diff --git a/docs/mandoc.css b/docs/mandoc.css
index 2a57a18f..3394c3b9 100755
--- a/docs/mandoc.css
+++ b/docs/mandoc.css
@@ -5,7 +5,10 @@
/* Global defaults. */
-html { max-width: 100ex; }
+/* This is handled in `rgbds.css` instead
+ *
+ * html { max-width: 100ex; }
+ */
body { font-family: Helvetica,Arial,sans-serif; }
table { margin-top: 0em;
margin-bottom: 0em; }
diff --git a/docs/rgbds.css b/docs/rgbds.css
new file mode 100644
index 00000000..67c09fbb
--- /dev/null
+++ b/docs/rgbds.css
@@ -0,0 +1,52 @@
+/* Overrides to default mandoc styling for HTML renders of RGBDS man pages */
+
+html {
+ /* Reduce contrast */
+ background-color: #f8f8f8;
+ color: #222;
+}
+
+body {
+ /* Improve readability */
+ font-size: 16px;
+ line-height: 1.4;
+ text-align: justify;
+
+ /* Center body horizontally (requires to span full width) */
+ margin: 10px auto;
+ /* `mandoc.css`'s default, but it's applied to there */
+ max-width: 100ex;
+}
+@media print {
+ body {
+ /* Max width doesn't make sense for print */
+ max-width: none;
+ /* Make font slightly smaller for printing */
+ font-size: 14px;
+ }
+}
+
+code, pre {
+ font-size: smaller;
+}
+
+/* Separate lines in tables */
+table.Bl-column {
+ border-collapse: collapse;
+}
+table.Bl-column tr:not(:first-child) > td,
+table.Bl-column tr:not(:first-child) > th {
+ border-top: 1px solid #aaa;
+}
+
+table.Bl-column th {
+ /* Apply `.Sy` style to table headers */
+ font-style: normal;
+ font-weight: bold;
+}
+
+table.Bl-column td,
+table.Bl-column th {
+ /* Add horizontal spacing between columns */
+ padding: 2px 7px 0;
+}
diff --git a/src/doc_postproc.awk b/src/doc_postproc.awk
index 265f7aab..de3d3239 100755
--- a/src/doc_postproc.awk
+++ b/src/doc_postproc.awk
@@ -1,5 +1,17 @@
#!/usr/bin/awk -f
+/")
+}
+
+/^\s+
.+<\/b><\/td>$/ {
+ # Assuming that all cells whose contents are bold are heading cells,
+ # use the HTML tag for those
+ sub(/td><\/td/, "th");
+}
+
BEGIN {
in_synopsis = 0
}