diff --git a/.idea/.idea.HALLUCINATE/.idea/workspace.xml b/.idea/.idea.HALLUCINATE/.idea/workspace.xml
index 8c0898b0..94dd0991 100644
--- a/.idea/.idea.HALLUCINATE/.idea/workspace.xml
+++ b/.idea/.idea.HALLUCINATE/.idea/workspace.xml
@@ -11,21 +11,12 @@
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
   <component name="EmbeddingIndexingInfo">
-    <option name="cachedIndexableFilesCount" value="1" />
+    <option name="cachedIndexableFilesCount" value="39" />
     <option name="fileBasedEmbeddingIndicesEnabled" value="true" />
   </component>
   <component name="Git.Settings">
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
   </component>
-  <component name="HighlightingSettingsPerFile">
-    <setting file="file://$PROJECT_DIR$/Assets/Scripts/Attributes/Health.cs" root0="FORCE_HIGHLIGHTING" />
-    <setting file="file://$PROJECT_DIR$/Assets/Scripts/Interactables/BaseInteractable.cs" root0="FORCE_HIGHLIGHTING" />
-    <setting file="file://$PROJECT_DIR$/Assets/Scripts/Interactables/HealthInteractable.cs" root0="FORCE_HIGHLIGHTING" />
-    <setting file="file://$PROJECT_DIR$/Assets/Scripts/UI/LobbyController.cs" root0="FORCE_HIGHLIGHTING" />
-    <setting file="file://$PROJECT_DIR$/Assets/Third Parties/Photon/Fusion/Editor/Fusion.Unity.Editor.cs" root0="SKIP_HIGHLIGHTING" />
-    <setting file="file://$PROJECT_DIR$/Assets/UI/MainPanelSettings.asset" root0="FORCE_HIGHLIGHTING" />
-    <setting file="file://$PROJECT_DIR$/Library/PackageCache/com.unity.ugui@bb329a87fcdc/Runtime/TMP/TMP_PackageResourceImporter.cs" root0="SKIP_HIGHLIGHTING" />
-  </component>
   <component name="McpProjectServerCommands">
     <commands />
     <urls />
@@ -140,7 +131,8 @@
       <workItem from="1777150520438" duration="58000" />
       <workItem from="1777150592854" duration="4699000" />
       <workItem from="1777181837663" duration="1519000" />
-      <workItem from="1777269364664" duration="33315000" />
+      <workItem from="1777269364664" duration="40284000" />
+      <workItem from="1777373072815" duration="1852000" />
     </task>
     <servers />
   </component>
diff --git a/Assets/Scripts/UI/BaseUIController.cs b/Assets/Scripts/UI/BaseUIController.cs
index e375fa01..14ab964f 100644
--- a/Assets/Scripts/UI/BaseUIController.cs
+++ b/Assets/Scripts/UI/BaseUIController.cs
@@ -10,6 +10,8 @@ namespace Hallucinate.UI
         protected VisualElement root;
         protected UIManager uiManager;
 
