diff --git a/frontend/src/components/AMMComponents.tsx b/frontend/src/components/AMMComponents.tsx
index ab6156cb..08199dd7 100644
--- a/frontend/src/components/AMMComponents.tsx
+++ b/frontend/src/components/AMMComponents.tsx
@@ -15,7 +15,11 @@ export function AMMPoolCard({ poolId, onSelect }: PoolCardProps) {
   if (!pool) return <div className="p-4">Pool not found</div>;
 
   return (
-    <div className="border rounded-lg p-4 cursor-pointer hover:bg-gray-50" onClick={() => onSelect(poolId)}>
+    <button
+      type="button"
+      className="border rounded-lg p-4 cursor-pointer hover:bg-gray-50 w-full text-left"
+      onClick={() => onSelect(poolId)}
+    >
       <div className="flex justify-between mb-2">
         <span className="font-semibold">
           {pool.tokenA} / {pool.tokenB}
@@ -32,7 +36,7 @@ export function AMMPoolCard({ poolId, onSelect }: PoolCardProps) {
           <div className="font-mono">{Number(pool.reserveB) / 1e12}</div>
         </div>
       </div>
-    </div>
+    </button>
   );
 }
 
diff --git a/frontend/src/components/AuditLogViewer.tsx b/frontend/src/components/AuditLogViewer.tsx
index 9cfb8d1e..c08576b4 100644
--- a/frontend/src/components/AuditLogViewer.tsx
+++ b/frontend/src/components/AuditLogViewer.tsx
@@ -173,16 +173,37 @@ export function AuditLogViewer({ auditLogger, pageSize = 20 }: AuditLogViewerPro
         <table className="logs-table">
           <thead>
             <tr>
-              <th onClick={() => handleSort('timestamp')} className="sortable">
+              <th
+                onClick={() => handleSort('timestamp')}
+                onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); handleSort('timestamp'); } }}
+                className="sortable"
+                tabIndex={0}
+                role="columnheader"
+                aria-sort={sortBy === 'timestamp' ? (sortOrder === 'asc' ? 'ascending' : 'descending') : 'none'}
+              >
                 Timestamp {sortBy === 'timestamp' && (sortOrder === 'asc' ? '↑' : '↓')}
               </th>
               <th>User ID</th>
-              <th onClick={() => handleSort('action')} className="sortable">
+              <th
+                onClick={() => handleSort('action')}
+                onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); handleSort('action'); } }}
+                className="sortable"
+                tabIndex={0}
+                role="columnheader"
+                aria-sort={sortBy === 'action' ? (sortOrder === 'asc' ? 'ascending' : 'descending') : 'none'}
+              >
                 Action {sortBy === 'action' && (sortOrder === 'asc' ? '↑' : '↓')}
               </th>
               <th>Resource</th>
               <th>Resource ID</th>
-              <th onClick={() => handleSort('status')} className="sortable">
+              <th
+                onClick={() => handleSort('status')}
+                onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); handleSort('status'); } }}
+                className="sortable"
+                tabIndex={0}
+                role="columnheader"
+                aria-sort={sortBy === 'status' ? (sortOrder === 'asc' ? 'ascending' : 'descending') : 'none'}
+              >
                 Status {sortBy === 'status' && (sortOrder === 'asc' ? '↑' : '↓')}
               </th>
               <th>Details</th>
diff --git a/frontend/src/components/ChartLegend.tsx b/frontend/src/components/ChartLegend.tsx
index a896ae99..45255e55 100644
--- a/frontend/src/components/ChartLegend.tsx
+++ b/frontend/src/components/ChartLegend.tsx
@@ -61,6 +61,10 @@ export function TechnicalIndicatorLegend({
           key={indicator.name}
           className="indicator-item"
