/* Main Content Area */
        .main-content {
            margin-left: 260px;
            flex: 1;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

        .main-content.expanded {
            margin-left: 80px;
        }

        /* Header */
        .header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            padding: 16px 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .toggle-sidebar {
            background: none;
            border: none;
            font-size: 20px;
            cursor: pointer;
            color: var(--text);
            transition: var(--transition);
        }

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

        .header-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
        }

        .header-right {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .icon-btn {
            background: none;
            border: none;
            font-size: 18px;
            cursor: pointer;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }

        .icon-btn:hover {
            color: var(--primary);
            transform: scale(1.1);
        }

        .badge-notification {
            position: absolute;
            top: -8px;
            right: -8px;
            background: var(--danger);
            color: white;
            border-radius: 50%;
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            font-weight: 700;
        }

        .user-profile {
            display: flex;
            align-items: center;
            gap: 10px;
            cursor: pointer;
        }

        .avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 700;
            font-size: 16px;
        }

        .user-info {
            display: flex;
            flex-direction: column;
        }

        .user-name {
            font-size: 13px;
            font-weight: 600;
            color: var(--text);
        }

        .user-role {
            font-size: 11px;
            color: var(--text-light);
        }

        /* Content Area */
        .content {
            flex: 1;
            padding: 30px;
            overflow-y: auto;
        }

        /* Challenge Creation Tabs */
        .challenge-tabs {
            display: flex;
            gap: 8px;
            margin-bottom: 30px;
            background: var(--bg-card);
            padding: 15px;
            border-radius: 12px;
            border: 1px solid var(--border);
            overflow-x: auto;
        }

        .challenge-tab {
            padding: 10px 16px;
            border: 2px solid transparent;
            background: #2196f333;
            color: #007bff;
            border-radius: 8px;
            cursor: pointer;
            font-size: 13px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
        }

        .challenge-tab:hover {
            border-color: var(--primary);
            background: var(--primary-light);
        }

        .challenge-tab.active {
            background: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .challenge-tab-number {
            display: inline-block;
            width: 20px;
            height: 20px;
            background: rgba(255,255,255,0.3);
            border-radius: 50%;
            line-height: 20px;
            text-align: center;
            font-size: 11px;
            margin-right: 6px;
        }

        .challenge-tab.active .challenge-tab-number {
            background: rgba(255,255,255,0.6);
        }

        /* Form Sections */
        .form-section {
            background: linear-gradient(135deg, var(--bg-card), rgba(33,150,243,0.02));
            border: 2px solid rgba(33,150,243,0.1);
            border-radius: 16px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.08);
        }

        .form-section-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 25px;
            color: var(--text);
        }

        .form-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-bottom: 20px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text);
        }

        .form-input,
        .form-select,
        .form-textarea {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border);
            border-radius: 8px;
            font-size: 14px;
            font-family: inherit;
            transition: var(--transition);
            color: var(--text);
        }

        .form-input:focus,
        .form-select:focus,
        .form-textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--primary-light);
        }

        .form-textarea {
            resize: vertical;
            min-height: 100px;
        }

        .checkbox-group {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 15px;
        }

        .checkbox-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px;
            border: 1px solid var(--border);
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition);
        }

        .checkbox-item:hover {
            border-color: var(--primary);
            background: var(--primary-light);
        }

        .checkbox-item input {
            cursor: pointer;
        }

        .color-picker-group {
            display: flex;
            gap: 15px;
            align-items: flex-end;
        }

        .color-input {
            width: 60px;
            height: 40px;
            border: 2px solid var(--border);
            border-radius: 8px;
            cursor: pointer;
        }

        /* Leaderboard Styles */
        .leaderboard-container {
            background: linear-gradient(135deg, var(--bg-card), rgba(33,150,243,0.02));
            border: 2px solid rgba(33,150,243,0.1);
            border-radius: 16px;
            padding: 24px;
            margin-bottom: 30px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.08);
        }

        .leaderboard-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .leaderboard-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
        }

        .leaderboard-filters {
            display: flex;
            gap: 10px;
        }

        .filter-btn {
            padding: 8px 16px;
            border: 1px solid var(--border);
            background: white;
            border-radius: 20px;
            cursor: pointer;
            font-size: 13px;
            transition: var(--transition);
        }