+        public VisualElement Root => root; // Thêm thuộc tính này
+
         public virtual void Initialize(VisualElement uxmlRoot, UIManager manager)
         {
             root = uxmlRoot;
diff --git a/Assets/Scripts/UI/FirebaseService.cs b/Assets/Scripts/UI/FirebaseService.cs
new file mode 100644
index 00000000..2a3264a1
--- /dev/null
+++ b/Assets/Scripts/UI/FirebaseService.cs
@@ -0,0 +1,43 @@
+using System;
+using System.Collections;
+using System.Threading.Tasks;
+using UnityEngine;
+using UnityEngine.Networking;
+
+namespace Hallucinate.UI
+{
+    public static class FirebaseService
+    {
+        // Thay link database của bạn vào đây
+        private const string BASE_URL = "https://YOUR_FIREBASE_URL.firebaseio.com/users";
+
+        public static async Task<bool> IsUsernameTaken(string username)
+        {
+            string url = $"{BASE_URL}/{username}.json";
+            using (UnityWebRequest request = UnityWebRequest.Get(url))
+            {
+                var operation = request.SendWebRequest();
+                while (!operation.isDone) await Task.Yield();
+
+                if (request.result != UnityWebRequest.Result.Success) return false;
+                
+                // Nếu kết quả trả về không phải "null" nghĩa là user đã tồn tại
+                return request.downloadHandler.text != "null";
+            }
+        }
+
+        public static async Task<bool> RegisterUser(string username)
+        {
+            string url = $"{BASE_URL}/{username}.json";
+            string jsonData = "{\"created_at\": \"" + DateTime.Now.ToString() + "\"}";
+
+            using (UnityWebRequest request = UnityWebRequest.Put(url, jsonData))
+            {
+                var operation = request.SendWebRequest();
+                while (!operation.isDone) await Task.Yield();
+
+                return request.result == UnityWebRequest.Result.Success;
+            }
+        }
+    }
+}
diff --git a/Assets/Scripts/UI/FirebaseService.cs.meta b/Assets/Scripts/UI/FirebaseService.cs.meta
new file mode 100644
index 00000000..0eceeca4
--- /dev/null
+++ b/Assets/Scripts/UI/FirebaseService.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: bf13e7d21e483574882c6b687a6ae19c
\ No newline at end of file
diff --git a/Assets/Scripts/UI/LoginController.cs b/Assets/Scripts/UI/LoginController.cs
new file mode 100644
index 00000000..1a2c8f82
--- /dev/null
+++ b/Assets/Scripts/UI/LoginController.cs
@@ -0,0 +1,90 @@
+using UnityEngine;
+using UnityEngine.UIElements;
+using System.Threading.Tasks;
+
+namespace Hallucinate.UI
+{
+    public class LoginController : BaseUIController
+    {
+        private TextField _nameInput;
+        private Label _errorLabel;
+        private Button _confirmBtn;
+
+        public override void Initialize(VisualElement uxmlRoot, UIManager manager)
+        {
+            base.Initialize(uxmlRoot, manager);
+
+            _nameInput = root.Q<TextField>("UsernameInput");
+            _errorLabel = root.Q<Label>("ErrorMsg");
+            _confirmBtn = root.Q<Button>("ConfirmBtn");
+
+            if (_confirmBtn != null)
+                _confirmBtn.clicked += OnConfirmClicked;
+        }
+
+        private async void OnConfirmClicked()
+        {
+            string username = _nameInput.value.Trim();
+
+            if (string.IsNullOrEmpty(username))
+            {
+                ShowError("Name cannot be empty!");
+                return;
+            }
+
+            _confirmBtn.SetEnabled(false);
+            _confirmBtn.text = "CHECKING...";
+
+            // 1. Kiểm tra trùng tên trên Firebase
+            bool isTaken = await FirebaseService.IsUsernameTaken(username);
+
+            if (isTaken)
+            {
+                ShowError("This name is already taken!");
+                _confirmBtn.SetEnabled(true);
+                _confirmBtn.text = "CONFIRM";
+            }
+            else
+            {
+                // 2. Đăng ký user mới
+                bool success = await FirebaseService.RegisterUser(username);
+                if (success)
+                {
+                    // 3. Lưu lại và đóng popup
+                    PlayerPrefs.SetString("Username", username);
+                    PlayerPrefs.Save();
+                    Debug.Log($"[Login] Registered as {username}");
+                    
+                    // Thông báo cho UIManager biết đã login xong
+                    uiManager.OnLoginSuccess();
+                    await PlayTransitionOut();
+                }
+                else
+                {
+                    ShowError("Connection error!");
+                    _confirmBtn.SetEnabled(true);
+                    _confirmBtn.text = "CONFIRM";
+                }
+            }
+        }
+
+        private void ShowError(string msg)
+        {
+            if (_errorLabel == null) return;
+            _errorLabel.text = msg;
+            _errorLabel.style.display = DisplayStyle.Flex;
+        }
+
+        public override async Task PlayTransitionIn()
+        {
+            // Login hiện ra như một overlay trung tâm
+            if (root != null)
+            {
+                root.style.translate = new StyleTranslate(new Translate(0, 0));
+                root.style.opacity = 0;
+            }
+            Show();
+            await PrimeTween.Tween.Custom(0f, 1f, duration: 0.5f, onValueChange: val => root.style.opacity = val);
+        }
+    }
+}
diff --git a/Assets/Scripts/UI/LoginController.cs.meta b/Assets/Scripts/UI/LoginController.cs.meta
new file mode 100644
index 00000000..a4e39dce
--- /dev/null
+++ b/Assets/Scripts/UI/LoginController.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: fbd606c21d317da47820446e4da1c55b
\ No newline at end of file
diff --git a/Assets/Scripts/UI/SettingsController.cs b/Assets/Scripts/UI/SettingsController.cs
index 1368e661..be5239bd 100644
--- a/Assets/Scripts/UI/SettingsController.cs
+++ b/Assets/Scripts/UI/SettingsController.cs
@@ -19,10 +19,12 @@ namespace Hallucinate.UI
             _tabTitle = root.Q<Label>("TabTitle");
             _content = root.Q<ScrollView>("SettingsContent");
 