           onClick={() => onToggleIndicator?.(indicator.name)}
+          onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); onToggleIndicator?.(indicator.name); } }}
+          role="button"
+          tabIndex={onToggleIndicator ? 0 : undefined}
+          aria-label={`Toggle indicator ${indicator.name}`}
         >
           <div className="indicator-header">
             {indicator.color && (
diff --git a/frontend/src/components/DisputeCard.tsx b/frontend/src/components/DisputeCard.tsx
index be52dda9..5449f6cf 100644
--- a/frontend/src/components/DisputeCard.tsx
+++ b/frontend/src/components/DisputeCard.tsx
@@ -46,6 +46,10 @@ export function DisputeCard({
       <div 
         className="p-4 cursor-pointer hover:bg-gray-700/30 transition-colors"
         onClick={() => setExpanded(!expanded)}
+        onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); setExpanded(!expanded); } }}
+        role="button"
+        tabIndex={0}
+        aria-expanded={expanded}
       >
         <div className="flex items-center justify-between">
           <div className="flex items-center gap-3">
diff --git a/frontend/src/components/DrawingToolsPanel.tsx b/frontend/src/components/DrawingToolsPanel.tsx
index 91dd6de9..f86111bc 100644
--- a/frontend/src/components/DrawingToolsPanel.tsx
+++ b/frontend/src/components/DrawingToolsPanel.tsx
@@ -72,6 +72,10 @@ export function DrawingToolsPanel({
                 onClick={() =>
                   setExpandedToolId(expandedToolId === tool.id ? null : tool.id)
                 }
+                onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); setExpandedToolId(expandedToolId === tool.id ? null : tool.id); } }}
+                role="button"
+                tabIndex={0}
+                aria-expanded={expandedToolId === tool.id}
               >
                 <div className="tool-info">
                   <input
diff --git a/frontend/src/components/IndicatorPanel.tsx b/frontend/src/components/IndicatorPanel.tsx
index 7bf8757e..0f06b3f1 100644
--- a/frontend/src/components/IndicatorPanel.tsx
+++ b/frontend/src/components/IndicatorPanel.tsx
@@ -66,6 +66,10 @@ export function IndicatorPanel({
                     expandedIndicator === indicator.name ? null : indicator.name
                   )
                 }
+                onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); setExpandedIndicator(expandedIndicator === indicator.name ? null : indicator.name); } }}
+                role="button"
+                tabIndex={0}
+                aria-expanded={expandedIndicator === indicator.name}
               >
                 <div className="indicator-title">
                   <input
diff --git a/frontend/src/components/MarketFilter.tsx b/frontend/src/components/MarketFilter.tsx
index 9d303523..3a537c34 100644
--- a/frontend/src/components/MarketFilter.tsx
+++ b/frontend/src/components/MarketFilter.tsx
@@ -43,17 +43,18 @@ interface CategoryOptionProps {
 }
 
 const CategoryOption = memo(({ category, isSelected, onSelect }: CategoryOptionProps) => (
-  <div
+  <button
+    type="button"
     role="option"
     aria-selected={isSelected}
     onClick={() => onSelect(category.value)}
-    className={`px-4 py-2 cursor-pointer hover:bg-neutral-100 dark:hover:bg-neutral-800 ${
+    className={`w-full text-left px-4 py-2 cursor-pointer hover:bg-neutral-100 dark:hover:bg-neutral-800 ${
       isSelected ? 'bg-blue-50 dark:bg-blue-900/20 text-blue-600 dark:text-blue-400' : ''
     }`}
   >
     <span className="mr-2">{category.icon}</span>
     {category.label}
-  </div>
+  </button>
 ));
 
 interface SortOptionItemProps {
@@ -63,16 +64,17 @@ interface SortOptionItemProps {
 }
 
