:root{--ink:#1a2233;--ink-soft:#48546b;--muted:#6b7688;--line:#e4e8ef;--line-soft:#eef1f6;--bg:#ffffff;--bg-soft:#f7f9fc;--brand:#16624a;--brand-ink:#0f4a37;--brand-soft:#e7f2ed;--accent:#b8862a;--good:#16624a;--radius:10px;--wrap:1060px;--shadow:0 1px 2px rgba(16,32,24,0.04),0 4px 16px rgba(16,32,24,0.05)}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:17px}.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}h1,h2,h3,h4{color:var(--ink);line-height:1.25;font-weight:700;letter-spacing:-.01em}h1{font-size:clamp(1.55rem,4vw,2.1rem);margin:0 0 .5rem}h2{font-size:1.32rem;margin:2.2rem 0 .75rem}h3{font-size:1.08rem;margin:1.5rem 0 .5rem}p{margin:0 0 1rem}small{color:var(--muted)}.site-header{border-bottom:1px solid 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label{display:flex;flex-direction:column;gap:4px;font-size:.85rem;font-weight:600;color:var(--ink-soft)}.calc input,.calc select{font-size:1rem;padding:9px 11px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);font-family:inherit}.calc .result{margin-top:14px;padding:14px 16px;background:#fff;border:1px solid #cfe3d9;border-radius:8px}.calc .result .big{font-size:1.7rem;font-weight:800;color:var(--brand-ink)}.calc .result .row{display:flex;justify-content:space-between;padding:3px 0;font-size:.95rem;border-bottom:1px dashed var(--line)}.calc .note{font-size:.82rem;color:var(--muted);margin-top:8px}.stamp{font-size:.85rem;color:var(--muted);margin:1.2rem 0;padding-top:12px;border-top:1px solid var(--line-soft)}.stamp strong{color:var(--ink-soft)}.disclaimer{font-size:.85rem;color:var(--muted);background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:12px 15px;margin:1.2rem 0}.callout{border-left:3px solid 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