Give the shell one header, a skip link, and a cookie-aware first paint.

Breakpoint clones were still in the tab order, marketing always painted Log in, and at 430px the logo overlay covered Use cases and Learn.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/globals.css

@@ -58,3 +58,26 @@ body {
   background-color: black;
   min-height: 100vh;
 }
+
+/* Skip link: parked above the viewport until focused. */
+.skip-to-content {
+  position: absolute;
+  left: var(--spacing-scale-016);
+  top: var(--spacing-scale-016);
+  z-index: 100;
+  padding: var(--spacing-scale-012) var(--spacing-scale-016);
+  border-radius: var(--radius-measures-radius-full);
+  background-color: var(--color-surface-inverse-primary);
+  color: var(--color-content-inverse-primary);
+  text-decoration: none;
+  outline: none;
+  cursor: pointer;
+  box-shadow:
+    0 0 0 2px var(--color-border-default-primary),
+    0 0 0 4px var(--color-border-invert-primary);
+  transform: translateY(-200%);
+}
+.skip-to-content:focus,
+.skip-to-content:focus-visible {
+  transform: translateY(0);
+}