-            // Logic đóng khi nhấn vào vùng nền bên ngoài sidebar
-            root.RegisterCallback<ClickEvent>(evt => {
+            // Đăng ký sự kiện Click vào vùng nền tối
+            root.RegisterCallback<PointerDownEvent>(evt => {
+                // Nếu click trực tiếp vào SettingsRoot (không phải sidebar)
                 if (evt.target == root)
                 {
+                    Debug.Log("[Settings] Clicked outside sidebar, closing...");
                     uiManager.ToggleSettings();
                 }
             });
@@ -43,14 +45,13 @@ namespace Hallucinate.UI
 
         public override async Task PlayTransitionIn()
         {
-            // Reset vị trí root về 0 (Overlay trên màn hình hiện tại)
             if (root != null)
             {
                 root.style.translate = new StyleTranslate(new Translate(0, 0));
                 root.style.display = DisplayStyle.Flex;
             }
 
-            // Trượt sidebar từ trái vào
+            // Hiệu ứng trượt sidebar
             _sidebar.style.translate = new StyleTranslate(new Translate(Length.Percent(-100), 0));
             await Tween.Custom(-100f, 0f, duration: 0.4f, ease: Ease.OutQuad, 
                 onValueChange: val => _sidebar.style.translate = new StyleTranslate(new Translate(Length.Percent(val), 0)));
@@ -58,7 +59,6 @@ namespace Hallucinate.UI
 
         public override async Task PlayTransitionOut()
         {
-            // Trượt sidebar ra trái
             await Tween.Custom(0f, -100f, duration: 0.4f, ease: Ease.InQuad, 
                 onValueChange: val => _sidebar.style.translate = new StyleTranslate(new Translate(Length.Percent(val), 0)));
             
diff --git a/Assets/Scripts/UI/UIManager.cs b/Assets/Scripts/UI/UIManager.cs
index 9d3c8bf6..97b7fd1b 100644
--- a/Assets/Scripts/UI/UIManager.cs
+++ b/Assets/Scripts/UI/UIManager.cs
@@ -4,7 +4,7 @@ using System.Threading.Tasks;
 using UnityEngine;
 using UnityEngine.UIElements;
 using PrimeTween;
-using OnlyScove.Scripts; // Namespace của InputReader
+using OnlyScove.Scripts;
 #if UNITY_EDITOR
 using UnityEditor;
 #endif
@@ -40,12 +40,14 @@ namespace Hallucinate.UI
         [SerializeField] private Color rippleColor = new Color(1, 1, 1, 0.4f);
 
         [Header("UI Templates")]
+        [SerializeField] private VisualTreeAsset loginTemplate; // Template mới
         [SerializeField] private VisualTreeAsset mainMenuTemplate;
         [SerializeField] private VisualTreeAsset lobbyTemplate;
         [SerializeField] private VisualTreeAsset profileTemplate;
         [SerializeField] private VisualTreeAsset settingsTemplate;
         [SerializeField] private VisualTreeAsset hudTemplate;
         
+        private LoginController _loginController;
         private MainMenuController _mainMenuController;
         private SettingsController _settingsController;
         private List<VisualElement> _trailSegments = new List<VisualElement>();
@@ -79,7 +81,6 @@ namespace Hallucinate.UI
 
             _rootElement.RegisterCallback<PointerDownEvent>(OnGlobalClick, TrickleDown.TrickleDown);
 
