feat: storybook

.storybook/preview.css

@@ -0,0 +1,19 @@
+/* Calm dark canvas. Uses the felt's subtle radial glow (no heavy fixed
+   grain) so the story sits on-brand without flooding the frame. The
+   --bg-glow / --ink tokens come from the imported stylesheet and react
+   to the data-theme toggle automatically. */
+.sb-show-main {
+  background-color: var(--ink);
+  background-image: var(--bg-glow);
+  background-size: cover;
+  background-repeat: no-repeat;
+  background-attachment: fixed;
+}
+
+/* Autodocs preview blocks: same dark surface as the canvas. */
+.docs-story,
+.sbdocs-preview {
+  background-color: var(--ink) !important;
+  background-image: var(--bg-glow);
+  background-size: cover;
+}