:root{--bg:#f7f7f5;--card:#ffffff;--text:#1b1d1f;--muted:#62676d;--line:#d9dde1;--accent:#1f6f5f;--accent2:#e9f3f0;--warn:#8a5a10;--shadow:0 8px 28px rgba(0,0,0,.06);--radius:18px;--max:1120px}*{box-sizing:border-box}.skip-link{position:absolute;left:-9999px;top:8px;background:#fff;color:#111;padding:10px 14px;border-radius:8px;z-index:999}.skip-link:focus{left:8px}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,"Hiragino Sans","Yu Gothic UI","Yu Gothic",Meiryo,sans-serif;background:var(--bg);color:var(--text);line-height:1.7}a{color:var(--accent);text-decoration-thickness:.08em;text-underline-offset:.18em}header{border-bottom:1px solid var(--line);background:rgba(247,247,245,.94);position:sticky;top:0;z-index:20;backdrop-filter:blur(10px)}.nav{max-width:var(--max);margin:auto;padding:14px 20px;display:flex;gap:18px;align-items:center;justify-content:space-between}.brand{font-weight:800;text-decoration:none;color:var(--text);letter-spacing:.01em}.nav-links{display:flex;gap:14px;flex-wrap:wrap;align-items:center}.nav-links a{text-decoration:none;color:var(--muted);font-size:.94rem}.container{max-width:var(--max);margin:auto;padding:36px 20px 72px}.hero{padding:34px 0 24px}.eyebrow{font-size:.8rem;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}h1{font-size:clamp(2rem,5vw,3.8rem);line-height:1.08;margin:.25em 0 .35em;letter-spacing:-.035em}h2{font-size:clamp(1.45rem,3vw,2rem);line-height:1.25;margin:1.6em 0 .6em}h3{margin:1.25em 0 .45em}.lead{font-size:1.12rem;color:var(--muted);max-width:780px}.grid{display:grid;grid-template-columns:repeat(12,1fr);gap:18px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.tool-card{grid-column:span 4}.tool-card h3{margin-top:0}.tool-card p{color:var(--muted)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--accent);color:white;text-decoration:none;border:0;border-radius:999px;padding:11px 16px;font-weight:700;cursor:pointer}.btn.secondary{background:var(--accent2);color:var(--accent)}.calc-layout{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(300px,.9fr);gap:22px;align-items:start}.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}label{font-weight:700;font-size:.93rem}.hint{font-size:.82rem;color:var(--muted)}input,select{width:100%;padding:12px 13px;border:1px solid #c9ced3;border-radius:12px;background:white;color:var(--text);font:inherit}input:focus,select:focus,a:focus-visible{outline:3px solid rgba(31,111,95,.25);outline-offset:2px;border-color:var(--accent)}.results{display:grid;gap:10px}.result{display:flex;justify-content:space-between;gap:18px;padding:12px 0;border-bottom:1px solid var(--line)}.result:last-child{border:0}.result strong{font-variant-numeric:tabular-nums}.result.primary{background:var(--accent2);margin:4px -10px;padding:14px 10px;border-radius:12px;border:0}.note{padding:14px 16px;border-left:4px solid var(--accent);background:var(--accent2);border-radius:10px;margin:16px 0}.warning{border-left-color:var(--warn);background:#fff7e7}.content{max-width:820px}.content p,.content li{color:#34383c}.table-wrap{overflow:auto}.simple-table{border-collapse:collapse;width:100%;min-width:620px}.simple-table th,.simple-table td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left}.simple-table th{background:#f0f2f2}.kpi{font-size:1.8rem;font-weight:800}.small{font-size:.86rem;color:var(--muted)}footer{border-top:1px solid var(--line);padding:28px 20px;color:var(--muted);font-size:.9rem}.footer-inner{max-width:var(--max);margin:auto;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.pill{display:inline-block;border:1px solid var(--line);border-radius:999px;padding:4px 9px;font-size:.8rem;color:var(--muted);margin:2px}.error{color:#9f1b1b;font-weight:700}.ok{color:var(--accent);font-weight:700}@media(max-width:850px){.tool-card{grid-column:span 6}.calc-layout{grid-template-columns:1fr}.nav{align-items:flex-start;flex-direction:column;gap:8px}.nav-links{width:100%;overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}.nav-links a{white-space:nowrap}}@media(max-width:560px){.tool-card{grid-column:1/-1}.fields{grid-template-columns:1fr}.container{padding:24px 16px 54px}.panel,.card{padding:18px}.result{align-items:flex-start;flex-direction:column;gap:2px}.result strong{font-size:1.1rem}}