-            // Đăng ký sự kiện từ InputReader (Chuẩn New Input System)
             if (inputReader != null)
             {
                 inputReader.OnToggleSettingsEvent += ToggleSettings;
@@ -94,6 +95,29 @@ namespace Hallucinate.UI
             }
 #endif
             InitializeControllers();
+
+            // KIỂM TRA LOGIN
+            CheckLoginStatus();
+        }
+
+        private void CheckLoginStatus()
+        {
+            string savedName = PlayerPrefs.GetString("Username", "");
+            if (string.IsNullOrEmpty(savedName))
+            {
+                _ = Push<LoginController>();
+            }
+            else
+            {
+                Debug.Log($"[UIManager] Welcome back, {savedName}!");
+                _ = Push<MainMenuController>();
+            }
+        }
+
+        public void OnLoginSuccess()
+        {
+            // Sau khi login xong thì hiện MainMenu
+            _ = Push<MainMenuController>();
         }
 
         private void OnDestroy()
@@ -117,6 +141,7 @@ namespace Hallucinate.UI
             if (!_isSettingsOpen)
             {
                 _isSettingsOpen = true;
+                _settingsController.Root.BringToFront();
                 _cursorLayer.BringToFront();
                 await _settingsController.PlayTransitionIn();
             }
@@ -261,6 +286,7 @@ namespace Hallucinate.UI
 
         private void InitializeControllers()
         {
+            _loginController = RegisterController<LoginController>(loginTemplate);
             _mainMenuController = RegisterController<MainMenuController>(mainMenuTemplate);
             if (_mainMenuController != null && gameIcon != null) _mainMenuController.SetGameIcon(gameIcon);
 
@@ -268,8 +294,6 @@ namespace Hallucinate.UI
             RegisterController<ProfileController>(profileTemplate);
             _settingsController = RegisterController<SettingsController>(settingsTemplate);
             RegisterController<HUDController>(hudTemplate);
-
-            _ = Push<MainMenuController>();
         }
 
