/* R61 clean menus: categories fold open and closed (nav61.js) */
#sidebar .navgroup[data-nav61] { cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 8px; user-select: none; border-radius: 10px; padding-right: 8px; }
#sidebar .navgroup[data-nav61]::after { content: '▸'; font-size: .9em; opacity: .7; transition: transform .2s; }
#sidebar .navgroup[data-nav61].nav61-open::after { transform: rotate(90deg); }
#sidebar .navgroup[data-nav61]:hover { background: rgba(56, 225, 255, .08); }
#sidebar .navgroup[data-nav61]:focus-visible { outline: 3px solid #ffc23d; outline-offset: 2px; }
#sidebar a.navlink[hidden] { display: none !important; }
@media (prefers-reduced-motion: reduce) { #sidebar .navgroup[data-nav61]::after { transition: none; } }