/* Scoped teacher-hub refinements; the incumbent field-guide tokens remain. */
.topic-mast nav a{flex-direction:column;align-items:flex-start;justify-content:center;line-height:1.4;padding-block:10px;text-decoration:none}
.topic-mast nav a:hover span{text-decoration:underline;text-underline-offset:4px}
.topic-mast nav small{font-size:.76rem;font-weight:400;color:var(--muted);margin-top:3px}
.launch-coverage{font-size:.94rem;color:var(--muted);margin-bottom:22px;max-width:85ch}
.passage-cover{margin:0;align-self:center}
.passage-cover figcaption{font-size:.76rem;line-height:1.4;margin-top:9px;color:var(--muted);text-align:center;max-width:108px}
.topic-source-notes{border-top:1px solid var(--rule);margin-top:42px;padding-top:32px;scroll-margin-top:24px}
.topic-source-notes h3{margin:26px 0 10px}
.topic-source-notes p{max-width:75ch}
.water-selection-note{max-width:75ch}
.featured noscript,.topic-action noscript{grid-column:1/-1}
@media(max-width:800px){.mast-inner{align-items:flex-start;flex-direction:column;padding-block:20px;gap:12px}.topic-mast nav{gap:8px 22px}.topic-mast nav a{padding-block:5px}.topic-mast nav small{font-size:.78rem}}
@media(max-width:600px){.passage-cover{grid-column:1;grid-row:1}.launch-coverage{font-size:.9rem}.topic-mast nav{width:100%;display:grid;grid-template-columns:1fr}.topic-mast nav a{min-height:48px}.topic-mast nav small{margin-top:1px}}