diff --git a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
index e6546b2..245524a 100644
--- a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
+++ b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PiezoMonitoringView.kt
@@ -730,7 +730,7 @@ fun PiezoMonitoringView(appState: AppState) {
             .background(urgency.backgroundColor)
     ) {
         // Top bar
-        val hPad = if (isCompact) 12.dp else 24.dp
+        val hPad = (screenWidth * 0.05f).dp
         Row(
             modifier = Modifier
                 .fillMaxWidth()
@@ -854,7 +854,7 @@ fun PiezoMonitoringView(appState: AppState) {
             verticalArrangement = if (appState.isDevMode)
                 Arrangement.spacedBy(if (isCompact) 12.dp else 20.dp)
             else
-                Arrangement.spacedBy(if (isCompact) 32.dp else 40.dp)
+                Arrangement.spacedBy((screenWidth * 0.08f).dp.coerceIn(20.dp, 48.dp))
         ) {
 
             // Status badge (항상 urgency 메시지)
@@ -871,12 +871,16 @@ fun PiezoMonitoringView(appState: AppState) {
                     .padding(horizontal = 20.dp, vertical = 8.dp)
             )
 
-            // Donut chart with Bladdy
-            val donutSize = if (appState.isDevMode) {
-                if (isCompact) 220.dp else 280.dp
-            } else {
-                if (isCompact) 300.dp else 360.dp  // 일반 모드: 화면 거의 가득
-            }
+            // Donut chart with Bladdy — 화면 비율 기반
+            val screenWidthDp = screenWidth.dp
+            val donutRatio = if (appState.isDevMode) 0.65f else 0.85f
+            val donutSize = screenWidthDp * donutRatio
+            val lineWidthRatio = if (appState.isDevMode) 0.07f else 0.08f
+            val donutLineWidth = donutSize * lineWidthRatio
+            val bladdyRatio = if (appState.isDevMode) 0.30f else 0.55f
+            val bladdySize = donutSize * bladdyRatio
+            val volFontSize = if (appState.isDevMode) 18.sp else (screenWidth * 0.06f).sp
+
             val maxVolumeForDonut = appState.piezoSettings.maxVolume.toDouble()
             val donutProgress = if (maxVolumeForDonut > 0 && maxVolumeMl > 0)
                 (maxVolumeMl / maxVolumeForDonut).coerceIn(0.0, 1.0) else 0.0
@@ -885,7 +889,7 @@ fun PiezoMonitoringView(appState: AppState) {
                 if (!appState.isDevMode) {
                     Box(
                         modifier = Modifier
-                            .size(donutSize - 50.dp)
+                            .size(donutSize * 0.85f)
                             .clip(CircleShape)
                             .background(Color.White.copy(alpha = 0.5f))
                     )
@@ -893,11 +897,7 @@ fun PiezoMonitoringView(appState: AppState) {
                 DonutChartView(
                     progress = donutProgress,
                     urgency = urgency,
-                    lineWidth = if (appState.isDevMode) {
-                        if (isCompact) 22.dp else 30.dp
-                    } else {
-                        if (isCompact) 26.dp else 34.dp
-                    },
+                    lineWidth = donutLineWidth,
                     size = donutSize
                 )
                 // Bladdy + 볼륨 (정중앙)
@@ -906,14 +906,8 @@ fun PiezoMonitoringView(appState: AppState) {
                     verticalArrangement = Arrangement.Center,
                     modifier = Modifier.matchParentSize()
                 ) {
-                    val bladdySize = if (appState.isDevMode) {
-                        if (isCompact) 80.dp else 110.dp
-                    } else {
-                        if (isCompact) 180.dp else 220.dp
-                    }
                     BladdyRiveView(urgency = urgency, size = bladdySize)
                     Spacer(modifier = Modifier.height(4.dp))
-                    val volFontSize = if (appState.isDevMode) 18.sp else 24.sp
                     Text(
                         if (displayMaxVolumeMl > 0) "${"%.0f".format(displayMaxVolumeMl)} mL" else "${appState.estimatedVolume} mL",
                         fontSize = volFontSize,
@@ -940,7 +934,7 @@ fun PiezoMonitoringView(appState: AppState) {
             }
 
             // Control buttons: Void/Catheterize / Auto / Spot
-            val btnHeight = if (appState.isDevMode) 56.dp else 62.dp
+            val btnHeight = (screenWidth * 0.15f).dp.coerceIn(50.dp, 70.dp)
             Row(horizontalArrangement = Arrangement.spacedBy(if (appState.isDevMode) 8.dp else 10.dp)) {
                 // Void / Catheterize — 즉시 카테터 1개 감소 + 기록
                 Button(