diff --git a/core/renderer.py b/core/renderer.py
index ab52b82..b9a4846 100644
--- a/core/renderer.py
+++ b/core/renderer.py
@@ -311,18 +311,23 @@ class ExcelRenderer:
         return str(value)
 
     def _draw_text(self, draw, text, x1, y1, x2, y2, font, color, h_align, v_align, font_size):
-        # Calculate available width
+        # Calculate available width and height
         max_width = x2 - x1 - 10
-        text_width = draw.textlength(text, font=font)
         
-        # Simple truncation if too long
-        if text_width > max_width and len(text) > 3:
-             # Estimate chars that fit
+        # Use multiline_textbbox for accurate measurement of potentially multiline text
+        bbox = draw.multiline_textbbox((0, 0), text, font=font)
+        text_width = bbox[2] - bbox[0]
+        text_height = bbox[3] - bbox[1]
+        
+        # Simple truncation if too long (only for single line or very long text)
+        if text_width > max_width and "\n" not in text and len(text) > 3:
              char_ratio = max_width / text_width
              keep_chars = int(len(text) * char_ratio) - 2
              if keep_chars > 0:
                  text = text[:keep_chars] + "..."
-                 text_width = draw.textlength(text, font=font) # Re-measure
+                 bbox = draw.multiline_textbbox((0, 0), text, font=font)
+                 text_width = bbox[2] - bbox[0]
+                 text_height = bbox[3] - bbox[1]
 
         # Horizontal Position
         if h_align == 'center':
@@ -332,14 +337,13 @@ class ExcelRenderer:
         else: # left
             text_x = x1 + 5
             
-        # Vertical Position (Approximate, using fixed height)
-        # Use font_size as a proxy for height (approximation)
-        font_height = font_size 
+        # Vertical Position
         if v_align == 'top':
             text_y = y1 + 5
         elif v_align == 'bottom':
-            text_y = y2 - font_height - 5
+            text_y = y2 - text_height - 5
         else: # center
-            text_y = y1 + (y2 - y1 - font_height) / 2
+            text_y = y1 + (y2 - y1 - text_height) / 2
 
-        draw.text((text_x, text_y), text, fill=color, font=font)
+        # Use multiline_text to support \n
+        draw.multiline_text((text_x, text_y), text, fill=color, font=font, align=h_align)