
:root{--bg:#f6f8fb;--card:#fff;--ink:#172033;--muted:#5d6677;--line:#dfe4ea;--brand:#155eef;--brand2:#0f47b8;--ok:#0a7c55;--soft:#edf4ff;--soft2:#f0fdf6;--radius:18px;--shadow:0 14px 40px rgba(23,32,51,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--ink);line-height:1.65}a{color:inherit;text-decoration:none}.wrap{width:min(1120px,calc(100% - 32px));margin:auto}.topbar{background:#0e1729;color:#dbe7ff;font-size:.88rem;padding:8px 0}.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.95);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.navin{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:70px}.brand{font-weight:950;font-size:1.38rem;letter-spacing:-.05em}.brand span{color:var(--brand)}.links{display:flex;gap:18px;align-items:center;font-weight:700;font-size:.94rem}.links 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minmax(300px,.8fr);gap:22px;align-items:start}.calc-card,.article{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}.calc-card h1,.article h1{font-size:clamp(1.95rem,4vw,2.85rem);line-height:1.05;letter-spacing:-.05em;margin:4px 0 8px}.formgrid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:24px}.field label{display:block;font-weight:780;font-size:.9rem;margin-bottom:6px}.field input,.field select{width:100%;min-height:46px;border:1px solid #cfd6df;border-radius:11px;padding:0 12px;font:inherit;background:#fff;color:var(--ink)}.field input:focus,.field select:focus{outline:3px solid rgba(21,94,239,.15);border-color:var(--brand)}.wide{grid-column:1/-1}.result{margin-top:20px;border-radius:16px;background:var(--soft);padding:18px;border:1px solid #d4e3ff}.result .big{font-size:2rem;line-height:1.1;font-weight:950;letter-spacing:-.04em;color:#0b3f9a}.result dl{display:grid;grid-template-columns:1fr auto;gap:8px 18px;margin:14px 0 0}.result 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