.nav-calc{--nav-ink:#122d35;--nav-line:#c9d8d6;--nav-paper:#fff;--nav-water:#006779;--nav-current:#ad4d08;--nav-ground:#6449a8;color:var(--nav-ink);font:inherit;line-height:1.65;min-width:0}.nav-calc *{box-sizing:border-box}.nav-calc h2{font-size:clamp(1.35rem,3vw,1.8rem);line-height:1.25;margin:0 0 1rem}.nav-calc h3{line-height:1.35}.nav-calc p{max-width:85ch}.nav-calc__eyebrow{font-family:monospace;font-size:.8rem;overflow-wrap:anywhere;color:#435c62}.nav-calc__lesson,.nav-calc__workspace{margin:1.75rem 0;padding:clamp(1rem,3vw,1.65rem);border:1px solid var(--nav-line);border-radius:16px;background:var(--nav-paper)}.nav-calc__lesson li{margin:.65rem 0;padding-left:.15rem}.nav-calc__equations{background:#eff5f3;border-left:4px solid var(--nav-water);padding:.5rem 1rem;overflow-wrap:anywhere}.nav-calc__equations p{font:600 clamp(.88rem,2vw,1rem)/1.65 ui-monospace,monospace}.nav-calc fieldset{border:0;padding:0;margin:0}.nav-calc legend{font-weight:750;margin-bottom:1rem}.nav-calc__fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.nav-calc__field{min-width:0}.nav-calc label{display:block;font-size:.9rem;font-weight:650;margin-bottom:.4rem}.nav-calc input{font:inherit;min-height:48px;width:100%;border:1px solid #829996;border-radius:8px;padding:.55rem .7rem;background:#fff;color:var(--nav-ink)}.nav-calc input[aria-invalid=true]{border:2px solid #a91f2c}.nav-calc__actions{display:flex;flex-wrap:wrap;gap:.65rem}.nav-calc button{min-height:44px;padding:.6rem .95rem;font:600 .94rem/1.4 inherit;color:var(--nav-ink);border:1px solid #7c9690;border-radius:8px;background:#f1f6f4;cursor:pointer}.nav-calc button[type=submit]{background:#145b52;color:#fff;border-color:#145b52}.nav-calc button:disabled{opacity:.55;cursor:not-allowed}.nav-calc :focus-visible{outline:3px solid #b56816;outline-offset:3px}.nav-calc__help,.nav-calc__privacy,.nav-calc figcaption{font-size:.87rem;color:#415c61}.nav-calc__results{border-top:1px solid var(--nav-line);margin-top:1.4rem;padding-top:1.2rem}.nav-calc__table-wrap{max-width:100%;overflow:auto;margin:1rem 0}.nav-calc table{border-collapse:collapse;width:100%;font-size:.9rem;min-width:310px}.nav-calc caption{text-align:left;font-weight:750;margin-bottom:.65rem}.nav-calc th,.nav-calc td{text-align:left;vertical-align:top;padding:.65rem;border-bottom:1px solid var(--nav-line)}.nav-calc thead th{background:#eef4f2}.nav-calc td{font-variant-numeric:tabular-nums}.nav-calc__visual-result{display:grid;grid-template-columns:minmax(230px,.85fr) minmax(310px,1.3fr);gap:1rem;align-items:start}.nav-calc__figure{min-width:0;margin:1rem 0}.nav-calc__figure svg{display:block;width:100%;max-height:420px;background:#f6f9f8;border:1px solid var(--nav-line);border-radius:10px}.nav-calc svg text{fill:var(--nav-ink);font:15px system-ui,sans-serif}.nav-calc svg path{fill:none;stroke-width:3}.nav-calc svg .nav-calc__axis{stroke:#9bb0ac;stroke-width:1}.nav-calc svg .nav-calc__water{stroke:var(--nav-water)}.nav-calc svg .nav-calc__current{stroke:var(--nav-current);stroke-dasharray:8 4}.nav-calc svg .nav-calc__ground{stroke:var(--nav-ground);stroke-width:4}.nav-calc svg .nav-calc__arrow{stroke-width:1;fill:currentColor;stroke-dasharray:none}.nav-calc .nav-calc__water{color:var(--nav-water)}.nav-calc .nav-calc__current{color:var(--nav-current)}.nav-calc .nav-calc__ground{color:var(--nav-ground)}.nav-calc__legend{display:flex;flex-wrap:wrap;gap:.3rem 1rem;font-size:.85rem;font-weight:700;margin:.5rem 0}.nav-calc__warnings,.nav-calc__limits{background:#fff9eb;border-color:#e3c792}.nav-calc__warnings{padding:1rem 1rem 1rem 2rem;border-left:4px solid #b56816}.nav-calc [role=alert]{color:#9f1e2a}.nav-calc [hidden]{display:none!important}@media(max-width:640px){.nav-calc__fields,.nav-calc__visual-result{grid-template-columns:minmax(0,1fr)}.nav-calc__lesson,.nav-calc__workspace{padding:1rem}.nav-calc__actions button{flex:1 1 140px}.nav-calc th,.nav-calc td{padding:.5rem}.nav-calc__figure svg{max-height:350px}}@media(prefers-reduced-motion:reduce){.nav-calc *{scroll-behavior:auto}}@media print{.nav-calc__actions,.nav-calc__results>button{display:none}.nav-calc__lesson,.nav-calc__workspace{break-inside:avoid}.nav-calc__table-wrap{overflow:visible}}