diff --git a/ESP32/vehicle-monitor.cpp b/ESP32/vehicle-monitor.cpp
index e80e8f9..ae8fc0a 100644
--- a/ESP32/vehicle-monitor.cpp
+++ b/ESP32/vehicle-monitor.cpp
@@ -22,8 +22,8 @@ const float wheelDiameterInches = 20;
 const int numImpulsesPerTurn = 2;
 const float wheelCircumferenceMeters = wheelDiameterInches * 0.0254f * 3.1415f / (float)numImpulsesPerTurn;
 
-int16_t batteryVoltage = -1; // in mV
-int16_t batteryCurrent = -1; // in mV
+uint16_t batteryVoltage = 0; // in mV
+uint16_t batteryCurrent = 0; // in mV
 
 WiFiMulti wifiMulti;
 wl_status_t wifi_STA_status = WL_NO_SHIELD;
@@ -224,8 +224,8 @@ void loop()
 	averageC = max(0.0f, averageC - 2.5f) / 0.0238f; // convert voltage to current, according to the sensor linear relation
 
 	// TODO: mutex ?
-	batteryVoltage = (int16_t)(averageV * 1000.0f + 0.5f);
-	batteryCurrent = (int16_t)(averageC * 1000.0f + 0.5f);
+	batteryVoltage = (uint16_t)(averageV * 1000.0f + 0.5f);
+	batteryCurrent = (uint16_t)(averageC * 1000.0f + 0.5f);
 
 	delay(10);
 }
diff --git a/WebApp/package.json b/WebApp/package.json
index 35891ff..2644ec4 100644
--- a/WebApp/package.json
+++ b/WebApp/package.json
@@ -14,7 +14,9 @@
   },
   "devDependencies": {
     "@types/mithril": "^2.0.9",
+    "css-loader": "^6.7.1",
     "html-webpack-plugin": "^5.5.0",
+    "style-loader": "^3.3.1",
     "ts-loader": "^9.2.8",
     "typescript": "^4.6.2",
     "webpack": "^5.70.0",
diff --git a/WebApp/src/main-page.css b/WebApp/src/main-page.css
new file mode 100644
index 0000000..535d5e5
--- /dev/null
+++ b/WebApp/src/main-page.css
@@ -0,0 +1,3 @@
+.main-page p {
+	font-size: 4rem;
+}
\ No newline at end of file
diff --git a/WebApp/src/main-page.tsx b/WebApp/src/main-page.tsx
index e0bb99d..d419f07 100644
--- a/WebApp/src/main-page.tsx
+++ b/WebApp/src/main-page.tsx
@@ -1,6 +1,8 @@
 import m from 'mithril';
 import { MonitorApi, Status } from './monitor-api';
 
+require("./main-page.css");
+
 export default class MainPage {
 	api = new MonitorApi(false);
 	status?: Status;
@@ -22,7 +24,7 @@ export default class MainPage {
 	
 	view() {
 		return this.status
-			? <div>
+			? <div class="main-page">
 				<p>Tension batterie : {this.status.batteryVoltage.toFixed(3)}V</p>
 				<p>Courant : {this.status.motorCurrent.toFixed(3)}A</p>
 				<p>Puissance : {(this.status.batteryVoltage * this.status.motorCurrent).toFixed(1)}W</p>
diff --git a/WebApp/webpack.config.js b/WebApp/webpack.config.js
index 996de34..290f280 100644
--- a/WebApp/webpack.config.js
+++ b/WebApp/webpack.config.js
@@ -10,6 +10,10 @@ module.exports = {
         use: 'ts-loader',
         exclude: /node_modules/,
       },
+      {
+        test: /\.css$/i,
+        use: ["style-loader", "css-loader"],
+      },
     ],
   },
   resolve: {