.noticebar{background:#e8f1eb;border-left:4px solid #086d5b;padding:15px;border-radius:12px;margin:0 0 20px;display:flex;align-items:center;gap:15px;flex-wrap:wrap}.routecard{margin:16px 0;padding:20px;border:1px solid var(--border);border-radius:16px;background:white}.graphlegend{display:flex;gap:15px;flex-wrap:wrap;font-size:14px}.graphlegend .exp{color:#2860bd}.graphlegend .log{color:#b2531a}.graphlegend b{font-weight:750}.modelhead{padding:14px}.pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.inputlabel{display:block;font-size:14px}.bases{display:flex;gap:7px;flex-wrap:wrap;margin:13px 0}.bases button{min-width:50px}.principle{font-size:19px;font-weight:650}.point-readout{padding:14px;background:#f2f5ed;border-radius:12px;margin-top:10px}.helpbuttons{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.helpbuttons button{font-size:14px}.smallheading{font-size:16px;letter-spacing:.03em}.taskbox{padding:20px;background:#f7f7f2;border-radius:14px;margin-top:18px}.taskbox .options{margin-bottom:6px}.rulelist p{font-size:15px}.stepsummary{font-size:14px;color:#166b57;border-top:1px solid var(--border);padding:9px 0;margin:0}.skillmenu{display:grid;grid-template-columns:repeat(4,1fr);gap:9px;margin-bottom:20px}.skillmenu button{font-size:14px;text-align:left}.question-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:15px}.fractionbar{font-size:14px;margin:8px 0}.cellbar{display:flex;flex-wrap:wrap;max-width:100%;gap:3px;margin:6px 0}.cellbar span{height:23px;min-width:8px;border:1px solid #95aaa1;background:#f9faf6}.cellbar .filled{background:#287b68}.model-controls{padding:14px}.model-controls label{display:block;font-size:14px;font-weight:650;margin-top:12px}.model-controls input[type=range]{width:100%}.model-controls select{font-size:15px}.base-rule{font-size:16px}.fractionentry{min-width:155px;max-width:100%;padding:11px;border:1px solid #879e93;border-radius:10px;font-size:19px}.diagresult{max-width:900px;margin:auto}.recommend{display:grid;gap:12px}.recommend button{text-align:left}.practice-status{font-size:13px;color:var(--muted);min-height:24px}.progressline{display:flex;justify-content:space-between;gap:8px;font-size:14px;color:var(--muted)}.model-equation{font-family:Georgia,serif;font-size:30px;text-align:center;padding:25px 8px}.proof{background:#eef4ec;padding:14px;border-radius:10px;font-size:16px}.tablewrap{overflow-x:auto}table.place{font-family:monospace;text-align:center}table.place td,table.place th{text-align:center;min-width:30px;padding:6px}.stepgraph{background:white;border-radius:12px;margin-top:12px}.context-label{font-size:13px;color:var(--muted)}.mini-result{border-left:4px solid #b36329;padding:10px 16px;background:#fff5e8}.mobile-prompt{display:none}@media(max-width:780px){.skillmenu{grid-template-columns:1fr 1fr}.mobile-prompt{display:block;background:#e8f1eb;border-radius:10px;padding:14px;margin:0 0 18px}.bases button{font-size:14px}.pair{grid-template-columns:1fr 1fr;gap:8px}.graphlegend{font-size:13px}.card{min-width:0}.tablewrap{max-width:100%}.model-equation{font-size:25px}}

.mobile-skill{display:none}@media(max-width:780px){.skillmenu{display:none}.mobile-skill{display:block;font-weight:650;margin-bottom:16px}.mobile-skill select{width:100%;margin-top:8px}.progressline{flex-wrap:wrap}}