:root { --ink:#1c2420; --muted:#5d6b63; --accent:#1d6f4e; --bg:#f7faf8; --card:#fff; --line:#e3ebe6; --warn:#8a5a00; --warnbg:#fdf3e0; }
* { box-sizing:border-box; }
body { font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif; color:var(--ink); background:var(--bg); margin:0; line-height:1.6; }
.wrap { max-width:720px; margin:0 auto; padding:0 16px 64px; }
header.site { background:var(--accent); color:#fff; padding:28px 16px; }
header.site .wrap { padding-bottom:0; }
header.site h1 { margin:0 0 6px; font-size:1.6rem; }
header.site p { margin:0; opacity:.92; }
nav.top { background:#eef4f0; border-bottom:1px solid var(--line); }
nav.top .wrap { display:flex; gap:18px; padding-top:10px; padding-bottom:10px; flex-wrap:wrap; }
nav.top a { color:var(--accent); text-decoration:none; font-weight:600; font-size:.95rem; }
h1 { font-size:1.7rem; line-height:1.25; }
h2 { font-size:1.25rem; margin-top:2em; }
.card { background:var(--card); border:1px solid var(--line); border-radius:12px; padding:20px; margin:20px 0; }
label { display:block; font-weight:600; margin:14px 0 4px; }
select, input[type=number], input[type=text] { width:100%; padding:10px 12px; font-size:1rem; border:1px solid #c9d4cd; border-radius:8px; background:#fff; }
button { background:var(--accent); color:#fff; border:0; border-radius:8px; padding:12px 22px; font-size:1.05rem; font-weight:700; margin-top:18px; cursor:pointer; }
button:hover { filter:brightness(1.08); }
.result { background:#f0f7f3; border:1px solid #bcd8c8; border-radius:12px; padding:20px; margin:20px 0; }
.result .big { font-size:1.9rem; font-weight:800; color:var(--accent); }
table { width:100%; border-collapse:collapse; margin:12px 0; font-size:.95rem; }
th, td { text-align:left; padding:8px 6px; border-bottom:1px solid var(--line); }
th { color:var(--muted); font-weight:600; }
td.num, th.num { text-align:right; font-variant-numeric:tabular-nums; }
.warning { background:var(--warnbg); border:1px solid #e8cf9a; border-radius:10px; padding:14px 16px; margin:20px 0; color:var(--warn); }
.formula { font-size:.85rem; color:var(--muted); background:#f3f6f4; border-radius:8px; padding:10px 12px; margin-top:14px; }
footer.site { border-top:1px solid var(--line); margin-top:48px; padding:20px 16px 40px; color:var(--muted); font-size:.85rem; }
.faq details { border:1px solid var(--line); border-radius:8px; margin:8px 0; background:#fff; }
.faq summary { padding:12px 14px; cursor:pointer; font-weight:600; }
.faq details p { padding:0 14px 12px; margin:0; }
.affil { border:1px dashed #c9d4cd; border-radius:10px; padding:16px; margin:24px 0; }
.affil small { color:var(--muted); }
.disclosure { font-size:.8rem; color:var(--muted); }