diff --git a/Assets/Resources/UIToolkit/Modal/UTKAlert.uss b/Assets/Resources/UIToolkit/Modal/UTKAlert.uss
index 32c006b4..1c63b144 100644
--- a/Assets/Resources/UIToolkit/Modal/UTKAlert.uss
+++ b/Assets/Resources/UIToolkit/Modal/UTKAlert.uss
@@ -43,7 +43,7 @@
 
 .utk-alert__content {
     flex-direction: column;
-    align-items: center;
+    align-items: stretch;
     flex-grow: 1;
     margin-top: var(--space-xxl);
     margin-bottom: var(--space-xxl);
@@ -56,7 +56,7 @@
 .utk-alert__message {
     font-size: var(--font-size-body2);
     color: var(--color-text-secondary);
-    -unity-text-align: middle-center;
+    -unity-text-align: middle-left;
     white-space: normal;
 }
 
@@ -66,7 +66,7 @@
 
 .utk-alert__buttons {
     flex-direction: row;
-    justify-content: center;
+    justify-content: flex-end;
 }
 
 .utk-alert__btn {
diff --git a/Assets/Resources/UIToolkit/Modal/UTKModal.uss b/Assets/Resources/UIToolkit/Modal/UTKModal.uss
index 5acbced5..d5282c65 100644
--- a/Assets/Resources/UIToolkit/Modal/UTKModal.uss
+++ b/Assets/Resources/UIToolkit/Modal/UTKModal.uss
@@ -98,6 +98,11 @@
     overflow: scroll;
 }
 
+.utk-modal__content {
+    color: var(--color-text-primary);
+    font-size: var(--font-size-body1);
+}
+
 /* ===================================
    Footer
    =================================== */
diff --git a/Assets/Resources/UIToolkit/Sample/Modal/UTKModalSample.uxml b/Assets/Resources/UIToolkit/Sample/Modal/UTKModalSample.uxml
new file mode 100644
index 00000000..d9c37522
--- /dev/null
+++ b/Assets/Resources/UIToolkit/Sample/Modal/UTKModalSample.uxml
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<UXML xmlns="UnityEngine.UIElements" xmlns:utk="UVC.UIToolkit">
+    <Style src="../UTKSampleCommon.uss" />
+
+    <VisualElement class="utk-sample-container">
+        <Label class="utk-sample-desc" text="모달 (Modal)" />
+
+        <VisualElement class="utk-sample-section">
+            <Label class="utk-sample-section__title" text="Modal Sizes" />
+            <VisualElement class="utk-sample-row">
+                <utk:UTKButton name="btn-modal-small" text="Small" variant="OutlineNormal" />
+                <utk:UTKButton name="btn-modal-medium" text="Medium" variant="Primary" />
+                <utk:UTKButton name="btn-modal-large" text="Large" variant="OutlineNormal" />
+                <utk:UTKButton name="btn-modal-fullscreen" text="FullScreen" variant="OutlineNormal" />
+            </VisualElement>
+        </VisualElement>
+
+        <VisualElement class="utk-sample-section">
+            <Label class="utk-sample-section__title" text="Options" />
+            <VisualElement class="utk-sample-row">
+                <utk:UTKButton name="btn-modal-footer" text="With Footer Buttons" variant="Normal" />
+                <utk:UTKButton name="btn-modal-no-close" text="No Close Button" variant="Normal" />
+                <utk:UTKButton name="btn-modal-no-backdrop" text="No Backdrop Close" variant="Normal" />
+            </VisualElement>
+        </VisualElement>
+
+        <VisualElement class="utk-sample-section">
+            <Label class="utk-sample-section__title" text="Custom Content" />
+            <VisualElement class="utk-sample-row">
+                <utk:UTKButton name="btn-modal-form" text="Form Modal" variant="Normal" />
+            </VisualElement>
+        </VisualElement>
+
+        <!-- Code Sample -->
+        <VisualElement class="utk-code-sample-container">
+            <utk:UTKCodeBlock name="code-csharp" title="C#" />
+            <utk:UTKCodeBlock name="code-uxml" title="UXML" />
+        </VisualElement>
+    </VisualElement>
+</UXML>
diff --git a/Assets/Resources/UIToolkit/Sample/Modal/UTKModalSample.uxml.meta b/Assets/Resources/UIToolkit/Sample/Modal/UTKModalSample.uxml.meta
new file mode 100644
index 00000000..e7cdacd2
--- /dev/null
+++ b/Assets/Resources/UIToolkit/Sample/Modal/UTKModalSample.uxml.meta
@@ -0,0 +1,10 @@
+fileFormatVersion: 2
+guid: 0cf3905be994d1247b02ebefc1beb32f
+ScriptedImporter:
+  internalIDToNameTable: []
+  externalObjects: {}
+  serializedVersion: 2
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 13804, guid: 0000000000000000e000000000000000, type: 0}
diff --git a/Assets/Resources/UIToolkit/Sample/Modal/UTKNotificationSample.uxml b/Assets/Resources/UIToolkit/Sample/Modal/UTKNotificationSample.uxml
new file mode 100644
index 00000000..56c482c1
--- /dev/null
+++ b/Assets/Resources/UIToolkit/Sample/Modal/UTKNotificationSample.uxml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="utf-8"?>
+<UXML xmlns="UnityEngine.UIElements" xmlns:utk="UVC.UIToolkit">
+    <Style src="../UTKSampleCommon.uss" />
+
+    <VisualElement class="utk-sample-container">
+        <Label class="utk-sample-desc" text="알림 (Notification)" />
+
+        <VisualElement class="utk-sample-section">
+            <Label class="utk-sample-section__title" text="Notification Types" />
+            <VisualElement class="utk-sample-row">
+                <utk:UTKButton name="btn-noti-info" text="Info" variant="Primary" />
+                <utk:UTKButton name="btn-noti-success" text="Success" variant="Normal" />
+                <utk:UTKButton name="btn-noti-warning" text="Warning" variant="Normal" />
+                <utk:UTKButton name="btn-noti-error" text="Error" variant="Danger" />
+            </VisualElement>
+        </VisualElement>
+
+        <VisualElement class="utk-sample-section">
+            <Label class="utk-sample-section__title" text="Position" />
+            <VisualElement class="utk-sample-row">
+                <utk:UTKButton name="btn-noti-top-left" text="Top Left" variant="OutlineNormal" />
+                <utk:UTKButton name="btn-noti-top-right" text="Top Right" variant="OutlineNormal" />
+                <utk:UTKButton name="btn-noti-bottom-left" text="Bottom Left" variant="OutlineNormal" />
+                <utk:UTKButton name="btn-noti-bottom-right" text="Bottom Right" variant="OutlineNormal" />
+            </VisualElement>
+        </VisualElement>
+
+        <VisualElement class="utk-sample-section">
+            <Label class="utk-sample-section__title" text="With Actions" />
+            <VisualElement class="utk-sample-row">
+                <utk:UTKButton name="btn-noti-action" text="With Action Buttons" variant="Normal" />
+                <utk:UTKButton name="btn-noti-persistent" text="Persistent (No Auto Close)" variant="Normal" />
+            </VisualElement>
+        </VisualElement>
+
+        <!-- Code Sample -->
+        <VisualElement class="utk-code-sample-container">
+            <utk:UTKCodeBlock name="code-csharp" title="C#" />
+        </VisualElement>
+    </VisualElement>
+</UXML>
diff --git a/Assets/Resources/UIToolkit/Sample/Modal/UTKNotificationSample.uxml.meta b/Assets/Resources/UIToolkit/Sample/Modal/UTKNotificationSample.uxml.meta
new file mode 100644
index 00000000..e8cc5d8c
--- /dev/null
+++ b/Assets/Resources/UIToolkit/Sample/Modal/UTKNotificationSample.uxml.meta
@@ -0,0 +1,10 @@
+fileFormatVersion: 2
+guid: ee2d341bdf4a1e24890200aae4cc279a
+ScriptedImporter:
+  internalIDToNameTable: []
+  externalObjects: {}
+  serializedVersion: 2
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 13804, guid: 0000000000000000e000000000000000, type: 0}
diff --git a/Assets/Resources/UIToolkit/Window/UTKPropertyListWindow.uxml b/Assets/Resources/UIToolkit/Window/UTKPropertyListWindow.uxml
index f763d570..498dfc34 100644
--- a/Assets/Resources/UIToolkit/Window/UTKPropertyListWindow.uxml
+++ b/Assets/Resources/UIToolkit/Window/UTKPropertyListWindow.uxml
@@ -3,7 +3,7 @@
     <VisualElement name="window-root" class="utk-property-window">
         <VisualElement name="header" class="utk-property-window__header">
             <utk:UTKLabel name="title" class="utk-property-window__title" />
-            <utk:UTKButton name="close-btn" class="utk-property-window__close-btn" variant="Text" icon-only="true" />
+            <utk:UTKButton name="close-btn" variant="Text" icon-only="true" icon-size="16" class="utk-property-window__close-btn"/>
         </VisualElement>
         <utk:UTKPropertyList name="content" class="utk-property-window__content" />
     </VisualElement>
diff --git a/Assets/Resources/UIToolkit/Window/UTKPropertyTabListWindow.uxml b/Assets/Resources/UIToolkit/Window/UTKPropertyTabListWindow.uxml
index 90e264aa..5cfa5844 100644
--- a/Assets/Resources/UIToolkit/Window/UTKPropertyTabListWindow.uxml
+++ b/Assets/Resources/UIToolkit/Window/UTKPropertyTabListWindow.uxml
@@ -18,7 +18,7 @@
     <VisualElement name="container" class="utk-property-tab-window" style="flex-grow: 1; flex-shrink: 0;">
         <VisualElement name="header" class="utk-property-tab-window__header">
             <Label name="title" text="Properties" class="utk-property-tab-window__title" />
-            <utk:UTKButton name="close-btn" variant="Text" icon-only="true" class="utk-property-tab-window__close-btn" />
+            <utk:UTKButton name="close-btn" variant="Text" icon-only="true" icon-size="16" class="utk-property-tab-window__close-btn" />
         </VisualElement>
         <ScrollView name="tab-scroll-view" mode="Horizontal" horizontal-scroller-visibility="Hidden" vertical-scroller-visibility="Hidden" style="flex-shrink: 0; margin-bottom: 8px; max-height: 28px;">
             <VisualElement name="tab-container" style="flex-direction: row; flex-shrink: 0;" />
diff --git a/Assets/Sample/UIToolkit/UTKColorPickerSample.cs b/Assets/Sample/UIToolkit/UTKColorPickerSample.cs
index 87c8f025..a0c0cd22 100644
--- a/Assets/Sample/UIToolkit/UTKColorPickerSample.cs
+++ b/Assets/Sample/UIToolkit/UTKColorPickerSample.cs
@@ -57,6 +57,7 @@ namespace UVC.Sample.UIToolkit
             };
 
             _root = _uiDocument.rootVisualElement;
+            UTKColorPicker.SetRoot(_root);
             CreateSampleUI();
         }
 
@@ -243,7 +244,7 @@ namespace UVC.Sample.UIToolkit
 
             bool useAlpha = _useAlphaToggle?.value ?? false;
 
-            _currentPicker = UTKColorPicker.Show(_root, _currentColor, "Select Color", useAlpha);
+            _currentPicker = UTKColorPicker.Show(_currentColor, "Select Color", useAlpha);
 
             _currentPicker.OnColorChanged += OnColorChanged;
             _currentPicker.OnColorSelected += OnColorSelected;
@@ -257,7 +258,7 @@ namespace UVC.Sample.UIToolkit
             if (_root == null || _currentPicker != null) return;
 
             // useAlpha = true로 명시적 호출
-            _currentPicker = UTKColorPicker.Show(_root, _currentColor, "Select Color (Alpha ON)", useAlpha: true);
+            _currentPicker = UTKColorPicker.Show(_currentColor, "Select Color (Alpha ON)", useAlpha: true);
 
             _currentPicker.OnColorChanged += OnColorChanged;
             _currentPicker.OnColorSelected += OnColorSelected;
@@ -273,7 +274,7 @@ namespace UVC.Sample.UIToolkit
             if (_root == null || _currentPicker != null) return;
 
             // useAlpha = false로 명시적 호출
-            _currentPicker = UTKColorPicker.Show(_root, _currentColor, "Select Color (Alpha OFF)", useAlpha: false);
+            _currentPicker = UTKColorPicker.Show(_currentColor, "Select Color (Alpha OFF)", useAlpha: false);
 
             _currentPicker.OnColorChanged += OnColorChanged;
             _currentPicker.OnColorSelected += OnColorSelected;
@@ -309,7 +310,7 @@ namespace UVC.Sample.UIToolkit
 
             // ShowAsync를 사용하여 색상 선택 대기
             // OK 클릭 시 선택된 색상 반환, 취소/닫기 시 _currentColor 반환
-            Color selectedColor = await UTKColorPicker.ShowAsync(_root, _currentColor, "Select Color (Async)", useAlpha);
+            Color selectedColor = await UTKColorPicker.ShowAsync(_currentColor, "Select Color (Async)", useAlpha);
 
             // 결과 처리
             _currentColor = selectedColor;
diff --git a/Assets/Sample/UIToolkit/UTKDatePickerSample.cs b/Assets/Sample/UIToolkit/UTKDatePickerSample.cs
index 203fff03..33a0c2f0 100644
--- a/Assets/Sample/UIToolkit/UTKDatePickerSample.cs
+++ b/Assets/Sample/UIToolkit/UTKDatePickerSample.cs
@@ -64,6 +64,7 @@ namespace UVC.Sample.UIToolkit
             Debug.Log($"LocalizationManager: LoadDefaultLocalizationData success: {success}");
 
             _root = _uiDocument.rootVisualElement;
+            UTKDatePicker.SetRoot(_root);
             CreateSampleUI();
         }
 
@@ -227,7 +228,6 @@ namespace UVC.Sample.UIToolkit
             if (_root == null || _currentPicker != null) return;
 
             _currentPicker = UTKDatePicker.Show(
-                _root,
                 _selectedDate,
                 UTKDatePicker.PickerMode.DateOnly,
                 "Select Date"
@@ -242,7 +242,6 @@ namespace UVC.Sample.UIToolkit
             if (_root == null || _currentPicker != null) return;
 
