diff --git a/dashboard_api_rev.py b/dashboard_api_rev.py
index e50d9a9..ebf9262 100644
--- a/dashboard_api_rev.py
+++ b/dashboard_api_rev.py
@@ -356,6 +356,9 @@ def _preset_to_range(period: str | None, start_date, end_date):
             except ValueError:
                 return default
         return _d(start_date, today), _d(end_date, today)
+    # generic 'Nd' window (e.g. 7d / 30d / 90d / 365d) — used by the Fuel Log tab
+    if p.endswith("d") and p[:-1].isdigit() and int(p[:-1]) > 0:
+        return today - timedelta(days=int(p[:-1]) - 1), today
     # default + '7d'
     return today - timedelta(days=6), today