diff --git a/frontend/src/components/NodeManager.tsx b/frontend/src/components/NodeManager.tsx
index 6ec431b8..07e991bc 100644
--- a/frontend/src/components/NodeManager.tsx
+++ b/frontend/src/components/NodeManager.tsx
@@ -333,7 +333,7 @@ export function NodeManager() {
                         <TooltipTrigger>
                           <Star className="w-4 h-4 text-yellow-500 fill-yellow-500" />
                         </TooltipTrigger>
-                        <TooltipContent>Default Node</TooltipContent>
+                        <TooltipContent><span className="font-mono text-xs tabular-nums text-stat-value">Default Node</span></TooltipContent>
                       </Tooltip>
                     </TooltipProvider>
                   )}
@@ -395,7 +395,7 @@ export function NodeManager() {
                                 </span>
                               </TooltipTrigger>
                               <TooltipContent>
-                                {new Date(summary.next_run_at).toLocaleString()}
+                                <span className="font-mono text-xs tabular-nums text-stat-value">{new Date(summary.next_run_at).toLocaleString()}</span>
                               </TooltipContent>
                             </Tooltip>
                           </TooltipProvider>
@@ -450,7 +450,7 @@ export function NodeManager() {
                             <Calendar className="w-4 h-4" strokeWidth={1.5} />
                           </Button>
                         </TooltipTrigger>
-                        <TooltipContent>View Schedules</TooltipContent>
+                        <TooltipContent><span className="font-mono text-xs tabular-nums text-stat-value">View Schedules</span></TooltipContent>
                       </Tooltip>
                     </TooltipProvider>
 
@@ -469,7 +469,7 @@ export function NodeManager() {
                               <Wifi className={`w-4 h-4 ${testing === node.id ? 'animate-pulse' : ''}`} />
                             </Button>
                           </TooltipTrigger>
-                          <TooltipContent>Test Connection</TooltipContent>
+                          <TooltipContent><span className="font-mono text-xs tabular-nums text-stat-value">Test Connection</span></TooltipContent>
                         </Tooltip>
                       </TooltipProvider>
                     )}
@@ -488,7 +488,7 @@ export function NodeManager() {
                               <Pencil className="w-4 h-4" />
                             </Button>
                           </TooltipTrigger>
-                          <TooltipContent>Edit Node</TooltipContent>
+                          <TooltipContent><span className="font-mono text-xs tabular-nums text-stat-value">Edit Node</span></TooltipContent>
                         </Tooltip>
                       </TooltipProvider>
                     )}
@@ -507,7 +507,7 @@ export function NodeManager() {
                               <Trash2 className="w-4 h-4" />
                             </Button>
                           </TooltipTrigger>
-                          <TooltipContent>Delete Node</TooltipContent>
+                          <TooltipContent><span className="font-mono text-xs tabular-nums text-stat-value">Delete Node</span></TooltipContent>
                         </Tooltip>
                       </TooltipProvider>
                     )}
diff --git a/frontend/src/components/StackAlertSheet.tsx b/frontend/src/components/StackAlertSheet.tsx
index 6d3032a3..c3977a1e 100644
--- a/frontend/src/components/StackAlertSheet.tsx
+++ b/frontend/src/components/StackAlertSheet.tsx
@@ -384,7 +384,7 @@ function AlertsTab({ stackName }: { stackName: string }) {
                                         <HelpCircle className="h-4 w-4 text-muted-foreground cursor-help" strokeWidth={1.5} />
                                     </TooltipTrigger>
                                     <TooltipContent>
-                                        <p className="max-w-[200px] text-sm">The system resource or metric to monitor. Select from CPU, Memory, Network I/O, or Restarts.</p>
+                                        <span className="font-mono text-xs tabular-nums text-stat-value max-w-[200px]">The system resource or metric to monitor. Select from CPU, Memory, Network I/O, or Restarts.</span>
                                     </TooltipContent>
                                 </Tooltip>
                             </div>
diff --git a/frontend/src/components/TopBar.tsx b/frontend/src/components/TopBar.tsx
index aeba5256..8aff520e 100644
--- a/frontend/src/components/TopBar.tsx
+++ b/frontend/src/components/TopBar.tsx
@@ -90,7 +90,7 @@ export function TopBar({
                         ) : (
                             <Tooltip key={value}>
                                 <TooltipTrigger asChild>{button}</TooltipTrigger>
-                                <TooltipContent side="bottom">{label}</TooltipContent>
+                                <TooltipContent side="bottom"><span className="font-mono text-xs tabular-nums text-stat-value">{label}</span></TooltipContent>
                             </Tooltip>
                         );
                     })}
diff --git a/frontend/src/components/fleet/FleetConfiguration.tsx b/frontend/src/components/fleet/FleetConfiguration.tsx
index 7d7bcc81..214c12b2 100644