             _currentPicker = UTKDatePicker.Show(
-                _root,
                 _selectedDateTime,
                 UTKDatePicker.PickerMode.DateAndTime,
                 "Select Date & Time"
@@ -259,7 +258,6 @@ namespace UVC.Sample.UIToolkit
             // ShowAsync를 사용하여 날짜 선택 대기
             // OK 클릭 시 선택된 날짜 반환, 취소/닫기 시 null 반환
             DateTime? result = await UTKDatePicker.ShowAsync(
-                _root,
                 _selectedDate,
                 UTKDatePicker.PickerMode.DateOnly,
                 "Select Date (Async)"
@@ -350,7 +348,6 @@ namespace UVC.Sample.UIToolkit
             if (_root == null || _currentPicker != null) return;
 
             _currentPicker = UTKDatePicker.ShowRange(
-                _root,
                 _rangeStartDate,
                 _rangeEndDate,
                 false,
@@ -368,7 +365,6 @@ namespace UVC.Sample.UIToolkit
             // ShowRangeAsync를 사용하여 날짜 범위 선택 대기
             // OK 클릭 시 선택된 범위 반환, 취소/닫기 시 null 반환
             var result = await UTKDatePicker.ShowRangeAsync(
-                _root,
                 _rangeStartDate,
                 _rangeEndDate,
                 false,
diff --git a/Assets/Sample/UIToolkit/UTKPropertyListWindowSample.cs b/Assets/Sample/UIToolkit/UTKPropertyListWindowSample.cs
index 48b68f90..232e2893 100644
--- a/Assets/Sample/UIToolkit/UTKPropertyListWindowSample.cs
+++ b/Assets/Sample/UIToolkit/UTKPropertyListWindowSample.cs
@@ -3,6 +3,7 @@ using System;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UIElements;
+using UVC.Locale;
 using UVC.UIToolkit;
 
 namespace UVC.Sample.UIToolkit
@@ -26,6 +27,10 @@ namespace UVC.Sample.UIToolkit
 
         private void Start()
         {
+
+            bool success = LocalizationManager.Instance.LoadDefaultLocalizationData("KO");
+            Debug.Log($"LocalizationManager: LoadDefaultLocalizationData success: {success}");
+
             // UIDocument 참조 확인
             var doc = GetComponent<UIDocument>();
             if (doc == null)
diff --git a/Assets/Sample/UIToolkit/UTKStyleGuideSample.Modal.cs b/Assets/Sample/UIToolkit/UTKStyleGuideSample.Modal.cs
index 88568678..5c157189 100644
--- a/Assets/Sample/UIToolkit/UTKStyleGuideSample.Modal.cs
+++ b/Assets/Sample/UIToolkit/UTKStyleGuideSample.Modal.cs
@@ -203,14 +203,14 @@ var currentTab = tabView.SelectedIndex;",
         var btnCallback = root.Q<UTKButton>("btn-callback");
         btnCallback?.RegisterCallback<ClickEvent>(_ =>
         {
-            UTKAlert.ShowInfo(_root, "Callback Style", "This uses callback instead of async.",
+            UTKAlert.ShowInfo("Callback Style", "This uses callback instead of async.",
                 onClose: () => Debug.Log("Alert closed via callback"));
         });
 
         var btnConfirmCallback = root.Q<UTKButton>("btn-confirm-callback");
         btnConfirmCallback?.RegisterCallback<ClickEvent>(_ =>
         {
-            UTKAlert.ShowConfirm(_root, "Confirm", "Do you want to proceed?",
+            UTKAlert.ShowConfirm("Confirm", "Do you want to proceed?",
                 onConfirm: () => Debug.Log("Confirmed via callback!"),
                 onCancel: () => Debug.Log("Cancelled via callback!"));
         });
@@ -262,11 +262,11 @@ await UTKAlert.ShowInfoAsync(""정보"", ""배경을 클릭해도 닫힙니다."
 // ========================================
 
 // Info with Callback
-UTKAlert.ShowInfo(rootVisualElement, ""정보"", ""콜백 방식입니다."",
+UTKAlert.ShowInfo(""정보"", ""콜백 방식입니다."",
     onClose: () => Debug.Log(""Alert가 닫혔습니다.""));
 
 // Confirm with Callback
-UTKAlert.ShowConfirm(rootVisualElement, ""확인"", ""진행하시겠습니까?"",
+UTKAlert.ShowConfirm(""확인"", ""진행하시겠습니까?"",
     onConfirm: () => Debug.Log(""확인 클릭!""),
     onCancel: () => Debug.Log(""취소 클릭!""));");
     }
@@ -405,12 +405,383 @@ for (int i = 0; i < buttons.Length; i++)
 
     #endregion
 
+    #region Modal Initializers (UTKModal)
+
+    private void InitializeModalSample(VisualElement root)
+    {
+        if (_root == null) return;
+
+        UTKModal.SetRoot(_root);
+
+        // Modal Sizes
+        var btnSmall = root.Q<UTKButton>("btn-modal-small");
+        btnSmall?.RegisterCallback<ClickEvent>(_ => ShowModalWithSize(UTKModal.ModalSize.Small));
+
+        var btnMedium = root.Q<UTKButton>("btn-modal-medium");
+        btnMedium?.RegisterCallback<ClickEvent>(_ => ShowModalWithSize(UTKModal.ModalSize.Medium));
+
+        var btnLarge = root.Q<UTKButton>("btn-modal-large");
+        btnLarge?.RegisterCallback<ClickEvent>(_ => ShowModalWithSize(UTKModal.ModalSize.Large));
+
+        var btnFullScreen = root.Q<UTKButton>("btn-modal-fullscreen");
+        btnFullScreen?.RegisterCallback<ClickEvent>(_ => ShowModalWithSize(UTKModal.ModalSize.FullScreen));
+
+        // Options
+        var btnFooter = root.Q<UTKButton>("btn-modal-footer");
+        btnFooter?.RegisterCallback<ClickEvent>(_ =>
+        {
+            var modal = UTKModal.Show("푸터 버튼 모달", UTKModal.ModalSize.Medium);
+            modal.Add(new Label("확인 또는 취소를 선택하세요."));
+
+            var confirmBtn = new UTKButton("확인") { Variant = UTKButton.ButtonVariant.Primary };
+            confirmBtn.RegisterCallback<ClickEvent>(_ =>
+            {
+                Debug.Log("Modal confirmed");
+                modal.Close();
+            });
+
+            var cancelBtn = new UTKButton("취소") { Variant = UTKButton.ButtonVariant.Normal };
+            cancelBtn.RegisterCallback<ClickEvent>(_ =>
+            {
+                Debug.Log("Modal cancelled");
+                modal.Close();
+            });
+
+            modal.AddToFooter(cancelBtn);
+            modal.AddToFooter(confirmBtn);
+        });
+
+        var btnNoClose = root.Q<UTKButton>("btn-modal-no-close");
+        btnNoClose?.RegisterCallback<ClickEvent>(_ =>
+        {
+            var modal = UTKModal.Show("닫기 버튼 없음", UTKModal.ModalSize.Small);
+            modal.ShowCloseButton = false;
+            modal.Add(new Label("닫기 버튼이 없습니다.\n배경을 클릭하면 닫힙니다."));
+        });
+
+        var btnNoBackdrop = root.Q<UTKButton>("btn-modal-no-backdrop");
+        btnNoBackdrop?.RegisterCallback<ClickEvent>(_ =>
+        {
+            var modal = UTKModal.Show("배경 클릭 비활성화", UTKModal.ModalSize.Small);
+            modal.CloseOnBackdropClick = false;
+            modal.Add(new Label("배경을 클릭해도 닫히지 않습니다.\nX 버튼으로만 닫을 수 있습니다."));
+        });
+
+        // Custom Content - Form Modal
+        var btnForm = root.Q<UTKButton>("btn-modal-form");
+        btnForm?.RegisterCallback<ClickEvent>(_ =>
+        {
+            var modal = UTKModal.Show("사용자 정보 입력", UTKModal.ModalSize.Medium);
+
+            var nameField = new UTKInputField("이름");
+            var emailField = new UTKInputField("이메일");
+            modal.Add(nameField);
+            modal.Add(emailField);
+
+            var submitBtn = new UTKButton("제출") { Variant = UTKButton.ButtonVariant.Primary };
+            submitBtn.RegisterCallback<ClickEvent>(_ =>
+            {
+                Debug.Log($"Name: {nameField.value}, Email: {emailField.value}");
+                modal.Close();
+            });
+
+            var cancelBtn = new UTKButton("취소") { Variant = UTKButton.ButtonVariant.Normal };
+            cancelBtn.RegisterCallback<ClickEvent>(_ => modal.Close());
+
+            modal.AddToFooter(cancelBtn);
+            modal.AddToFooter(submitBtn);
+        });
+
+        SetCodeSamples(root,
+            csharpCode: @"// Root 설정 (한 번만)
+UTKModal.SetRoot(rootVisualElement);
+
+// ========================================
+// 1. 기본 모달 표시
+// ========================================
+
+var modal = UTKModal.Show(""제목"", UTKModal.ModalSize.Medium);
+modal.Add(new Label(""모달 내용""));
+
+// 닫힘 이벤트
+modal.OnClosed += () => Debug.Log(""모달 닫힘"");
+
+// ========================================
+// 2. 모달 크기
+// ========================================
+
+// Small
+UTKModal.Show(""Small"", UTKModal.ModalSize.Small);
+
+// Medium (기본)
+UTKModal.Show(""Medium"", UTKModal.ModalSize.Medium);
+
+// Large
+UTKModal.Show(""Large"", UTKModal.ModalSize.Large);
+
+// FullScreen
+UTKModal.Show(""FullScreen"", UTKModal.ModalSize.FullScreen);
+
+// ========================================
+// 3. 옵션 설정
+// ========================================
+
+var modal = UTKModal.Show(""설정"");
+
+// 닫기 버튼 숨기기
+modal.ShowCloseButton = false;
+
+// 배경 클릭 시 닫기 비활성화
+modal.CloseOnBackdropClick = false;
+
+// 푸터 숨기기
+modal.SetFooterVisible(false);
+
+// ========================================
+// 4. 푸터 버튼 추가
+// ========================================
+
+var modal = UTKModal.Show(""확인 모달"");
+modal.Add(new Label(""정말 삭제하시겠습니까?""));
+
+var confirmBtn = new UTKButton(""삭제"") { Variant = UTKButton.ButtonVariant.Danger };
+confirmBtn.RegisterCallback<ClickEvent>(_ =>
+{
+    Debug.Log(""삭제 실행"");
+    modal.Close();
+});
+
+var cancelBtn = new UTKButton(""취소"") { Variant = UTKButton.ButtonVariant.Normal };
+cancelBtn.RegisterCallback<ClickEvent>(_ => modal.Close());
+
+modal.AddToFooter(cancelBtn);
+modal.AddToFooter(confirmBtn);
+
+// ========================================
+// 5. 폼 모달
+// ========================================
+
+var modal = UTKModal.Show(""사용자 정보"");
+
+var nameField = new UTKInputField(""이름"");
+var emailField = new UTKInputField(""이메일"");
+modal.Add(nameField);
+modal.Add(emailField);
+
+var submitBtn = new UTKButton(""제출"") { Variant = UTKButton.ButtonVariant.Primary };
+submitBtn.RegisterCallback<ClickEvent>(_ =>
+{
+    Debug.Log($""Name: {nameField.value}, Email: {emailField.value}"");
+    modal.Close();
+});
+modal.AddToFooter(submitBtn);
+
+// ========================================
+// 6. 프로그래밍 방식 닫기
+// ========================================
+
+var modal = UTKModal.Show(""타이머 모달"");
+modal.Add(new Label(""3초 후 자동으로 닫힙니다.""));
+modal.ShowCloseButton = false;
+modal.CloseOnBackdropClick = false;
+
+// 3초 후 닫기
+modal.schedule.Execute(() => modal.Close()).StartingIn(3000);",
+            uxmlCode: @"<!-- 네임스페이스 선언 -->
+<ui:UXML xmlns:utk=""UVC.UIToolkit"">
+
+<!-- 기본 모달 -->
+<utk:UTKModal title=""설정"" size=""Medium"" show-close-button=""true"">
+    <ui:Label text=""모달 내용을 여기에 추가하세요"" />
+</utk:UTKModal>
+
+<!-- Small 모달, 닫기 버튼 없음 -->
+<utk:UTKModal title=""알림"" size=""Small"" show-close-button=""false"">
+    <ui:Label text=""간단한 알림"" />
+</utk:UTKModal>
+
+<!-- 배경 클릭 닫기 비활성화 -->
+<utk:UTKModal title=""중요"" size=""Medium"" close-on-backdrop-click=""false"">
+    <ui:Label text=""반드시 확인해야 하는 내용"" />
+</utk:UTKModal>
+
+</ui:UXML>");
+    }
+
+    private void ShowModalWithSize(UTKModal.ModalSize size)
+    {
+        if (_root == null) return;
+
+        var modal = UTKModal.Show($"{size} Modal", size);
+        modal.Add(new Label($"이것은 {size} 크기의 모달입니다."));
+        modal.OnClosed += () => Debug.Log($"{size} modal closed");
+    }
+
+    #endregion
+
+    #region Notification Initializers
+
+    private void InitializeNotificationSample(VisualElement root)
+    {
+        if (_root == null) return;
+
+        UTKNotification.SetRoot(_root);
+
+        // Notification Types
+        var btnInfo = root.Q<UTKButton>("btn-noti-info");
+        btnInfo?.RegisterCallback<ClickEvent>(_ =>
+            UTKNotification.ShowInfo("정보", "이것은 정보 알림입니다."));
+
+        var btnSuccess = root.Q<UTKButton>("btn-noti-success");
+        btnSuccess?.RegisterCallback<ClickEvent>(_ =>
+            UTKNotification.ShowSuccess("성공", "작업이 성공적으로 완료되었습니다!"));
+
+        var btnWarning = root.Q<UTKButton>("btn-noti-warning");
+        btnWarning?.RegisterCallback<ClickEvent>(_ =>
+            UTKNotification.ShowWarning("경고", "주의가 필요한 상황입니다."));
+
+        var btnError = root.Q<UTKButton>("btn-noti-error");
+        btnError?.RegisterCallback<ClickEvent>(_ =>
+            UTKNotification.ShowError("오류", "오류가 발생했습니다!"));
+
+        // Position
+        var btnTopLeft = root.Q<UTKButton>("btn-noti-top-left");
+        btnTopLeft?.RegisterCallback<ClickEvent>(_ =>
+            UTKNotification.Show("Top Left", "TopLeft 위치 알림",
+                UTKNotification.NotificationType.Info, UTKNotification.NotificationPosition.TopLeft));
+
+        var btnTopRight = root.Q<UTKButton>("btn-noti-top-right");
+        btnTopRight?.RegisterCallback<ClickEvent>(_ =>
+            UTKNotification.Show("Top Right", "TopRight 위치 알림",
+                UTKNotification.NotificationType.Info, UTKNotification.NotificationPosition.TopRight));
+
+        var btnBottomLeft = root.Q<UTKButton>("btn-noti-bottom-left");
+        btnBottomLeft?.RegisterCallback<ClickEvent>(_ =>
+            UTKNotification.Show("Bottom Left", "BottomLeft 위치 알림",
+                UTKNotification.NotificationType.Info, UTKNotification.NotificationPosition.BottomLeft));
+
+        var btnBottomRight = root.Q<UTKButton>("btn-noti-bottom-right");
+        btnBottomRight?.RegisterCallback<ClickEvent>(_ =>
+            UTKNotification.Show("Bottom Right", "BottomRight 위치 알림",
+                UTKNotification.NotificationType.Info, UTKNotification.NotificationPosition.BottomRight));
+
+        // With Actions
+        var btnAction = root.Q<UTKButton>("btn-noti-action");
+        btnAction?.RegisterCallback<ClickEvent>(_ =>
+        {
+            var notification = UTKNotification.Show("업데이트 가능",
+                "새로운 버전이 있습니다. 업데이트하시겠습니까?",
+                UTKNotification.NotificationType.Info, UTKNotification.NotificationPosition.TopRight);
+            notification.AddAction("업데이트", "update");
+            notification.AddAction("나중에", "later");
+            notification.OnActionClicked += (actionId) =>
+            {
+                Debug.Log($"Action clicked: {actionId}");
+            };
+        });
+
+        var btnPersistent = root.Q<UTKButton>("btn-noti-persistent");
+        btnPersistent?.RegisterCallback<ClickEvent>(_ =>
+        {
+            var notification = UTKNotification.Show("수동 닫기",
+                "이 알림은 자동으로 닫히지 않습니다. X 버튼을 눌러 닫아주세요.",
+                UTKNotification.NotificationType.Warning, UTKNotification.NotificationPosition.TopRight,
+                duration: 0);
+            notification.OnClosed += () => Debug.Log("Persistent notification closed");
+        });
+
+        SetCodeSamples(root,
+            csharpCode: @"// Root 설정 (한 번만)
+UTKNotification.SetRoot(rootVisualElement);
+
+// ========================================
+// 1. 기본 알림 타입
+// ========================================
+
+// Info
+UTKNotification.ShowInfo(""정보"", ""이것은 정보 알림입니다."");
+
+// Success
+UTKNotification.ShowSuccess(""성공"", ""작업이 완료되었습니다!"");
+
+// Warning
+UTKNotification.ShowWarning(""경고"", ""주의가 필요합니다."");
+
+// Error
+UTKNotification.ShowError(""오류"", ""오류가 발생했습니다!"");
+
+// ========================================
+// 2. 위치 지정
+// ========================================
+
+UTKNotification.Show(""제목"", ""메시지"",
+    UTKNotification.NotificationType.Info,
+    UTKNotification.NotificationPosition.TopRight);     // 기본값
+
+UTKNotification.Show(""제목"", ""메시지"",
+    UTKNotification.NotificationType.Success,
+    UTKNotification.NotificationPosition.BottomLeft);
+
+// ========================================
+// 3. 지속 시간 설정
+// ========================================
+
+// 기본 5초
+UTKNotification.ShowInfo(""정보"", ""5초 후 자동 닫힘"");
+
+// 10초
+UTKNotification.ShowInfo(""정보"", ""10초 후 자동 닫힘"", duration: 10000);
+
+// 수동 닫기 (자동 닫힘 없음)
+UTKNotification.ShowWarning(""경고"", ""수동으로 닫아주세요."", duration: 0);
+
+// ========================================
+// 4. 액션 버튼 추가
+// ========================================
+
+var notification = UTKNotification.Show(
+    ""업데이트 가능"", ""새로운 버전이 있습니다."",
+    UTKNotification.NotificationType.Info,
+    UTKNotification.NotificationPosition.TopRight);
+
+notification.AddAction(""업데이트"", ""update"");
+notification.AddAction(""나중에"", ""later"");
+
+notification.OnActionClicked += (actionId) =>
+{
+    if (actionId == ""update"")
+        Debug.Log(""업데이트 시작"");
+    else
+        Debug.Log(""나중에 업데이트"");
+};
+
+// ========================================
+// 5. 닫힘 이벤트
+// ========================================
+
+var noti = UTKNotification.ShowInfo(""알림"", ""메시지"");
+noti.OnClosed += () => Debug.Log(""알림이 닫혔습니다."");
+
+// ========================================
+// 6. 인스턴스 직접 생성
+// ========================================
+
+var custom = new UTKNotification(""제목"", ""메시지"", UTKNotification.NotificationType.Success);
+custom.Duration = 0;
+custom.AddAction(""확인"", ""confirm"");
+rootVisualElement.Add(custom);");
+    }
+
+    #endregion
+
     #region Picker Initializers
 