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

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

        .leaderboard-item {
            display: flex;
            align-items: center;
            padding: 18px 20px;
            border: 2px solid transparent;
            border-radius: 12px;
            margin-bottom: 14px;
            transition: var(--transition);
            background: linear-gradient(135deg, rgba(255,255,255,0.9), rgba(33,150,243,0.05));
            box-shadow: 0 2px 8px rgba(0,0,0,0.08);
        }

        .leaderboard-item:hover {
            background: linear-gradient(135deg, rgba(255,255,255,1), rgba(33,150,243,0.1));
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(33,150,243,0.15);
        }

        .leaderboard-item.top-rank {
            background: linear-gradient(135deg, rgba(255,215,0,0.1), rgba(255,152,0,0.1));
            border-color: rgba(255,152,0,0.3);
        }

        .rank-medal {
            font-size: 24px;
            margin-right: 10px;
            min-width: 30px;
        }

        .rank-position {
            font-size: 18px;
            font-weight: 700;
            min-width: 50px;
            text-align: center;
            color: var(--primary);
            background: linear-gradient(135deg, rgba(33,150,243,0.15), rgba(255,152,0,0.1));
            width: 45px;
            height: 45px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 12px;
        }

        .rank-position.top-1 {
            background: linear-gradient(135deg, #FFD700, #FFA500);
            color: white;
            font-size: 20px;
            box-shadow: 0 4px 12px rgba(255,215,0,0.3);
        }

        .rank-position.top-2 {
            background: linear-gradient(135deg, #C0C0C0, #A9A9A9);
            color: white;
            box-shadow: 0 4px 12px rgba(192,192,192,0.3);
        }

        .rank-position.top-3 {
            background: linear-gradient(135deg, #CD7F32, #B8860B);
            color: white;
            box-shadow: 0 4px 12px rgba(205,127,50,0.3);
        }

        .leaderboard-avatar {
            width: 56px;
            height: 56px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 700;
            font-size: 18px;
            margin-right: 16px;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(33,150,243,0.2);
        }

        .leaderboard-avatar.gold {
            background: linear-gradient(135deg, #FFD700, #FFA500);
        }

        .leaderboard-avatar.silver {
            background: linear-gradient(135deg, #C0C0C0, #808080);
        }

        .leaderboard-avatar.bronze {
            background: linear-gradient(135deg, #CD7F32, #8B4513);
        }

        .leaderboard-details {
            display: flex;
            gap: 20px;
            font-size: 13px;
            color: var(--text-light);
        }

        .detail-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .detail-item-icon {
            font-size: 14px;
            color: var(--primary);
            font-weight: 600;
        }

        .leaderboard-stats {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-left: auto;
        }

        .stat-box {
            text-align: right;
            background: linear-gradient(135deg, rgba(33,150,243,0.1), rgba(255,152,0,0.05));
            padding: 10px 16px;
            border-radius: 8px;
            border-left: 3px solid var(--primary);
        }

        .stat-value {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
        }

        .stat-label {
            font-size: 11px;
            color: var(--text-light);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .rank-position {
            font-size: 18px;
            font-weight: 700;
            min-width: 50px;
            text-align: center;
            color: var(--primary);
        }

        .rank-position.top-1 {
            color: #FFD700;
            font-size: 24px;
        }

        .rank-position.top-2 {
            color: #C0C0C0;
        }

        .rank-position.top-3 {
            color: #CD7F32;
        }

        .rank-medal {
            font-size: 24px;
            margin-right: 10px;
            min-width: 30px;
        }

        .leaderboard-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 700;
            font-size: 18px;
            margin-right: 16px;
            flex-shrink: 0;
        }

        .leaderboard-info {
            flex: 1;
        }

        .leaderboard-name {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }

        .leaderboard-details {
            display: flex;
            gap: 20px;
            font-size: 13px;
            color: var(--text-light);
        }

        .leaderboard-stats {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-left: auto;
        }

        .stat-box {
            text-align: right;
        }

        .stat-value {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
        }

        .stat-label {
            font-size: 11px;
            color: var(--text-light);
            text-transform: uppercase;
        }

        .rank-change {
            font-size: 12px;
            font-weight: 700;
            padding: 6px 12px;
            border-radius: 20px;
            display: flex;
            align-items: center;
            gap: 6px;
            letter-spacing: 0.5px;
        }

