diff --git a/app/src/main/java/com/example/medilightv2android/ui/views/connection/DeviceScanView.kt b/app/src/main/java/com/example/medilightv2android/ui/views/connection/DeviceScanView.kt
index 548dfe0..ec68846 100644
--- a/app/src/main/java/com/example/medilightv2android/ui/views/connection/DeviceScanView.kt
+++ b/app/src/main/java/com/example/medilightv2android/ui/views/connection/DeviceScanView.kt
@@ -95,21 +95,28 @@ fun DeviceScanView(appState: AppState) {
     }
 
     // 서비스 준비 + 페어링(bonding) 완료 확인 후 다음 화면
+    var showPairingHint by remember { mutableStateOf(false) }
     LaunchedEffect(isServiceReady) {
         if (isServiceReady) {
             connectingDeviceAddress = null
-            // 페어링 완료 대기 (최대 30초, 500ms 간격 폴링)
-            var waited = 0
-            while (!bleManager.isBonded && waited < 30000) {
-                kotlinx.coroutines.delay(500)
-                waited += 500
-            }
             if (bleManager.isBonded) {
+                // 이미 페어링됨 → 바로 진행
                 appState.deviceConnected()
             } else {
-                // 페어링 거부/타임아웃 → 연결 해제
-                bleManager.disconnect()
-                bleManager.connectionError.value = "Pairing required. Please pair the device."
+                // 페어링 필요 → 안내 표시 + 대기
+                showPairingHint = true
+                var waited = 0
+                while (!bleManager.isBonded && waited < 30000) {
+                    kotlinx.coroutines.delay(500)
+                    waited += 500
+                }
+                showPairingHint = false
+                if (bleManager.isBonded) {
+                    appState.deviceConnected()
+                } else {
+                    bleManager.disconnect()
+                    bleManager.connectionError.value = "Pairing required. Please pair the device."
+                }
             }
         }
     }
@@ -120,6 +127,16 @@ fun DeviceScanView(appState: AppState) {
 
     DisposableEffect(Unit) { onDispose { bleManager.stopScan() } }
 
+    // 페어링 안내 다이얼로그
+    if (showPairingHint) {
+        AlertDialog(
+            onDismissRequest = {},
+            title = { Text("Pairing Required", fontWeight = FontWeight.Bold) },
+            text = { Text("A Bluetooth pairing request will appear.\nTap 'Pair', then enter PIN if prompted.") },
+            confirmButton = {}
+        )
+    }
+
     Column(
         modifier = Modifier
             .fillMaxSize()
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 2e5808d..5911e4f 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
@@ -92,6 +92,8 @@ fun PiezoMonitoringView(appState: AppState) {
 
     val screenWidth = LocalConfiguration.current.screenWidthDp
     val isCompact = screenWidth < 400
+    // 태블릿(600dp+) 글자 스케일: 폰=1.0, 태블릿=~1.6
+    val fontScale = (screenWidth / 360f).coerceIn(1.0f, 1.8f)
 
     val isDemoMode = appState.isDemoMode
     val urgency = appState.bladderLevel.urgency
@@ -769,7 +771,7 @@ fun PiezoMonitoringView(appState: AppState) {
                             cornerRadius = androidx.compose.ui.geometry.CornerRadius(2f))
                     }
                     Spacer(modifier = Modifier.width(4.dp))
-                    Text("$batteryLvl%", fontSize = 12.sp, fontWeight = FontWeight.Bold, color = batteryColor)
+                    Text("$batteryLvl%", fontSize = (12 * fontScale).sp, fontWeight = FontWeight.Bold, color = batteryColor)
                 }
             }
 
@@ -789,7 +791,7 @@ fun PiezoMonitoringView(appState: AppState) {
                 ) {
                     Icon(Icons.Default.LocalHospital, "Catheter", tint = MlPrimary, modifier = Modifier.size(16.dp))
                     Spacer(modifier = Modifier.width(4.dp))
-                    Text("$cathCount", fontSize = 13.sp, fontWeight = FontWeight.Bold, color = MlPrimary)
+                    Text("$cathCount", fontSize = (13 * fontScale).sp, fontWeight = FontWeight.Bold, color = MlPrimary)
                 }
             }
             if (showAddCatheter) {
@@ -862,7 +864,7 @@ fun PiezoMonitoringView(appState: AppState) {
             val statusColor = urgency.accentColor
             Text(
                 text = statusText,
-                fontSize = 14.sp,
+                fontSize = (14 * fontScale).sp,
                 fontWeight = FontWeight.Bold,
                 color = statusColor,
                 modifier = Modifier
@@ -873,7 +875,7 @@ fun PiezoMonitoringView(appState: AppState) {
 