     private void InitializeColorPickerSample(VisualElement root)
     {
         if (_root == null) return;
 
+        UTKColorPicker.SetRoot(_root);
+
         _colorPreviewBox = root.Q<VisualElement>("color-preview-box");
         _colorHexLabel = root.Q<Label>("color-hex-label");
 
@@ -429,12 +800,15 @@ for (int i = 0; i < buttons.Length; i++)
         btnAsync?.RegisterCallback<ClickEvent>(_ => OpenColorPickerAsync().Forget());
 
         SetCodeSamples(root,
-            csharpCode: @"// ========================================
+            csharpCode: @"// Root 설정 (한 번만)
+UTKColorPicker.SetRoot(rootVisualElement);
+
+// ========================================
 // 1. Callback 방식
 // ========================================
 
 // Alpha 포함 (기본)
-var picker = UTKColorPicker.Show(rootVisualElement, Color.white, ""색상 선택"", useAlpha: true);
+var picker = UTKColorPicker.Show(Color.white, ""색상 선택"", useAlpha: true);
 
 // 색상 변경 이벤트 (실시간)
 picker.OnColorChanged += (color) =>
@@ -458,7 +832,6 @@ picker.OnCancelled += () =>
 
 // Alpha 없이 (RGB만)
 var pickerNoAlpha = UTKColorPicker.Show(
-    rootVisualElement,
     Color.red,
     ""색상 선택 (Alpha 없음)"",
     useAlpha: false
@@ -470,7 +843,6 @@ var pickerNoAlpha = UTKColorPicker.Show(
 
 // Alpha 포함
 Color result = await UTKColorPicker.ShowAsync(
-    rootVisualElement,
     Color.white,
     ""색상 선택 (Async)"",
     useAlpha: true
@@ -480,7 +852,6 @@ Debug.Log($""선택된 색상: #{ColorUtility.ToHtmlStringRGBA(result)}"");
 
 // Alpha 없이
 Color rgbColor = await UTKColorPicker.ShowAsync(
-    rootVisualElement,
     Color.red,
     ""RGB 색상 선택"",
     useAlpha: false
@@ -492,7 +863,6 @@ Debug.Log($""선택된 RGB: #{ColorUtility.ToHtmlStringRGB(rgbColor)}"");
 public async UniTask ChangeBackgroundColorAsync()
 {
     Color newColor = await UTKColorPicker.ShowAsync(
-        _root,
         _currentBackgroundColor,
         ""배경 색상 선택"",
         useAlpha: true
@@ -507,7 +877,7 @@ public async UniTask ChangeBackgroundColorAsync()
     {
         if (_root == null) return;
 
-        var picker = UTKColorPicker.Show(_root, _selectedColor, "Select Color", useAlpha);
+        var picker = UTKColorPicker.Show(_selectedColor, "Select Color", useAlpha);
         picker.OnColorChanged += (color) =>
         {
             if (_colorPreviewBox != null)
@@ -528,7 +898,7 @@ public async UniTask ChangeBackgroundColorAsync()
     {
         if (_root == null) return;
 
-        Color result = await UTKColorPicker.ShowAsync(_root, _selectedColor, "Select Color (Async)", useAlpha: true);
+        Color result = await UTKColorPicker.ShowAsync(_selectedColor, "Select Color (Async)", useAlpha: true);
 
         _selectedColor = result;
         if (_colorPreviewBox != null)
@@ -543,6 +913,7 @@ public async UniTask ChangeBackgroundColorAsync()
     {
         if (_root == null) return;
 
+        UTKDatePicker.SetRoot(_root);
         UTKDatePicker.SetDayNames(new[] { "일", "월", "화", "수", "목", "금", "토" });
 
         _dateLabel = root.Q<Label>("date-label");
@@ -569,7 +940,10 @@ public async UniTask ChangeBackgroundColorAsync()
         btnRangeAsync?.RegisterCallback<ClickEvent>(_ => OpenDateRangePickerAsync().Forget());
 
         SetCodeSamples(root,
-            csharpCode: @"// 요일 이름 설정 (선택사항, 한 번만)
+            csharpCode: @"// Root 설정 (한 번만)
+UTKDatePicker.SetRoot(rootVisualElement);
+
+// 요일 이름 설정 (선택사항, 한 번만)
 UTKDatePicker.SetDayNames(new[] { ""일"", ""월"", ""화"", ""수"", ""목"", ""금"", ""토"" });
 
 // ========================================
@@ -578,7 +952,6 @@ UTKDatePicker.SetDayNames(new[] { ""일"", ""월"", ""화"", ""수"", ""목"", "
 
 // Date Only
 var datePicker = UTKDatePicker.Show(
-    rootVisualElement,
     DateTime.Today,
     UTKDatePicker.PickerMode.DateOnly,
     ""날짜 선택""
@@ -596,7 +969,6 @@ datePicker.OnCancelled += () =>
 
 // Date & Time
 var dateTimePicker = UTKDatePicker.Show(
-    rootVisualElement,
     DateTime.Now,
     UTKDatePicker.PickerMode.DateAndTime,
     ""날짜 및 시간 선택""
@@ -613,7 +985,6 @@ dateTimePicker.OnDateSelected += (date) =>
 
 // Date Only
 DateTime? dateResult = await UTKDatePicker.ShowAsync(
-    rootVisualElement,
     DateTime.Today,
     UTKDatePicker.PickerMode.DateOnly,
     ""날짜 선택 (Async)""
@@ -630,7 +1001,6 @@ else
 
 // Date & Time
 DateTime? dateTimeResult = await UTKDatePicker.ShowAsync(
-    rootVisualElement,
     DateTime.Now,
     UTKDatePicker.PickerMode.DateAndTime,
     ""날짜 및 시간 선택""
@@ -646,7 +1016,6 @@ if (dateTimeResult.HasValue)
 // ========================================
 
 var rangePicker = UTKDatePicker.ShowRange(
-    rootVisualElement,
     DateTime.Today,
     DateTime.Today.AddDays(7),
     includeTime: false,
@@ -668,7 +1037,6 @@ rangePicker.OnCancelled += () =>
 // ========================================
 
 var rangeResult = await UTKDatePicker.ShowRangeAsync(
-    rootVisualElement,
     DateTime.Today,
     DateTime.Today.AddDays(7),
     includeTime: false,
@@ -686,7 +1054,6 @@ else
 
 // 시간 포함 범위 선택
 var rangeTimeResult = await UTKDatePicker.ShowRangeAsync(
-    rootVisualElement,
     DateTime.Now,
     DateTime.Now.AddDays(7),
     includeTime: true,
@@ -705,7 +1072,7 @@ if (rangeTimeResult.HasValue)
         if (_root == null) return;
 
         string title = mode == UTKDatePicker.PickerMode.DateOnly ? "Select Date" : "Select Date & Time";
-        var picker = UTKDatePicker.Show(_root, _selectedDate, mode, title);
+        var picker = UTKDatePicker.Show(_selectedDate, mode, title);
         picker.OnDateSelected += (date) =>
         {
             _selectedDate = date;
@@ -723,7 +1090,7 @@ if (rangeTimeResult.HasValue)
     {
         if (_root == null) return;
 
-        DateTime? result = await UTKDatePicker.ShowAsync(_root, _selectedDate, UTKDatePicker.PickerMode.DateOnly, "Select Date (Async)");
+        DateTime? result = await UTKDatePicker.ShowAsync(_selectedDate, UTKDatePicker.PickerMode.DateOnly, "Select Date (Async)");
 
         if (result.HasValue)
         {
@@ -742,7 +1109,7 @@ if (rangeTimeResult.HasValue)
     {
         if (_root == null) return;
 
-        var picker = UTKDatePicker.ShowRange(_root, _rangeStartDate, _rangeEndDate, false, "Select Date Range");
+        var picker = UTKDatePicker.ShowRange(_rangeStartDate, _rangeEndDate, false, "Select Date Range");
         picker.OnDateRangeSelected += (start, end) =>
         {
             _rangeStartDate = start;
@@ -757,7 +1124,7 @@ if (rangeTimeResult.HasValue)
     {
         if (_root == null) return;
 
-        var result = await UTKDatePicker.ShowRangeAsync(_root, _rangeStartDate, _rangeEndDate, false, "Select Date Range (Async)");
+        var result = await UTKDatePicker.ShowRangeAsync(_rangeStartDate, _rangeEndDate, false, "Select Date Range (Async)");
 
         if (result.HasValue)
         {
diff --git a/Assets/Sample/UIToolkit/UTKStyleGuideSample.Window.cs b/Assets/Sample/UIToolkit/UTKStyleGuideSample.Window.cs
index b364edf3..41ae2efc 100644
--- a/Assets/Sample/UIToolkit/UTKStyleGuideSample.Window.cs
+++ b/Assets/Sample/UIToolkit/UTKStyleGuideSample.Window.cs
@@ -484,6 +484,9 @@ treeWindow.Show();");
 
         container.Add(propertyWindow);
 
+        // PropertyTabListWindow 샘플도 함께 초기화 (동일 UXML 내)
+        InitializePropertyTabListWindowSample(root);
+
         SetCodeSamples(root,
             csharpCode: @"// 속성 윈도우 생성
 var propertyWindow = new UTKPropertyListWindow();
@@ -547,6 +550,87 @@ propertyWindow.Show();",
 </UXML>");
     }
 