 const SortOptionItem = memo(({ option, isSelected, onSelect }: SortOptionItemProps) => (
-  <div
+  <button
+    type="button"
     role="option"
     aria-selected={isSelected}
     onClick={() => onSelect(option.value)}
-    className={`px-4 py-2 cursor-pointer hover:bg-neutral-100 dark:hover:bg-neutral-800 ${
+    className={`w-full text-left px-4 py-2 cursor-pointer hover:bg-neutral-100 dark:hover:bg-neutral-800 ${
       isSelected ? 'bg-blue-50 dark:bg-blue-900/20 text-blue-600 dark:text-blue-400' : ''
     }`}
   >
     {option.label}
-  </div>
+  </button>
 ));
 
 export function MarketFilter({
diff --git a/frontend/src/components/MobileBottomSheet.tsx b/frontend/src/components/MobileBottomSheet.tsx
index 5fa68ef4..b4dc1a55 100644
--- a/frontend/src/components/MobileBottomSheet.tsx
+++ b/frontend/src/components/MobileBottomSheet.tsx
@@ -39,6 +39,9 @@ export function MobileBottomSheet({
       <div
         className="absolute inset-0 bg-black/50 backdrop-blur-sm"
         onClick={onClose}
+        onKeyDown={(e) => { if (e.key === 'Escape') onClose(); }}
+        role="presentation"
+        tabIndex={-1}
       />
       
       <div
diff --git a/frontend/src/components/MobileModal.tsx b/frontend/src/components/MobileModal.tsx
index 1d62fb62..e7dfe0dc 100644
--- a/frontend/src/components/MobileModal.tsx
+++ b/frontend/src/components/MobileModal.tsx
@@ -46,6 +46,9 @@ export function MobileModal({
       <div
         className="absolute inset-0 bg-black/50 backdrop-blur-sm"
         onClick={onClose}
+        onKeyDown={(e) => { if (e.key === 'Escape') onClose(); }}
+        role="presentation"
+        tabIndex={-1}
       />
       
       <div
diff --git a/frontend/src/components/NetworkSwitchDialog.tsx b/frontend/src/components/NetworkSwitchDialog.tsx
index a83ed8e7..248e7595 100644
--- a/frontend/src/components/NetworkSwitchDialog.tsx
+++ b/frontend/src/components/NetworkSwitchDialog.tsx
@@ -44,6 +44,9 @@ export function NetworkSwitchDialog({
       <div 
         className="absolute inset-0 bg-black/70 backdrop-blur-sm"
         onClick={onCancel}
+        onKeyDown={(e) => { if (e.key === 'Escape') onCancel(); }}
+        role="presentation"
+        tabIndex={-1}
       />
       
