:root{
  --brand:#005D4D; --brand-2:#0a7c67; --ink:#0f1c1a; --muted:#5b6b68;
  --bg:#f6faf9; --card:#ffffff; --line:#e4efec; --accent:#ffb703;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
.wide{max-width:1140px}

/* Header */
header{position:sticky;top:0;z-index:50;background:rgba(246,250,249,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:1140px;margin:0 auto;padding:0 20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--brand)}
.logo:hover{text-decoration:none}
.logo .dot{width:28px;height:28px;border-radius:8px;background:var(--brand);display:grid;place-items:center;color:#fff;font-size:15px}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-links a{color:var(--muted);font-weight:500}
.nav-links a:hover{color:var(--ink);text-decoration:none}
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;border-radius:10px;padding:10px 18px;cursor:pointer;border:0;font-size:15px;background:var(--brand);color:#fff!important}
.btn:hover{text-decoration:none;background:var(--brand-2)}
@media(max-width:680px){.nav-links .link{display:none}}

/* Breadcrumb */
.crumb{font-size:13px;color:var(--muted);margin:22px 0 6px}
.crumb a{color:var(--muted)}

/* Article */
article{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:34px;margin:10px 0 40px}
article h1{font-size:clamp(26px,4vw,38px);line-height:1.2;letter-spacing:-.02em;margin-bottom:10px}
article .meta{color:var(--muted);font-size:14px;margin-bottom:22px}
article h2{font-size:23px;margin:30px 0 10px;letter-spacing:-.01em}
article h3{font-size:18px;margin:22px 0 8px}
article p{margin:12px 0}
article ul,article ol{margin:12px 0 12px 22px}
article li{margin:7px 0}
article .lead{font-size:18px;color:#223}
.tag{display:inline-block;background:#e6f4f1;color:var(--brand);font-weight:600;font-size:12px;padding:5px 11px;border-radius:999px;margin-bottom:14px}
.callout{background:#e6f4f1;border:1px solid #cfe8e2;border-radius:12px;padding:16px 18px;margin:22px 0}
.cta{background:linear-gradient(160deg,var(--brand),var(--brand-2));color:#fff;border-radius:16px;padding:26px;margin:30px 0;text-align:center}
.cta h3{color:#fff;margin:0 0 6px}
.cta p{color:#dff1ec;margin:0 0 16px}
.cta .btn{background:#fff;color:var(--brand)!important}
details{border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:10px 0;background:#fff}
details summary{font-weight:600;cursor:pointer}
details p{margin:10px 0 0;color:var(--muted)}

/* Blog index cards */
.hero-blog{padding:40px 0 8px}
.hero-blog h1{font-size:clamp(28px,5vw,42px);letter-spacing:-.02em}
.hero-blog p{color:var(--muted);font-size:18px;margin-top:8px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:18px;margin:24px 0 50px}
.pcard{display:block;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;transition:transform .12s ease,box-shadow .12s ease}
.pcard:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,93,77,.10);text-decoration:none}
.pcard .tag{margin-bottom:12px}
.pcard h2{font-size:19px;color:var(--ink);margin:0 0 8px;line-height:1.3}
.pcard p{color:var(--muted);font-size:14px;margin:0}

/* Footer */
footer{border-top:1px solid var(--line);background:#fff}
.foot{max-width:1140px;margin:0 auto;padding:26px 20px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;color:var(--muted);font-size:14px}
.foot a{color:var(--muted)}