+    private void InitializePropertyTabListWindowSample(VisualElement root)
+    {
+        var container = root.Q<VisualElement>("property-tab-list-window-container");
+        if (container == null) return;
+
+        var tabWindow = new UTKPropertyTabListWindow("속성 탭 편집기", showAllTab: true);
+        tabWindow.ShowCloseButton = true;
+        tabWindow.style.width = 320;
+        tabWindow.style.height = 600;
+
+        // 이벤트 구독
+        tabWindow.OnCloseClicked += () =>
+        {
+            Debug.Log("PropertyTabListWindow Close clicked");
+        };
+
+        tabWindow.OnTabChanged += (index, tabData) =>
+        {
+            Debug.Log($"Tab Changed: index={index}, name={tabData?.Name}");
+        };
+
+        tabWindow.OnPropertyValueChanged += args =>
+        {
+            Debug.Log($"Property Changed: {args.PropertyId} = {args.NewValue}");
+        };
+
+        // ===== 탭 1: 기본 속성 (Flat) =====
+        var generalTab = new TabPropertyData("일반");
+        generalTab.SetFlatData(new List<IUTKPropertyItem>
+        {
+            new UTKStringPropertyItem("name", "Name", "Sample Object"),
+            new UTKBoolPropertyItem("active", "Is Active", true),
+            new UTKIntPropertyItem("count", "Count", 10, 0, 100, useSlider: true),
+            new UTKFloatPropertyItem("speed", "Speed", 1.5f, 0f, 10f, useSlider: true, useStepper: true),
+            new UTKDropdownPropertyItem("type", "Type",
+                new List<string> { "Static", "Dynamic", "Kinematic" }, "Static"),
+        });
+
+        // ===== 탭 2: Transform (Grouped) =====
+        var transformTab = new TabPropertyData("트랜스폼");
+        var posGroup = new UTKPropertyGroup("position", "Position");
+        posGroup.AddItem(new UTKVector3PropertyItem("pos", "Position", Vector3.zero));
+        posGroup.AddItem(new UTKVector3PropertyItem("rot", "Rotation", Vector3.zero));
+        posGroup.AddItem(new UTKVector3PropertyItem("scl", "Scale", Vector3.one));
+
+        var physicsGroup = new UTKPropertyGroup("physics", "Physics");
+        physicsGroup.AddItem(new UTKFloatPropertyItem("mass", "Mass", 1.0f, 0f, 100f, useSlider: true));
+        physicsGroup.AddItem(new UTKBoolPropertyItem("gravity", "Use Gravity", true));
+        physicsGroup.AddItem(new UTKDropdownPropertyItem("collision", "Collision",
+            new List<string> { "Discrete", "Continuous", "ContinuousDynamic" }, "Discrete"));
+
+        transformTab.SetGroupedData(new List<IUTKPropertyGroup> { posGroup, physicsGroup });
+
+        // ===== 탭 3: 외형 (Mixed) =====
+        var appearanceTab = new TabPropertyData("외형");
+        var mixedEntries = new List<IUTKPropertyEntry>
+        {
+            new UTKColorPropertyItem("mainColor", "Main Color", Color.blue),
+            new UTKColorPropertyItem("emissionColor", "Emission", Color.yellow, useAlpha: true),
+            new UTKFloatPropertyItem("alpha", "Alpha", 1f, 0f, 1f, useSlider: true),
+        };
+
+        var materialGroup = new UTKPropertyGroup("material", "Material");
+        materialGroup.AddItem(new UTKStringPropertyItem("shader", "Shader", "Standard"));
+        materialGroup.AddItem(new UTKDropdownPropertyItem("renderQueue", "Render Queue",
+            new List<string> { "Geometry", "AlphaTest", "Transparent" }, "Geometry"));
+        mixedEntries.Add(materialGroup);
+
+        appearanceTab.SetMixedData(mixedEntries);
+
+        // ===== 탭 4: 비활성 탭 =====
+        var disabledTab = new TabPropertyData("비활성") { IsEnabled = false, Tooltip = "이 탭은 비활성 상태입니다" };
+        disabledTab.SetFlatData(new List<IUTKPropertyItem>());
+
+        // 탭 데이터 설정
+        tabWindow.SetTabData(new List<TabPropertyData> { generalTab, transformTab, appearanceTab, disabledTab });
+        tabWindow.Show();
+
+        container.Add(tabWindow);
+    }
+
     /// <summary>
     /// 모든 PropertyItem 종류를 포함하는 샘플 데이터를 생성합니다.
     /// </summary>
diff --git a/Assets/Sample/UIToolkit/UTKStyleGuideSample.cs b/Assets/Sample/UIToolkit/UTKStyleGuideSample.cs
index a85b3768..3e7affd2 100644
--- a/Assets/Sample/UIToolkit/UTKStyleGuideSample.cs
+++ b/Assets/Sample/UIToolkit/UTKStyleGuideSample.cs
@@ -97,6 +97,8 @@ public partial class UTKStyleGuideSample : MonoBehaviour
         ["UTKAlert"] = "UIToolkit/Sample/Modal/UTKAlertSample",
         ["UTKToast"] = "UIToolkit/Sample/Modal/UTKToastSample",
         ["UTKTooltip"] = "UIToolkit/Sample/Modal/UTKTooltipSample",
+        ["UTKNotification"] = "UIToolkit/Sample/Modal/UTKNotificationSample",
+        ["UTKModal"] = "UIToolkit/Sample/Modal/UTKModalSample",
         // Picker
         ["UTKColorPicker"] = "UIToolkit/Sample/Picker/UTKColorPickerSample",
         ["UTKDatePicker"] = "UIToolkit/Sample/Picker/UTKDatePickerSample",
@@ -124,7 +126,7 @@ public partial class UTKStyleGuideSample : MonoBehaviour
         ["List"] = new[] { "UTKListView", "UTKTreeView", "UTKMultiColumnListView", "UTKMultiColumnTreeView", "UTKFoldout", "UTKScrollView" },
         ["Card"] = new[] { "UTKCard", "UTKPanel" },
         ["Tab"] = new[] { "UTKTabView" },
-        ["Modal"] = new[] { "UTKAlert", "UTKToast", "UTKTooltip" },
+        ["Modal"] = new[] { "UTKAlert", "UTKToast", "UTKTooltip", "UTKNotification", "UTKModal" },
         ["Picker"] = new[] { "UTKColorPicker", "UTKDatePicker" },
         ["Menu"] = new[] { "UTKTopMenu" },
         ["ToolBar"] = new[] { "UTKToolBar" },
@@ -546,6 +548,12 @@ public partial class UTKStyleGuideSample : MonoBehaviour
             case "UTKTooltip":
                 InitializeTooltipSample(root);
                 break;
+            case "UTKNotification":
+                InitializeNotificationSample(root);
+                break;
+            case "UTKModal":
+                InitializeModalSample(root);
+                break;
             // Picker
             case "UTKColorPicker":
                 InitializeColorPickerSample(root);
diff --git a/Assets/Scripts/UVC/UIToolkit/List/UTKPropertyList.cs b/Assets/Scripts/UVC/UIToolkit/List/UTKPropertyList.cs
index f1407d90..832a84cd 100644
--- a/Assets/Scripts/UVC/UIToolkit/List/UTKPropertyList.cs
+++ b/Assets/Scripts/UVC/UIToolkit/List/UTKPropertyList.cs
@@ -195,6 +195,10 @@ namespace UVC.UIToolkit
         {
             UTKThemeManager.Instance.OnThemeChanged -= OnThemeChanged;
             UTKThemeManager.Instance.OnThemeChanged += OnThemeChanged;
+
+            // Property View에서 사용하는 Picker들의 Root를 자동 설정
+            UTKColorPicker.SetRoot(this);
+            UTKDatePicker.SetRoot(this);
         }
 
         private void OnDetachFromPanel(DetachFromPanelEvent evt)
diff --git a/Assets/Scripts/UVC/UIToolkit/List/UTKReordableList.cs b/Assets/Scripts/UVC/UIToolkit/List/UTKReordableList.cs
index e05473d6..80d3fba8 100644
--- a/Assets/Scripts/UVC/UIToolkit/List/UTKReordableList.cs
+++ b/Assets/Scripts/UVC/UIToolkit/List/UTKReordableList.cs
@@ -287,7 +287,7 @@ namespace UVC.UIToolkit
         }
 
         /// <summary>
-        /// List&lt;Dictionary&gt;로부터 데이터를 변환하여 설정합니다.
+        /// List<Dictionary>로부터 데이터를 변환하여 설정합니다.
         /// Dictionary 키: "order" (순서), "active" (사용 유무), "text" (표시 내용)
         /// </summary>
         /// <param name="listDict">변환할 Dictionary 목록.</param>
@@ -332,7 +332,7 @@ namespace UVC.UIToolkit
         }
 
         /// <summary>
-        /// 전체 아이템을 List&lt;Dictionary&lt;string, string&gt;&gt;로 변환하여 반환합니다.
+        /// 전체 아이템을 List<Dictionary<string, string>>로 변환하여 반환합니다.
         /// Dictionary 키: "order" (순서), "active" (사용 유무), "text" (표시 내용)
         /// </summary>
         /// <returns>각 아이템을 Dictionary로 변환한 목록.</returns>
diff --git a/Assets/Scripts/UVC/UIToolkit/Modal/Setting/UTKSettingDisplayInfoTabView.cs b/Assets/Scripts/UVC/UIToolkit/Modal/Setting/UTKSettingDisplayInfoTabView.cs
index 107f6377..57ed2cd4 100644
--- a/Assets/Scripts/UVC/UIToolkit/Modal/Setting/UTKSettingDisplayInfoTabView.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Modal/Setting/UTKSettingDisplayInfoTabView.cs
@@ -122,7 +122,7 @@ namespace UVC.UIToolkit
         }
 
         /// <summary>
-        /// List&lt;Dictionary&gt;로부터 데이터를 변환하여 설정합니다.
+        /// List<Dictionary>로부터 데이터를 변환하여 설정합니다.
         /// Dictionary 키: "order" (순서), "active" (사용 유무), "text" (표시 내용)
         /// </summary>
         /// <param name="listDict">변환할 Dictionary 목록.</param>
@@ -141,7 +141,7 @@ namespace UVC.UIToolkit
         }
 
         /// <summary>
-        /// 전체 아이템을 List&lt;Dictionary&lt;string, string&gt;&gt;로 변환하여 반환합니다.
+        /// 전체 아이템을 List<Dictionary<string, string>>로 변환하여 반환합니다.
         /// Dictionary 키: "order" (순서), "active" (사용 유무), "text" (표시 내용)
         /// </summary>
         /// <returns>각 아이템을 Dictionary로 변환한 목록.</returns>
diff --git a/Assets/Scripts/UVC/UIToolkit/Modal/UTKAlert.cs b/Assets/Scripts/UVC/UIToolkit/Modal/UTKAlert.cs
index 0a3d1286..6f59d2a7 100644
--- a/Assets/Scripts/UVC/UIToolkit/Modal/UTKAlert.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Modal/UTKAlert.cs
@@ -36,7 +36,6 @@ namespace UVC.UIToolkit
     /// <para><b>사용 전 초기화:</b></para>
     /// <para>
     /// Alert를 표시하기 전에 <c>UTKAlert.SetRoot(rootVisualElement)</c>로 루트를 설정해야 합니다.
-    /// 또는 <c>Show(parent, ...)</c>로 부모 요소를 직접 전달할 수 있습니다.
     /// </para>
     ///
     /// <para><b>동기 vs 비동기 호출:</b></para>
@@ -57,21 +56,21 @@ namespace UVC.UIToolkit
     /// <para><b>C# 코드에서 사용:</b></para>
     /// <code>
     /// // 초기화 (root 설정 필요)
-    /// UTKAlert.Initialize(rootVisualElement);
-    /// 
+    /// UTKAlert.SetRoot(rootVisualElement);
+    ///
     /// // 기본 알림
-    /// await UTKAlert.Show("알림", "작업이 완료되었습니다.");
-    /// 
+    /// await UTKAlert.ShowInfoAsync("알림", "작업이 완료되었습니다.");
+    ///
     /// // 확인 대화상자
-    /// bool confirmed = await UTKAlert.ShowConfirm("삭제 확인", "정말 삭제하시겠습니까?");
+    /// bool confirmed = await UTKAlert.ShowConfirmAsync("삭제 확인", "정말 삭제하시겠습니까?");
     /// if (confirmed) {
     ///     // 삭제 실행
     /// }
-    /// 
+    ///
     /// // 타입별 알림
-    /// await UTKAlert.ShowSuccess("성공", "저장되었습니다.");
-    /// await UTKAlert.ShowError("오류", "파일을 찾을 수 없습니다.");
-    /// await UTKAlert.ShowWarning("경고", "변경사항이 저장되지 않았습니다.");
+    /// await UTKAlert.ShowSuccessAsync("성공", "저장되었습니다.");
+    /// await UTKAlert.ShowErrorAsync("오류", "파일을 찾을 수 없습니다.");
+    /// await UTKAlert.ShowWarningAsync("경고", "변경사항이 저장되지 않았습니다.");
     /// </code>
     /// <para><b>UXML에서 사용:</b></para>
     /// <code>
@@ -194,7 +193,8 @@ namespace UVC.UIToolkit
 
