diff --git a/_sass/main.scss b/_sass/main.scss
index 4b532dd..04bae3f 100644
--- a/_sass/main.scss
+++ b/_sass/main.scss
@@ -9,3 +9,20 @@ a:hover {
 img {
     max-width: 100%;
 }
+
+table, th, td {
+  border: 1px solid black;
+  border-collapse: collapse;
+  padding: 1em;
+}
+
+/* Use "responsive" tables. See
+   https://www.w3schools.com/howto/howto_css_table_responsive.asp
+   https://stackoverflow.com/a/62451601
+ */
+table {
+    overflow-x:auto;
+    margin: 0;
+    border: none;
+    display: block;
+}