feat: SongSelect UI polish — marquee title, button states, font

- MarqueeText: scrolling title for long song names (RectMask2D clipped)
- SongDetailPanel: difficulty selected = green (img.color direct set)
- SongSelectManager: ALL/OWNED tab active state via img.color
- Card layout: DestroyImmediate + correct rebuild order to fix zero-size title bug
- NanumGothic SDF fallback configured on LiberationSans for Korean support

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Assets/Script/MarqueeText.cs

@@ -0,0 +1,55 @@
+using System.Collections;
+using TMPro;
+using UnityEngine;
+
+[RequireComponent(typeof(TMP_Text))]
+public class MarqueeText : MonoBehaviour
+{
+    public float speed      = 35f;
+    public float pauseStart = 1.5f;
+    public float pauseEnd   = 0.6f;
+
+    private TMP_Text      _label;
+    private RectTransform _rect;
+
+    private void Awake()
+    {
+        _label = GetComponent<TMP_Text>();
+        _rect  = GetComponent<RectTransform>();
+    }
+
+    private IEnumerator Start()
+    {
+        yield return null; // layout 완료 후 실행
+
+        _label.ForceMeshUpdate();
+        float textW      = _label.preferredWidth;
+        float containerW = ((RectTransform)transform.parent).rect.width;
+        float dist       = textW - containerW;
+
+        if (dist > 1f)
+            StartCoroutine(ScrollLoop(dist));
+    }
+
+    private IEnumerator ScrollLoop(float dist)
+    {
+        while (true)
+        {
+            SetX(0f);
+            yield return new WaitForSeconds(pauseStart);
+
+            float x = 0f;
+            while (x > -dist)
+            {
+                x = Mathf.MoveTowards(x, -dist, speed * Time.deltaTime);
+                SetX(x);
+                yield return null;
+            }
+
+            yield return new WaitForSeconds(pauseEnd);
+        }
+    }
+
+    private void SetX(float x) =>
+        _rect.anchoredPosition = new Vector2(x, _rect.anchoredPosition.y);
+}

Assets/Script/MarqueeText.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: aec41476b82385047a8cec63612a6698

Assets/Script/SongDetailPanel.cs

@@ -34,7 +34,7 @@ public class SongDetailPanel : MonoBehaviour
     [SerializeField] private string gameSceneName = "Game";
 
     private static readonly Color SelectedColor     = new Color(0.2f, 0.78f, 0.4f);
-    private static readonly Color DeselectedColor = Color.white;
+    private static readonly Color DeselectedImgColor = new Color(1f, 1f, 1f, 0.12f); // original button alpha
 
     private SongInfo          currentSong;
     private string            selectedDifficulty;
@@ -123,9 +123,16 @@ public class SongDetailPanel : MonoBehaviour
         foreach (var (key, getBtn) in diffSlots)
         {
             Button btn      = getBtn(this);
-            var    colors = btn.colors;
+            bool   selected = key == selectedDifficulty;
-            colors.normalColor = (key == selectedDifficulty) ? SelectedColor : DeselectedColor;
+
-            btn.colors = colors;
+            if (btn.targetGraphic is Image img)
+                img.color = selected ? SelectedColor : DeselectedImgColor;
+
+            var cb = btn.colors;
+            cb.normalColor      = Color.white;
+            cb.highlightedColor = selected ? new Color(0.3f, 0.95f, 0.55f) : new Color(1f, 1f, 1f, 0.25f);
+            cb.pressedColor     = selected ? new Color(0.15f, 0.6f, 0.3f)  : new Color(1f, 1f, 1f, 0.35f);
+            btn.colors          = cb;
         }
     }
 

Assets/Script/SongSelectManager.cs

@@ -14,19 +14,25 @@ public class SongSelectManager : MonoBehaviour
     [SerializeField] private GameObject      loadingOverlay;
     [SerializeField] private GameObject      errorOverlay;
     [SerializeField] private TMP_Text        errorText;
-    [SerializeField] private TMP_FontAsset   cardFont;
 
-    private static readonly Color TabActive   = Color.white;
+
-    private static readonly Color TabInactive = new Color(0.6f, 0.6f, 0.6f);
+    private static readonly Color TabActive   = new Color(1f, 1f, 1f, 0.45f);
+    private static readonly Color TabInactive = new Color(1f, 1f, 1f, 0.12f);
 
     private static string CachePath =>
         Path.Combine(Application.persistentDataPath, "songs_cache.json");
 
     private List<SongInfo>  allSongs     = new List<SongInfo>();
     private bool            showingOwned = false;
+    private TMP_FontAsset   _cardFont;
 
     private void Start()
     {
+        // NanumGothic SDF를 직접 로드 — Resources 경로에 있어야 함
+        _cardFont = Resources.Load<TMP_FontAsset>("Fonts & Materials/NanumGothic SDF");
+        if (_cardFont == null)
+            _cardFont = Resources.Load<TMP_FontAsset>("Fonts & Materials/LiberationSans SDF");
+
         tabAllBtn  .onClick.AddListener(() => SwitchTab(false));
         tabOwnedBtn.onClick.AddListener(() => SwitchTab(true));
         detailPanel.gameObject.SetActive(false);
@@ -49,8 +55,10 @@ public class SongSelectManager : MonoBehaviour
 
     private static void ApplyTabColor(Button btn, Color c)
     {
+        if (btn.targetGraphic is Image img)
+            img.color = c;
         var colors = btn.colors;
-        colors.normalColor = c;
+        colors.normalColor = Color.white;
         btn.colors = colors;
     }
 