         private T RegisterController<T>(VisualTreeAsset template) where T : BaseUIController, new()
diff --git a/Assets/Settings/Project Setting/FolderIcons.asset b/Assets/Settings/Project Setting/FolderIcons.asset
index abe6907d..15aca284 100644
--- a/Assets/Settings/Project Setting/FolderIcons.asset	
+++ b/Assets/Settings/Project Setting/FolderIcons.asset	
@@ -60,7 +60,7 @@ MonoBehaviour:
   - folder: {fileID: 102900000, guid: 8c41df02b38b2ee40b792b146c0493f2, type: 3}
     folderIcon: {fileID: 2800000, guid: 9687b8a9002844d4b8ece997ce390043, type: 3}
     overlayIcon: {fileID: 0}
-  - folder: {fileID: 102900000, guid: 4e6e9b4a0c2e35242b749c3b025c2b6d, type: 3}
+  - folder: {fileID: 102900000, guid: 55d9223ee943a5248a49f0c45b440900, type: 3}
     folderIcon: {fileID: 2800000, guid: f98ab23e70af0464ba10b820ef66cf70, type: 3}
     overlayIcon: {fileID: 0}
   - folder: {fileID: 102900000, guid: e4342b7ac2b8c524bbfd5ed650d13a32, type: 3}
diff --git a/Assets/Third Parties.meta b/Assets/Third Parties.meta
index 06954b1a..0f6e8ad7 100644
--- a/Assets/Third Parties.meta	
+++ b/Assets/Third Parties.meta	
@@ -1,5 +1,5 @@
 fileFormatVersion: 2
-guid: 4e6e9b4a0c2e35242b749c3b025c2b6d
+guid: 55d9223ee943a5248a49f0c45b440900
 folderAsset: yes
 DefaultImporter:
   externalObjects: {}
diff --git a/Assets/Third Parties.png b/Assets/Third Parties.png
deleted file mode 100644
index d405c09c..00000000
Binary files a/Assets/Third Parties.png and /dev/null differ
diff --git a/Assets/Third Parties.png.meta b/Assets/Third Parties.png.meta
deleted file mode 100644
index 25bcf8cb..00000000
--- a/Assets/Third Parties.png.meta	
+++ /dev/null
@@ -1,130 +0,0 @@
-fileFormatVersion: 2
-guid: d6e88709eb6360c4187aedc8a351b609
-TextureImporter:
-  internalIDToNameTable: []
-  externalObjects: {}
-  serializedVersion: 13
-  mipmaps:
-    mipMapMode: 0
-    enableMipMap: 0
-    sRGBTexture: 1
-    linearTexture: 0
-    fadeOut: 0
-    borderMipMap: 0
-    mipMapsPreserveCoverage: 0
-    alphaTestReferenceValue: 0.5
-    mipMapFadeDistanceStart: 1
-    mipMapFadeDistanceEnd: 3
-  bumpmap:
-    convertToNormalMap: 0
-    externalNormalMap: 0
-    heightScale: 0.25
-    normalMapFilter: 0
-    flipGreenChannel: 0
-  isReadable: 0
-  streamingMipmaps: 0
-  streamingMipmapsPriority: 0
-  vTOnly: 0
-  ignoreMipmapLimit: 0
-  grayScaleToAlpha: 0
-  generateCubemap: 6
-  cubemapConvolution: 0
-  seamlessCubemap: 0
-  textureFormat: 1
-  maxTextureSize: 2048
-  textureSettings:
-    serializedVersion: 2
-    filterMode: 1
-    aniso: 1
-    mipBias: 0
-    wrapU: 1
-    wrapV: 1
-    wrapW: 0
-  nPOTScale: 0
-  lightmap: 0
-  compressionQuality: 50
-  spriteMode: 1
-  spriteExtrude: 1
-  spriteMeshType: 1
-  alignment: 0
-  spritePivot: {x: 0.5, y: 0.5}
-  spritePixelsToUnits: 100
-  spriteBorder: {x: 0, y: 0, z: 0, w: 0}
-  spriteGenerateFallbackPhysicsShape: 1
-  alphaUsage: 1
-  alphaIsTransparency: 1
-  spriteTessellationDetail: -1
-  textureType: 8
-  textureShape: 1
-  singleChannelComponent: 0
-  flipbookRows: 1
-  flipbookColumns: 1
-  maxTextureSizeSet: 0
-  compressionQualitySet: 0
-  textureFormatSet: 0
-  ignorePngGamma: 0
-  applyGammaDecoding: 0
-  swizzle: 50462976
-  cookieLightType: 0
-  platformSettings:
-  - serializedVersion: 4
-    buildTarget: DefaultTexturePlatform
-    maxTextureSize: 16384
-    resizeAlgorithm: 0
-    textureFormat: -1
-    textureCompression: 2
-    compressionQuality: 50
-    crunchedCompression: 0
-    allowsAlphaSplitting: 0
-    overridden: 0
-    ignorePlatformSupport: 0
-    androidETC2FallbackOverride: 0
-    forceMaximumCompressionQuality_BC6H_BC7: 0
-  - serializedVersion: 4
-    buildTarget: Standalone
-    maxTextureSize: 2048
-    resizeAlgorithm: 0
-    textureFormat: -1
-    textureCompression: 1
-    compressionQuality: 50
-    crunchedCompression: 0
-    allowsAlphaSplitting: 0
-    overridden: 0
-    ignorePlatformSupport: 0
-    androidETC2FallbackOverride: 0
-    forceMaximumCompressionQuality_BC6H_BC7: 0
-  - serializedVersion: 4
-    buildTarget: Android
-    maxTextureSize: 2048
-    resizeAlgorithm: 0
-    textureFormat: -1
-    textureCompression: 1
-    compressionQuality: 50
-    crunchedCompression: 0
-    allowsAlphaSplitting: 0
-    overridden: 0
-    ignorePlatformSupport: 0
-    androidETC2FallbackOverride: 0
-    forceMaximumCompressionQuality_BC6H_BC7: 0
-  spriteSheet:
-    serializedVersion: 2
-    sprites: []
-    outline: []
-    customData: 
-    physicsShape: []
-    bones: []
-    spriteID: 5e97eb03825dee720800000000000000
-    internalID: 0
-    vertices: []
-    indices: 
-    edges: []
-    weights: []
-    secondaryTextures: []
-    spriteCustomMetadata:
-      entries: []
-    nameFileIdTable: {}
-  mipmapLimitGroupName: 
-  pSDRemoveMatte: 0
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 
diff --git a/Assets/UI/Global.uss b/Assets/UI/Global.uss
index 5c10322a..2c164a88 100644
--- a/Assets/UI/Global.uss
+++ b/Assets/UI/Global.uss
@@ -1,12 +1,51 @@
 /* Global Styles for Hallucinate UI */
+/* osu!lazer-inspired — extends existing rules, nothing removed */
 