       {/* Dialog */}
diff --git a/frontend/src/components/OracleCard.tsx b/frontend/src/components/OracleCard.tsx
index 08024066..4fd6adcf 100644
--- a/frontend/src/components/OracleCard.tsx
+++ b/frontend/src/components/OracleCard.tsx
@@ -30,6 +30,10 @@ const OracleCardBase = ({ oracle, onSelect, compact = false }: OracleCardProps)
       <div 
         className="flex items-center justify-between p-3 bg-gray-800/50 rounded-lg border border-gray-700 hover:border-purple-500/50 transition-colors cursor-pointer"
         onClick={() => onSelect?.(oracle.address)}
+        onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); onSelect?.(oracle.address); } }}
+        role="button"
+        tabIndex={onSelect ? 0 : undefined}
+        aria-label={`Select oracle ${oracle.address}`}
       >
         <div className="flex items-center gap-3">
           <div className={`w-2 h-2 rounded-full ${oracle.isRegistered ? 'bg-green-500' : 'bg-gray-500'}`} />
@@ -50,6 +54,10 @@ const OracleCardBase = ({ oracle, onSelect, compact = false }: OracleCardProps)
     <div 
       className="bg-gray-800/50 rounded-xl p-5 border border-gray-700 hover:border-purple-500/50 transition-colors cursor-pointer"
       onClick={() => onSelect?.(oracle.address)}
+      onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); onSelect?.(oracle.address); } }}
+      role="button"
+      tabIndex={onSelect ? 0 : undefined}
+      aria-label={`Select oracle ${oracle.address}`}
     >
       {/* Header */}
       <div className="flex items-start justify-between mb-4">
diff --git a/frontend/src/components/OracleHealthDashboard.tsx b/frontend/src/components/OracleHealthDashboard.tsx
index c3ea161b..0df47aeb 100644
--- a/frontend/src/components/OracleHealthDashboard.tsx
+++ b/frontend/src/components/OracleHealthDashboard.tsx
@@ -140,6 +140,10 @@ export const OracleHealthDashboard: React.FC<HealthDashboardProps> = ({
             key={stat.provider}
             className={`border p-4 rounded-lg cursor-pointer transition ${getStatusColor(stat)}`}
             onClick={() => setSelectedProvider(stat.provider)}
+            onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); setSelectedProvider(stat.provider); } }}
+            role="button"
+            tabIndex={0}
+            aria-label={`View details for oracle provider ${stat.provider}`}
           >
             <div className="flex items-center justify-between mb-3">
               <h3 className="font-semibold text-gray-900">{stat.provider}</h3>
diff --git a/frontend/src/components/ProposalCard.tsx b/frontend/src/components/ProposalCard.tsx
index 3c864cfe..9f4681a6 100644
--- a/frontend/src/components/ProposalCard.tsx
+++ b/frontend/src/components/ProposalCard.tsx
@@ -53,6 +53,10 @@ export function ProposalCard({
   return (
     <div
       onClick={() => onSelect(proposal)}
+      onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); onSelect(proposal); } }}
+      role="button"
+      tabIndex={0}
+      aria-label={`View proposal: ${proposal.title}`}
       style={{
         backgroundColor: '#0A0A0A',
         border: '1px solid #1F1F1F',
diff --git a/frontend/src/components/ResponsiveChart.tsx b/frontend/src/components/ResponsiveChart.tsx
index 5e897931..d4358c1f 100644
--- a/frontend/src/components/ResponsiveChart.tsx
+++ b/frontend/src/components/ResponsiveChart.tsx
@@ -191,14 +191,15 @@ export function CompactIndicatorPanel({
     <div className="compact-indicator-panel">
       <div className="indicators-summary">
         {indicators.slice(0, 3).map(indicator => (
-          <div
+          <button
             key={indicator.name}
+            type="button"
             className="indicator-badge"
             onClick={() => onShowDetails?.(indicator.name)}
           >
             <span className="name">{indicator.name}</span>
             <span className="value">{indicator.value.toFixed(2)}</span>
-          </div>
+          </button>
         ))}
         {indicators.length > 3 && (
           <div className="more-indicators">
diff --git a/frontend/src/components/RoleManagementDashboard.tsx b/frontend/src/components/RoleManagementDashboard.tsx
index 6a2e0a85..8752ff0c 100644
--- a/frontend/src/components/RoleManagementDashboard.tsx
+++ b/frontend/src/components/RoleManagementDashboard.tsx
@@ -65,6 +65,10 @@ export function RoleManagementDashboard({
               key={role.id}
               className={`role-card ${selectedRoleId === role.id ? 'selected' : ''}`}
               onClick={() => handleRoleSelect(role.id)}
+              onKeyDown={(e) => { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); handleRoleSelect(role.id); } }}
+              role="button"
+              tabIndex={0}
+              aria-pressed={selectedRoleId === role.id}
             >
               <div className="role-header">
                 <h4>{role.name}</h4>
diff --git a/frontend/src/components/WizardProgress.tsx b/frontend/src/components/WizardProgress.tsx
index eaf54a68..07c4b9f3 100644
--- a/frontend/src/components/WizardProgress.tsx
+++ b/frontend/src/components/WizardProgress.tsx
@@ -108,8 +108,16 @@ export function WizardProgress({
             key={index}
             style={stepStyle(index)}
             onClick={() => onStepClick?.(index)}
+            onKeyDown={(e) => {
+              if (e.key === 'Enter' || e.key === ' ') {
+                e.preventDefault();
+                onStepClick?.(index);
+              }
+            }}
             role="button"
-            tabIndex={0}
+            tabIndex={onStepClick ? 0 : -1}
+            aria-label={`Step ${index + 1}: ${label}`}
+            aria-current={index === currentStep ? 'step' : undefined}
           >
             <div style={stepCircleStyle(index)}>
               {index < currentStep ? '✓' : index + 1}
diff --git a/frontend/src/examples/RBACExamples.tsx b/frontend/src/examples/RBACExamples.tsx
index 4b2e0935..520b51a0 100644
--- a/frontend/src/examples/RBACExamples.tsx
+++ b/frontend/src/examples/RBACExamples.tsx
@@ -118,7 +118,15 @@ export function APIServiceExample() {
     }
   }
 
