:root{
  --green:#00732F;--green-dark:#005c26;--ink:#17212b;--muted:#5b6773;
  --bg:#f7f8f7;--card:#ffffff;--line:#e3e8e3;--accent:#c8102e;
  --radius:12px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:0 16px}
/* header */
header.site{background:var(--green);color:#fff}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:8px;padding-top:12px;padding-bottom:12px}
.logo{font-weight:700;font-size:1.15rem;color:#fff;display:flex;align-items:center;gap:8px}
.logo:hover{text-decoration:none}
.logo svg{flex:none}
nav.main{margin-left:auto}
nav.main ul{list-style:none;display:flex;flex-wrap:wrap;gap:4px}
nav.main a{color:#e8f3ec;padding:6px 10px;border-radius:8px;font-size:.95rem;display:block}
nav.main a:hover{background:rgba(255,255,255,.14);text-decoration:none}
nav.main a[aria-current="page"]{background:rgba(255,255,255,.2);font-weight:600}
/* hero */
.hero{background:linear-gradient(180deg,#eaf5ee,var(--bg));padding:36px 0 24px}
.hero h1{font-size:clamp(1.5rem,4vw,2.1rem);line-height:1.25;margin-bottom:10px}
.hero p{max-width:56ch;color:var(--muted);font-size:1.05rem}
/* cards */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin:24px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;
  box-shadow:0 1px 2px rgba(23,33,43,.05)}
.card h2,.card h3{font-size:1.15rem;margin-bottom:8px}
.card p{color:var(--muted);font-size:.96rem}
.card a.more{display:inline-block;margin-top:10px;font-weight:600}
/* tool */
.tool{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin:22px 0}
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;margin-bottom:6px;font-size:.95rem}
.field input,.field select{width:100%;padding:11px 12px;border:1.5px solid var(--line);border-radius:9px;
  font-size:1rem;background:#fff;color:var(--ink)}
.field input:focus,.field select:focus{outline:2px solid var(--green);outline-offset:-1px;border-color:var(--green)}
.field .hint{font-size:.82rem;color:var(--muted);margin-top:4px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:560px){.row2{grid-template-columns:1fr}}
.result{background:#eef7f1;border:1.5px solid #bfe3cd;border-radius:var(--radius);padding:18px;margin-top:8px}
.result .big{font-size:1.7rem;font-weight:750;color:var(--green-dark)}
.result table{width:100%;border-collapse:collapse;margin-top:10px;font-size:.95rem}
.result td{padding:6px 4px;border-bottom:1px solid #d5ecdd}
.result td:last-child{text-align:right;font-weight:600;white-space:nowrap}
.note{background:#fff8e6;border:1px solid #f0dfa0;border-radius:9px;padding:12px 14px;font-size:.9rem;margin:16px 0}
.disclaimer{font-size:.82rem;color:var(--muted);border-top:1px solid var(--line);margin-top:18px;padding-top:12px}
/* content */
main .wrap{padding-bottom:40px}
article h1{font-size:clamp(1.4rem,3.5vw,1.9rem);margin:26px 0 12px;line-height:1.3}
article h2{font-size:1.25rem;margin:26px 0 8px}
article h3{font-size:1.05rem;margin:18px 0 6px}
article p,article li{margin-bottom:10px;max-width:68ch}
article ul,article ol{padding-left:22px}
article table{width:100%;border-collapse:collapse;margin:14px 0;font-size:.93rem}
article th,article td{border:1px solid var(--line);padding:8px 10px;text-align:left}
article th{background:#eef7f1}
details.faq{border:1px solid var(--line);border-radius:9px;background:#fff;margin-bottom:10px;padding:2px 14px}
details.faq summary{font-weight:600;padding:10px 0;cursor:pointer}
details.faq p{padding-bottom:10px;color:var(--muted)}
/* ad slots (empty until AdSense) */
.ad-slot{min-height:0;margin:22px auto;text-align:center;font-size:.75rem;color:#9aa5af}
/* footer */
footer.site{background:#101820;color:#aeb9c4;margin-top:36px}
footer.site .wrap{padding-top:28px;padding-bottom:28px;display:flex;flex-wrap:wrap;gap:20px}
footer.site h4{color:#fff;font-size:.95rem;margin-bottom:8px}
footer.site ul{list-style:none}
footer.site a{color:#aeb9c4;font-size:.9rem}
footer.site a:hover{color:#fff}
footer .legal{width:100%;border-top:1px solid #26313c;margin-top:8px;padding-top:14px;font-size:.8rem;color:#77828d}
.breadcrumb{font-size:.85rem;color:var(--muted);margin:14px 0 0}
.breadcrumb a{color:var(--muted)}