/* ============================================================ lesson-sections.css Canonical presentation for the three teaching sections every topic page should have: Worked Examples, Exam-Style Practice Problems, and Practice Problems. These rules were lifted verbatim from ch1-separable.html, which is the reference page. Every other lesson had drifted: some defined their own colours, some were missing .quiz-question, .feedback, .quiz-choices and .toggle-icon entirely (they are not in styles.css), so their practice sections rendered unstyled. This file is linked LAST in , after each page's own inline