.mu-tool { background:#222; color:#ccc; border:1px solid #333; border-radius:4px; padding:4px 10px; font-size:11px; cursor:pointer; white-space:nowrap; }
    .mu-tool:hover { background:#333; color:#fff; }
    .mu-tool.active { background:var(--brand,#1a56db); color:#fff; border-color:var(--brand,#1a56db); }