:root {
            --primary: #db10ee;
            --primary-dark: #006494;
            --primary-light: #a50eb9;
            --white: #ffffff;
            --gray-50: #f8fafc;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-300: #cbd5e1;
            --gray-400: #94a3b8;
            --gray-500: #64748b;
            --gray-600: #475569;
            --gray-700: #334155;
            --gray-800: #1e293b;
            --gray-900: #0f172a;
            --black: #000000;
            --success: #10b981;
            --warning: #f59e0b;
            --error: #ef4444;
            --info: #3b82f6;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            --radius-sm: 4px;
            --radius: 8px;
            --radius-lg: 12px;
            --radius-xl: 16px;
            --radius-full: 9999px;
            --space-xs: 4px;
            --space-sm: 8px;
            --space-md: 16px;
            --space-lg: 24px;
            --space-xl: 32px;
            --space-2xl: 48px;
            --space-3xl: 64px;
            --text-xs: 0.75rem;
            --text-sm: 0.875rem;
            --text-base: 1rem;
            --text-lg: 1.125rem;
            --text-xl: 1.25rem;
            --text-2xl: 1.5rem;
            --text-3xl: 1.875rem;
            --text-4xl: 2.25rem;
            --text-5xl: 3rem;
            --text-6xl: 3.75rem;
            --bg-primary: var(--white);
            --bg-secondary: var(--gray-50);
            --bg-tertiary: var(--gray-100);
            --text-primary: var(--gray-900);
            --text-secondary: var(--gray-600);
            --border-color: var(--gray-200);
        }

        .dark-mode {
            --bg-primary: var(--gray-900);
            --bg-secondary: var(--gray-800);
            --bg-tertiary: var(--gray-700);
            --text-primary: var(--white);
            --text-secondary: var(--gray-300);
            --border-color: var(--gray-600);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Poppins', sans-serif;
            color: var(--text-primary);
            line-height: 1.5;
            background-color: var(--bg-primary);
            transition: background-color 0.3s ease, color 0.3s ease;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space-md);
        }


        header {
            background-color: var(--bg-primary);
            position: fixed;
            width: 100%;
            z-index: 1000;
            transition: all 0.3s ease;
            padding: var(--space-sm) 0;
            top: 0;
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--border-color);
        }

        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 60px;
        }

        .main-nav {
            display: flex;
            height: 100%;
        }

        .nav-list {
            display: flex;
            list-style: none;
            align-items: center;
            gap: var(--space-md);
            margin: 0;
            padding: 0;
            height: 100%;
        }

        .nav-item {
            position: relative;
            height: 100%;
            display: flex;
            align-items: center;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
            padding: 0 var(--space-md);
            color: var(--text-primary);
            text-decoration: none;
            transition: all 0.3s ease;
            font-weight: 500;
            height: 100%;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--primary);
            box-shadow: inset 0 -3px 0 var(--primary);
        }

        .nav-link i {
            font-size: var(--text-lg);
        }

        .nav-avatar {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid var(--primary-light);
        }

        .dropdown {
            position: relative;
            height: 100%;
        }

        .dropdown-toggle {
            display: flex;
            align-items: center;
            gap: var(--space-xs);
            background: none;
            border: none;
            cursor: pointer;
            padding: 0 var(--space-md);
            height: 100%;
        }

        .dropdown-icon {
            font-size: var(--text-xs);
            transition: transform 0.3s ease;
        }

        .dropdown-menu {
            position: absolute;
            right: 0;
            top: 100%;
            background-color: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            box-shadow: var(--shadow-md);
            min-width: 180px;
            z-index: 1000;
            display: none;
            padding: var(--space-sm) 0;
        }

        .dropdown:hover .dropdown-menu {
            display: block;
        }

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

        .dropdown-item {
            display: block;
            padding: var(--space-sm) var(--space-md);
            color: var(--text-primary);
            text-decoration: none;
            transition: all 0.2s ease;
        }

        .dropdown-item:hover {
            background-color: var(--bg-tertiary);
            color: var(--primary);
        }

        .theme-toggle {
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: var(--text-lg);
            cursor: pointer;
            padding: 0 var(--space-md);
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            align-items: center;
        }

        .theme-toggle:hover {
            color: var(--primary);
        }

        .main-content {
            padding: var(--space-3xl) 0;
            margin-top: 60px;
        }

        @media (max-width: 768px) {
            .nav-list {
                gap: var(--space-sm);
            }

            .nav-link {
                padding: 0 var(--space-sm);
            }

            .dropdown-toggle span {
                display: none;
            }
        }

        .logo {
            font-size: var(--text-2xl);
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: var(--space-sm);
        }

        .logo-icon {
            font-size: var(--text-3xl);
        }

        .main-content {
            padding: var(--space-3xl) 0;
            margin-top: 80px;
        }