        .rank-change.up {
            background: linear-gradient(135deg, rgba(76, 175, 80, 0.2), rgba(76, 175, 80, 0.1));
            color: var(--success);
            border: 1px solid rgba(76, 175, 80, 0.2);
        }

        .rank-change.down {
            background: linear-gradient(135deg, rgba(244, 67, 54, 0.2), rgba(244, 67, 54, 0.1));
            color: var(--danger);
            border: 1px solid rgba(244, 67, 54, 0.2);
        }

        .rank-change.neutral {
            background: linear-gradient(135deg, rgba(153, 153, 153, 0.2), rgba(153, 153, 153, 0.1));
            color: var(--text-light);
            border: 1px solid rgba(153, 153, 153, 0.2);
        }

        /* Buttons */
        .btn {
            padding: 10px 20px;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

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

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

        .btn-secondary {
            background: var(--border);
            color: var(--text);
        }

        .btn-secondary:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

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

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

        .btn-small {
            padding: 6px 12px;
            font-size: 12px;
        }

        .btn-icon {
            background: none;
            border: none;
            font-size: 16px;
            cursor: pointer;
            color: var(--text-light);
            transition: var(--transition);
            padding: 8px;
        }

        .btn-icon:hover {
            color: var(--primary);
        }

        /* Modal */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0,0,0,0.5);
            z-index: 2000;
            align-items: center;
            justify-content: center;
        }

        .modal.active {
            display: flex;
        }

        .modal-content {
            background: var(--bg-card);
            border-radius: 12px;
            max-width: 600px;
            width: 90%;
            max-height: 80vh;
            overflow-y: auto;
            box-shadow: var(--shadow-lg);
            animation: slideUp 0.3s ease;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .modal-header {
            padding: 20px;
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .modal-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
        }

        .modal-close {
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text-light);
        }

        .modal-body {
            padding: 20px;
        }

        .modal-footer {
            padding: 20px;
            border-top: 1px solid var(--border);
            display: flex;
            gap: 10px;
            justify-content: flex-end;
        }

        /* Badge */
        .badge {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 11px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }

        .badge-primary {
            background: linear-gradient(135deg, var(--primary-light), rgba(33,150,243,0.2));
            color: var(--primary);
            border: 1px solid rgba(33,150,243,0.2);
        }

        .badge-success {
            background: linear-gradient(135deg, rgba(76, 175, 80, 0.2), rgba(76, 175, 80, 0.1));
            color: var(--success);
            border: 1px solid rgba(76, 175, 80, 0.2);
        }

        .badge-warning {
            background: linear-gradient(135deg, rgba(255, 193, 7, 0.2), rgba(255, 193, 7, 0.1));
            color: var(--warning);
            border: 1px solid rgba(255, 193, 7, 0.2);
        }

        .badge-danger {
            background: linear-gradient(135deg, rgba(244, 67, 54, 0.2), rgba(244, 67, 54, 0.1));
            color: var(--danger);
            border: 1px solid rgba(244, 67, 54, 0.2);
        }

        .badge-gold {
            background: linear-gradient(135deg, #FFD700, #FFA500);
            color: white;
            border: 1px solid rgba(255,152,0,0.3);
        }

        .badge-silver {
            background: linear-gradient(135deg, #C0C0C0, #808080);
            color: white;
            border: 1px solid rgba(192,192,192,0.3);
        }

        .badge-bronze {
            background: linear-gradient(135deg, #CD7F32, #8B4513);
            color: white;
            border: 1px solid rgba(205,127,50,0.3);
        }

        /* Status Badge */
        .status-badge {
            display: inline-block;
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }

        .status-active {
            background: rgba(76, 175, 80, 0.15);
            color: var(--success);
        }

        .status-pending {
            background: rgba(255, 193, 7, 0.15);
            color: var(--warning);
        }

        .status-completed {
            background: rgba(33, 150, 243, 0.15);
            color: var(--primary);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .search-bar {
                min-width: 150px;
            }

            .sidebar {
                width: 220px;
            }

            .main-content {
                margin-left: 220px;
            }

            .form-row {
                grid-template-columns: 1fr;
            }

            .leaderboard-stats {
                gap: 10px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                width: 80px;
            }

