style: small improvements

Signed-off-by: Felipe Contreras <[email protected]>

Author: felipec

style.css

@@ -23,6 +23,7 @@ body {
 
 #help {
   font-family: sans-serif;
+  background-color: hsl(240, 6.25%, 93.75%);
   flex: 1;
   padding: 8px;
 }
@@ -36,6 +37,10 @@ h1 {
   font-size: 1.4em;
 }
 
+code {
+  border-radius: 4px;
+}
+
 .hljs-class {
   font-weight: bold;
 }