* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f0f2f5;
            color: #1c1e21;
        }
        
        .container {
            display: flex;
            min-height: 100vh;
        }
        
        /* Sidebar Styles */
        .sidebar {
            width: 280px;
            background-color: #fff;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            padding: 20px 0;
            position: fixed;
            height: 100vh;
            overflow-y: auto;
        }
        
        .logo {
            display: flex;
            align-items: center;
            padding: 0 20px 20px;
            border-bottom: 1px solid #e4e6eb;
            margin-bottom: 15px;
        }
        
        .logo i {
            color: #1877f2;
            font-size: 40px;
            margin-right: 10px;
        }
        
        .logo h1 {
            font-size: 24px;
            color: #1877f2;
        }
        
        .menu-item {
            display: flex;
            align-items: center;
            padding: 12px 20px;
            margin: 5px 0;
            cursor: pointer;
            border-radius: 8px;
            transition: background-color 0.2s;
        }
        
        .menu-item:hover {
            background-color: #f0f2f5;
        }
        
        .menu-item.active {
            background-color: #e7f3ff;
            color: #1877f2;
            font-weight: 600;
        }
        
        .menu-item i {
            font-size: 20px;
            margin-right: 12px;
            width: 24px;
            text-align: center;
        }
        
        /* Main Content Styles */
        .main-content {
            flex: 1;
            margin-left: 280px;
            padding: 20px;
        }
        
        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: #fff;
            padding: 15px 20px;
            border-radius: 10px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            margin-bottom: 20px;
        }
        
        .search-bar {
            display: flex;
            align-items: center;
            background-color: #f0f2f5;
            border-radius: 20px;
            padding: 8px 15px;
            width: 300px;
        }
        
        .search-bar i {
            color: #65676b;
            margin-right: 10px;
        }
        
        .search-bar input {
            border: none;
            background: transparent;
            outline: none;
            width: 100%;
            font-size: 15px;
        }
        
        .user-actions {
            display: flex;
            align-items: center;
        }
        
        .user-actions .profile {
            display: flex;
            align-items: center;
            margin-left: 15px;
            cursor: pointer;
        }
        
        .user-actions .profile img {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 10px;
        }
        
        /* Content Tabs */
        .content-tabs {
            display: flex;
            background-color: #fff;
            border-radius: 10px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            margin-bottom: 20px;
            overflow: hidden;
        }
        
        .tab {
            flex: 1;
            text-align: center;
            padding: 15px;
            cursor: pointer;
            transition: background-color 0.2s;
        }
        
        .tab.active {
            background-color: #e7f3ff;
            color: #1877f2;
            font-weight: 600;
            border-bottom: 3px solid #1877f2;
        }
        
        .tab:hover:not(.active) {
            background-color: #f0f2f5;
        }
        
        /* Content Area */
        .content-area {
            background-color: #fff;
            border-radius: 10px;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            padding: 20px;
        }
        
        .section-title {
            font-size: 20px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #e4e6eb;
        }
        
        /* User Cards */
        .users-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
        }
        
        .user-card {
            background-color: #fff;
            border-radius: 10px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            transition: transform 0.2s;
        }
        
        .user-card:hover {
            transform: translateY(-5px);
        }
        
        .user-cover {
            height: 80px;
            background: linear-gradient(135deg, #1877f2, #42b883);
        }
        
        .user-info {
            padding: 15px;
            text-align: center;
            position: relative;
        }
        
        .user-avatar {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            object-fit: cover;
            border: 4px solid #fff;
            margin-top: -50px;
            background-color: #fff;
        }
        
        .user-name {
            font-size: 18px;
            font-weight: 600;
            margin: 10px 0 5px;
        }
        
        .user-mutual {
            color: #65676b;
            font-size: 14px;
            margin-bottom: 15px;
        }
        
        .user-actions {
            display: flex;
            gap: 8px;
        }
        
        .btn {
            flex: 1;
            padding: 8px 0;
            border: none;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.2s;
        }
        
        .btn-primary {
            background-color: #1877f2;
            color: white;
        }
        
        .btn-primary:hover {
            background-color: #166fe5;
        }
        
        .btn-secondary {
            background-color: #e4e6eb;
            color: #1c1e21;
        }
        
        .btn-secondary:hover {
            background-color: #d8dadf;
        }
        
        .btn-outline {
            background-color: transparent;
            border: 1px solid #1877f2;
            color: #1877f2;
        }
        
        .btn-outline:hover {
            background-color: #e7f3ff;
        }
        
        /* Friend Requests */
        .requests-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        
        .request-item {
            display: flex;
            align-items: center;
            padding: 15px;
            border-radius: 10px;
            background-color: #f7f8fa;
            transition: background-color 0.2s;
        }
        
        .request-item:hover {
            background-color: #f0f2f5;
        }
        
        .request-avatar {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 15px;
        }
        
        .request-info {
            flex: 1;
        }
        
        .request-name {
            font-weight: 600;
            margin-bottom: 5px;
        }
        
        .request-meta {
            color: #65676b;
            font-size: 14px;
        }
        
        .request-actions {
            display: flex;
            gap: 10px;
        }
        
        .btn-success {
            background-color: #42b883;
            color: white;
        }
        
        .btn-success:hover {
            background-color: #3aa876;
        }
        
        .btn-danger {
            background-color: #fa383e;
            color: white;
        }
        
        .btn-danger:hover {
            background-color: #f02828;
        }
        
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: #65676b;
        }
        
        .empty-state i {
            font-size: 50px;
            margin-bottom: 15px;
            color: #bcc0c4;
        }
        
        /* Hidden content */
        .content-section {
            display: none;
        }
        
        .content-section.active {
            display: block;
        }