+/* ============================================================
+   DESIGN TOKENS
+   ============================================================ */
 :root {
+    /* --- Giữ nguyên biến cũ --- */
     --primary-color: #ffffff;
     --accent-color: #00ffcc;
     --background-blur: rgba(0, 0, 0, 0.5);
-    --font-main: resource("Fonts/Ancient Medium SDF"); /* Place holder font */
+    --font-main: resource("Fonts/Ancient Medium SDF");
+
+    /* --- Spacing system (base 4px) --- */
+    --space-1: 4px;
+    --space-2: 8px;
+    --space-3: 12px;
+    --space-4: 16px;
+    --space-6: 24px;
+    --space-8: 32px;
+
+    /* --- Color system --- */
+    --color-surface:        rgba(0, 0, 0, 0.65);
+    --color-surface-light:  rgba(255, 255, 255, 0.06);
+    --color-border:         rgba(255, 255, 255, 0.12);
+    --color-border-hover:   rgba(255, 255, 255, 0.28);
+
+    /* Palette — mỗi nút 1 màu (giống osu) */
+    --color-btn-settings:   #7B6EE8;   /* tím */
+    --color-btn-join:       #4DC8A0;   /* teal */
+    --color-btn-create:     #E8834D;   /* cam */
+    --color-btn-profile:    #E84D8A;   /* hồng */
+    --color-btn-exit:       #888888;   /* xám trung tính */
+
+    /* Text */
+    --color-text-primary:   rgba(255, 255, 255, 0.95);
+    --color-text-secondary: rgba(255, 255, 255, 0.55);
+
+    /* --- Border radius --- */
+    --radius-sm:  6px;
+    --radius-md:  10px;
+    --radius-lg:  16px;
+    --radius-pill: 999px;
 }
 
+/* ============================================================
+   BASE RESET
+   ============================================================ */
 .screen-root {
     width: 100%;
     height: 100%;
@@ -14,24 +53,277 @@
     background-color: transparent;
 }
 
+/* ============================================================
+   BUTTON — SPRING (giữ nguyên, chỉ thêm visual)
+   ============================================================ */
 .button-spring {
+    /* --- Giữ nguyên animation cũ --- */
     transition-duration: 0.1s;
     transition-timing-function: ease-out-back;
+
+    /* --- Thêm visual --- */
+    height: 48px;
+    padding-left: var(--space-4);
+    padding-right: var(--space-4);
+    border-radius: var(--radius-md);
+    border-width: 0;
+    -unity-font-definition: resource("Fonts/Ancient Medium SDF");
+    font-size: 15px;
+    color: var(--color-text-primary);
+    -unity-font-style: bold;
+    cursor: link;
+
+    /* Màu mặc định — bị override bởi modifier class bên dưới */
+    background-color: rgba(255, 255, 255, 0.1);
 }
 
 .button-spring:hover {
     scale: 1.05;
+    background-color: rgba(255, 255, 255, 0.18);
 }
 
