:root{
  --bg:#f6f7f9; --card:#ffffff; --ink:#17202b; --muted:#5b6b7c; --line:#dde3ea;
  --brand:#0b6e4f; --brand2:#095c42; --accent:#ffb020; --danger:#b3261e;
  --radius:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI",system-ui,-apple-system,Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--ink);line-height:1.65;font-size:16.5px}
a{color:var(--brand2);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1060px;margin:0 auto;padding:0 16px}
header.site{background:var(--brand2);color:#fff}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;gap:12px;flex-wrap:wrap}
.logo{font-weight:800;font-size:20px;color:#fff;letter-spacing:.2px}
.logo span{color:var(--accent)}
nav.main a{color:#e8f3ee;margin-left:16px;font-size:15px}
.hero{background:linear-gradient(135deg,#0b6e4f,#084c37);color:#fff;padding:36px 0 28px}
.hero h1{margin:0 0 10px;font-size:30px;line-height:1.3}
.hero p{margin:0;max-width:720px;color:#d9ece4}
main{padding:26px 0 40px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px;margin:18px 0}
.tool-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;display:block}
.tool-card:hover{border-color:var(--brand);text-decoration:none;box-shadow:0 4px 18px rgba(11,110,79,.10)}
.tool-card h3{margin:0 0 6px;font-size:17px;color:var(--ink)}
.tool-card p{margin:0;color:var(--muted);font-size:14.5px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:16px 0}
h1.page{font-size:27px;line-height:1.35;margin:8px 0 6px}
.lead{color:var(--muted);font-size:17px;margin:0 0 8px}
h2{font-size:21px;margin:26px 0 8px}
h3{font-size:17.5px;margin:18px 0 6px}
form.calc{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:12px;margin-top:8px}
.field label{display:block;font-weight:600;font-size:14.5px;margin-bottom:4px}
.field input,.field select{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:16px;background:#fff}
.field .hint{font-size:13px;color:var(--muted)}
.btn{grid-column:1/-1;background:var(--brand);color:#fff;border:0;border-radius:10px;padding:12px 18px;font-size:16.5px;font-weight:700;cursor:pointer}
.btn:hover{background:var(--brand2)}
.result{margin-top:16px;border-top:2px dashed var(--line);padding-top:14px;display:none}
.result.show{display:block}
table.kv{width:100%;border-collapse:collapse;margin:10px 0}
table.kv th,table.kv td{border:1px solid var(--line);padding:8px 10px;text-align:left;font-size:15px}
table.kv th{background:#eef5f1}
table.kv td.num,table.kv th.num{text-align:right;font-variant-numeric:tabular-nums}
.big{font-size:22px;font-weight:800;color:var(--brand2)}
.note{background:#fff8e6;border:1px solid #f0d98c;border-radius:10px;padding:12px 14px;font-size:15px}
.faq details{border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:8px 0;background:#fff}
.faq summary{font-weight:700;cursor:pointer}
.disclaimer{font-size:13.5px;color:var(--muted);border-top:1px solid var(--line);margin-top:26px;padding-top:12px}
footer.site{background:#10231c;color:#bcd3c8;margin-top:30px}
footer.site .wrap{padding:22px 16px;font-size:14.5px}
footer.site a{color:#e8f3ee}
.breadcrumb{font-size:14px;color:var(--muted);margin-top:14px}
.tag{display:inline-block;background:#e7f2ec;color:var(--brand2);border-radius:999px;padding:2px 10px;font-size:13px;font-weight:600;margin-bottom:8px}
.pos{color:var(--brand2);font-weight:700}.neg{color:var(--danger);font-weight:700}
@media (max-width:640px){.hero h1{font-size:24px}h1.page{font-size:23px}body{font-size:16px}}