/* SIDEBAR */
#sidebar {
    width:var(--sidebar-w); min-width:var(--sidebar-w);
    background:var(--bg2); border-right:1px solid var(--border);
    display:flex; flex-direction:column; overflow:hidden;
}
.sidebar-hdr {
    padding:10px 14px 6px;
    font-size:11px; font-weight:700; letter-spacing:.08em;
    text-transform:uppercase; color:var(--muted);
    display:flex; align-items:center; justify-content:space-between;
}
.sidebar-hdr a { font-size:11px; color:var(--accent); text-decoration:none; }
#cat-tree { overflow-y:auto; flex:1; padding:4px 0 12px; }