.calculator-shell{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.85fr);gap:28px;align-items:start}.calculator-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:26px;box-shadow:0 1px 3px rgba(10,22,40,.05)}.calculator-card h2{margin-top:0}.calculator-fields{display:grid;grid-template-columns:1fr 1fr;gap:16px}.calculator-field{display:flex;flex-direction:column;gap:7px}.calculator-field.wide{grid-column:1/-1}.calculator-field label{font-weight:600;font-size:.875rem}.calculator-field input,.calculator-field select,.calculator-bom{width:100%;box-sizing:border-box;border:1px solid var(--border);border-radius:8px;padding:11px 12px;background:#fff;color:var(--text);font:inherit}.calculator-bom{min-height:190px;margin-top:16px;font:12px/1.55 ui-monospace,SFMono-Regular,Menlo,monospace}.calculator-result{margin:18px 0 0;padding:18px;border-left:4px solid var(--accent);background:var(--surface);border-radius:6px}.calculator-result strong{display:block;font-size:1.65rem;color:var(--navy);margin-bottom:4px}.calculator-result span{color:var(--muted);font-size:.9rem}.calculator-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:16px}.formula-card{background:var(--navy);color:#fff;border-radius:14px;padding:26px}.formula-card h2,.formula-card h3{color:#fff}.formula-card p,.formula-card li{color:rgba(255,255,255,.76)}.formula{font:600 1rem/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;color:#fff;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);padding:14px;border-radius:8px}@media(max-width:760px){.calculator-shell{grid-template-columns:1fr}.calculator-fields{grid-template-columns:1fr}.calculator-field.wide{grid-column:auto}}