diff --git a/public/components.js b/public/components.js
index cc73745..50ee30a 100644
--- a/public/components.js
+++ b/public/components.js
@@ -2579,10 +2579,13 @@ class TopologyGraphComponent extends Component {
                 this.simulation.alpha(0.3).restart();
             }
 
-            // Add click handlers for node selection
+            // Add click handlers for node selection and member card overlay
             node.on('click', (event, d) => {
                 this.viewModel.selectNode(d.id);
                 this.updateSelection(d.id);
+                
+                // Show member card overlay
+                this.showMemberCardOverlay(d);
             });
 
             // Add hover effects
@@ -2820,6 +2823,52 @@ class TopologyGraphComponent extends Component {
         container.innerHTML = '<div class="no-data"><div>No cluster members found</div></div>';
     }
 
+    showMemberCardOverlay(nodeData) {
+        // Create overlay container if it doesn't exist
+        let overlayContainer = document.getElementById('member-card-overlay');
+        if (!overlayContainer) {
+            overlayContainer = document.createElement('div');
+            overlayContainer.id = 'member-card-overlay';
+            overlayContainer.className = 'member-card-overlay';
+            document.body.appendChild(overlayContainer);
+        }
+
+        // Create and show the overlay component
+        if (!this.memberOverlayComponent) {
+            const overlayVM = new ViewModel();
+            this.memberOverlayComponent = new MemberCardOverlayComponent(overlayContainer, overlayVM, this.eventBus);
+            this.memberOverlayComponent.mount();
+        }
+
+        // Convert node data to member data format
+        const memberData = {
+            ip: nodeData.ip,
+            hostname: nodeData.hostname,
+            status: this.normalizeStatus(nodeData.status),
+            latency: nodeData.latency,
+            labels: nodeData.resources || {}
+        };
+
+        this.memberOverlayComponent.show(memberData);
+    }
+
+    // Normalize status from topology format to member card format
+    normalizeStatus(status) {
+        if (!status) return 'unknown';
+        
+        const normalized = status.toLowerCase();
+        switch (normalized) {
+            case 'active':
+                return 'active';
+            case 'inactive':
+                return 'inactive';
+            case 'dead':
+                return 'offline';
+            default:
+                return 'unknown';
+        }
+    }
+
     // Override render method to display the graph
     render() {
         console.log('TopologyGraphComponent: render called');
@@ -2839,4 +2888,175 @@ class TopologyGraphComponent extends Component {
     }
 
 
+}
+
+// Member Card Overlay Component for displaying member details in topology view
+class MemberCardOverlayComponent extends Component {
+    constructor(container, viewModel, eventBus) {
+        super(container, viewModel, eventBus);
+        this.isVisible = false;
+        this.currentMember = null;
+    }
+
+    mount() {
+        super.mount();
+        this.setupEventListeners();
+    }
+
+    setupEventListeners() {
+        // Close overlay when clicking outside or pressing escape
+        this.addEventListener(document, 'click', (e) => {
+            if (this.isVisible && !this.container.contains(e.target)) {
+                this.hide();
+            }
+        });
+
+        this.addEventListener(document, 'keydown', (e) => {
+            if (e.key === 'Escape' && this.isVisible) {
+                this.hide();
+            }
+        });
+    }
+
+    show(memberData) {
+        this.currentMember = memberData;
+        this.isVisible = true;
+        
+        const memberCardHTML = this.renderMemberCard(memberData);
+        this.setHTML('', memberCardHTML);
+        
+        // Add visible class for animation
+        setTimeout(() => {
+            this.container.classList.add('visible');
+        }, 10);
+        
+        // Setup member card interactions
+        this.setupMemberCardInteractions();
+    }
+
+
+
+    hide() {
+        this.isVisible = false;
+        this.container.classList.remove('visible');
+        this.currentMember = null;
+    }
+
+    renderMemberCard(member) {
+        const statusClass = member.status === 'active' ? 'status-online' : 
+                          member.status === 'inactive' ? 'status-inactive' : 'status-offline';
+        const statusText = member.status === 'active' ? 'Online' : 
+                          member.status === 'inactive' ? 'Inactive' : 
