/* Hierarchical tool navigation. Link opens the guide; the adjacent button toggles its children. */
#sidebar .nav-list,#sidebar .nav-children,#sidebar .nav-subgroup ul{list-style:none;margin:0;padding:0}
#sidebar li{margin:0;padding:0}
#sidebar .nav-tool-row{display:flex;align-items:center;border-radius:7px}
#sidebar .nav-tool-row>a{flex:1;min-width:0;padding-right:4px}
#sidebar .nav-disclosure{flex:0 0 32px;width:32px;height:32px;display:grid;place-items:center;border:0;border-radius:6px;background:transparent;color:var(--muted);margin-right:3px}
#sidebar .nav-disclosure:hover{background:var(--surface);color:var(--text)}
#sidebar .nav-disclosure svg{width:14px;height:14px;transition:transform .18s ease;opacity:1}
#sidebar .nav-disclosure[aria-expanded=true] svg{transform:rotate(90deg)}
#sidebar .nav-children{margin:3px 0 10px 20px;padding-left:12px;border-left:1px solid var(--line)}
#sidebar .nav-children[hidden]{display:none!important}
#sidebar .nav-children a{height:auto;min-height:34px;padding:7px 9px;font-size:13px;line-height:1.5;white-space:normal}
#sidebar .nav-children a span{overflow:visible;text-overflow:clip}
#sidebar .nav-subgroup-label{display:block;font-size:11px;font-weight:600;color:var(--muted);padding:10px 9px 4px}
#sidebar .contains-current>.nav-tool-row>a:not([aria-current]){color:var(--text);font-weight:600}
#sidebar .nav-tool-row:has(a[aria-current]){background:var(--soft)}
#sidebar .nav-tool-row a[aria-current]{background:transparent}
#sidebar .nav-group a[aria-current]{font-weight:600}
.breadcrumb-separator{padding:0 10px;color:var(--muted)}
@media(prefers-reduced-motion:reduce){#sidebar .nav-disclosure svg{transition:none}}
.tool-guide-group{margin:24px 0;padding:0 0 16px;border-bottom:1px solid var(--line)}
.tool-guide-group h3{font-size:18px;margin-bottom:8px}.tool-guide-group p{font-size:14px;margin:4px 0}.tool-guide-group ul{margin:8px 0}