.library-source-note{max-width:75ch;padding:1rem 1.2rem;margin-bottom:1rem;border-left:4px solid var(--sky);background:var(--pale);color:var(--ink)}
.drill-source{padding:1rem 1.1rem;margin:1.25rem 0 0;border:1px solid var(--line);border-radius:9px;background:var(--pale);color:var(--ink)!important}
.drill-source strong{color:var(--navy)}