+                          member.status === 'offline' ? 'Offline' : 'Unknown';
+        const statusIcon = member.status === 'active' ? '🟢' : 
+                          member.status === 'inactive' ? '🟠' : '🔴';
+        
+        return `
+            <div class="member-overlay-content">
+                <div class="member-overlay-header">
+                    <div class="member-overlay-title">
+                        <h3>Member Details</h3>
+                    </div>
+                    <button class="member-overlay-close" aria-label="Close">
+                        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
+                            <path d="M18 6L6 18M6 6l12 12"/>
+                        </svg>
+                    </button>
+                </div>
+                
+                <div class="member-overlay-body">
+                    <div class="member-card expanded" data-member-ip="${member.ip}">
+                        <div class="member-header">
+                            <div class="member-info">
+                                <div class="member-name">${member.hostname || 'Unknown Device'}</div>
+                                <div class="member-ip">${member.ip || 'No IP'}</div>
+                                <div class="member-status ${statusClass}">
+                                    ${statusIcon} ${statusText}
+                                </div>
+                                <div class="member-latency">
+                                    <span class="latency-label">Latency:</span>
+                                    <span class="latency-value">${member.latency ? member.latency + 'ms' : 'N/A'}</span>
+                                </div>
+                                ${member.labels && Object.keys(member.labels).length ? `
+                                <div class="member-labels">
+                                    ${Object.entries(member.labels).map(([key, value]) => `<span class="label-chip">${key}: ${value}</span>`).join('')}
+                                </div>
+                                ` : ''}
+                            </div>
+                        </div>
+                        <div class="member-details">
+                            <div class="loading-details">Loading detailed information...</div>
+                        </div>
+                    </div>
+                </div>
+            </div>
+        `;
+    }
+
+    setupMemberCardInteractions() {
+        // Close button
+        const closeBtn = this.findElement('.member-overlay-close');
+        if (closeBtn) {
+            this.addEventListener(closeBtn, 'click', () => {
+                this.hide();
+            });
+        }
+
+        // Setup member card expansion - automatically expand when shown
+        setTimeout(async () => {
+            const memberCard = this.findElement('.member-card');
+            if (memberCard) {
+                const memberDetails = memberCard.querySelector('.member-details');
+                const memberIp = memberCard.dataset.memberIp;
+
+                // Automatically expand the card to show details
+                await this.expandCard(memberCard, memberIp, memberDetails);
+            }
+        }, 100);
+    }
+
+    async expandCard(card, memberIp, memberDetails) {
+        try {
+            // Create node details view model and component
+            const nodeDetailsVM = new NodeDetailsViewModel();
+            const nodeDetailsComponent = new NodeDetailsComponent(memberDetails, nodeDetailsVM, this.eventBus);
+            
+            // Load node details
+            await nodeDetailsVM.loadNodeDetails(memberIp);
+            
+            // Mount the component
+            nodeDetailsComponent.mount();
+            
+            // Update UI
+            card.classList.add('expanded');
+            const expandIcon = card.querySelector('.expand-icon');
+            if (expandIcon) {
+                expandIcon.classList.add('expanded');
+            }
+            
+        } catch (error) {
+            console.error('Failed to expand card:', error);
+            memberDetails.innerHTML = `
+                <div class="error">
+                    <strong>Error loading node details:</strong><br>
+                    ${error.message}
+                </div>
+            `;
+        }
+    }
+
+    collapseCard(card, expandIcon) {
+        card.classList.remove('expanded');
+        if (expandIcon) {
+            expandIcon.classList.remove('expanded');
+        }
+        
+        // Reset member details to loading state
+        const memberDetails = card.querySelector('.member-details');