-  return <div onClick={() => performOperation()}>Perform Operation</div>;
+  return (
+    <button
+      type="button"
+      onClick={() => performOperation()}
+      style={{ background: 'none', border: 'none', cursor: 'pointer', padding: 0 }}
+    >
+      Perform Operation
+    </button>
+  );
 }
 
 export function ResourceAccessExample() {
@@ -183,5 +191,13 @@ export function ValidationExample() {
     };
   }
 
-  return <div onClick={() => validateSetup()}>Validate System</div>;
+  return (
+    <button
+      type="button"
+      onClick={() => validateSetup()}
+      style={{ background: 'none', border: 'none', cursor: 'pointer', padding: 0 }}
+    >
+      Validate System
+    </button>
+  );
 }
diff --git a/frontend/src/pages/GovernancePage.tsx b/frontend/src/pages/GovernancePage.tsx
index 9a64c581..8c179416 100644
--- a/frontend/src/pages/GovernancePage.tsx
+++ b/frontend/src/pages/GovernancePage.tsx
@@ -721,8 +721,19 @@ export function GovernancePage() {
 
         {/* Proposal Detail Modal */}
         {selectedProposal && (
-          <div style={modalOverlayStyle} onClick={() => setSelectedProposal(null)}>
-            <div style={{ ...modalStyle, position: 'relative' }} onClick={e => e.stopPropagation()}>
+          <div
+            style={modalOverlayStyle}
+            onClick={() => setSelectedProposal(null)}
+            onKeyDown={(e) => { if (e.key === 'Escape') setSelectedProposal(null); }}
+            role="presentation"
+          >
+            <div
+              style={{ ...modalStyle, position: 'relative' }}
+              onClick={e => e.stopPropagation()}
+              role="dialog"
+              aria-modal="true"
+              aria-label={selectedProposal.title}
+            >
               <button style={closeButtonStyle} onClick={() => setSelectedProposal(null)}>
                 ×
               </button>
@@ -906,8 +917,19 @@ export function GovernancePage() {
 
         {/* Delegate Modal */}
         {showDelegateModal && (
-          <div style={modalOverlayStyle} onClick={() => setShowDelegateModal(false)}>
-            <div style={{ ...modalStyle, position: 'relative', maxWidth: '500px' }} onClick={e => e.stopPropagation()}>
+          <div
+            style={modalOverlayStyle}
+            onClick={() => setShowDelegateModal(false)}
+            onKeyDown={(e) => { if (e.key === 'Escape') setShowDelegateModal(false); }}
+            role="presentation"
+          >
+            <div
+              style={{ ...modalStyle, position: 'relative', maxWidth: '500px' }}
+              onClick={e => e.stopPropagation()}
+              role="dialog"
+              aria-modal="true"
+              aria-label="Delegate Voting Power"
+            >
               <button style={closeButtonStyle} onClick={() => setShowDelegateModal(false)}>
                 ×
               </button>