         #region Static Methods
         /// <summary>
-        /// 기본 루트 요소 설정
+        /// 기본 루트 요소 설정.
+        /// 모든 Alert는 이 루트의 panel.visualTree에 표시됩니다.
         /// </summary>
         /// <param name="root">Alert를 표시할 기본 루트 요소</param>
         public static void SetRoot(VisualElement root)
@@ -206,65 +206,6 @@ namespace UVC.UIToolkit
         /// 기본 루트 요소 반환
         /// </summary>
         public static VisualElement? GetRoot() => _root;
-        #endregion
-
-        #region Static Factory (without parent)
-        /// <summary>
-        /// Info 알림 표시 (SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UTKAlert ShowInfo(string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            ValidateRoot();
-            return Show(_root!, title, message, AlertType.Info, onClose, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Success 알림 표시 (SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UTKAlert ShowSuccess(string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            ValidateRoot();
-            return Show(_root!, title, message, AlertType.Success, onClose, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Warning 알림 표시 (SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UTKAlert ShowWarning(string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            ValidateRoot();
-            return Show(_root!, title, message, AlertType.Warning, onClose, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Error 알림 표시 (SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UTKAlert ShowError(string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            ValidateRoot();
-            return Show(_root!, title, message, AlertType.Error, onClose, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Confirm 대화상자 표시 (SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UTKAlert ShowConfirm(string title, string message, Action? onConfirm, Action? onCancel = null, bool closeOnBlockerClick = false, string confirmLabel = "OK", string cancelLabel = "Cancel")
-        {
-            ValidateRoot();
-            var alert = Show(_root!, title, message, AlertType.Confirm, null, closeOnBlockerClick, confirmLabel, cancelLabel);
-            alert.OnConfirm = onConfirm;
-            alert.OnCancel = onCancel;
-            return alert;
-        }
-
-        /// <summary>
-        /// 알림 표시 (SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UTKAlert Show(string title, string message, AlertType type = AlertType.Info, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK", string cancelLabel = "Cancel")
-        {
-            ValidateRoot();
-            return Show(_root!, title, message, type, onClose, closeOnBlockerClick, confirmLabel, cancelLabel);
-        }
 
         private static void ValidateRoot()
         {
@@ -275,151 +216,45 @@ namespace UVC.UIToolkit
         }
         #endregion
 
-        #region Static Factory Async (without parent)
-        /// <summary>
-        /// Info 알림 표시 (비동기, SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UniTask ShowInfoAsync(string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            ValidateRoot();
-            return ShowAsync(_root!, title, message, AlertType.Info, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Success 알림 표시 (비동기, SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UniTask ShowSuccessAsync(string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            ValidateRoot();
-            return ShowAsync(_root!, title, message, AlertType.Success, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Warning 알림 표시 (비동기, SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UniTask ShowWarningAsync(string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            ValidateRoot();
-            return ShowAsync(_root!, title, message, AlertType.Warning, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Error 알림 표시 (비동기, SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UniTask ShowErrorAsync(string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            ValidateRoot();
-            return ShowAsync(_root!, title, message, AlertType.Error, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Confirm 대화상자 표시 (비동기, SetRoot로 설정된 루트 사용)
-        /// </summary>
-        /// <returns>확인 버튼 클릭 시 true, 취소 버튼 클릭 시 false</returns>
-        public static UniTask<bool> ShowConfirmAsync(string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK", string cancelLabel = "Cancel")
-        {
-            ValidateRoot();
-            return ShowConfirmAsync(_root!, title, message, closeOnBlockerClick, confirmLabel, cancelLabel);
-        }
-        #endregion
-
-        #region Static Factory Async (with parent)
-        /// <summary>
-        /// Info 알림 표시 (비동기)
-        /// </summary>
-        public static UniTask ShowInfoAsync(VisualElement parent, string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            return ShowAsync(parent, title, message, AlertType.Info, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Success 알림 표시 (비동기)
-        /// </summary>
-        public static UniTask ShowSuccessAsync(VisualElement parent, string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            return ShowAsync(parent, title, message, AlertType.Success, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Warning 알림 표시 (비동기)
-        /// </summary>
-        public static UniTask ShowWarningAsync(VisualElement parent, string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            return ShowAsync(parent, title, message, AlertType.Warning, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Error 알림 표시 (비동기)
-        /// </summary>
-        public static UniTask ShowErrorAsync(VisualElement parent, string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
-        {
-            return ShowAsync(parent, title, message, AlertType.Error, closeOnBlockerClick, confirmLabel);
-        }
-
-        /// <summary>
-        /// Confirm 대화상자 표시 (비동기)
-        /// </summary>
-        /// <returns>확인 버튼 클릭 시 true, 취소 버튼 클릭 시 false</returns>
-        public static UniTask<bool> ShowConfirmAsync(VisualElement parent, string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK", string cancelLabel = "Cancel")
-        {
-            var tcs = new UniTaskCompletionSource<bool>();
-            var alert = Show(parent, title, message, AlertType.Confirm, null, closeOnBlockerClick, confirmLabel, cancelLabel);
-            alert.OnConfirm = () => tcs.TrySetResult(true);
-            alert.OnCancel = () => tcs.TrySetResult(false);
-            alert.OnClosed = () => tcs.TrySetResult(false);
-            return tcs.Task;
-        }
-
-        /// <summary>
-        /// 알림 표시 (비동기)
-        /// </summary>
-        public static UniTask ShowAsync(VisualElement parent, string title, string message, AlertType type, bool closeOnBlockerClick = false, string confirmLabel = "OK", string cancelLabel = "Cancel")
-        {
-            var tcs = new UniTaskCompletionSource();
-            var alert = Show(parent, title, message, type, () => tcs.TrySetResult(), closeOnBlockerClick, confirmLabel, cancelLabel);
-            return tcs.Task;
-        }
-        #endregion
-
-        #region Static Factory (with parent)
+        #region Static Factory
         /// <summary>
         /// Info 알림 표시
         /// </summary>
-        public static UTKAlert ShowInfo(VisualElement parent, string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
+        public static UTKAlert ShowInfo(string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
         {
-            return Show(parent, title, message, AlertType.Info, onClose, closeOnBlockerClick, confirmLabel);
+            return Show(title, message, AlertType.Info, onClose, closeOnBlockerClick, confirmLabel);
         }
 
         /// <summary>
         /// Success 알림 표시
         /// </summary>
-        public static UTKAlert ShowSuccess(VisualElement parent, string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
+        public static UTKAlert ShowSuccess(string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
         {
-            return Show(parent, title, message, AlertType.Success, onClose, closeOnBlockerClick, confirmLabel);
+            return Show(title, message, AlertType.Success, onClose, closeOnBlockerClick, confirmLabel);
         }
 
         /// <summary>
         /// Warning 알림 표시
         /// </summary>
-        public static UTKAlert ShowWarning(VisualElement parent, string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
+        public static UTKAlert ShowWarning(string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
         {
-            return Show(parent, title, message, AlertType.Warning, onClose, closeOnBlockerClick, confirmLabel);
+            return Show(title, message, AlertType.Warning, onClose, closeOnBlockerClick, confirmLabel);
         }
 
         /// <summary>
         /// Error 알림 표시
         /// </summary>
-        public static UTKAlert ShowError(VisualElement parent, string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
+        public static UTKAlert ShowError(string title, string message, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK")
         {
-            return Show(parent, title, message, AlertType.Error, onClose, closeOnBlockerClick, confirmLabel);
+            return Show(title, message, AlertType.Error, onClose, closeOnBlockerClick, confirmLabel);
         }
 
         /// <summary>
         /// Confirm 대화상자 표시
         /// </summary>
-        public static UTKAlert ShowConfirm(VisualElement parent, string title, string message, Action? onConfirm, Action? onCancel = null, bool closeOnBlockerClick = false, string confirmLabel = "OK", string cancelLabel = "Cancel")
+        public static UTKAlert ShowConfirm(string title, string message, Action? onConfirm, Action? onCancel = null, bool closeOnBlockerClick = false, string confirmLabel = "OK", string cancelLabel = "Cancel")
         {
-            var alert = Show(parent, title, message, AlertType.Confirm, null, closeOnBlockerClick, confirmLabel, cancelLabel);
+            var alert = Show(title, message, AlertType.Confirm, null, closeOnBlockerClick, confirmLabel, cancelLabel);
             alert.OnConfirm = onConfirm;
             alert.OnCancel = onCancel;
             return alert;
@@ -428,7 +263,6 @@ namespace UVC.UIToolkit
         /// <summary>
         /// 알림 표시
         /// </summary>
-        /// <param name="parent">부모 요소</param>
         /// <param name="title">제목</param>
         /// <param name="message">메시지</param>
         /// <param name="type">알림 유형</param>
@@ -436,15 +270,17 @@ namespace UVC.UIToolkit
         /// <param name="closeOnBlockerClick">배경 클릭 시 닫힘 여부</param>
         /// <param name="confirmLabel">확인 버튼 레이블</param>
         /// <param name="cancelLabel">취소 버튼 레이블 (Confirm 타입에서만 사용)</param>
-        public static UTKAlert Show(VisualElement parent, string title, string message, AlertType type, Action? onClose, bool closeOnBlockerClick = false, string confirmLabel = "OK", string cancelLabel = "Cancel")
+        public static UTKAlert Show(string title, string message, AlertType type = AlertType.Info, Action? onClose = null, bool closeOnBlockerClick = false, string confirmLabel = "OK", string cancelLabel = "Cancel")
         {
+            ValidateRoot();
+
             var alert = new UTKAlert(title, message, type);
             alert.OnClosed = onClose;
             alert._confirmLabel = confirmLabel;
             alert._cancelLabel = cancelLabel;
             alert.UpdateButtons();
 
-            alert._blocker = UTKModalBlocker.Show(parent, 0.5f, closeOnBlockerClick);
+            alert._blocker = UTKModalBlocker.Show(_root!, 0.5f, closeOnBlockerClick);
             if (closeOnBlockerClick)
             {
                 alert._blocker.OnBlockerClicked += alert.Close;
@@ -454,7 +290,10 @@ namespace UVC.UIToolkit
                 // closeOnBlockerClick이 false일 때 blocker 클릭 시 Alert로 포커스 유지
                 alert._blocker.OnBlockerClicked += () => alert.Focus();
             }
-            alert._blocker.Add(alert);
+
+            // panel.visualTree에 직접 추가
+            var root = _root!.panel?.visualTree ?? _root!;
+            root.Add(alert);
 
             // 중앙 정렬
             alert.style.position = Position.Absolute;
@@ -463,7 +302,7 @@ namespace UVC.UIToolkit
             alert.style.translate = new Translate(Length.Percent(-50), Length.Percent(-50));
 
             // ESC 키 이벤트 등록
-            alert.RegisterEscapeKey(parent);
+            alert.RegisterEscapeKey(_root!);
 
             // Alert에 포커스 설정 (키보드 이벤트 수신을 위해)
             alert.focusable = true;
@@ -473,6 +312,64 @@ namespace UVC.UIToolkit
         }
         #endregion
 
+        #region Static Factory Async
+        /// <summary>
+        /// Info 알림 표시 (비동기)
+        /// </summary>
+        public static UniTask ShowInfoAsync(string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
+        {
+            return ShowAsync(title, message, AlertType.Info, closeOnBlockerClick, confirmLabel);
+        }
+
+        /// <summary>
+        /// Success 알림 표시 (비동기)
+        /// </summary>
+        public static UniTask ShowSuccessAsync(string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
+        {
+            return ShowAsync(title, message, AlertType.Success, closeOnBlockerClick, confirmLabel);
+        }
+
+        /// <summary>
+        /// Warning 알림 표시 (비동기)
+        /// </summary>
+        public static UniTask ShowWarningAsync(string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
+        {
+            return ShowAsync(title, message, AlertType.Warning, closeOnBlockerClick, confirmLabel);
+        }
+
+        /// <summary>
+        /// Error 알림 표시 (비동기)
+        /// </summary>
+        public static UniTask ShowErrorAsync(string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK")
+        {
+            return ShowAsync(title, message, AlertType.Error, closeOnBlockerClick, confirmLabel);
+        }
+
+        /// <summary>
+        /// Confirm 대화상자 표시 (비동기)
+        /// </summary>
+        /// <returns>확인 버튼 클릭 시 true, 취소 버튼 클릭 시 false</returns>
+        public static UniTask<bool> ShowConfirmAsync(string title, string message, bool closeOnBlockerClick = false, string confirmLabel = "OK", string cancelLabel = "Cancel")
+        {
+            var tcs = new UniTaskCompletionSource<bool>();
+            var alert = Show(title, message, AlertType.Confirm, null, closeOnBlockerClick, confirmLabel, cancelLabel);
+            alert.OnConfirm = () => tcs.TrySetResult(true);
+            alert.OnCancel = () => tcs.TrySetResult(false);
+            alert.OnClosed = () => tcs.TrySetResult(false);
+            return tcs.Task;
+        }
+
+        /// <summary>
+        /// 알림 표시 (비동기)
+        /// </summary>
+        public static UniTask ShowAsync(string title, string message, AlertType type, bool closeOnBlockerClick = false, string confirmLabel = "OK", string cancelLabel = "Cancel")
+        {
+            var tcs = new UniTaskCompletionSource();
+            var alert = Show(title, message, type, () => tcs.TrySetResult(), closeOnBlockerClick, confirmLabel, cancelLabel);
+            return tcs.Task;
+        }
+        #endregion
+
         #region UI Creation
         private void CreateUI()
         {
@@ -586,9 +483,9 @@ namespace UVC.UIToolkit
         /// <summary>
         /// ESC 키 이벤트 등록
         /// </summary>
-        private void RegisterEscapeKey(VisualElement parent)
+        private void RegisterEscapeKey(VisualElement target)
         {
-            _keyEventTarget = parent;
+            _keyEventTarget = target;
             _keyDownCallback = evt =>
             {
                 if (evt.keyCode == KeyCode.Escape)
@@ -635,6 +532,7 @@ namespace UVC.UIToolkit
         {
             UnregisterEscapeKey();
             OnClosed?.Invoke();
+            RemoveFromHierarchy();
             if (_blocker != null)
             {
                 _blocker.OnBlockerClicked -= Close;
diff --git a/Assets/Scripts/UVC/UIToolkit/Modal/UTKColorPicker.cs b/Assets/Scripts/UVC/UIToolkit/Modal/UTKColorPicker.cs
index 76614cc0..a7b31679 100644
--- a/Assets/Scripts/UVC/UIToolkit/Modal/UTKColorPicker.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Modal/UTKColorPicker.cs
@@ -49,11 +49,19 @@ namespace UVC.UIToolkit
     /// <item><description>UI 테마 - 앱 테마 색상 커스터마이징</description></item>
     /// <item><description>3D 에디터 - 머티리얼 색상 설정</description></item>
     /// </list>
+    ///
+    /// <para><b>사용 전 초기화:</b></para>
+    /// <para>
+    /// ColorPicker를 표시하기 전에 <c>UTKColorPicker.SetRoot(rootVisualElement)</c>로 루트를 설정해야 합니다.
+    /// </para>
     /// </remarks>
     /// <example>
     /// <code>
+    /// // 초기화 (root 설정 필요)
+    /// UTKColorPicker.SetRoot(rootVisualElement);
+    ///
     /// // 기본 사용법 (Alpha 포함)
-    /// var picker = UTKColorPicker.Show(rootVisualElement, Color.red, "Select Color");
+    /// var picker = UTKColorPicker.Show(Color.red, "Select Color");
     /// picker.OnColorChanged += (color) =>
     /// {
     ///     // 실시간 색상 변경 시 호출
@@ -66,10 +74,10 @@ namespace UVC.UIToolkit
     /// };
     ///
     /// // Alpha 없이 사용
-    /// var pickerNoAlpha = UTKColorPicker.Show(rootVisualElement, Color.blue, "Select Color", useAlpha: false);
+    /// var pickerNoAlpha = UTKColorPicker.Show(Color.blue, "Select Color", useAlpha: false);
     ///
     /// // async/await 사용법 (UniTask)
-    /// Color selectedColor = await UTKColorPicker.ShowAsync(rootVisualElement, Color.red, "Select Color");
+    /// Color selectedColor = await UTKColorPicker.ShowAsync(Color.red, "Select Color");
     /// // OK 클릭 시 선택된 색상 반환, 취소/닫기 시 initialColor(Color.red) 반환
     /// Debug.Log($"Result: #{ColorUtility.ToHtmlStringRGBA(selectedColor)}");
     ///
@@ -90,6 +98,8 @@ namespace UVC.UIToolkit
         #endregion
 