+        if (memberDetails) {
+            memberDetails.innerHTML = '<div class="loading-details">Loading detailed information...</div>';
+        }
+    }
+
+
 }
\ No newline at end of file
diff --git a/public/styles.css b/public/styles.css
index 9f06172..5310f13 100644
--- a/public/styles.css
+++ b/public/styles.css
@@ -2383,6 +2383,201 @@ p {
     height: 100%;
 }
 
+/* Member Card Overlay Styles */
+.member-card-overlay {
+    position: fixed;
+    top: 0;
+    left: 0;
+    right: 0;
+    bottom: 0;
+    background: rgba(0, 0, 0, 0.7);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    z-index: 10000;
+    opacity: 0;
+    visibility: hidden;
+    transition: all 0.3s ease;
+}
+
+.member-card-overlay.visible {
+    opacity: 1;
+    visibility: visible;
+}
+
+.member-overlay-content {
+    background: linear-gradient(135deg, #1c2a38 0%, #283746 50%, #1a252f 100%);
+    border: 1px solid rgba(255, 255, 255, 0.12);
+    border-radius: 16px;
+    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
+    max-width: 800px;
+    width: 90%;
+    max-height: 90vh;
+    overflow: hidden;
+    transform: scale(0.9) translateY(20px);
+    transition: all 0.3s ease;
+}
+
+.member-card-overlay.visible .member-overlay-content {
+    transform: scale(1) translateY(0);
+}
+
+.member-overlay-header {
+    display: flex;
+    align-items: flex-start;
+    justify-content: space-between;
+    padding: 24px 24px 16px;
+    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
+}
+
+.member-overlay-title h3 {
+    margin: 0 0 8px 0;
+    font-size: 1.5rem;
+    font-weight: 600;
+    color: #ecf0f1;
+}
+
+.member-overlay-subtitle {
+    font-size: 1rem;
+    color: rgba(255, 255, 255, 0.7);
+    font-family: 'Courier New', monospace;
+}
+
+.member-overlay-close {
+    background: none;
+    border: none;
+    color: rgba(255, 255, 255, 0.6);
+    cursor: pointer;
+    padding: 8px;
+    border-radius: 8px;
+    transition: all 0.2s ease;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+}
+
+.member-overlay-close:hover {
+    background: rgba(255, 255, 255, 0.1);
+    color: rgba(255, 255, 255, 0.9);
+}
+
+.member-overlay-close svg {
+    width: 20px;
+    height: 20px;
+}
+
+.member-overlay-body {
+    padding: 24px;
+}
+
+.member-overlay-section {
+    margin-bottom: 24px;
+}
+
+/* Member card container within overlay */
+.member-overlay-body {
+    padding: 0;
+    overflow: auto;
+    max-height: calc(90vh - 120px); /* Account for header */
+}
+
+/* Ensure member cards render properly in overlay */
+.member-overlay-body .member-card {
+    margin: 0;
+    border-radius: 0;
+    border: none;
+    box-shadow: none;
+    background: transparent;
+}
+
+.member-overlay-body .member-card .member-header {
+    padding: 20px 24px 16px;
+    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
+}
+
+.member-overlay-body .member-card .member-details {
+    padding: 20px 24px;
+}
+
+/* Hide expand icon in overlay since card is always expanded */
+.member-overlay-body .member-card .expand-icon {
+    display: none;
+}
+
+/* Ensure expanded state is visually clear */
+.member-overlay-body .member-card.expanded .member-details {
+    display: block;
+}
+
+/* Highlight animation for member cards */
+.member-card.highlighted {
+    animation: highlight-pulse 2s ease-in-out;
+}
+
+@keyframes highlight-pulse {
+    0%, 100% {
+        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
+    }
+    50% {
+        box-shadow: 0 8px 32px rgba(59, 130, 246, 0.4), 0 4px 16px rgba(0, 0, 0, 0.3);
+    }
+}
+
+/* Responsive design for overlay */
+@media (max-width: 768px) {
+    .member-overlay-content {
+        width: 95%;
+        max-width: none;
+        margin: 20px;
+    }
+    
+    .member-overlay-header {
+        padding: 20px 20px 12px;
+    }
+    
+    .member-overlay-body {
+        padding: 20px;
+    }
+    
+    .member-overlay-actions {
+        flex-direction: column;
+    }
+    
+    .member-overlay-title h3 {
+        font-size: 1.3rem;
+    }
+}
+
+/* Test page styles */
+.test-section {
+    background: rgba(255, 255, 255, 0.05);
+    border: 1px solid rgba(255, 255, 255, 0.1);
+    border-radius: 12px;
+    padding: 24px;
+    margin: 24px 0;
+}
+
+.test-section h2 {
+    color: #ecf0f1;
+    margin-top: 0;
+}
+
+#test-overlay-btn {
+    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
+    color: white;
+    border: none;
+    padding: 12px 24px;
+    border-radius: 8px;
+    font-weight: 600;
+    cursor: pointer;
+    transition: all 0.2s ease;
+}
+
+#test-overlay-btn:hover {
+    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
+    transform: translateY(-1px);
