diff --git a/backend/export.py b/backend/export.py
index 4feb441..e8ae206 100644
--- a/backend/export.py
+++ b/backend/export.py
@@ -550,6 +550,9 @@ def generate_export_html(
             padding: 0.5em 1em;
             text-align: left;
         }}
+        .markdown-preview th[align="left"],   .markdown-preview td[align="left"]   {{ text-align: left; }}
+        .markdown-preview th[align="right"],  .markdown-preview td[align="right"]  {{ text-align: right; }}
+        .markdown-preview th[align="center"], .markdown-preview td[align="center"] {{ text-align: center; }}
         
         .markdown-preview th {{
             background-color: var(--bg-secondary, #f6f8fa);
diff --git a/frontend/index.html b/frontend/index.html
index b1018fc..a2b9f06 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -432,6 +432,9 @@
             padding: 0.75rem 1rem;
             text-align: left;
         }
+        .markdown-preview th[align="left"],   .markdown-preview td[align="left"]   { text-align: left; }
+        .markdown-preview th[align="right"],  .markdown-preview td[align="right"]  { text-align: right; }
+        .markdown-preview th[align="center"], .markdown-preview td[align="center"] { text-align: center; }
         .markdown-preview th { 
             background-color: var(--bg-tertiary);
             font-weight: 600;