:root{
  --bg:#f6f8fb;--card:#fff;--text:#1f2937;--muted:#667085;--brand:#0f766e;
  --brand2:#115e59;--line:#e5e7eb;--accent:#ecfdf5;
}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:inherit}
.container{width:min(1120px,calc(100% - 32px));margin:auto}
header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.nav{display:flex;justify-content:space-between;align-items:center;min-height:68px;gap:20px}
.logo{font-weight:800;text-decoration:none;font-size:20px}.logo span{color:var(--brand)}
nav a{margin-left:16px;text-decoration:none;color:#475467;font-weight:600;font-size:14px}
.hero{padding:64px 0 34px}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:30px;align-items:center}
.badge{display:inline-block;background:var(--accent);color:var(--brand2);font-weight:700;border-radius:999px;padding:6px 10px;font-size:13px}
h1{font-size:clamp(38px,6vw,64px);line-height:1.05;margin:16px 0 18px;letter-spacing:-.03em}
h2{font-size:30px;line-height:1.2;margin-top:0}
.lead{font-size:19px;color:var(--muted);max-width:720px}
.hero-card,.card,.calc{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:0 10px 30px rgba(15,23,42,.05)}
.hero-card{padding:26px}
.hero-card ul{padding-left:20px;margin-bottom:0}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{padding:22px;text-decoration:none;transition:.18s transform,.18s box-shadow}
.card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(15,23,42,.09)}
.card h3{margin:0 0 8px}.card p{margin:0;color:var(--muted)}
section{padding:36px 0}
.calc-wrap{display:grid;grid-template-columns:1fr .85fr;gap:26px;align-items:start}
.calc{padding:26px}
label{display:block;font-weight:700;margin:14px 0 6px}
input,select{width:100%;padding:13px 14px;border:1px solid #cfd4dc;border-radius:12px;font:inherit;background:#fff}
button{margin-top:18px;border:0;background:var(--brand);color:#fff;border-radius:12px;padding:13px 18px;font-weight:800;font-size:16px;cursor:pointer}
button:hover{background:var(--brand2)}
.result{margin-top:18px;background:var(--accent);border:1px solid #a7f3d0;border-radius:14px;padding:16px;min-height:58px}
.content{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.content p,.content li{color:#475467}
.kpi{font-size:34px;font-weight:850;color:var(--brand2)}
.small{font-size:13px;color:var(--muted)}
footer{padding:34px 0;color:#667085;font-size:14px}
.breadcrumbs{font-size:13px;color:#667085;margin-top:18px}
.breadcrumbs a{text-decoration:none}
.faq details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin:10px 0}
.faq summary{font-weight:700;cursor:pointer}
@media(max-width:820px){
  .hero-grid,.calc-wrap,.grid{grid-template-columns:1fr}
  nav{display:none}
  .hero{padding-top:38px}
}