:root{--bg:#f7f7f5;--card:#ffffff;--ink:#1d1d1f;--muted:#6b6b70;--line:#e4e4e0;--accent:#2f6b4f;--accent-soft:#e7f1ec;--warn:#9a4b16;--warn-soft:#fbefe6}*{box-sizing:border-box}body,html{margin:0;padding:0}body{background:var(--bg);color:var(--ink);font-family:Hiragino Sans,Noto Sans JP,system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}.wrap{max-width:980px;margin:0 auto;padding:40px 20px 80px}header h1{font-size:30px;margin:0 0 6px;letter-spacing:.01em}header p.lead{color:var(--muted);margin:0}.badge{display:inline-block;font-size:12px;color:var(--accent);background:var(--accent-soft);padding:2px 10px;border-radius:999px;margin-bottom:12px}nav.tabs{display:flex;gap:8px;margin:28px 0 16px;flex-wrap:wrap}nav.tabs button{border:1px solid var(--line);background:var(--card);color:var(--ink);padding:8px 16px;border-radius:999px;font-size:14px;cursor:pointer}nav.tabs button.active{background:var(--ink);color:#fff;border-color:var(--ink)}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px;margin-bottom:20px}.card h2{font-size:20px;margin:0 0 4px}.card p.sub{color:var(--muted);margin:0 0 18px;font-size:14px}.grid{display:grid;grid-template-columns:1fr 1fr;grid-gap:24px;gap:24px}@media (max-width:760px){.grid{grid-template-columns:1fr}header h1{font-size:24px}}.fields{display:grid;grid-gap:12px;gap:12px}.field label{display:flex;justify-content:space-between;font-size:13px;color:var(--muted);margin-bottom:4px;gap:8px}.field label code{color:var(--ink);background:#f1f1ee;padding:0 6px;border-radius:4px;font-size:12px}.field input{width:100%;font-size:16px;padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:#fcfcfb;color:var(--ink)}.field input:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}.row2{display:grid;grid-template-columns:1fr 1fr;grid-gap:10px;gap:10px;align-items:end}.result{background:#fbfbf9;border:1px solid var(--line);border-radius:12px;padding:18px}.big{font-size:34px;font-weight:700;letter-spacing:-.01em}.big.pos{color:var(--accent)}.big.neg{color:var(--warn)}.kv{display:grid;grid-template-columns:1fr auto;grid-gap:6px 12px;gap:6px 12px;font-size:14px;margin-top:12px}.kv span:nth-child(odd){color:var(--muted)}.kv span:nth-child(2n){font-feature-settings:"tnum";font-variant-numeric:tabular-nums;text-align:right}.verdict{margin-top:14px;padding:10px 12px;border-radius:8px;font-size:14px}.verdict.ok{background:var(--accent-soft);color:var(--accent)}.verdict.ng{background:var(--warn-soft);color:var(--warn)}.formula{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#f4f4f1;border-radius:8px;padding:10px 12px;overflow-x:auto;white-space:pre}.btn,.formula{font-size:13px}.btn{border:1px solid var(--accent);color:var(--accent);background:#fff;border-radius:8px;padding:6px 12px;cursor:pointer}.btn:hover{background:var(--accent-soft)}.chart{width:100%;height:auto;margin-top:12px}.note{font-size:13px;color:var(--muted)}.links{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:12px;gap:12px}@media (max-width:760px){.links{grid-template-columns:1fr}}.links a,.links div{display:block;border:1px solid var(--line);border-radius:12px;padding:14px;text-decoration:none;color:var(--ink);background:#fff;font-size:14px}.links a:hover{border-color:var(--accent)}.links small{display:block;color:var(--muted);margin-top:4px}footer{margin-top:32px;font-size:12px;color:var(--muted)}