 .button-spring:active {
     scale: 0.9;
 }
 
+/* Per-button accent colors (gán thêm class vào UXML) */
+.btn-settings { background-color: var(--color-btn-settings); }
+.btn-settings:hover { background-color: #9080F0; }
+
+.btn-join     { background-color: var(--color-btn-join); }
+.btn-join:hover { background-color: #60DEB8; }
+
+.btn-create   { background-color: var(--color-btn-create); }
+.btn-create:hover { background-color: #F09A68; }
+
+.btn-profile  { background-color: var(--color-btn-profile); }
+.btn-profile:hover { background-color: #F060A0; }
+
+.btn-exit     { background-color: var(--color-btn-exit); }
+.btn-exit:hover { background-color: #AAAAAA; }
+
+/* ============================================================
+   RIBBON — dải băng main menu
+   ============================================================ */
+.ribbon {
+    flex-direction: row;
+    align-items: center;
+    justify-content: center;
+    background-color: var(--color-surface);
+    padding-top: var(--space-2);
+    padding-bottom: var(--space-2);
+    padding-left: var(--space-6);
+    padding-right: var(--space-6);
+    border-radius: var(--radius-lg);
+    border-width: 1px;
+    border-color: var(--color-border);
+
+    /* gap giữa các button */
+    /* Unity UIToolkit không có gap trực tiếp, dùng margin trên button */
+}
+
+/* Spacing giữa các nút trong ribbon */
+.ribbon .button-spring {
+    margin-left: var(--space-2);
+    margin-right: var(--space-2);
+    min-width: 96px;
+}
+
+/* ============================================================
+   LOGO
+   ============================================================ */
 .logo-pulse {
-    /* Pulse effect will be handled via PrimeTween in Controller, 
-       but we can define base styles here */
     width: 200px;
     height: 200px;
     align-self: center;
     justify-content: center;
+
+    /* Thêm visual */
+    border-radius: var(--radius-pill);
+    border-width: 2px;
+    border-color: var(--color-border-hover);
+    background-color: rgba(255, 255, 255, 0.08);
+    overflow: hidden;
+}
+
+/* ============================================================
+   SURFACE / PANEL — dùng cho Lobby, Profile, Settings
+   ============================================================ */
+.panel-glass {
+    background-color: var(--color-surface);
+    border-radius: var(--radius-lg);
+    border-width: 1px;
+    border-color: var(--color-border);
+    padding: var(--space-6);
+}
+
+.panel-glass--right {
+    /* Right pane trong Lobby / Profile */
+    width: 40%;
+    height: 100%;
+    border-radius: 0;
+    border-top-left-radius: var(--radius-lg);
+    border-bottom-left-radius: var(--radius-lg);
+}
+
+/* ============================================================
+   TYPOGRAPHY
+   ============================================================ */
+.text-heading {
+    font-size: 28px;
+    -unity-font-style: bold;
+    color: var(--color-text-primary);
+    -unity-font-definition: resource("Fonts/Ancient Medium SDF");
+}
+
+.text-label {
+    font-size: 13px;
+    color: var(--color-text-secondary);
+    -unity-font-definition: resource("Fonts/Ancient Medium SDF");
+}
+
+.text-body {
+    font-size: 15px;
+    color: var(--color-text-primary);
+    -unity-font-definition: resource("Fonts/Ancient Medium SDF");
+}
+
+/* ============================================================
+   INPUT FIELD
+   ============================================================ */
+.input-field {
+    height: 44px;
+    border-radius: var(--radius-md);
+    border-width: 1px;
+    border-color: var(--color-border);
+    background-color: var(--color-surface-light);
+    color: var(--color-text-primary);
+    font-size: 14px;
+    padding-left: var(--space-3);
+    padding-right: var(--space-3);
+}
+
+.input-field:focus {
+    border-color: var(--color-border-hover);
+    background-color: rgba(255, 255, 255, 0.1);
+}
+
+/* ============================================================
+   SIDEBAR (Settings)
+   ============================================================ */
+.sidebar-tab {
+    height: 48px;
+    padding-left: var(--space-4);
+    border-radius: var(--radius-sm);
+    background-color: transparent;
+    border-width: 0;
+    color: var(--color-text-secondary);
+    font-size: 14px;
+    -unity-text-align: middle-left;
+    margin-bottom: var(--space-1);
+    transition-duration: 0.1s;
+}
+
+.sidebar-tab:hover {
+    background-color: var(--color-surface-light);
+    color: var(--color-text-primary);
+}
+
+.sidebar-tab.active-tab {
