add ul.grid, improve /create and SLayout

src/app.html

@@ -187,6 +187,26 @@ ul.column {
   padding: 0;
 }
 
+ul.grid {
+  list-style: none;
+  padding: 0;
+  display: grid;
+  grid-template-columns: 1fr 1fr 1fr 1fr;
+  grid-template-rows: auto;
+}
+
+ul.grid > li {
+  border: 1px solid var(--border);
+  border-radius: .5em;
+  padding: .5em;
+  margin: 1em .5em;
+  text-align: center;
+}
+
+ul.grid > li small {
+  display: block;
+}
+
 a svg {
   text-decoration: none;
 }