         #region Fields
+        private static VisualElement? _root;
+
         private bool _disposed;
         private bool _useAlpha = true;
         private bool _isUpdating; // 재귀 업데이트 방지
@@ -244,31 +254,58 @@ namespace UVC.UIToolkit
         }
         #endregion
 
+        #region Static Methods
+        /// <summary>
+        /// 기본 루트 요소 설정.
+        /// 모든 ColorPicker는 이 루트의 panel.visualTree에 표시됩니다.
+        /// </summary>
+        /// <param name="root">ColorPicker를 표시할 기본 루트 요소</param>
+        public static void SetRoot(VisualElement root)
+        {
+            _root = root;
+        }
+
+        /// <summary>
+        /// 기본 루트 요소 반환
+        /// </summary>
+        public static VisualElement? GetRoot() => _root;
+
+        private static void ValidateRoot()
+        {
+            if (_root == null)
+            {
+                throw new InvalidOperationException("UTKColorPicker.SetRoot()를 먼저 호출하여 기본 루트 요소를 설정해야 합니다.");
+            }
+        }
+        #endregion
+
         #region Static Factory
         /// <summary>
         /// 컬러 피커를 표시합니다.
         /// </summary>
         public static UTKColorPicker Show(
-            VisualElement parent,
             Color initialColor,
             string title = "Color Picker",
             bool useAlpha = true)
         {
+            ValidateRoot();
+
             var picker = new UTKColorPicker();
             picker._useAlpha = useAlpha;
             picker._originalColor = initialColor;
             picker._currentColor = initialColor;
             picker._currentHSV = new HSV(initialColor);
 
-            // 블로커 추가
-            picker._blocker = UTKModalBlocker.Show(parent, 0.5f, false);
+            // 블로커 추가 (panel.visualTree에 추가됨)
+            picker._blocker = UTKModalBlocker.Show(_root!, 0.5f, false);
             picker._blocker.OnBlockerClicked += picker.Cancel;
 
             // 위치 계산 전까지 숨김 (깜빡임 방지)
             picker.style.visibility = Visibility.Hidden;
 
-            // 피커 추가
-            parent.Add(picker);
+            // panel.visualTree에 직접 추가
+            var root = _root!.panel?.visualTree ?? _root!;
+            root.Add(picker);
 
             // UI 초기화
             picker.SetTitle(title);
@@ -283,13 +320,11 @@ namespace UVC.UIToolkit
         /// 컬러 피커를 표시하고 색상 선택을 기다립니다.
         /// OK 버튼 클릭 시 선택된 색상을 반환하고, 취소/닫기 시 initialColor를 반환합니다.
         /// </summary>
-        /// <param name="parent">부모 VisualElement</param>
         /// <param name="initialColor">초기 색상</param>
         /// <param name="title">피커 제목</param>
         /// <param name="useAlpha">알파 채널 사용 여부</param>
         /// <returns>선택된 색상 또는 초기 색상</returns>
         public static async UniTask<Color> ShowAsync(
-            VisualElement parent,
             Color initialColor,
             string title = "Color Picker",
             bool useAlpha = true)
@@ -297,7 +332,7 @@ namespace UVC.UIToolkit
             var tcs = new UniTaskCompletionSource<Color>();
             Color resultColor = initialColor;
 
-            var picker = Show(parent, initialColor, title, useAlpha);
+            var picker = Show(initialColor, title, useAlpha);
 
             picker.OnColorSelected += (color) =>
             {
diff --git a/Assets/Scripts/UVC/UIToolkit/Modal/UTKDatePicker.cs b/Assets/Scripts/UVC/UIToolkit/Modal/UTKDatePicker.cs
index 1f5283ec..5b68ba11 100644
--- a/Assets/Scripts/UVC/UIToolkit/Modal/UTKDatePicker.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Modal/UTKDatePicker.cs
@@ -65,25 +65,33 @@ namespace UVC.UIToolkit
     /// <item><description>검색 필터 - 기간별 데이터 조회</description></item>
     /// <item><description>생년월일 입력 - 회원 가입, 프로필 설정</description></item>
     /// </list>
+    ///
+    /// <para><b>사용 전 초기화:</b></para>
+    /// <para>
+    /// DatePicker를 표시하기 전에 <c>UTKDatePicker.SetRoot(rootVisualElement)</c>로 루트를 설정해야 합니다.
+    /// </para>
     /// </remarks>
     /// <example>
     /// <code>
+    /// // 초기화 (root 설정 필요)
+    /// UTKDatePicker.SetRoot(rootVisualElement);
+    ///
     /// // 기본 사용법 (날짜만)
-    /// var picker = UTKDatePicker.Show(rootVisualElement, DateTime.Today, UTKDatePicker.PickerMode.DateOnly, "Select Date");
+    /// var picker = UTKDatePicker.Show(DateTime.Today, UTKDatePicker.PickerMode.DateOnly, "Select Date");
     /// picker.OnDateSelected += (date) =>
     /// {
     ///     Debug.Log($"Date selected: {date:yyyy-MM-dd}");
     /// };
     ///
     /// // 날짜 + 시간 선택
-    /// var dateTimePicker = UTKDatePicker.Show(rootVisualElement, DateTime.Now, UTKDatePicker.PickerMode.DateAndTime, "Select Date &amp; Time");
+    /// var dateTimePicker = UTKDatePicker.Show(DateTime.Now, UTKDatePicker.PickerMode.DateAndTime, "Select Date &amp; Time");
     /// dateTimePicker.OnDateSelected += (date) =>
     /// {
     ///     Debug.Log($"DateTime selected: {date:yyyy-MM-dd HH:mm}");
     /// };
     ///
     /// // async/await 사용법 (UniTask)
-    /// DateTime? selectedDate = await UTKDatePicker.ShowAsync(rootVisualElement, DateTime.Today);
+    /// DateTime? selectedDate = await UTKDatePicker.ShowAsync(DateTime.Today);
     /// if (selectedDate.HasValue)
     /// {
     ///     Debug.Log($"Selected: {selectedDate.Value:yyyy-MM-dd}");
@@ -94,14 +102,14 @@ namespace UVC.UIToolkit
     /// }
     ///
     /// // 날짜 범위 선택
-    /// var rangePicker = UTKDatePicker.ShowRange(rootVisualElement, DateTime.Today, DateTime.Today.AddDays(7));
+    /// var rangePicker = UTKDatePicker.ShowRange(DateTime.Today, DateTime.Today.AddDays(7));
     /// rangePicker.OnDateRangeSelected += (start, end) =>
     /// {
     ///     Debug.Log($"Range selected: {start:yyyy-MM-dd} ~ {end:yyyy-MM-dd}");
     /// };
     ///
     /// // 날짜 범위 async/await 사용법
-    /// var result = await UTKDatePicker.ShowRangeAsync(rootVisualElement, DateTime.Today, DateTime.Today.AddDays(7));
+    /// var result = await UTKDatePicker.ShowRangeAsync(DateTime.Today, DateTime.Today.AddDays(7));
     /// if (result.HasValue)
     /// {
     ///     Debug.Log($"Range: {result.Value.Start:yyyy-MM-dd} ~ {result.Value.End:yyyy-MM-dd}");
@@ -157,6 +165,7 @@ namespace UVC.UIToolkit
         #endregion
 
         #region Static Fields
+        private static VisualElement? _root;
         private static string[] s_dayNameKeys = DEFAULT_DAY_NAME_KEYS;
         private static string[]? s_customDayNames;
         #endregion
@@ -267,30 +276,57 @@ namespace UVC.UIToolkit
         }
         #endregion
 
+        #region Static Methods
+        /// <summary>
+        /// 기본 루트 요소 설정.
+        /// 모든 DatePicker는 이 루트의 panel.visualTree에 표시됩니다.
+        /// </summary>
+        /// <param name="root">DatePicker를 표시할 기본 루트 요소</param>
+        public static void SetRoot(VisualElement root)
+        {
+            _root = root;
+        }
+
+        /// <summary>
+        /// 기본 루트 요소 반환
+        /// </summary>
+        public static VisualElement? GetRoot() => _root;
+
+        private static void ValidateRoot()
+        {
+            if (_root == null)
+            {
+                throw new InvalidOperationException("UTKDatePicker.SetRoot()를 먼저 호출하여 기본 루트 요소를 설정해야 합니다.");
+            }
+        }
+        #endregion
+
         #region Static Factory
         /// <summary>
         /// 날짜 피커를 표시합니다.
         /// </summary>
         public static UTKDatePicker Show(
-            VisualElement parent,
             DateTime initialDate,
             PickerMode mode = PickerMode.DateOnly,
             string title = "Select Date")
         {
+            ValidateRoot();
+
             var picker = new UTKDatePicker();
             picker._mode = mode;
             picker._selectedDate = initialDate;
             picker._displayMonth = new DateTime(initialDate.Year, initialDate.Month, 1);
 
-            // 블로커 추가
-            picker._blocker = UTKModalBlocker.Show(parent, 0.5f, false);
+            // 블로커 추가 (panel.visualTree에 추가됨)
+            picker._blocker = UTKModalBlocker.Show(_root!, 0.5f, false);
             picker._blocker.OnBlockerClicked += picker.Close;
 
             // 위치 계산 전까지 숨김 (깜빡임 방지)
             picker.style.visibility = Visibility.Hidden;
 
-            // 피커 추가
-            parent.Add(picker);
+            // panel.visualTree에 직접 추가
+            var root = _root!.panel?.visualTree ?? _root!;
+            root.Add(picker);
 
             // UI 초기화
             picker.SetTitle(title);
@@ -306,7 +342,6 @@ namespace UVC.UIToolkit
         /// 날짜 피커를 표시하고 날짜 선택을 기다립니다.
         /// OK 버튼 클릭 시 선택된 날짜를 반환하고, 취소/닫기 시 null을 반환합니다.
         /// </summary>
-        /// <param name="parent">부모 VisualElement</param>
         /// <param name="initialDate">초기 날짜</param>
         /// <param name="mode">피커 모드 (날짜만 또는 날짜+시간)</param>
         /// <param name="title">피커 제목</param>
@@ -314,7 +349,7 @@ namespace UVC.UIToolkit
         /// <example>
         /// <code>
         /// // async/await 사용법
-        /// DateTime? selectedDate = await UTKDatePicker.ShowAsync(rootVisualElement, DateTime.Today);
+        /// DateTime? selectedDate = await UTKDatePicker.ShowAsync(DateTime.Today);
         /// if (selectedDate.HasValue)
         /// {
         ///     Debug.Log($"Selected: {selectedDate.Value:yyyy-MM-dd}");
@@ -326,7 +361,6 @@ namespace UVC.UIToolkit
         /// </code>
         /// </example>
         public static async UniTask<DateTime?> ShowAsync(
-            VisualElement parent,
             DateTime initialDate,
             PickerMode mode = PickerMode.DateOnly,
             string title = "Select Date")
@@ -334,7 +368,7 @@ namespace UVC.UIToolkit
             var tcs = new UniTaskCompletionSource<DateTime?>();
             DateTime? resultDate = null;
 
-            var picker = Show(parent, initialDate, mode, title);
+            var picker = Show(initialDate, mode, title);
 
             picker.OnDateSelected += (date) =>
             {
@@ -354,18 +388,18 @@ namespace UVC.UIToolkit
         /// <summary>
         /// 날짜 범위 피커를 표시합니다.
         /// </summary>
-        /// <param name="parent">부모 VisualElement</param>
         /// <param name="initialStartDate">초기 시작 날짜 (null이면 오늘)</param>
         /// <param name="initialEndDate">초기 종료 날짜 (null이면 시작 날짜와 동일)</param>
         /// <param name="includeTime">시간 선택 포함 여부</param>
         /// <param name="title">피커 제목</param>
         public static UTKDatePicker ShowRange(
-            VisualElement parent,
             DateTime? initialStartDate = null,
             DateTime? initialEndDate = null,
             bool includeTime = false,
             string title = "Select Date Range")
         {
+            ValidateRoot();
+
             var picker = new UTKDatePicker();
             picker._mode = includeTime ? PickerMode.DateTimeRange : PickerMode.DateRange;
 
@@ -383,15 +417,16 @@ namespace UVC.UIToolkit
             picker._rangeState = RangeSelectionState.SelectingStart;
             picker._displayMonth = new DateTime(startDate.Year, startDate.Month, 1);
 
-            // 블로커 추가
-            picker._blocker = UTKModalBlocker.Show(parent, 0.5f, false);
+            // 블로커 추가 (panel.visualTree에 추가됨)
+            picker._blocker = UTKModalBlocker.Show(_root!, 0.5f, false);
             picker._blocker.OnBlockerClicked += picker.Close;
 
             // 위치 계산 전까지 숨김 (깜빡임 방지)
             picker.style.visibility = Visibility.Hidden;
 
-            // 피커 추가
-            parent.Add(picker);
+            // panel.visualTree에 직접 추가
+            var root = _root!.panel?.visualTree ?? _root!;
+            root.Add(picker);
 
