Add Dead Orbit CSS

full/style.css

@@ -76,6 +76,7 @@ h6 {
 /* https://smolweb.org/subset.html */
 /* structural */
 body {
+  background: #383838;
   margin: 0 auto;
   max-width: max(768px, 100ch);
 }
@@ -87,12 +88,17 @@ html {
 
 
 /* semantic */
-header strong {
+header {
+  background: #afafaf;
+
+  strong {
     margin: 0.5rem;
     font-size: 1.6rem;
   }
+}
 
 footer {
+  background: #afafaf;
   font-size: 0.9rem;
 
   p {
@@ -101,7 +107,8 @@ footer {
 }
 
 main {
-  margin: 1rem;
+  background: #cccccc;
+  padding: 1rem;
 }
 
 nav {