shrink code block on Problem 1 solution slide to fit note-box

The scale-80 directive shrank the whole slide proportionally but the
20-line code block still pushed the note-box off the bottom. Use a
scoped style to shrink just the pre element (0.65em) instead of the
whole slide — keeps the heading and note-box at normal size.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: jeremymanning

slides/programming-basics.md

@@ -54,15 +54,18 @@ songs = [
 
 <div class="tip-box" data-title="Think first">
 
-This looks simple but it's a complete analysis pipeline: **group**, **aggregate**, **sort**, **slice**. You'll do some version of this in every Part II project.
+This looks simple but it's a complete analysis pipeline: **group**, **aggregate**, **sort**, **slice**. You'll likely do some version of this in every Part II project.
 
 </div>
 
 ---
-<!-- _class: scale-80 -->
 
 # Problem 1: one reasonable solution
 
+<style scoped>
+section pre { font-size: 0.65em; line-height: 1.25; margin-bottom: 0.5em; }
+</style>
+
 ```python
 # Step 1: group plays by genre
 plays_by_genre = {}