--- a/frontend/src/components/fleet/FleetConfiguration.tsx
+++ b/frontend/src/components/fleet/FleetConfiguration.tsx
@@ -84,7 +84,7 @@ function PolicySyncRow({ state }: { state: PolicySyncState }) {
               {state.kind === 'paused' ? 'paused' : 'degraded'}
             </span>
           </TooltipTrigger>
-          <TooltipContent>{tooltip}</TooltipContent>
+          <TooltipContent><span className="font-mono text-xs tabular-nums text-stat-value">{tooltip}</span></TooltipContent>
         </Tooltip>
       </TooltipProvider>
     </div>
diff --git a/frontend/src/components/fleet/FleetTopology.tsx b/frontend/src/components/fleet/FleetTopology.tsx
index 8d091ce4..660a1280 100644
--- a/frontend/src/components/fleet/FleetTopology.tsx
+++ b/frontend/src/components/fleet/FleetTopology.tsx
@@ -122,7 +122,7 @@ function FleetNodeCard({ data, selected }: { data: FleetNodeData; selected?: boo
                             </div>
                         </TooltipTrigger>
                         <TooltipContent side="top">
-                            {node.cordonedReason || 'Cordoned: scheduling paused.'}
+                            <span className="font-mono text-xs tabular-nums text-stat-value">{node.cordonedReason || 'Cordoned: scheduling paused.'}</span>
                         </TooltipContent>
                     </Tooltip>
                 </TooltipProvider>
@@ -141,9 +141,11 @@ function FleetNodeCard({ data, selected }: { data: FleetNodeData; selected?: boo
                                     <Clock className="h-3 w-3 text-warning" strokeWidth={2} aria-label="Pilot heartbeat stale" />
                                 </TooltipTrigger>
                                 <TooltipContent side="top">
-                                    {node.pilotLastSeen
-                                        ? `Pilot heartbeat ${formatRelative(node.pilotLastSeen)}`
-                                        : 'Pilot heartbeat stale'}
+                                    <span className="font-mono text-xs tabular-nums text-stat-value">
+                                        {node.pilotLastSeen
+                                            ? `Pilot heartbeat ${formatRelative(node.pilotLastSeen)}`
+                                            : 'Pilot heartbeat stale'}
+                                    </span>
                                 </TooltipContent>
                             </Tooltip>
                         </TooltipProvider>
@@ -179,7 +181,7 @@ function FleetNodeCard({ data, selected }: { data: FleetNodeData; selected?: boo
                                     </span>
                                 </TooltipTrigger>
                                 <TooltipContent side="top">
-                                    {labels.slice(MAX_INLINE_LABELS).join(', ')}
+                                    <span className="font-mono text-xs tabular-nums text-stat-value">{labels.slice(MAX_INLINE_LABELS).join(', ')}</span>
                                 </TooltipContent>
                             </Tooltip>
                         </TooltipProvider>
@@ -260,7 +262,7 @@ function TopologyToolbar({
                                 </button>
                             </TooltipTrigger>
                             <TooltipContent side="bottom">
-                                {spec.description}
+                                <span className="font-mono text-xs tabular-nums text-stat-value">{spec.description}</span>
                             </TooltipContent>
                         </Tooltip>
                     </TooltipProvider>
diff --git a/frontend/src/components/sidebar/SidebarActions.tsx b/frontend/src/components/sidebar/SidebarActions.tsx
index 478767ed..12c9e460 100644
--- a/frontend/src/components/sidebar/SidebarActions.tsx
+++ b/frontend/src/components/sidebar/SidebarActions.tsx
@@ -30,7 +30,7 @@ export function SidebarActions({ createStackSlot, onScan, isScanning, bulkMode,
             </Button>
           </TooltipTrigger>
           <TooltipContent side="bottom">
-            <p>Bulk mode (B)</p>
+            <span className="font-mono text-xs tabular-nums text-stat-value">Bulk mode (B)</span>
           </TooltipContent>
         </Tooltip>
       </TooltipProvider>
@@ -50,7 +50,7 @@ export function SidebarActions({ createStackSlot, onScan, isScanning, bulkMode,
             </Button>
           </TooltipTrigger>
           <TooltipContent side="bottom">
-            <p>Scan stacks folder</p>
+            <span className="font-mono text-xs tabular-nums text-stat-value">Scan stacks folder</span>
           </TooltipContent>
         </Tooltip>
       </TooltipProvider>
diff --git a/frontend/src/components/sidebar/__tests__/StackRow.test.tsx b/frontend/src/components/sidebar/__tests__/StackRow.test.tsx
index a200979c..15b642dc 100644
--- a/frontend/src/components/sidebar/__tests__/StackRow.test.tsx
+++ b/frontend/src/components/sidebar/__tests__/StackRow.test.tsx
@@ -43,7 +43,7 @@ describe('StackRow', () => {
   });
 
   it('wraps the partial pill in a hover tooltip', () => {
-    const { container } = render(<StackRow {...base({ status: 'partial', running: 3, total: 5 })} />);
+    render(<StackRow {...base({ status: 'partial', running: 3, total: 5 })} />);
     const trigger = screen.getByText('PT');
     // Radix TooltipTrigger adds data-state to the wrapped element.
     expect(trigger.getAttribute('data-state')).toBe('closed');