.engineering-calculator{--ink: #102a43;--muted: #52697a;--aqua: #06a5ad;--deep: #004d82;max-width:1240px;margin:0 auto;padding:2rem 2rem 5rem;color:var(--ink)}.engineering-calculator *{box-sizing:border-box}.engineering-calculator .breadcrumb{margin-bottom:1.2rem}.engineering-calculator .breadcrumb a{color:var(--deep);font-size:.8rem;font-weight:800;text-decoration:none}.engineering-calculator .eyebrow{margin:0 0 .65rem;color:var(--aqua);font-size:.68rem;font-weight:850;letter-spacing:.14em;text-transform:uppercase}.engineering-calculator .calculator-hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(360px,.92fr);min-height:390px;overflow:hidden;border-radius:28px;color:#fff;background:linear-gradient(135deg,#063b65,#006d87);box-shadow:0 24px 60px #01456824}.engineering-calculator .hero-copy{align-self:center;padding:3.5rem 1rem 3.5rem 4rem}.engineering-calculator .calculator-hero .eyebrow{color:#8df3ef}.engineering-calculator .calculator-hero h1{margin:0 0 1rem;font-size:clamp(2.2rem,4.4vw,4.1rem);line-height:1.03;letter-spacing:-.048em}.engineering-calculator .calculator-hero p:last-child{max-width:680px;margin:0;color:#d7f3f1;font-size:.96rem;line-height:1.75}.engineering-calculator .calculator-hero img{width:100%;height:100%;min-height:390px;object-fit:cover;object-position:center}.engineering-calculator .calc-workspace{display:grid;grid-template-columns:390px minmax(0,1fr);gap:1rem;margin-top:1rem}.engineering-calculator .calc-inputs,.engineering-calculator .calc-results,.engineering-calculator .explain-card,.engineering-calculator .evidence{border:1px solid #d9e7e9;border-radius:20px;background:#fff}.engineering-calculator .calc-inputs{padding:1.4rem}.engineering-calculator fieldset{margin:0;padding:0 0 1.15rem;border:0}.engineering-calculator fieldset+fieldset{padding-top:1.2rem;border-top:1px solid #e2ecee}.engineering-calculator legend{width:100%;margin-bottom:.9rem;color:var(--deep);font-size:.72rem;font-weight:850;letter-spacing:.09em;text-transform:uppercase}.engineering-calculator label{display:block;margin-bottom:.8rem}.engineering-calculator label>span{display:block;margin-bottom:.34rem;color:#385568;font-size:.72rem;font-weight:750}.engineering-calculator input,.engineering-calculator select{width:100%;min-height:44px;padding:.63rem .72rem;border:1px solid #c8dadd;border-radius:9px;color:var(--ink);background:#fbfdfd;font:inherit;font-size:.84rem}.engineering-calculator input:focus,.engineering-calculator select:focus{border-color:var(--aqua);outline:3px solid rgba(6,165,173,.13)}.engineering-calculator label small,.engineering-calculator .field-help{display:block;margin-top:.4rem;color:#718490;font-size:.65rem;line-height:1.45}.engineering-calculator .field-grid{display:grid;grid-template-columns:1fr 1fr;gap:.65rem}.engineering-calculator .calc-results{padding:2rem;background:radial-gradient(circle at 100% 0,rgba(6,165,173,.1),transparent 30%),#f8fcfc}.engineering-calculator .result-head{display:flex;justify-content:space-between;gap:1rem;align-items:flex-start;margin-bottom:1.25rem}.engineering-calculator .result-head h2{margin:0;font-size:1.35rem}.engineering-calculator .result-head>span{padding:.4rem .6rem;border-radius:8px;color:#26787c;background:#dff4f1;font-size:.67rem;font-weight:850}.engineering-calculator .hero-result{margin-bottom:.75rem;padding:1.5rem;border-radius:15px;color:#fff;background:linear-gradient(135deg,#04517c,#078e97)}.engineering-calculator .hero-result>span{display:block;color:#c9f1ef;font-size:.69rem;font-weight:750}.engineering-calculator .hero-result strong{display:inline-block;margin:.2rem .3rem .25rem 0;font-size:clamp(2.25rem,5vw,4rem);line-height:1;letter-spacing:-.05em}.engineering-calculator .hero-result b{font-size:.86rem}.engineering-calculator .hero-result small{display:block;color:#d5f3f2;font-size:.7rem}.engineering-calculator .result-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.65rem}.engineering-calculator .result-card{min-height:118px;padding:.95rem;border:1px solid #d9e7e9;border-radius:12px;background:#fff}.engineering-calculator .result-card>span{display:block;min-height:2.5em;color:#607584;font-size:.66rem;font-weight:750}.engineering-calculator .result-card strong{font-size:1.35rem;letter-spacing:-.035em}.engineering-calculator .result-card b{color:#536a79;font-size:.65rem}.engineering-calculator .result-card small{display:block;margin-top:.35rem;color:#7b8d98;font-size:.62rem;line-height:1.45}.engineering-calculator .meaning{margin-top:.75rem;padding:1rem;border-left:4px solid var(--aqua);border-radius:0 10px 10px 0;color:#435e70;background:#eaf7f6;font-size:.72rem;line-height:1.6}.engineering-calculator .meaning strong{color:var(--deep)}.engineering-calculator .calc-error{margin-top:.7rem;padding:.7rem;border-radius:8px;color:#872e2e;background:#fff0f0;font-size:.72rem}.engineering-calculator .explain-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1rem}.engineering-calculator .explain-card{padding:1.7rem}.engineering-calculator .explain-card h2,.engineering-calculator .evidence h2,.engineering-calculator .equipment-path h2{margin:0 0 .7rem;font-size:1.3rem}.engineering-calculator .explain-card p,.engineering-calculator .evidence p,.engineering-calculator .equipment-path p{color:var(--muted);font-size:.78rem;line-height:1.7}.engineering-calculator .formula-list{display:grid;gap:.4rem;margin-top:1rem}.engineering-calculator .formula-list span{padding:.6rem .72rem;border-left:3px solid var(--aqua);color:#345468;background:#edf8f7;font-size:.68rem;font-weight:750}.engineering-calculator .steps{margin:.8rem 0 0;padding-left:1.2rem;color:#526a79;font-size:.72rem;line-height:1.65}.engineering-calculator .evidence{display:grid;grid-template-columns:.8fr 1.2fr;gap:2rem;margin-top:1rem;padding:2rem}.engineering-calculator .evidence ul{margin:0;padding:0;list-style:none}.engineering-calculator .evidence li{display:grid;grid-template-columns:minmax(150px,.6fr) 1fr;gap:.8rem;padding:.7rem 0;border-bottom:1px solid #e1ebed;font-size:.68rem;line-height:1.5}.engineering-calculator .evidence a{color:var(--deep);font-weight:800}.engineering-calculator .evidence span{color:#637987}.engineering-calculator .equipment-path{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin-top:1rem;padding:2.5rem;border-radius:20px;background:#eaf7f6}.engineering-calculator .whatsapp-button{display:inline-flex;gap:.7rem;align-items:center;margin-top:.6rem;padding:.75rem 1rem;border-radius:999px;color:#fff;background:var(--deep);font-size:.73rem;font-weight:850;text-decoration:none}.engineering-calculator .related{border-top:1px solid #cae1e1}.engineering-calculator .related a{display:grid;grid-template-columns:32px 1fr auto;gap:.6rem;align-items:center;padding:.8rem 0;border-bottom:1px solid #cae1e1;color:var(--ink);text-decoration:none}.engineering-calculator .related span{color:var(--aqua);font-size:.62rem;font-weight:850}.engineering-calculator .related b{font-size:.75rem}.engineering-calculator .related i{font-style:normal}.engineering-calculator .disclaimer{color:#748692;font-size:.65rem;text-align:center}@media(max-width:900px){.engineering-calculator .calculator-hero{grid-template-columns:1fr}.engineering-calculator .hero-copy{padding:3rem}.engineering-calculator .calculator-hero img{max-height:340px;min-height:0}.engineering-calculator .calc-workspace,.engineering-calculator .evidence,.engineering-calculator .equipment-path{grid-template-columns:1fr}}@media(max-width:620px){.engineering-calculator{padding:1rem 1rem 3rem}.engineering-calculator .calculator-hero{border-radius:20px}.engineering-calculator .hero-copy{padding:2.2rem 1.3rem}.engineering-calculator .calculator-hero h1{font-size:2.3rem}.engineering-calculator .calc-inputs,.engineering-calculator .calc-results{padding:1.1rem}.engineering-calculator .field-grid,.engineering-calculator .result-grid,.engineering-calculator .explain-grid{grid-template-columns:1fr}.engineering-calculator .result-card{min-height:98px}.engineering-calculator .evidence,.engineering-calculator .equipment-path{padding:1.5rem 1.1rem}.engineering-calculator .evidence li{grid-template-columns:1fr;gap:.2rem}}