Initial setup page content

Rewritten with a17t. Content right now is just a copy of the original
setup.html, but settings for new features will be added later.Currently
all cards are shown, only the current one will show in future.

css/base.css

@@ -39,6 +39,22 @@
     }
 }
 
+.banner {
+    margin: calc(-1 * var(--spacing-4,1rem));
+}
+
+.banner.header {
+    margin-bottom: var(--spacing-4,1rem);
+}
+
+.banner.footer {
+    margin-top: var(--spacing-4,1rem);
+    padding: var(--spacing-4,1rem);
+}
+
+div.card:contains(section.banner.footer) {
+    padding-bottom: 0px;
+}
 
 .tab-button {
     font-size: 2rem;
@@ -256,6 +272,10 @@ sup.\~critical, .text-critical {
     justify-content: center;
 }
 
+.middle {
+    align-items: center;
+}
+
 .no-lp {
     padding-left: 0px;
 }