             // UI 초기화
             picker.SetTitle(title);
@@ -408,7 +443,6 @@ namespace UVC.UIToolkit
         /// 날짜 범위 피커를 표시하고 범위 선택을 기다립니다.
         /// OK 버튼 클릭 시 선택된 범위를 반환하고, 취소/닫기 시 null을 반환합니다.
         /// </summary>
-        /// <param name="parent">부모 VisualElement</param>
         /// <param name="initialStartDate">초기 시작 날짜</param>
         /// <param name="initialEndDate">초기 종료 날짜</param>
         /// <param name="includeTime">시간 선택 포함 여부</param>
@@ -417,7 +451,7 @@ namespace UVC.UIToolkit
         /// <example>
         /// <code>
         /// // async/await 사용법
-        /// var result = await UTKDatePicker.ShowRangeAsync(rootVisualElement);
+        /// var result = await UTKDatePicker.ShowRangeAsync();
         /// if (result.HasValue)
         /// {
         ///     Debug.Log($"Range: {result.Value.Start:yyyy-MM-dd} ~ {result.Value.End:yyyy-MM-dd}");
@@ -429,7 +463,6 @@ namespace UVC.UIToolkit
         /// </code>
         /// </example>
         public static async UniTask<(DateTime Start, DateTime End)?> ShowRangeAsync(
-            VisualElement parent,
             DateTime? initialStartDate = null,
             DateTime? initialEndDate = null,
             bool includeTime = false,
@@ -438,7 +471,7 @@ namespace UVC.UIToolkit
             var tcs = new UniTaskCompletionSource<(DateTime, DateTime)?>();
             (DateTime, DateTime)? result = null;
 
-            var picker = ShowRange(parent, initialStartDate, initialEndDate, includeTime, title);
+            var picker = ShowRange(initialStartDate, initialEndDate, includeTime, title);
 
             picker.OnDateRangeSelected += (start, end) =>
             {
diff --git a/Assets/Scripts/UVC/UIToolkit/Modal/UTKModal.cs b/Assets/Scripts/UVC/UIToolkit/Modal/UTKModal.cs
index 4aec0c33..e261d92e 100644
--- a/Assets/Scripts/UVC/UIToolkit/Modal/UTKModal.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Modal/UTKModal.cs
@@ -9,25 +9,29 @@ namespace UVC.UIToolkit
     /// 모달 창 컴포넌트.
     /// 사용자 정의 콘텐츠를 포함할 수 있는 모달 대화상자입니다.
     /// </summary>
+    /// <remarks>
+    /// <para><b>사용 전 초기화:</b></para>
+    /// <para>
+    /// Modal을 표시하기 전에 <c>UTKModal.SetRoot(rootVisualElement)</c>로 루트를 설정해야 합니다.
+    /// </para>
+    /// </remarks>
     /// <example>
     /// <para><b>C# 코드에서 사용:</b></para>
     /// <code>
-    /// // 모달 생성 및 표시
-    /// var modal = new UTKModal();
-    /// modal.Title = "설정";
-    /// modal.Size = UTKModal.ModalSize.Medium;
+    /// // 초기화 (root 설정 필요)
+    /// UTKModal.SetRoot(rootVisualElement);
+    ///
+    /// // Static Factory로 표시
+    /// var modal = UTKModal.Show("설정", UTKModal.ModalSize.Medium);
     /// modal.OnClosed += () => Debug.Log("모달 닫힘");
-    /// 
+    ///
     /// // 콘텐츠 추가
     /// var content = new Label("모달 내용");
-    /// modal.AddContent(content);
-    /// 
-    /// // 푸터 버튼 추가
-    /// modal.AddFooterButton("확인", UTKButton.ButtonVariant.Primary, () => modal.Close());
-    /// modal.AddFooterButton("취소", UTKButton.ButtonVariant.Normal, () => modal.Close());
-    /// 
-    /// // 표시
-    /// modal.Show(rootElement);
+    /// modal.Add(content);
+    ///
+    /// // 푸터에 버튼 추가
+    /// modal.AddToFooter(new UTKButton("확인", "", UTKButton.ButtonVariant.Primary));
+    /// modal.AddToFooter(new UTKButton("취소", "", UTKButton.ButtonVariant.Normal));
     /// </code>
     /// <para><b>UXML에서 사용:</b></para>
     /// <code>
@@ -46,17 +50,19 @@ namespace UVC.UIToolkit
         #endregion
 
         #region Fields
+        private static VisualElement? _root;
+
         private bool _disposed;
         private UTKModalBlocker? _blocker;
         private VisualElement? _header;
         private Label? _titleLabel;
-        private Button? _closeButton;
+        private UTKButton? _closeButton;
         private VisualElement? _content;
         private VisualElement? _footer;
 
         private string _title = "Modal";
         private bool _showCloseButton = true;
-        private bool _closeOnBackdropClick = true;
+        private bool _closeOnBackdropClick = false;
         private ModalSize _size = ModalSize.Medium;
         #endregion
 
@@ -153,20 +159,50 @@ namespace UVC.UIToolkit
         }
         #endregion
 
+        #region Static Methods
+        /// <summary>
+        /// 기본 루트 요소 설정.
+        /// 모든 Modal은 이 루트의 panel.visualTree에 표시됩니다.
+        /// </summary>
+        /// <param name="root">Modal을 표시할 기본 루트 요소</param>
+        public static void SetRoot(VisualElement root)
+        {
+            _root = root;
+        }
+
+        /// <summary>
+        /// 기본 루트 요소 반환
+        /// </summary>
+        public static VisualElement? GetRoot() => _root;
+
+        private static void ValidateRoot()
+        {
+            if (_root == null)
+            {
+                throw new InvalidOperationException("UTKModal.SetRoot()를 먼저 호출하여 기본 루트 요소를 설정해야 합니다.");
+            }
+        }
+        #endregion
+
         #region Static Factory
         /// <summary>
         /// 모달 표시
         /// </summary>
-        public static UTKModal Show(VisualElement parent, string title, ModalSize size = ModalSize.Medium)
+        public static UTKModal Show(string title, ModalSize size = ModalSize.Medium)
         {
+            ValidateRoot();
+
             var modal = new UTKModal(title, size);
 
-            modal._blocker = UTKModalBlocker.Show(parent, 0.5f, false);
+            modal._blocker = UTKModalBlocker.Show(_root!, 0.5f, false);
             if (modal._closeOnBackdropClick)
             {
                 modal._blocker.OnBlockerClicked += modal.Close;
             }
-            modal._blocker.Add(modal);
+
+            // panel.visualTree에 직접 추가
+            var root = _root!.panel?.visualTree ?? _root!;
+            root.Add(modal);
 
             // 중앙 정렬
             modal.style.position = Position.Absolute;
@@ -192,7 +228,10 @@ namespace UVC.UIToolkit
             _titleLabel.AddToClassList("utk-modal__title");
             _header.Add(_titleLabel);
 
-            _closeButton = new Button { name = "close-btn", text = "✕" };
+            _closeButton = new UTKButton("close-btn", UTKMaterialIcons.Close);
+            _closeButton.Variant = UTKButton.ButtonVariant.Text;
+            _closeButton.IconOnly = true;
+            _closeButton.IconSize = 16;
             _closeButton.AddToClassList("utk-modal__close-btn");
             _header.Add(_closeButton);
 
@@ -299,6 +338,7 @@ namespace UVC.UIToolkit
         public void Close()
         {
             OnClosed?.Invoke();
+            RemoveFromHierarchy();
             if (_blocker != null)
             {
                 _blocker.OnBlockerClicked -= Close;
diff --git a/Assets/Scripts/UVC/UIToolkit/Modal/UTKModalBlocker.cs b/Assets/Scripts/UVC/UIToolkit/Modal/UTKModalBlocker.cs
index 1061571a..305e75bb 100644
--- a/Assets/Scripts/UVC/UIToolkit/Modal/UTKModalBlocker.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Modal/UTKModalBlocker.cs
@@ -55,12 +55,13 @@ namespace UVC.UIToolkit
         #region Static Factory
         /// <summary>
         /// 모달 블로커를 생성하고 표시합니다.
+        /// parent의 panel.visualTree에 블로커를 추가합니다.
         /// </summary>
-        /// <param name="root">블로커를 추가할 루트 요소</param>
+        /// <param name="parent">panel 접근용 부모 요소</param>
         /// <param name="opacity">배경 투명도 (0~1)</param>
         /// <param name="closeOnClick">클릭 시 자동 닫힘 여부</param>
         /// <returns>생성된 UTKModalBlocker 인스턴스</returns>
-        public static UTKModalBlocker Show(VisualElement root, float opacity = DEFAULT_OPACITY, bool closeOnClick = false)
+        public static UTKModalBlocker Show(VisualElement parent, float opacity = DEFAULT_OPACITY, bool closeOnClick = false)
         {
             var blocker = new UTKModalBlocker
             {
@@ -68,6 +69,7 @@ namespace UVC.UIToolkit
                 _targetOpacity = Mathf.Clamp01(opacity)
             };
 
+            var root = parent.panel?.visualTree ?? parent;
             root.Add(blocker);
             blocker.FadeIn();
 
diff --git a/Assets/Scripts/UVC/UIToolkit/Modal/UTKNotification.cs b/Assets/Scripts/UVC/UIToolkit/Modal/UTKNotification.cs
index 55a4d18d..b7f9225b 100644
--- a/Assets/Scripts/UVC/UIToolkit/Modal/UTKNotification.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Modal/UTKNotification.cs
@@ -10,28 +10,26 @@ namespace UVC.UIToolkit
     /// 알림 창 컴포넌트.
     /// 화면 모서리에 표시되는 알림 메시지입니다.
     /// </summary>
+    /// <remarks>
+    /// <para><b>사용 전 초기화:</b></para>
+    /// <para>
+    /// Notification을 표시하기 전에 <c>UTKNotification.SetRoot(rootVisualElement)</c>로 루트를 설정해야 합니다.
+    /// </para>
+    /// </remarks>
     /// <example>
     /// <para><b>C# 코드에서 사용:</b></para>
     /// <code>
     /// // 초기화 (root 설정 필요)
-    /// UTKNotification.Initialize(rootVisualElement);
-    /// 
+    /// UTKNotification.SetRoot(rootVisualElement);
+    ///
     /// // 기본 알림
-    /// UTKNotification.Show("알림", "새로운 메시지가 있습니다.");
-    /// 
+    /// UTKNotification.Show("알림", "새로운 메시지가 있습니다.",
+    ///     NotificationType.Info, NotificationPosition.TopRight);
+    ///
     /// // 타입별 알림
     /// UTKNotification.ShowSuccess("성공", "저장되었습니다.");
     /// UTKNotification.ShowError("오류", "실패했습니다.");
     /// UTKNotification.ShowWarning("경고", "주의가 필요합니다.");
-    /// 
-    /// // 위치 설정
-    /// UTKNotification.Show("알림", "메시지", position: NotificationPosition.BottomRight);
-    /// 
-    /// // 액션 버튼 있는 알림
-    /// UTKNotification.Show("알림", "메시지", actions: new[] {
-    ///     ("확인", () => Debug.Log("확인")),
-    ///     ("취소", () => Debug.Log("취소"))
-    /// });
     /// </code>
     /// <para><b>UXML에서 사용:</b></para>
     /// <code>
@@ -50,11 +48,13 @@ namespace UVC.UIToolkit
         #endregion
 
         #region Fields
+        private static VisualElement? _root;
+
         private bool _disposed;
         private VisualElement? _header;
-        private Label? _iconLabel;
+        private UTKLabel? _iconLabel;
         private Label? _titleLabel;
-        private Button? _closeButton;
+        private UTKButton? _closeButton;
         private Label? _messageLabel;
         private VisualElement? _actions;
 
@@ -175,50 +175,79 @@ namespace UVC.UIToolkit
         }
         #endregion
 
+        #region Static Methods
+        /// <summary>
+        /// 기본 루트 요소 설정.
+        /// 모든 Notification은 이 루트의 panel.visualTree에 표시됩니다.
+        /// </summary>
+        /// <param name="root">Notification을 표시할 기본 루트 요소</param>
+        public static void SetRoot(VisualElement root)
+        {
+            _root = root;
+        }
+
+        /// <summary>
+        /// 기본 루트 요소 반환
+        /// </summary>
+        public static VisualElement? GetRoot() => _root;
+
+        private static void ValidateRoot()
+        {
+            if (_root == null)
+            {
+                throw new InvalidOperationException("UTKNotification.SetRoot()를 먼저 호출하여 기본 루트 요소를 설정해야 합니다.");
+            }
+        }
+        #endregion
+
         #region Static Factory
         /// <summary>
         /// Info 알림 표시
         /// </summary>
-        public static UTKNotification ShowInfo(VisualElement parent, string title, string message, int duration = DEFAULT_DURATION_MS)
+        public static UTKNotification ShowInfo(string title, string message, int duration = DEFAULT_DURATION_MS)
         {
-            return Show(parent, title, message, NotificationType.Info, NotificationPosition.TopRight, duration);
+            return Show(title, message, NotificationType.Info, NotificationPosition.TopRight, duration);
         }
 
         /// <summary>
         /// Success 알림 표시
         /// </summary>
-        public static UTKNotification ShowSuccess(VisualElement parent, string title, string message, int duration = DEFAULT_DURATION_MS)
+        public static UTKNotification ShowSuccess(string title, string message, int duration = DEFAULT_DURATION_MS)
         {
-            return Show(parent, title, message, NotificationType.Success, NotificationPosition.TopRight, duration);
+            return Show(title, message, NotificationType.Success, NotificationPosition.TopRight, duration);
         }
 
         /// <summary>
         /// Warning 알림 표시
         /// </summary>
-        public static UTKNotification ShowWarning(VisualElement parent, string title, string message, int duration = DEFAULT_DURATION_MS)
+        public static UTKNotification ShowWarning(string title, string message, int duration = DEFAULT_DURATION_MS)
         {
-            return Show(parent, title, message, NotificationType.Warning, NotificationPosition.TopRight, duration);
+            return Show(title, message, NotificationType.Warning, NotificationPosition.TopRight, duration);
         }
 
         /// <summary>
         /// Error 알림 표시
         /// </summary>
-        public static UTKNotification ShowError(VisualElement parent, string title, string message, int duration = DEFAULT_DURATION_MS)
+        public static UTKNotification ShowError(string title, string message, int duration = DEFAULT_DURATION_MS)
         {
-            return Show(parent, title, message, NotificationType.Error, NotificationPosition.TopRight, duration);
+            return Show(title, message, NotificationType.Error, NotificationPosition.TopRight, duration);
         }
 
