:root{
  --ink:#1a2420; --muted:#667069; --accent:#0d9488; --accent2:#b45309;
  --bg:#ffffff; --panel:#f7f9f8; --line:#e3e8e5;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

nav{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);z-index:50}
nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{font-family:'Source Serif 4',serif;font-weight:700;font-size:21px;letter-spacing:-.01em;display:flex;align-items:baseline;gap:6px}
.brand span{color:var(--accent)}
.brand small{font-family:'Inter',sans-serif;font-weight:600;font-size:11px;letter-spacing:.14em;color:var(--muted);margin-left:2px}
nav ul{list-style:none;display:flex;gap:30px;margin:0;padding:0}
nav ul a{font-weight:500;font-size:14.5px;color:var(--ink);opacity:.8;transition:opacity .15s}
nav ul a:hover,nav ul a.on{opacity:1;color:var(--accent)}
#navtoggle,.burger{display:none}

@media (max-width:820px){
  nav ul{position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;gap:0;
    padding:8px 24px 20px;border-bottom:1px solid var(--line);transform:translateY(-140%);
    transition:transform .22s ease;opacity:0}
  nav ul li{padding:12px 0;border-bottom:1px solid var(--line)}
  #navtoggle:checked ~ ul{transform:translateY(0);opacity:1}
  .burger{display:flex;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
  .burger span{width:22px;height:2px;background:var(--ink);border-radius:2px}
}

.hero{padding:56px 0 44px;border-bottom:1px solid var(--line)}
.hero .tag{color:var(--accent);font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.hero h1{font-family:'Source Serif 4',serif;font-size:44px;line-height:1.16;letter-spacing:-.01em;margin:14px 0 16px;max-width:760px}
.hero p.lead{font-size:18px;color:var(--muted);max-width:600px;margin:0 0 24px}
@media (max-width:640px){.hero h1{font-size:30px}}

.section{padding:48px 0}
.section h2.head{font-size:13px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);
  border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:28px}

.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
@media (max-width:900px){.grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.grid{grid-template-columns:1fr}}

.card{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.06)}
.card .thumb{aspect-ratio:16/10;background:linear-gradient(135deg,var(--accent),#2dd4bf);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:13px;letter-spacing:.06em;text-transform:uppercase;opacity:.92}
.card .body{padding:18px 20px 22px}
.card .cat{color:var(--accent);font-weight:700;font-size:11.5px;letter-spacing:.08em;text-transform:uppercase}
.card h3{font-family:'Source Serif 4',serif;font-size:19px;line-height:1.35;margin:10px 0 8px}
.card p{color:var(--muted);font-size:14.5px;margin:0}

.article-hero{padding:44px 0 8px}
.article-hero .cat{color:var(--accent);font-weight:700;font-size:12.5px;letter-spacing:.08em;text-transform:uppercase}
.article-hero h1{font-family:'Source Serif 4',serif;font-size:36px;line-height:1.22;margin:14px 0 12px;max-width:800px}
.meta{color:var(--muted);font-size:14px}
.article-body{max-width:720px;margin:0 auto;padding:32px 24px 64px}
.article-body p{font-size:17.5px;margin:0 0 20px}
.article-body h2{font-family:'Source Serif 4',serif;font-size:26px;margin:38px 0 14px;letter-spacing:-.01em}
.article-body h3{font-family:'Source Serif 4',serif;font-size:20px;margin:28px 0 12px}
.article-body ul,.article-body ol{font-size:17.5px;padding-left:22px;margin:0 0 20px}
.article-body li{margin-bottom:8px}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body th{background:var(--panel);font-weight:700}
.tldr{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:6px;padding:18px 22px;margin:0 0 28px}
.tldr li{margin-bottom:6px}

.simple h1{font-family:'Source Serif 4',serif;font-size:34px;margin-bottom:6px}
.simple .lead{color:var(--muted);font-size:17px;max-width:620px}
.simple .body{max-width:720px;font-size:17px}
.simple .body p{margin:0 0 18px}

form.contact{max-width:520px;display:flex;flex-direction:column;gap:14px}
form.contact input,form.contact textarea{font:inherit;padding:12px 14px;border:1px solid var(--line);border-radius:8px}
form.contact button{background:var(--ink);color:#fff;border:0;border-radius:8px;padding:13px 18px;font-weight:600;cursor:pointer;width:fit-content}

footer{border-top:1px solid var(--line);background:var(--panel);padding:52px 0 0;margin-top:40px}
footer .wrap{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:32px}
footer h4{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 12px}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin-bottom:9px;font-size:14.5px}
footer .wrap:last-child{grid-template-columns:1fr;color:var(--muted);font-size:13px;padding-bottom:22px}
@media (max-width:640px){footer .wrap{grid-template-columns:1fr}}