.ar-lesson-container{max-width:900px;margin:2rem auto;padding:1rem;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen-Sans,Ubuntu,Cantarell,"Helvetica Neue",sans-serif}.ar-lesson-nav{margin-bottom:1rem}.ar-back-link{display:inline-flex;align-items:center;gap:.375rem;color:#64748b;text-decoration:none;font-size:.9rem;font-weight:500;padding:.5rem .75rem;border-radius:6px;transition:all .2s}.ar-back-link:hover{color:#3b82f6;background-color:#f1f5f9}.ar-back-link .dashicons{font-size:18px;width:18px;height:18px}.ar-lesson-header{margin-bottom:2.5rem;padding-bottom:1.5rem;border-bottom:1px solid #e2e8f0}.ar-lesson-title{font-size:2.5rem;font-weight:700;color:#1a202c;margin-bottom:.5rem}.ar-lesson-description p{font-size:1.1rem;color:#4a5568}.ar-vocab-list-wrapper{background-color:#fff;border-radius:8px;box-shadow:0 4px 6px -1px rgba(0,0,0,.1),0 2px 4px -1px rgba(0,0,0,.06);overflow:hidden}.ar-vocab-list-header{display:flex;justify-content:space-between;padding:1rem 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