         /// <summary>
         /// 알림 표시
         /// </summary>
-        public static UTKNotification Show(VisualElement parent, string title, string message,
+        public static UTKNotification Show(string title, string message,
             NotificationType type, NotificationPosition position, int duration = DEFAULT_DURATION_MS)
         {
+            ValidateRoot();
+
             var notification = new UTKNotification(title, message, type);
             notification._duration = duration;
             notification._position = position;
 
-            parent.Add(notification);
+            // panel.visualTree에 직접 추가
+            var root = _root!.panel?.visualTree ?? _root!;
+            root.Add(notification);
 
             // 위치 설정
             notification.style.position = UnityEngine.UIElements.Position.Absolute;
@@ -244,18 +273,20 @@ namespace UVC.UIToolkit
             _header.AddToClassList("utk-notification__header");
             Add(_header);
 
-            _iconLabel = new Label { name = "icon" };
+            _iconLabel = new UTKLabel();
+            _iconLabel.IconSize = 16;
             _iconLabel.AddToClassList("utk-notification__icon");
-            UTKMaterialIcons.ApplyIconStyle(_iconLabel, 20);
             _header.Add(_iconLabel);
 
             _titleLabel = new Label { name = "title" };
             _titleLabel.AddToClassList("utk-notification__title");
             _header.Add(_titleLabel);
 
-            _closeButton = new Button { name = "close-btn", text = UTKMaterialIcons.Close };
+            _closeButton = new UTKButton("close-btn", UTKMaterialIcons.Close);
+            _closeButton.Variant = UTKButton.ButtonVariant.Text;
+            _closeButton.IconOnly = true;
+            _closeButton.IconSize = 16;
             _closeButton.AddToClassList("utk-notification__close-btn");
-            UTKMaterialIcons.ApplyIconStyle(_closeButton, 16);
             _closeButton.RegisterCallback<ClickEvent>(_ => Close());
             _header.Add(_closeButton);
 
@@ -325,13 +356,13 @@ namespace UVC.UIToolkit
 
             if (_iconLabel != null)
             {
-                _iconLabel.text = _type switch
+                _iconLabel.SetMaterialIcon(_type switch
                 {
                     NotificationType.Success => UTKMaterialIcons.CheckCircle,
                     NotificationType.Warning => UTKMaterialIcons.Warning,
                     NotificationType.Error => UTKMaterialIcons.Error,
                     _ => UTKMaterialIcons.Info
-                };
+                });
             }
         }
 
diff --git a/Assets/Scripts/UVC/UIToolkit/Modal/UTKToast.cs b/Assets/Scripts/UVC/UIToolkit/Modal/UTKToast.cs
index ad5ab48d..98d65632 100644
--- a/Assets/Scripts/UVC/UIToolkit/Modal/UTKToast.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Modal/UTKToast.cs
@@ -42,7 +42,6 @@ namespace UVC.UIToolkit
     /// <para><b>사용 전 초기화:</b></para>
     /// <para>
     /// Toast를 표시하기 전에 <c>UTKToast.SetRoot(rootVisualElement)</c>로 루트를 설정해야 합니다.
-    /// 또는 <c>Show(parent, ...)</c>로 부모 요소를 직접 전달할 수 있습니다.
     /// </para>
     ///
     /// <para><b>실제 활용 예시:</b></para>
@@ -57,7 +56,7 @@ namespace UVC.UIToolkit
     /// <para><b>C# 코드에서 사용:</b></para>
     /// <code>
     /// // 초기화 (root 설정 필요)
-    /// UTKToast.Initialize(rootVisualElement);
+    /// UTKToast.SetRoot(rootVisualElement);
     /// 
     /// // 기본 토스트
     /// UTKToast.Show("저장되었습니다.");
@@ -213,95 +212,52 @@ namespace UVC.UIToolkit
         }
         #endregion
 
-        #region Static Factory (without parent)
-        /// <summary>
-        /// Info 토스트 표시 (SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UTKToast ShowInfo(string message, int duration = DEFAULT_DURATION_MS)
-        {
-            ValidateRoot();
-            return Show(_root!, message, ToastType.Info, duration);
-        }
-
-        /// <summary>
-        /// Success 토스트 표시 (SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UTKToast ShowSuccess(string message, int duration = DEFAULT_DURATION_MS)
-        {
-            ValidateRoot();
-            return Show(_root!, message, ToastType.Success, duration);
-        }
-
-        /// <summary>
-        /// Warning 토스트 표시 (SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UTKToast ShowWarning(string message, int duration = DEFAULT_DURATION_MS)
-        {
-            ValidateRoot();
-            return Show(_root!, message, ToastType.Warning, duration);
-        }
-
-        /// <summary>
-        /// Error 토스트 표시 (SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UTKToast ShowError(string message, int duration = DEFAULT_DURATION_MS)
-        {
-            ValidateRoot();
-            return Show(_root!, message, ToastType.Error, duration);
-        }
-
-        /// <summary>
-        /// 토스트 표시 (SetRoot로 설정된 루트 사용)
-        /// </summary>
-        public static UTKToast Show(string message, ToastType type = ToastType.Info, int duration = DEFAULT_DURATION_MS)
-        {
-            ValidateRoot();
-            return Show(_root!, message, type, duration);
-        }
-        #endregion
-
-        #region Static Factory (with parent)
+        #region Static Factory
         /// <summary>
         /// Info 토스트 표시
         /// </summary>
-        public static UTKToast ShowInfo(VisualElement parent, string message, int duration = DEFAULT_DURATION_MS)
+        public static UTKToast ShowInfo(string message, int duration = DEFAULT_DURATION_MS)
         {
-            return Show(parent, message, ToastType.Info, duration);
+            return Show(message, ToastType.Info, duration);
         }
 
         /// <summary>
         /// Success 토스트 표시
         /// </summary>
-        public static UTKToast ShowSuccess(VisualElement parent, string message, int duration = DEFAULT_DURATION_MS)
+        public static UTKToast ShowSuccess(string message, int duration = DEFAULT_DURATION_MS)
         {
-            return Show(parent, message, ToastType.Success, duration);
+            return Show(message, ToastType.Success, duration);
         }
 
         /// <summary>
         /// Warning 토스트 표시
         /// </summary>
-        public static UTKToast ShowWarning(VisualElement parent, string message, int duration = DEFAULT_DURATION_MS)
+        public static UTKToast ShowWarning(string message, int duration = DEFAULT_DURATION_MS)
         {
-            return Show(parent, message, ToastType.Warning, duration);
+            return Show(message, ToastType.Warning, duration);
         }
 
         /// <summary>
         /// Error 토스트 표시
         /// </summary>
-        public static UTKToast ShowError(VisualElement parent, string message, int duration = DEFAULT_DURATION_MS)
+        public static UTKToast ShowError(string message, int duration = DEFAULT_DURATION_MS)
         {
-            return Show(parent, message, ToastType.Error, duration);
+            return Show(message, ToastType.Error, duration);
         }
 
         /// <summary>
         /// 토스트 표시
         /// </summary>
-        public static UTKToast Show(VisualElement parent, string message, ToastType type, int duration = DEFAULT_DURATION_MS)
+        public static UTKToast Show(string message, ToastType type = ToastType.Info, int duration = DEFAULT_DURATION_MS)
         {
+            ValidateRoot();
+
             var toast = new UTKToast(message, type);
             toast._duration = duration;
 
-            parent.Add(toast);
+            // panel.visualTree에 직접 추가
+            var root = _root!.panel?.visualTree ?? _root!;
+            root.Add(toast);
 
             // 하단 중앙 정렬
             toast.style.position = Position.Absolute;
diff --git a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKColorPropertyItemView.cs b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKColorPropertyItemView.cs
index 5a3dd997..376fc06b 100644
--- a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKColorPropertyItemView.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKColorPropertyItemView.cs
@@ -238,13 +238,7 @@ namespace UVC.UIToolkit
         {
             if (_currentPicker != null) return;
 
-            var root = this as VisualElement;
-            while (root.parent != null)
-            {
-                root = root.parent;
-            }
-
-            _currentPicker = UTKColorPicker.Show(root, _value, Label, _useAlpha);
+            _currentPicker = UTKColorPicker.Show(_value, Label, _useAlpha);
             _currentPicker.OnColorChanged += OnPickerColorChanged;
             _currentPicker.OnColorSelected += OnPickerColorSelected;
         }
diff --git a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKColorStatePropertyItemView.cs b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKColorStatePropertyItemView.cs
index 54f0ed9c..69dfd2c1 100644
--- a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKColorStatePropertyItemView.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKColorStatePropertyItemView.cs
@@ -202,10 +202,7 @@ namespace UVC.UIToolkit
         {
             if (_currentPicker != null) return;
 
-            var root = this as VisualElement;
-            while (root.parent != null) root = root.parent;
-
-            _currentPicker = UTKColorPicker.Show(root, _value.Color, $"{Label} - {_value.State}", false);
+            _currentPicker = UTKColorPicker.Show(_value.Color, $"{Label} - {_value.State}", false);
             _currentPicker.OnColorChanged += OnPickerColorChanged;
             _currentPicker.OnColorSelected += OnPickerColorSelected;
         }
diff --git a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDatePropertyItemView.cs b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDatePropertyItemView.cs
index 7ce6fd7c..162e9637 100644
--- a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDatePropertyItemView.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDatePropertyItemView.cs
@@ -207,13 +207,7 @@ namespace UVC.UIToolkit
         {
             if (_currentPicker != null) return;
 
-            var root = this as VisualElement;
-            while (root.parent != null)
-            {
-                root = root.parent;
-            }
-
-            _currentPicker = UTKDatePicker.Show(root, _value, UTKDatePicker.PickerMode.DateOnly, Label);
+            _currentPicker = UTKDatePicker.Show(_value, UTKDatePicker.PickerMode.DateOnly, Label);
             _currentPicker.OnDateSelected += OnPickerDateSelected;
             _currentPicker.OnClosed += OnPickerClosed;
         }
diff --git a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateRangePropertyItemView.cs b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateRangePropertyItemView.cs
index bc2b9351..3514cbc3 100644
--- a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateRangePropertyItemView.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateRangePropertyItemView.cs
@@ -299,11 +299,8 @@ namespace UVC.UIToolkit
         {
             if (_currentPicker != null) return;
 
-            var root = this as VisualElement;
-            while (root.parent != null) root = root.parent;
-
             string title = _isEditingStart ? $"{Label} - 시작일" : $"{Label} - 종료일";
-            _currentPicker = UTKDatePicker.Show(root, initialDate, UTKDatePicker.PickerMode.DateOnly, title);
+            _currentPicker = UTKDatePicker.Show(initialDate, UTKDatePicker.PickerMode.DateOnly, title);
             _currentPicker.OnDateSelected += OnPickerDateSelected;
             _currentPicker.OnClosed += OnPickerClosed;
         }
diff --git a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateTimePropertyItemView.cs b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateTimePropertyItemView.cs
index a8f30c50..d648f002 100644
--- a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateTimePropertyItemView.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateTimePropertyItemView.cs
@@ -207,13 +207,7 @@ namespace UVC.UIToolkit
         {
             if (_currentPicker != null) return;
 
-            var root = this as VisualElement;
-            while (root.parent != null)
-            {
-                root = root.parent;
-            }
-
-            _currentPicker = UTKDatePicker.Show(root, _value, UTKDatePicker.PickerMode.DateAndTime, Label);
+            _currentPicker = UTKDatePicker.Show(_value, UTKDatePicker.PickerMode.DateAndTime, Label);
             _currentPicker.OnDateSelected += OnPickerDateSelected;
             _currentPicker.OnClosed += OnPickerClosed;
         }
diff --git a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateTimeRangePropertyItemView.cs b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateTimeRangePropertyItemView.cs
index d56e3f5b..1c80b366 100644
--- a/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateTimeRangePropertyItemView.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Property/Views/UTKDateTimeRangePropertyItemView.cs
@@ -299,11 +299,8 @@ namespace UVC.UIToolkit
         {
             if (_currentPicker != null) return;
 
-            var root = this as VisualElement;
-            while (root.parent != null) root = root.parent;
-
             string title = _isEditingStart ? $"{Label} - 시작" : $"{Label} - 종료";
-            _currentPicker = UTKDatePicker.Show(root, initialDateTime, UTKDatePicker.PickerMode.DateAndTime, title);
+            _currentPicker = UTKDatePicker.Show(initialDateTime, UTKDatePicker.PickerMode.DateAndTime, title);
             _currentPicker.OnDateSelected += OnPickerDateSelected;
             _currentPicker.OnClosed += OnPickerClosed;
         }
diff --git a/Assets/Scripts/UVC/UIToolkit/Window/UTKPropertyTabListWindow.cs b/Assets/Scripts/UVC/UIToolkit/Window/UTKPropertyTabListWindow.cs
index 442773fd..1f208d21 100644
--- a/Assets/Scripts/UVC/UIToolkit/Window/UTKPropertyTabListWindow.cs
+++ b/Assets/Scripts/UVC/UIToolkit/Window/UTKPropertyTabListWindow.cs
@@ -29,15 +29,15 @@ namespace UVC.UIToolkit
     /// window.ShowAllTab = false;
     ///
     /// var generalTab = new TabPropertyData("일반");
-    /// generalTab.SetGroupedData(new List&lt;IUTKPropertyGroup&gt; { transformGroup, renderGroup });
+    /// generalTab.SetGroupedData(new List<IUTKPropertyGroup> { transformGroup, renderGroup });
     ///
     /// var advancedTab = new TabPropertyData("고급");
-    /// advancedTab.SetFlatData(new List&lt;IUTKPropertyItem&gt; { debugItem, logItem });
+    /// advancedTab.SetFlatData(new List<IUTKPropertyItem> { debugItem, logItem });
     ///
-    /// window.SetTabData(new List&lt;TabPropertyData&gt; { generalTab, advancedTab });
+    /// window.SetTabData(new List<TabPropertyData> { generalTab, advancedTab });
     ///
-    /// window.OnTabChanged += (index, data) =&gt; Debug.Log($"탭 변경: {data?.Name}");
-    /// window.OnPropertyValueChanged += args =&gt; Debug.Log($"{args.PropertyId} = {args.NewValue}");
+    /// window.OnTabChanged += (index, data) => Debug.Log($"탭 변경: {data?.Name}");
+    /// window.OnPropertyValueChanged += args => Debug.Log($"{args.PropertyId} = {args.NewValue}");
     ///
     /// root.Add(window);
     /// </code>