.nexa-calc{
  --petrol:#0F2A33;--petrol-2:#16404d;--sun:#F4A300;--sun-soft:#ffd680;
  --paper:#F7F5F0;--line:#dfe5e3;--ink:#0F2A33;--muted:#5d6f73;--good:#1f8a5b;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);max-width:860px;margin:0 auto;background:var(--paper);
  border:1px solid var(--line);border-radius:18px;overflow:hidden;
  box-shadow:0 10px 40px rgba(15,42,51,.08);box-sizing:border-box;
}
.nexa-calc *{box-sizing:border-box}
.nexa-calc .nexa-head{background:linear-gradient(135deg,var(--petrol),var(--petrol-2));color:#fff;padding:30px 32px 26px}
.nexa-calc .eyebrow{font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--sun-soft);font-weight:600}
.nexa-calc .nexa-head h2{font-size:26px;margin:8px 0 0;font-weight:700;line-height:1.2;color:#fff}
.nexa-calc .nexa-head p{color:#cfdcdf;margin:8px 0 0;font-size:15px;max-width:560px}
.nexa-calc .nexa-body{padding:28px 32px}
.nexa-calc .seg{display:flex;gap:8px;background:#eceeec;padding:5px;border-radius:12px;margin-bottom:24px}
.nexa-calc .seg button{flex:1;border:0;background:transparent;padding:11px;border-radius:8px;font-size:15px;font-weight:600;color:var(--muted);cursor:pointer;transition:.15s}
.nexa-calc .seg button.on{background:#fff;color:var(--petrol);box-shadow:0 2px 6px rgba(0,0,0,.06)}
.nexa-calc .field{margin-bottom:22px}
.nexa-calc .field label{display:block;font-weight:600;font-size:14px;margin-bottom:6px}
.nexa-calc .hint{font-size:12.5px;color:var(--muted);font-weight:400}
.nexa-calc .row{display:flex;align-items:center;gap:14px}
.nexa-calc input[type=range]{flex:1;accent-color:var(--sun);height:6px}
.nexa-calc .val{min-width:104px;text-align:right;font-weight:700;font-size:16px;color:var(--petrol)}
.nexa-calc .toggle{display:flex;align-items:center;gap:10px;cursor:pointer;user-select:none;font-weight:600;font-size:14px}
.nexa-calc .toggle input{width:20px;height:20px;accent-color:var(--sun)}
.nexa-calc .result{background:var(--petrol);color:#fff;border-radius:14px;padding:24px;margin-top:8px}
.nexa-calc .result h3{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--sun-soft);margin:0 0 16px}
.nexa-calc .grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.nexa-calc .stat .k{font-size:12.5px;color:#bcd0d4}
.nexa-calc .stat .v{font-size:24px;font-weight:700;margin-top:2px}
.nexa-calc .stat .v small{font-size:14px;font-weight:500;color:#cfdcdf}
.nexa-calc .amort{margin-top:18px;padding-top:18px;border-top:1px solid rgba(255,255,255,.15);display:flex;justify-content:space-between;align-items:baseline}
.nexa-calc .amort .k{font-size:14px;color:#cfdcdf}
.nexa-calc .amort .v{font-size:22px;font-weight:700;color:var(--sun)}
.nexa-calc .disc{font-size:11.5px;color:var(--muted);margin-top:14px;line-height:1.5}
.nexa-calc .cta-wrap{margin-top:24px;border-top:1px solid var(--line);padding-top:24px}
.nexa-calc .cta-wrap h3{font-size:18px;margin:0 0 4px}
.nexa-calc .cta-wrap p{font-size:14px;color:var(--muted);margin:0 0 18px}
.nexa-calc .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.nexa-calc .form-grid .full{grid-column:1/-1}
.nexa-calc .form-grid input,.nexa-calc .form-grid textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;background:#fff}
.nexa-calc .form-grid input:focus,.nexa-calc .form-grid textarea:focus{outline:2px solid var(--sun);border-color:transparent}
.nexa-calc .nexa-hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0;pointer-events:none}
.nexa-calc .btn{width:100%;border:0;background:var(--sun);color:var(--petrol);font-weight:700;font-size:16px;padding:15px;border-radius:11px;cursor:pointer;margin-top:6px;transition:.15s}
.nexa-calc .btn:hover{background:#ffb524}
.nexa-calc .btn:disabled{opacity:.6;cursor:default}
.nexa-calc .ok{background:#e9f6ef;border:1px solid #b7e2cb;color:var(--good);padding:16px;border-radius:11px;font-size:15px;text-align:center}
.nexa-calc .err{color:#c0392b;font-size:14px;margin-top:8px}
@media(max-width:600px){
  .nexa-calc .nexa-head{padding:24px 20px}
  .nexa-calc .nexa-body{padding:22px 20px}
  .nexa-calc .grid,.nexa-calc .form-grid{grid-template-columns:1fr}
  .nexa-calc .val{min-width:90px;font-size:15px}
}