.page-sidebar{width:220px;background:#f8f9fa;border-radius:8px;padding:1rem;height:fit-content;position:sticky;top:2rem;box-shadow:0 2px 8px rgba(0,0,0,0.1);flex-shrink:0}.page-sidebar h3{margin:0 0 1rem 0;color:#2c3e50;font-size:1.1rem;border-bottom:2px solid #e9ecef;padding-bottom:0.5rem}.sidebar-section{margin-bottom:0.5rem}.collapsible-header{display:flex;align-items:center;justify-content:space-between;cursor:pointer;padding:0.5rem;background:#e9ecef;border-radius:4px;margin:0 0 0.25rem 0;font-size:0.85rem;font-weight:600;color:#495057;transition:background 0.2s ease}.collapsible-header:hover{background:#dee2e6}.sidebar-list{list-style:none;padding:0;margin:0}.sidebar-list a{display:block;padding:0.3rem 0.5rem;color:#495057;text-decoration:none;border-radius:3px;transition:all 0.2s ease;font-size:0.8rem}.sidebar-list a:hover{background:#e9ecef;color:#2c3e50}