Add citation utility class and improve grid naming

- Rename layout-2col grid area 'footer' to 'buffer' for clarity
- Add .cite utility class for bottom-left citations
- Include citation examples in both demo presentations
- Document citation usage in README

1 files changed, 10 insertions, 0 deletions

diff --git a/README b/README
index 8f69673..9f18db3 100644
--- a/README
+++ b/README
@@ -54,6 +54,16 @@ Text content
 </div>
 ```
 
+### `cite` - Citation/Attribution
+```markdown
+---
+### Slide Title
+
+Your content here
+
+<div class="cite">[Author et al., Year]</div>
+```
+
 ### Default - Single Column
 ```markdown
 ---