.calculator *{box-sizing:border-box}.calculator a{color:var(--accent)}.calculator .wrap{max-width:1100px;margin:0 auto;padding:0 16px}.calculator header.site{background:var(--head);color:var(--head-ink)}.calculator header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}.calculator .logo{color:var(--head-ink);text-decoration:none;font-weight:800;letter-spacing:.02em;font-size:20px}.calculator .logo span{color:var(--volt)}.calculator header.site nav a{color:var(--head-ink);opacity:.8;text-decoration:none;font-size:15px;margin-left:18px}.calculator header.site nav a:hover{opacity:1}.calculator .hero{background:var(--head);color:var(--head-ink);padding:28px 0 64px}.calculator .crumb{font-size:13px;opacity:.65;margin-bottom:10px}.calculator .crumb a{color:inherit}.calculator h1{font-size:clamp(28px,5vw,44px);line-height:1.1;margin:0 0 12px;letter-spacing:-.01em}.calculator h1 em{font-style:normal;color:var(--volt)}.calculator .lead{max-width:680px;opacity:.85;margin:0;font-size:17px}.calculator .grid{display:grid;grid-template-columns:1fr;gap:20px;margin-top:-40px}@media(min-width:900px){.calculator .grid{grid-template-columns:1.15fr .85fr;align-items:start}}.calculator .card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.calculator .card h2{font-size:18px;margin:0 0 14px}.calculator fieldset{border:0;margin:0 0 20px;padding:0}.calculator legend,.calculator .lbl{font-weight:700;font-size:14px;margin-bottom:8px;display:flex;justify-content:space-between;width:100%}.calculator legend small,.calculator .lbl small{font-weight:500;color:var(--muted)}.calculator .hint{font-size:13px;color:var(--muted);margin:6px 0 0}.calculator .seg{display:grid;gap:6px;grid-template-columns:repeat(auto-fit,minmax(0,1fr))}.calculator .seg input{position:absolute;opacity:0;pointer-events:none}.calculator .seg label{display:block;text-align:center;padding:10px 6px;border:1.5px solid var(--line);border-radius:10px;
  cursor:pointer;font-size:14px;font-weight:600;line-height:1.2;user-select:none;transition:.15s}.calculator .seg label small{display:block;font-weight:500;color:var(--muted);font-size:12px;margin-top:2px}.calculator .seg input:checked + label{border-color:var(--accent);background:var(--soft)}.calculator .seg input:focus-visible + label{outline:2px solid var(--accent);outline-offset:2px}.calculator .seg.c4{grid-template-columns:repeat(2,1fr)}@media(min-width:520px){.calculator .seg.c4{grid-template-columns:repeat(4,1fr)}}.calculator .seg.modes{display:flex;flex-wrap:wrap}.calculator .seg.modes label{flex:1 1 calc(50% - 6px);min-width:0}.calculator .seg.modes.n3 label,.calculator .seg.modes.n5 label{flex-basis:calc(33.3% - 6px)}@media(min-width:520px){.calculator .seg.modes label{flex-basis:0 !important}}.calculator .select{position:relative}.calculator .select select{width:100%;appearance:none;-webkit-appearance:none;font:inherit;font-size:16px;font-weight:700;color:var(--ink);
  background:var(--bg);border:1.5px solid var(--line);border-radius:10px;padding:11px 40px 11px 12px;cursor:pointer}.calculator .select select:focus{outline:none;border-color:var(--accent)}.calculator .select::after{content:"";position:absolute;right:16px;top:50%;width:8px;height:8px;margin-top:-6px;
  border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);pointer-events:none}.calculator .motor-info{font-size:13px;color:var(--muted);margin:8px 0 0}.calculator .row3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.calculator .num{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted)}.calculator .num input{width:100%;font:inherit;font-size:17px;font-weight:700;color:var(--ink);background:var(--bg);
  border:1.5px solid var(--line);border-radius:10px;padding:9px 10px}.calculator .num input:focus{outline:none;border-color:var(--accent)}.calculator input[type=range]{width:100%;accent-color:var(--accent);height:28px}.calculator .chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}.calculator .chips button{font:inherit;font-size:13px;font-weight:600;border:1.5px solid var(--line);background:transparent;
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