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3rem}.faq-list{flex-direction:column;display:flex}.faq-item{border-bottom:1px solid #ffffff0f}.faq-item__question{cursor:pointer;color:var(--calc-text-primary);user-select:none;justify-content:space-between;align-items:center;padding:14px 4px;font-size:.9rem;font-weight:600;list-style:none;transition:color .2s;display:flex}.faq-item__question::-webkit-details-marker{display:none}.faq-item__question:after{content:"+";font-family:var(--calc-font-mono);color:var(--calc-text-dim);flex-shrink:0;margin-left:16px;font-size:1.1rem;transition:color .2s}.faq-item[open] .faq-item__question:after{content:"−";color:var(--calc-cyan)}.faq-item__question:hover{color:var(--calc-cyan)}.faq-item__answer{color:var(--calc-text-dim);padding:0 4px 14px;font-size:.85rem;line-height:1.75}@media (width<=768px){.input-grid{grid-template-columns:1fr}.equiv-grid{grid-template-columns:repeat(2,1fr)}}[data-theme=light] .input-card,[data-theme=light] .result-card{background:#fff;border-color:#0000001f;box-shadow:0 1px 4px #0000000f}[data-theme=light] .form-group input,[data-theme=light] .form-group select{color:#0f172a;background:#f0f4f9;border-color:#00000026}[data-theme=light] .tab-note{color:#475569}[data-theme=light] .result-value{color:#0891b2}[data-theme=light] .interpretation{color:#334155;background:#eff9fb;border-color:#0891b240 #0891b240 #0891b240 #0891b2}[data-theme=light] .equiv-cell{background:#f0f4f9;border-color:#0000001f}[data-theme=light] .equiv-value{color:#0f172a}[data-theme=light] .ratio-bar{border-color:#0000001f}[data-theme=light] .ratio-bar__seg--a{background:#0891b2}[data-theme=light] .ratio-bar__seg--b{background:#7c3aed}[data-theme=light] .faq-item{background:#fff;border:1px solid #0000001a;border-radius:10px;transition:box-shadow .2s,border-color .2s;overflow:hidden;box-shadow:0 1px 4px #0000000f}[data-theme=light] .faq-list{gap:8px}[data-theme=light] .faq-item:hover{border-color:#0891b259;box-shadow:0 2px 10px #0891b214}[data-theme=light] .faq-item[open]{border-color:#0891b266 #0891b266 #0891b266 #0891b2;border-left-style:solid;border-left-width:3px;box-shadow:0 2px 12px #0891b21a}[data-theme=light] .faq-item__question{color:#0f172a;padding:14px 16px}[data-theme=light] .faq-item__question:after{color:#64748b}[data-theme=light] .faq-item[open] .faq-item__question:after,[data-theme=light] .faq-item__question:hover{color:#0891b2}[data-theme=light] .faq-item__answer{color:#475569;border-top:1px solid #0000000f;padding:12px 16px 16px}.math2-workbench{border:1px solid var(--border,#454559);color:var(--text,inherit);border-radius:16px;margin:24px 0;padding:16px}.math2-workbench summary{cursor:pointer;font-weight:700}.math2-workbench-body{gap:14px;margin-top:18px;display:grid}.math2-fields{grid-template-columns:repeat(auto-fit,minmax(min(100%,220px),1fr));gap:16px;display:grid}.math2-fields .field{gap:8px;display:grid}.math2-fields input,.math2-fields select{width:100%;min-width:0}.math2-table-wrap{overflow-x:auto}.math2-table-wrap table{border-collapse:collapse;width:100%;margin:16px 0}.math2-table-wrap caption{text-align:left;margin:8px 0;font-weight:700}.math2-table-wrap th,.math2-table-wrap td{border-bottom:1px solid var(--border,#454559);text-align:left;overflow-wrap:anywhere;padding:9px}.math2-plot svg{width:100%;height:auto;display:block}.math2-error{color:var(--danger,#f87171)}.math2-workbench :focus-visible{outline:3px solid var(--accent,#818cf8);outline-offset:3px}@media print{.math2-workbench[open]{break-inside:avoid}}.math2-scenario-actions{flex-wrap:wrap;gap:8px;margin:12px 0;display:flex}.math2-explanation{border:1px solid var(--calc-border,#475569);--math2-series-1:#0e7490;--math2-series-2:#7c3aed;--math2-series-3:#b45309;--math2-series-4:#15803d;--math2-series-5:#be185d;border-radius:12px;margin:18px 0;padding:12px}.math2-explanation figcaption{margin-bottom:10px;font-weight:700}.math2-explanation svg{width:100%;max-width:100%;height:auto;display:block}.math2-explanation svg [tabindex]:focus{outline:3px solid var(--accent,#22d3ee)}.math2-visual-table{margin-top:10px}.math2-visual-table summary{cursor:pointer;padding:8px}.math2-saved-tray,.math2-share-preview,.math2-learner{border:1px solid var(--calc-border,#475569);border-radius:10px;margin:16px 0;padding:10px}.math2-share-preview pre{white-space:pre-wrap;overflow-wrap:anywhere;max-height:320px;overflow:auto}.math2-fields input[type=range]{width:100%}.math2-saved-tray summary,.math2-share-preview summary,.math2-learner summary{cursor:pointer;padding:6px}[data-theme=dark] .math2-explanation{--math2-series-1:#22d3ee;--math2-series-2:#a78bfa;--math2-series-3:#fb923c;--math2-series-4:#4ade80;--math2-series-5:#f472b6}.math2-explanation svg text{font-family:var(--calc-font-mono,ui-monospace,monospace)}@media (width<=480px){.math2-explanation svg text{font-size:22px}.math2-explanation[data-math2-visual=tree] svg text{font-size:17px}}.math2-step-control{margin:14px 0}.math2-step-control input{width:100%;margin:8px 0;display:block}.math2-step-control summary{cursor:pointer;padding:6px}