:root{
  --bg:#f6f8fb;
  --card:#ffffff;
  --border:#e2e8f0;
  --border2:#cbd5e1;
  --text:#0f172a;
  --muted:#64748b;
  --brand:#0d9488;
  --brand2:#0f766e;
  --brand-soft:#ccfbf1;
  --accent:#0ea5e9;
  --ok:#16a34a;
  --shadow:0 1px 2px rgba(15,23,42,.06),0 8px 24px rgba(15,23,42,.06);
  --radius:14px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand2);text-decoration:none}
a:hover{text-decoration:underline}

/* HEADER */
.site-header{
  background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:50;
}
.header-inner{
  max-width:1080px;margin:0 auto;padding:0 20px;height:62px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--text)}
.brand:hover{text-decoration:none}
.brand-badge{
  width:30px;height:30px;border-radius:8px;background:var(--brand);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:800;
}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{
  color:var(--muted);font-size:14px;font-weight:600;padding:7px 12px;border-radius:8px;
}
.nav a:hover{background:var(--bg);color:var(--text);text-decoration:none}
.nav a.active{color:var(--brand2);background:var(--brand-soft)}

/* LAYOUT */
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.hero{text-align:center;padding:56px 20px 24px;max-width:820px;margin:0 auto}
.hero h1{font-size:38px;line-height:1.15;letter-spacing:-.02em;margin-bottom:14px}
.hero p{color:var(--muted);font-size:17px}
.section{padding:32px 0}
.section h2{font-size:26px;letter-spacing:-.01em;margin-bottom:14px}
.section h3{font-size:19px;margin:22px 0 8px}
.section p{color:#334155;margin-bottom:12px}
.section ul{margin:0 0 14px 22px;color:#334155}
.section li{margin-bottom:6px}

/* CALC GRID */
.calc-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px;margin-top:8px;
}
.calc-card{
  display:block;background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:20px;box-shadow:var(--shadow);transition:transform .12s,box-shadow .12s;
}
.calc-card:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(15,23,42,.10);text-decoration:none}
.calc-card .ico{font-size:24px}
.calc-card h3{font-size:17px;margin:10px 0 4px;color:var(--text)}
.calc-card p{color:var(--muted);font-size:14px;margin:0}

/* TOOL */
.tool{
  display:grid;grid-template-columns:1fr 1fr;gap:22px;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);margin-top:8px;
}
@media(max-width:760px){.tool{grid-template-columns:1fr}}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px;color:#334155}
.field input,.field select{
  width:100%;padding:11px 12px;border:1px solid var(--border2);border-radius:9px;
  font-size:15px;font-family:inherit;background:#fff;color:var(--text);outline:none;
}
.field input:focus,.field select:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.hint{font-size:12px;color:var(--muted);margin-top:4px}
.btn{
  width:100%;padding:13px;border:0;border-radius:10px;background:var(--brand);color:#fff;
  font-size:16px;font-weight:700;cursor:pointer;font-family:inherit;transition:background .12s;
}
.btn:hover{background:var(--brand2)}
.results{
  background:#f8fafc;border:1px solid var(--border);border-radius:12px;padding:18px;
}
.result-big{text-align:center;padding:8px 0 16px;border-bottom:1px dashed var(--border2);margin-bottom:14px}
.result-big .label{font-size:13px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.result-big .value{font-size:34px;font-weight:800;color:var(--brand2);letter-spacing:-.02em}
.result-row{display:flex;justify-content:space-between;padding:7px 0;font-size:15px;border-bottom:1px solid #eef2f7}
.result-row:last-child{border-bottom:0}
.result-row span:first-child{color:var(--muted)}
.result-row span:last-child{font-weight:700}

/* AD SLOTS */
.ad-slot{
  margin:22px 0;padding:16px;border:1px dashed var(--border2);border-radius:12px;
  text-align:center;color:#94a3b8;font-size:12px;letter-spacing:.08em;text-transform:uppercase;
  background:#fbfcfe;min-height:90px;display:flex;align-items:center;justify-content:center;
}
.ad-slot::before{content:"ADVERTISEMENT"}

/* FAQ */
.faq details{
  background:#fff;border:1px solid var(--border);border-radius:12px;padding:14px 18px;margin-bottom:10px;
}
.faq summary{font-weight:700;cursor:pointer;font-size:16px}
.faq details p{margin-top:10px;color:#334155}

/* FOOTER */
.site-footer{
  margin-top:48px;border-top:1px solid var(--border);background:#fff;padding:28px 0;
}
.footer-inner{max-width:1080px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.footer-links{display:flex;gap:16px;flex-wrap:wrap}
.footer-links a{color:var(--muted);font-size:14px}
.footer-copy{color:#94a3b8;font-size:13px}

/* MISC */
.breadcrumb{font-size:13px;color:var(--muted);padding-top:18px}
.breadcrumb a{color:var(--muted)}
.note{
  background:#fffbeb;border:1px solid #fde68a;border-radius:10px;padding:12px 14px;
  font-size:13px;color:#92400e;margin-top:14px;
}
.pill{display:inline-block;background:var(--brand-soft);color:var(--brand2);font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px;margin-bottom:10px}
table.rates{width:100%;border-collapse:collapse;margin:10px 0 18px;font-size:14px}
table.rates th,table.rates td{border:1px solid var(--border);padding:9px 12px;text-align:left}
table.rates th{background:#f1f5f9}