diff --git a/rtfd/public/html/index.css b/rtfd/public/html/index.css
index fab050a..96634a2 100644
--- a/rtfd/public/html/index.css
+++ b/rtfd/public/html/index.css
@@ -1,11 +1,15 @@
 /*
 block-size ← height
+(border|padding)-block[-start|end]
+(border|padding)-inline[-start|end]
 inline-size ← width
 margin-block ← vspace
-padding-block[-start|end]
-padding-inline[-start|end]
 */
 
+* {
+box-sizing: border-box;
+}
+
 html {
 }
 
@@ -13,7 +17,9 @@ body {
 background-color: #111;
 color: #777;
 font-family: sans-serif;
+font-size: 1.5rem;
 line-height: 1.25;
+margin: 1em 2em;
 text-align: start;
 }
 
@@ -30,8 +36,12 @@ background-color: #222;
 }
 
 h1 {
+border-color: #fff;
+border-radius: .25em;
+border-style: solid;
+border-width: .1em;
 color: #f77;
-font-size: 1.75rem;
+font-size: 1.75em;
 text-align: center;
 }