Use tabular nums in dd/dt

Change-Id: I3a6d820e4d43ca2baf26d61dec23c49f27fc2ebf
diff --git a/css/derekovecs.css b/css/derekovecs.css
index 24236ad..be98310 100644
--- a/css/derekovecs.css
+++ b/css/derekovecs.css
@@ -398,7 +398,14 @@
     float: left;
     clear: left;
     width: 25ex;
+    font-variant-ligatures: common-ligatures;
+    font-variant-numeric: tabular-nums;
     text-align: right;
     font-weight: bold;
     margin-right: 1ex;
+}
+
+dd {
+    font-variant-ligatures: common-ligatures;
+    font-variant-numeric: tabular-nums;
 }
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