            .logo-text,
            .nav-label,
            .nav-text {
                display: none !important;
            }

            .main-content {
                margin-left: 80px;
            }

            .header {
                padding: 12px 20px;
                flex-wrap: wrap;
                gap: 12px;
            }

            .search-bar {
                display: none;
            }

            .content {
                padding: 20px;
            }

            .form-section {
                padding: 20px;
            }

            .challenge-tabs {
                overflow-x: auto;
            }

            .leaderboard-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }

            .leaderboard-stats {
                margin-left: 0;
                width: 100%;
            }

            .modal-content {
                width: 95%;
            }
        }

        @media (max-width: 480px) {
            .form-section {
                padding: 15px;
            }

            .challenge-tabs {
                gap: 4px;
            }

            .challenge-tab {
                padding: 8px 10px;
                font-size: 11px;
            }

            .challenge-tab-number {
                width: 16px;
                height: 16px;
                font-size: 10px;
            }

            .leaderboard-item {
                padding: 12px;
            }

            .leaderboard-avatar {
                width: 40px;
                height: 40px;
                font-size: 14px;
                margin-right: 10px;
            }

            .leaderboard-name {
                font-size: 14px;
            }

            .leaderboard-details {
                gap: 10px;
                font-size: 11px;
            }

            .stat-value {
                font-size: 14px;
            }
        }

        /* Utility Classes */
        .flex-between {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .mt-20 {
            margin-top: 20px;
        }

        .mb-20 {
            margin-bottom: 20px;
        }

        .mb-30 {
            margin-bottom: 30px;
        }

        .hidden {
            display: none !important;
        }

        .active-view {
            display: block;
        }

        .inactive-view {
            display: none;
        }

        .progress-bar {
            width: 100%;
            height: 10px;
            background: linear-gradient(90deg, rgba(227,242,253,0.5), rgba(255,224,178,0.3));
            border-radius: 10px;
            overflow: hidden;
            box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #007bff, #0d6efd);
            border-radius: 10px;
            box-shadow: 0 2px 8px rgba(33,150,243,0.4);
            position: relative;
        }

        .progress-fill::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
            border-radius: 10px;
            animation: shimmer 2s infinite;
        }

        @keyframes shimmer {
            0% { transform: translateX(-100%); }
            100% { transform: translateX(100%); }
        }

        .grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }

        .stat-card {
            background: linear-gradient(135deg, var(--bg-card), rgba(33,150,243,0.03));
            border: 2px solid rgba(33,150,243,0.1);
            border-radius: 16px;
            padding: 24px 20px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.08);
            text-align: center;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(33,150,243,0.1), transparent);
            border-radius: 50%;
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(33,150,243,0.15);
            border-color: rgba(33,150,243,0.2);
        }

        .stat-card-icon {
            font-size: 40px;
            margin-bottom: 12px;
            display: block;
        }

        .stat-card-value {
            font-size: 32px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 8px;
        }

        .stat-card-label {
            font-size: 12px;
            color: var(--text-light);
            text-transform: uppercase;
            letter-spacing: 1px;
            font-weight: 600;
        }

        /* Enhanced Table Row Hover Effects */
        #challenges-type table tbody tr {
            transition: all 0.2s ease;
        }

        #challenges-type table tbody tr:hover {
            background: linear-gradient(90deg, rgba(37, 99, 235, 0.03), rgba(6, 182, 212, 0.02));
            transform: translateX(2px);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }

        /* Enhanced Action Buttons Hover */
        #challenges-type .action-buttons .btn-icon:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }

        #challenges-type .action-buttons .action-view:hover {
            background: rgba(37, 99, 235, 0.2) !important;
            color: var(--primary) !important;
        }

        #challenges-type .action-buttons .action-edit:hover {
            background: rgba(245, 158, 11, 0.2) !important;
            color: #f59e0b !important;
        }

        #challenges-type .action-buttons .action-delete:hover {
            background: rgba(239, 68, 68, 0.2) !important;
            color: #ef4444 !important;
        }

        /* Summary Cards Hover */
        #challenges-type > div > div[style*="grid-template-columns"] > div:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }
    .active-challenge-dates
    {
        display: flex;
    justify-content: flex-start;
    align-items: baseline;
    gap: 20px;
    }