             // Donut chart with Bladdy — 화면 비율 기반
             val screenWidthDp = screenWidth.dp
-            val donutRatio = if (appState.isDevMode) 0.65f else 0.85f
+            val donutRatio = if (appState.isDevMode) 0.65f else 0.75f
             val donutSize = screenWidthDp * donutRatio
             val lineWidthRatio = if (appState.isDevMode) 0.07f else 0.08f
             val donutLineWidth = donutSize * lineWidthRatio
@@ -917,7 +919,7 @@ fun PiezoMonitoringView(appState: AppState) {
                 }
             }
 
-            // Info cards (Fill/Level은 maxVolume 기준)
+            // Info cards (Fill/Level은 maxVolume 기준)ㅋ
             val maxVol = appState.piezoSettings.maxVolume.toDouble()
             // fill/level은 maxVolumeMl(세션 최대) 기준
             val fillPct = if (maxVol > 0 && maxVolumeMl > 0) (maxVolumeMl / maxVol * 100).coerceAtMost(100.0) else 0.0
@@ -934,7 +936,7 @@ fun PiezoMonitoringView(appState: AppState) {
             }
 
             // Control buttons: Void/Catheterize / Auto / Spot
-            val btnHeight = (screenWidth * 0.15f).dp.coerceIn(50.dp, 70.dp)
+            val btnHeight = (screenWidth * 0.18f).dp.coerceIn(56.dp, 80.dp)
             Row(horizontalArrangement = Arrangement.spacedBy(if (appState.isDevMode) 8.dp else 10.dp)) {
                 // Void / Catheterize — 즉시 카테터 1개 감소 + 기록
                 Button(
@@ -952,7 +954,7 @@ fun PiezoMonitoringView(appState: AppState) {
                         android.widget.Toast.makeText(context, "Recorded", android.widget.Toast.LENGTH_SHORT).show()
                     },
                     enabled = !isSpotInProgress && !isAutoMeasuring,
-                    modifier = Modifier.weight(1.3f).height(btnHeight),
+                    modifier = Modifier.weight(1f).height(btnHeight),
                     shape = RoundedCornerShape(14.dp),
                     colors = ButtonDefaults.buttonColors(
                         containerColor = MlPrimary.copy(alpha = 0.1f),
@@ -960,8 +962,8 @@ fun PiezoMonitoringView(appState: AppState) {
                     )
                 ) {
                     Column(horizontalAlignment = Alignment.CenterHorizontally) {
-                        Text("Voided", fontSize = 13.sp, fontWeight = FontWeight.SemiBold, color = MlPrimary)
-                        Text("Catheterized", fontSize = 13.sp, fontWeight = FontWeight.SemiBold, color = MlPrimary)
+                        Text("Void/", fontSize = (13 * fontScale).sp, fontWeight = FontWeight.SemiBold, color = MlPrimary)
+                        Text("Catheterization", fontSize = (13 * fontScale).sp, fontWeight = FontWeight.SemiBold, color = MlPrimary)
                     }
                 }
 
@@ -979,9 +981,9 @@ fun PiezoMonitoringView(appState: AppState) {
                     )
                 ) {
                     if (isAutoMeasuring) {
-                        Text("Stop Scan", fontSize = 14.sp, fontWeight = FontWeight.SemiBold, color = Color.White)
+                        Text("Stop Scan", fontSize = (14 * fontScale).sp, fontWeight = FontWeight.SemiBold, color = Color.White)
                     } else {
-                        Text("Auto Scan", fontSize = 14.sp, fontWeight = FontWeight.SemiBold, color = Color.White)
+                        Text("Auto Scan", fontSize = (14 * fontScale).sp, fontWeight = FontWeight.SemiBold, color = Color.White)
                     }
                 }
 
