        flex: 1;
        min-width: 0;
        transition: var(--transition);
    }

    .user-name {
        font-size: 0.875rem;
        font-weight: 600;
        color: var(--text-primary);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .user-email {
        font-size: 0.75rem;
        color: var(--text-secondary);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .user-actions {
        transition: var(--transition);
    }

    .user-menu-btn {
        color: var(--text-secondary);
        padding: 0.25rem;
        line-height: 1;
    }

    .user-menu-btn:hover {
        color: var(--text-primary);
    }

    /* Mobile Responsive */
    @media (max-width: 991.98px) {
        .sidebar {
            transform: translateX(-100%);
            top: var(--topbar-height);
            height: calc(100vh - var(--topbar-height));
        }

        .sidebar.active {
            transform: translateX(0);
        }

        .sidebar-toggle {
            display: none !important;
        }

        /* Add padding to body for topbar */
        body {
            padding-top: var(--topbar-height);
            background-color: var(--page-bg) !important;
        }

        /* Sidebar overlay should also respect topbar */
        .sidebar-overlay {
            top: var(--topbar-height);
            height: calc(100vh - var(--topbar-height));
        }
    }

    @media (min-width: 992px) {
        .mobile-topbar {
            display: none !important;
        }

        .sidebar-mobile-toggle {
            display: none !important;
        }

        body {
            padding-left: var(--sidebar-width);
            padding-top: var(--topbar-height);
            transition: padding-left 0.3s ease;
            background-color: var(--page-bg) !important;
        }

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

        main {
            margin-top: 0;
        }
    }

    /* Smooth animations */
    @media (prefers-reduced-motion: reduce) {
        .sidebar,
        .sidebar-overlay,
        .nav-link,
        .sidebar-toggle {
            transition: none;
        }
    }

    /* Admin Dropdown Styles */
    .nav-link-dropdown {
        position: relative;
    }

    .nav-dropdown-icon {
        margin-left: auto;
        font-size: 0.875rem;
        transition: transform 0.3s ease;
    }

    .nav-link-dropdown[aria-expanded="true"] .nav-dropdown-icon {
        transform: rotate(180deg);
    }

    .sidebar.collapsed .nav-dropdown-icon {
        display: none;
    }

    .nav-submenu {
        padding-left: 0;
        margin-top: 0.25rem;
    }

    .nav-link-submenu {
        padding-left: 2.5rem !important;
        font-size: 0.9rem;
    }

    .nav-link-submenu .nav-icon {
        font-size: 1rem;
        margin-right: 0.75rem;
    }

    .nav-link-submenu:hover {
        padding-left: 2.75rem !important;
    }

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