diff --git a/content/style.scss b/content/style.scss
index 77cca35..8aadf7e 100644
--- a/content/style.scss
+++ b/content/style.scss
@@ -275,6 +275,20 @@ pre {
   padding: $margin/2 $margin; 
 }
 
+/* tables */
+table {
+  margin-left: auto;
+  margin-right: auto;
+  border-collapse: collapse;
+}
+
+td, th {
+  border: 1px solid $h1;
+  text-align: center;
+  vertical-align: middle;
+  padding: 0.5em;
+}
+
 /* pygments code highlighting */
 pre span.hll { background-color: $bg }
 pre span.c { color: #408080; font-style: italic } /* Comment */