.calc-presets{grid-template-columns:1fr 1fr;gap:8px;display:grid}.calc-preset-btn{min-height:38px;padding:8px 10px;font-size:.8rem}.calc-alert{border-radius:var(--radius-sm);color:var(--danger);background:#d938481f;border:1px solid #d9384859;margin-bottom:12px;padding:12px;font-size:.85rem}.calc-results-box{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-md);flex-direction:column;gap:12px;padding:14px;display:flex}.calc-Latex-box{background:var(--surface);border-radius:var(--radius-sm);justify-content:center;align-items:center;min-height:48px;padding:8px;display:flex;overflow-x:auto}.calc-metric-grid{grid-template-columns:1fr 1fr;gap:10px;display:grid}.calc-metric{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);flex-direction:column;padding:10px;display:flex}.calc-metric-label{color:var(--text-secondary);font-size:.75rem}.calc-metric-val{font-size:1.25rem;font-family:var(--font-mono);color:var(--primary);margin:4px 0}.calc-metric small{color:var(--text-muted);font-size:.7rem}.calc-tangent-info{font-size:.82rem;font-family:var(--font-mono);color:var(--text-secondary);border-top:1px solid var(--border);padding-top:8px}.calc-stage{flex-direction:column;gap:14px;display:flex}.calc-toolbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;display:flex}.calc-canvas-wrap{border-radius:var(--radius-md);border:1px solid var(--border);background:var(--bg);position:relative;overflow:hidden}#calculus-canvas{cursor:grab;width:100%;height:540px;display:block}#calculus-canvas:active{cursor:grabbing}