        .page-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: var(--space-2xl);
        }

        .page-title {
            font-size: var(--text-3xl);
        }

        .page-actions {
            display: flex;
            gap: var(--space-sm);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: var(--space-sm) var(--space-lg);
            border-radius: var(--radius-full);
            font-weight: 600;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
            position: relative;
            overflow: hidden;
            gap: var(--space-xs);
            min-height: 44px;
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--white);
            box-shadow: var(--shadow);
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-outline {
            border: 2px solid var(--primary);
            color: var(--primary);
            background-color: transparent;
        }

        .btn-outline:hover {
            background-color: var(--primary);
            color: var(--white);
        }

        .filters {
            display: flex;
            flex-wrap: wrap;
            gap: var(--space-sm);
            margin-bottom: var(--space-xl);
        }

        .filter-item {
            position: relative;
        }

        .filter-select {
            padding: var(--space-sm) var(--space-lg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-full);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .filter-select:hover {
            border-color: var(--primary);
        }

        .filter-select.active {
            background-color: var(--primary);
            color: var(--white);
            border-color: var(--primary);
        }

        .search-box {
            position: relative;
            flex: 1;
            max-width: 400px;
        }

        .search-input {
            width: 100%;
            padding: var(--space-sm) var(--space-xl) var(--space-sm) var(--space-lg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-full);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            transition: all 0.3s ease;
        }

        .search-input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 166, 251, 0.1);
        }

        .search-icon {
            position: absolute;
            right: var(--space-md);
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-secondary);
        }

        .groups-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: var(--space-xl);
        }

        .group-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
            border: 1px solid var(--border-color);
        }

        .group-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }

        .group-image {
            height: 160px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .group-image::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.7));
        }

        .group-category {
            position: absolute;
            top: var(--space-md);
            left: var(--space-md);
            background-color: var(--primary);
            color: var(--white);
            padding: var(--space-xs) var(--space-sm);
            border-radius: var(--radius-full);
            font-size: var(--text-xs);
            font-weight: 600;
            z-index: 1;
        }

        .group-body {
            padding: var(--space-lg);
            background-color: var(--bg-primary);
        }

        .group-title {
            font-size: var(--text-lg);
            margin-bottom: var(--space-sm);
        }

        .group-description {
            color: var(--text-secondary);
            margin-bottom: var(--space-md);
            font-size: var(--text-sm);
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .group-meta {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            color: var(--text-secondary);
            font-size: var(--text-sm);
            margin-bottom: var(--space-md);
        }

        .group-meta i {
            margin-right: var(--space-xs);
        }

        .group-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: var(--space-md);
            border-top: 1px solid var(--border-color);
        }

        .group-members {
            display: flex;
            align-items: center;
        }

        .group-member-avatar {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            margin-left: -8px;
        }

        .group-member-avatar:first-child {
            margin-left: 0;
        }

        .group-member-count {
            margin-left: var(--space-xs);
            font-size: var(--text-sm);
        }

        .modal {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }

        .modal.active {
            opacity: 1;
            visibility: visible;
        }

        .modal-content {
            background-color: var(--bg-primary);
            border-radius: var(--radius-lg);
            padding: var(--space-xl);
            max-width: 600px;
            width: 90%;
            max-height: 90vh;
            overflow-y: auto;
            box-shadow: var(--shadow-xl);
            transform: translateY(-20px);
            transition: transform 0.3s ease;
        }

        .modal.active .modal-content {
            transform: translateY(0);
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: var(--space-lg);
        }

        .modal-close {
            background: none;
            border: none;
            font-size: var(--text-xl);
            cursor: pointer;
            color: var(--text-secondary);
            transition: color 0.3s ease;
        }

        .modal-close:hover {
            color: var(--text-primary);
        }

        .modal-footer {
            display: flex;
            justify-content: flex-end;
            gap: var(--space-md);
            margin-top: var(--space-xl);
        }

        .form-group {
            margin-bottom: var(--space-lg);
        }

        .form-label {
            display: block;
            margin-bottom: var(--space-xs);
            font-weight: 500;
        }

        .form-control {
            width: 100%;
            padding: var(--space-md);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            transition: all 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 166, 251, 0.1);
        }

        .form-textarea {
            min-height: 120px;
            resize: vertical;
        }

        @media (max-width: 992px) {
            .page-header {
                flex-direction: column;
                align-items: flex-start;
                gap: var(--space-md);
            }

            .page-actions {
                width: 100%;
                justify-content: flex-end;
            }
        }

        @media (max-width: 768px) {
            .groups-container {
                grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            }
        }

        @media (max-width: 576px) {
            .main-content {
                padding: var(--space-2xl) 0;
            }

            .filters {
                flex-direction: column;
                align-items: flex-start;
            }

            .search-box {
                max-width: 100%;
            }
        }