diff --git a/static/css/adsb_dashboard.css b/static/css/adsb_dashboard.css
index 1b8e9ab..4531dca 100644
--- a/static/css/adsb_dashboard.css
+++ b/static/css/adsb_dashboard.css
@@ -5,6 +5,8 @@
 }
 
 :root {
+    --font-sans: 'JetBrains Mono', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
     --bg-dark: #0a0c10;
     --bg-panel: #0f1218;
     --bg-card: #151a23;
diff --git a/static/css/adsb_history.css b/static/css/adsb_history.css
index 1261599..3b42de9 100644
--- a/static/css/adsb_history.css
+++ b/static/css/adsb_history.css
@@ -5,6 +5,8 @@
 }
 
 :root {
+    --font-sans: 'JetBrains Mono', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
     --bg-dark: #0a0c10;
     --bg-panel: #0f1218;
     --bg-card: #141a24;
diff --git a/static/css/agents.css b/static/css/agents.css
index bece8d5..46706dd 100644
--- a/static/css/agents.css
+++ b/static/css/agents.css
@@ -5,6 +5,8 @@
 
 /* CSS Variables (inherited from main theme) */
 :root {
+    --font-sans: 'JetBrains Mono', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
     --bg-primary: #0a0a0f;
     --bg-secondary: #12121a;
     --text-primary: #e0e0e0;
diff --git a/static/css/ais_dashboard.css b/static/css/ais_dashboard.css
index 38985fc..149b2e3 100644
--- a/static/css/ais_dashboard.css
+++ b/static/css/ais_dashboard.css
@@ -8,6 +8,8 @@
 }
 
 :root {
+    --font-sans: 'JetBrains Mono', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
     --bg-dark: #0a0c10;
     --bg-panel: #0f1218;
     --bg-card: #151a23;
diff --git a/static/css/index.css b/static/css/index.css
index 79d955f..06efcb3 100644
--- a/static/css/index.css
+++ b/static/css/index.css
@@ -5,6 +5,8 @@
 }
 
 :root {
+    --font-sans: 'JetBrains Mono', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
     /* Tactical dark palette */
     --bg-primary: #0a0c10;
     --bg-secondary: #0f1218;
diff --git a/static/css/satellite_dashboard.css b/static/css/satellite_dashboard.css
index 9d64ecd..f3ed1a8 100644
--- a/static/css/satellite_dashboard.css
+++ b/static/css/satellite_dashboard.css
@@ -5,6 +5,8 @@
 }
 
 :root {
+    --font-sans: 'JetBrains Mono', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
     --bg-dark: #0a0c10;
     --bg-panel: #0f1218;
     --bg-card: #151a23;
@@ -748,4 +750,4 @@ body.embedded .panel {
 
 body.embedded .controls-bar {
     padding: 10px 15px;
-}
\ No newline at end of file
+}
diff --git a/templates/adsb_dashboard.html b/templates/adsb_dashboard.html
index dc7c481..0f16815 100644
--- a/templates/adsb_dashboard.html
+++ b/templates/adsb_dashboard.html
@@ -2259,7 +2259,7 @@ ACARS: ${r.statistics.acarsMessages} messages`;
                 z-index: 10000;
                 box-shadow: 0 4px 20px rgba(0,0,0,0.3);
                 max-width: 320px;
-                font-family: 'Inter', sans-serif;
+                font-family: var(--font-sans);
             `;
 
             if (type === 'not_installed') {
@@ -2344,7 +2344,7 @@ ACARS: ${r.statistics.acarsMessages} messages`;
                 box-shadow: 0 4px 20px rgba(0,0,0,0.5);
                 max-width: 500px;
                 text-align: left;
-                font-family: 'Inter', sans-serif;
+                font-family: var(--font-sans);
             `;
             warning.innerHTML = `
                 <div style="font-weight: bold; margin-bottom: 8px;">⚠️ ${typeList} Detected - readsb Required</div>
diff --git a/templates/network_monitor.html b/templates/network_monitor.html
index ebb544f..2bf9b11 100644
--- a/templates/network_monitor.html
+++ b/templates/network_monitor.html
@@ -16,6 +16,8 @@
         * { margin: 0; padding: 0; box-sizing: border-box; }
 
         :root {
+            --font-sans: 'JetBrains Mono', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+            --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
             --bg-primary: #0a0a0f;
             --bg-secondary: #12121a;
             --bg-tertiary: #1a1a2e;
@@ -30,7 +32,7 @@
         }
 
         body {
-            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
+            font-family: var(--font-sans);
             background: var(--bg-primary);
             color: var(--text-primary);
             min-height: 100vh;