+    background-color: rgba(123, 110, 232, 0.2);
+    color: var(--color-text-primary);
+    border-left-color: var(--color-btn-settings);
+    border-left-width: 3px;
+    border-radius: 0;
+    border-top-right-radius: var(--radius-sm);
+    border-bottom-right-radius: var(--radius-sm);
+}
+
+/* ============================================================
+   HUD
+   ============================================================ */
+.hud-root {
+    width: 100%;
+    height: 100%;
+    position: absolute;
+    picking-mode: ignore;
+}
+
+.hud-bar {
+    border-radius: var(--radius-pill);
+    border-width: 1px;
+    border-color: var(--color-border);
+    background-color: rgba(0, 0, 0, 0.4);
+    overflow: hidden;
+}
+
+.hud-slot {
+    width: 56px;
+    height: 56px;
+    border-radius: var(--radius-md);
+    border-width: 1px;
+    border-color: var(--color-border);
+    background-color: var(--color-surface);
+    overflow: hidden;
+}
+
+.hud-slot--active {
+    width: 72px;
+    height: 72px;
+    border-color: var(--color-border-hover);
+    border-width: 2px;
+}
+
+.hud-text-debug {
+    font-size: 12px;
+    color: var(--color-text-secondary);
+    -unity-font-definition: resource("Fonts/Ancient Medium SDF");
+}
+
+/* ============================================================
+   READY BUTTON (Lounge)
+   ============================================================ */
+.btn-ready {
+    height: 56px;
+    min-width: 160px;
+    border-radius: var(--radius-md);
+    border-width: 2px;
+    border-color: var(--color-btn-join);
+    background-color: transparent;
+    color: var(--color-btn-join);
+    font-size: 16px;
+    -unity-font-style: bold;
+    transition-duration: 0.15s;
+}
+
+.btn-ready.is-ready {
+    background-color: var(--color-btn-join);
+    color: rgba(0, 0, 0, 0.85);
+}
+
+/* ============================================================
+   SCROLL VIEW
+   ============================================================ */
+.scroll-list {
+    background-color: transparent;
+    border-width: 0;
+}
+
+.room-item {
+    height: 56px;
+    margin-bottom: var(--space-2);
+    border-radius: var(--radius-md);
+    background-color: var(--color-surface-light);
+    border-width: 1px;
+    border-color: var(--color-border);
+    padding-left: var(--space-4);
+    padding-right: var(--space-4);
+    flex-direction: row;
+    align-items: center;
+    transition-duration: 0.1s;
+}
+
+.room-item:hover {
+    background-color: rgba(255, 255, 255, 0.1);
+    border-color: var(--color-border-hover);
 }
diff --git a/Assets/UI/LoginPopup.uxml b/Assets/UI/LoginPopup.uxml
new file mode 100644
index 00000000..e91159e0
--- /dev/null
+++ b/Assets/UI/LoginPopup.uxml
@@ -0,0 +1,14 @@
+<ui:UXML xmlns:ui="UnityEngine.UIElements" xmlns:uie="UnityEditor.UIElements" editor-extension-mode="False">
+    <Style src="project:/Assets/UI/Global.uss" />
+    <ui:VisualElement name="LoginRoot" class="screen-root" style="background-color: rgba(0, 0, 0, 0.85); justify-content: center; align-items: center;">
+        <ui:VisualElement name="Window" style="width: 400px; padding: 30px; background-color: #1a1a1a; border-radius: 15px; border-width: 2px; border-color: #333;">
+            <ui:Label text="WELCOME TRAVELLER" style="font-size: 24px; -unity-font-style: bold; color: white; align-self: center; margin-bottom: 10px;" />
+            <ui:Label text="Enter your username to begin" style="font-size: 14px; color: #888; align-self: center; margin-bottom: 25px;" />
+            
+            <ui:TextField name="UsernameInput" placeholder-text="Your name..." style="margin-bottom: 10px;" />
+            <ui:Label name="ErrorMsg" text="Name is already taken!" style="color: #ff4444; font-size: 12px; display: none; margin-bottom: 10px;" />
+            
+            <ui:Button name="ConfirmBtn" text="CONFIRM" class="button-spring" style="height: 45px; background-color: #00ffcc; color: black; -unity-font-style: bold; margin-top: 10px;" />
+        </ui:VisualElement>
+    </ui:VisualElement>
+</ui:UXML>
diff --git a/Assets/UI/LoginPopup.uxml.meta b/Assets/UI/LoginPopup.uxml.meta
new file mode 100644
index 00000000..74d7d11e
--- /dev/null
+++ b/Assets/UI/LoginPopup.uxml.meta
@@ -0,0 +1,10 @@
+fileFormatVersion: 2
+guid: 4f11f2cb91fbd4748bcbc70cd0f5afe7
+ScriptedImporter:
+  internalIDToNameTable: []
+  externalObjects: {}
+  serializedVersion: 2
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
+  script: {fileID: 13804, guid: 0000000000000000e000000000000000, type: 0}