@@ -1032,7 +1034,7 @@ fun PiezoMonitoringView(appState: AppState) {
                     if (isSpotInProgress) {
                         CircularProgressIndicator(color = Color.White, modifier = Modifier.size(18.dp), strokeWidth = 2.dp)
                     } else {
-                        Text("Single Scan", fontSize = 14.sp, fontWeight = FontWeight.SemiBold, color = Color.White)
+                        Text("Single Scan", fontSize = (14 * fontScale).sp, fontWeight = FontWeight.SemiBold, color = Color.White)
                     }
                 }
             }
@@ -1788,19 +1790,20 @@ private fun InfoCard(title: String, value: String, unit: String, color: Color, m
         shape = RoundedCornerShape(14.dp),
         colors = CardDefaults.cardColors(containerColor = MlCardBackground)
     ) {
+        val fs = (LocalConfiguration.current.screenWidthDp / 360f).coerceIn(1.0f, 1.8f)
         Column(
             modifier = Modifier.padding(vertical = 14.dp).fillMaxWidth(),
             horizontalAlignment = Alignment.CenterHorizontally,
             verticalArrangement = Arrangement.spacedBy(4.dp)
         ) {
             Row(verticalAlignment = Alignment.Bottom) {
-                Text(value, fontSize = 20.sp, fontWeight = FontWeight.Bold, color = Color(0xFF1C1B1F))
+                Text(value, fontSize = (20 * fs).sp, fontWeight = FontWeight.Bold, color = Color(0xFF1C1B1F))
                 if (unit.isNotEmpty()) {
                     Spacer(modifier = Modifier.width(3.dp))
-                    Text(unit, fontSize = 12.sp, color = MlSecondaryText, modifier = Modifier.padding(bottom = 2.dp))
+                    Text(unit, fontSize = (12 * fs).sp, color = MlSecondaryText, modifier = Modifier.padding(bottom = 2.dp))
                 }
             }
-            Text(title, fontSize = 11.sp, fontWeight = FontWeight.SemiBold, color = MlSecondaryText)
+            Text(title, fontSize = (11 * fs).sp, fontWeight = FontWeight.SemiBold, color = MlSecondaryText)
         }
     }
 }
diff --git a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt
index 1dce11e..9537a46 100644
--- a/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt
+++ b/app/src/main/java/com/example/medilightv2android/ui/views/monitoring/PlacementGuideView.kt
@@ -235,14 +235,14 @@ fun PlacementGuideView(appState: AppState) {
             }
             Text(
                 text = displayHint,
-                fontSize = 15.sp,
+                fontSize = 28.sp,
                 fontWeight = FontWeight.SemiBold,
                 color = hintFg,
                 textAlign = TextAlign.Center,
                 modifier = Modifier
                     .fillMaxWidth()
-                    .background(hintBg, RoundedCornerShape(12.dp))
-                    .padding(12.dp)
+                    .background(hintBg, RoundedCornerShape(16.dp))
+                    .padding(horizontal = 20.dp, vertical = 18.dp)
             )
 
             // ── 하복부 Canvas 실루엣 + 센서 + 방향 가이드 ──
@@ -401,7 +401,7 @@ fun PlacementGuideView(appState: AppState) {
                         contentDescription = "Sensor",
                         modifier = Modifier
                             .size(width = sensorW, height = sensorH)
-                            .align(androidx.compose.ui.BiasAlignment(0f, 0.44f)),
+                            .align(androidx.compose.ui.BiasAlignment(0f, 0.55f)),
                         contentScale = androidx.compose.ui.layout.ContentScale.Fit,
                         alpha = 0.95f
                     )
@@ -802,11 +802,11 @@ fun PlacementGuideView(appState: AppState) {
                     },
                     modifier = Modifier
                         .fillMaxWidth()
-                        .height(52.dp),
-                    shape = RoundedCornerShape(14.dp),
+                        .height(96.dp),
+                    shape = RoundedCornerShape(18.dp),
                     colors = ButtonDefaults.buttonColors(containerColor = Color(0xFFFF9800))
                 ) {
-                    Text("Start Alignment", fontSize = 16.sp, fontWeight = FontWeight.Bold, color = Color.White)
+                    Text("Start Alignment", fontSize = 28.sp, fontWeight = FontWeight.Bold, color = Color.White)
                 }
             }
 
@@ -819,16 +819,16 @@ fun PlacementGuideView(appState: AppState) {
                 enabled = isLocked,  // GREEN(Optimal)일 때만 활성
                 modifier = Modifier
                     .fillMaxWidth()
-                    .height(52.dp),
-                shape = RoundedCornerShape(14.dp),
+                    .height(96.dp),
+                shape = RoundedCornerShape(18.dp),
                 colors = ButtonDefaults.buttonColors(
                     containerColor = if (isLocked) Color(0xFF4CAF50) else MlPrimary,
                     disabledContainerColor = Color.Gray.copy(alpha = 0.3f)
                 )
             ) {
-                Icon(Icons.Filled.CheckCircle, contentDescription = null, tint = Color.White)
-                Spacer(modifier = Modifier.width(8.dp))
-                Text("Start Scanning", fontSize = 16.sp, fontWeight = FontWeight.Bold, color = Color.White)
+                Icon(Icons.Filled.CheckCircle, contentDescription = null, tint = Color.White, modifier = Modifier.size(32.dp))
+                Spacer(modifier = Modifier.width(10.dp))
+                Text("Start Scanning", fontSize = 28.sp, fontWeight = FontWeight.Bold, color = Color.White)
             }
 
             // Skip button