@@ -87,8 +95,9 @@ public class SongSelectManager : MonoBehaviour
 
     public void RefreshCards()
     {
+        // DestroyImmediate to avoid deferred-destroy interfering with layout
         for (int i = cardContainer.childCount - 1; i >= 0; i--)
-            Destroy(cardContainer.GetChild(i).gameObject);
+            DestroyImmediate(cardContainer.GetChild(i).gameObject);
 
         List<SongInfo> songs = showingOwned
             ? allSongs.FindAll(s => SongLibrary.Instance.IsSongDownloaded(s.id))
@@ -96,6 +105,10 @@ public class SongSelectManager : MonoBehaviour
 
         foreach (SongInfo song in songs)
             SpawnCard(song);
+
+        // Order matters: layout first → card gets size → then canvas update → anchored children recalculate
+        LayoutRebuilder.ForceRebuildLayoutImmediate(cardContainer);
+        Canvas.ForceUpdateCanvases();
     }
 
     private void SpawnCard(SongInfo song)
@@ -121,21 +134,33 @@ public class SongSelectManager : MonoBehaviour
         bc.fadeDuration     = 0.1f;
         btn.colors = bc;
 
-        // Title
+        // Title — RectMask2D 컨테이너 안에서 마퀴 스크롤
+        var titleMask = new GameObject("TitleMask");
+        titleMask.transform.SetParent(card.transform, false);
+        var tmr = titleMask.AddComponent<RectTransform>();
+        tmr.anchorMin = new Vector2(0f, 0.5f);
+        tmr.anchorMax = new Vector2(1f, 1f);
+        tmr.offsetMin = new Vector2(5f, 0f);
+        tmr.offsetMax = new Vector2(downloaded ? -20f : -3f, 0f);
+        titleMask.AddComponent<RectMask2D>();
+
         var titleGO = new GameObject("Title");
-        titleGO.transform.SetParent(card.transform, false);
+        titleGO.transform.SetParent(titleMask.transform, false);
         var tr = titleGO.AddComponent<RectTransform>();
-        tr.anchorMin = new Vector2(0f, 0.5f);
+        tr.anchorMin        = new Vector2(0f, 0f);
-        tr.anchorMax = new Vector2(1f, 1f);
+        tr.anchorMax        = new Vector2(0f, 1f);
-        tr.offsetMin = new Vector2(5f, 0f);
+        tr.pivot            = new Vector2(0f, 0.5f);
-        tr.offsetMax = new Vector2(downloaded ? -18f : -3f, -1f);
+        tr.anchoredPosition = Vector2.zero;
+        tr.sizeDelta        = new Vector2(500f, 0f);
         var tTmp = titleGO.AddComponent<TextMeshProUGUI>();
-        if (cardFont != null) tTmp.font = cardFont;
+        if (_cardFont != null) tTmp.font = _cardFont;
         tTmp.text              = song.title;
         tTmp.fontSize          = 5f;
         tTmp.color             = Color.white;
         tTmp.alignment         = TextAlignmentOptions.MidlineLeft;
-        tTmp.overflowMode = TextOverflowModes.Ellipsis;
+        tTmp.overflowMode      = TextOverflowModes.Overflow;
+        tTmp.enableWordWrapping = false;
+        titleGO.AddComponent<MarqueeText>();
 
         // Artist
         var artistGO = new GameObject("Artist");
@@ -146,7 +171,7 @@ public class SongSelectManager : MonoBehaviour
         ar.offsetMin = new Vector2(5f, 1f);
         ar.offsetMax = new Vector2(-3f, 0f);
         var aTmp = artistGO.AddComponent<TextMeshProUGUI>();
-        if (cardFont != null) aTmp.font = cardFont;
+        if (_cardFont != null) aTmp.font = _cardFont;
         aTmp.text      = song.artist;
         aTmp.fontSize  = 4f;
         aTmp.color     = new Color(1f, 1f, 1f, 0.6f);

Assets/TextMesh Pro/Fonts/NanumGothic SDF.asset

@@ -257917,7 +257917,8 @@ MonoBehaviour:
     m_MarkToBaseAdjustmentRecords: []
     m_MarkToMarkAdjustmentRecords: []
   m_ShouldReimportFontFeatures: 0
-  m_FallbackFontAssetTable: []
+  m_FallbackFontAssetTable:
+  - {fileID: 11400000}
   m_FontWeightTable:
   - regularTypeface: {fileID: 0}
     italicTypeface: {fileID: 0}
@@ -258046,9 +258047,9 @@ Material:
     - _OutlineWidth: 0
     - _PerspectiveFilter: 0.875
     - _Reflectivity: 10
-    - _ScaleRatioA: 1
+    - _ScaleRatioA: 0
-    - _ScaleRatioB: 1
+    - _ScaleRatioB: 0
-    - _ScaleRatioC: 1
+    - _ScaleRatioC: 0
     - _ScaleX: 1
     - _ScaleY: 1
     - _ShaderFlags: 0