.mastery-panel[hidden]{display:none}
.mastery-panel{padding:12px 8px;color:#403347;border-top:1px solid #dbc6a6}
.mastery-panel h3{margin:0 0 10px;font-size:16px}
.mastery-skills{display:grid;grid-template-columns:1fr 1fr;gap:6px;list-style:none;margin:0;padding:0;font-size:13px}
.mastery-skills li{padding:7px;border:1px solid #dbc6a6;border-radius:9px;background:#fff7e7}
.mastery-skills li[data-complete="true"]{background:#d8f4e9;border-color:#78bba8}
.mastery-panel p{font-size:13px;line-height:1.5}
.mastery-panel button{min-height:44px;padding:8px 16px;border:1px solid #79a698;border-radius:12px;background:#a7e5d6;color:#253d38;font-size:14px;cursor:pointer}
.mastery-panel button:disabled{opacity:.55;cursor:default}
/* Keep the actual touch target stable; the existing glow/art carries payoff. */
.app-shell[data-mastery="true"] .star-core-button.is-ready{animation:none}