+}
+
 /* Loading and error states */
 .loading, .error, .no-data {
     display: flex;
diff --git a/public/test-member-overlay.html b/public/test-member-overlay.html
new file mode 100644
index 0000000..e18c82e
--- /dev/null
+++ b/public/test-member-overlay.html
@@ -0,0 +1,58 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Test Member Card Overlay</title>
+    <link rel="stylesheet" href="styles.css">
+    <script src="./d3.v7.min.js"></script>
+</head>
+<body>
+    <div class="container">
+        <h1>Test Member Card Overlay</h1>
+        
+        <div class="test-section">
+            <h2>Test Data</h2>
+            <button id="test-overlay-btn">Show Test Member Overlay</button>
+        </div>
+        
+        <div id="member-card-overlay" class="member-card-overlay"></div>
+    </div>
+
+    <script src="./framework.js"></script>
+    <script src="./components.js"></script>
+    <script>
+        // Test the member card overlay
+        document.addEventListener('DOMContentLoaded', function() {
+            const testBtn = document.getElementById('test-overlay-btn');
+            const overlayContainer = document.getElementById('member-card-overlay');
+            
+            // Create test view model and event bus
+            const testVM = new ViewModel();
+            const testEventBus = new EventBus();
+            
+            // Create the overlay component
+            const overlayComponent = new MemberCardOverlayComponent(overlayContainer, testVM, testEventBus);
+            overlayComponent.mount();
+            
+            // Test data
+            const testMember = {
+                ip: '192.168.1.100',
+                hostname: 'test-node-01',
+                status: 'active',
+                latency: 15,
+                labels: {
+                    'environment': 'production',
+                    'region': 'us-west',
+                    'role': 'worker'
+                }
+            };
+            
+            // Show overlay on button click
+            testBtn.addEventListener('click', function() {
+                overlayComponent.show(testMember);
+            });
+        });
+    </script>
+</body>
+</html> 
\ No newline at end of file
diff --git a/public/test-topology-overlay.html b/public/test-topology-overlay.html
new file mode 100644
index 0000000..abca027
--- /dev/null
+++ b/public/test-topology-overlay.html
@@ -0,0 +1,63 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Test Topology with Member Card Overlay</title>
+    <link rel="stylesheet" href="styles.css">
+    <script src="./d3.v7.min.js"></script>
+</head>
+<body>
+    <div class="container">
+        <h1>Test Topology with Member Card Overlay</h1>
+        
+        <div class="test-section">
+            <h2>Topology View with Clickable Nodes</h2>
+            <p>Click on any node in the topology to see the member card overlay.</p>
+            <button id="refresh-topology-btn">Refresh Topology</button>
+        </div>
+        
+        <div id="topology-graph-container">
+            <div class="loading">
+                <div>Loading network topology...</div>
+            </div>
+        </div>
+        
+        <div id="member-card-overlay" class="member-card-overlay"></div>
+    </div>
+
+    <script src="./demo-topology-data.js"></script>
+    <script src="./framework.js"></script>
+    <script src="./components.js"></script>
+    <script>
+        // Test the topology view with member card overlay
+        document.addEventListener('DOMContentLoaded', function() {
+            console.log('Setting up test topology with member card overlay...');
+            
+            // Override the API client with demo data
+            window.apiClient = window.demoApiClient;
+            
+            // Create topology view model
+            const topologyVM = new TopologyViewModel();
+            
+            // Create the topology component
+            const topologyComponent = new TopologyGraphComponent(
+                document.getElementById('topology-graph-container'), 
+                topologyVM, 
+                new EventBus()
+            );
+            
+            // Mount the component
+            topologyComponent.mount();
+            
+            // Refresh button
+            const refreshBtn = document.getElementById('refresh-topology-btn');
+            refreshBtn.addEventListener('click', function() {
+                topologyVM.updateNetworkTopology();
+            });
+            
+            console.log('Test topology setup complete');
+        });
+    </script>
+</body>
+</html> 
\ No newline at end of file