:root{
  --bg:#ffffff; --card:#f6f8fa; --text:#182322; --muted:#52635e;
  --accent:#087f4f; --line:#dce5e0; --link:#086c9e;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);background:#ffffff;position:sticky;top:0;z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 20px;max-width:1100px;margin:0 auto}
.brand{font-weight:800;font-size:1.15rem;letter-spacing:.3px}
.brand span{color:var(--accent)}
nav.links a{margin-left:18px;color:var(--muted);font-weight:600;font-size:.95rem}
nav.links a:hover{color:var(--text);text-decoration:none}
.disclaimer{background:#f0f5f2;border-bottom:1px solid var(--line);color:var(--muted);font-size:.82rem;text-align:center;padding:8px 16px}
.disclaimer b{color:var(--text)}
.hero{padding:56px 0 32px}
.tag{display:inline-block;background:rgba(59,208,122,.12);color:var(--accent);font-weight:700;font-size:.75rem;letter-spacing:1px;text-transform:uppercase;padding:5px 12px;border-radius:999px;margin-bottom:18px}
h1{font-size:2.4rem;line-height:1.2;margin:0 0 16px;font-weight:800}
.lede{font-size:1.18rem;color:var(--muted);margin:0 0 24px}
.meta{color:var(--muted);font-size:.85rem;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0;margin-bottom:8px}
article h2{font-size:1.6rem;margin:44px 0 14px;font-weight:800;line-height:1.3}
article h3{font-size:1.2rem;margin:30px 0 10px;font-weight:700}
article p{margin:0 0 18px}
article ul,article ol{margin:0 0 20px;padding-left:22px}
article li{margin:0 0 8px}
.callout{background:var(--card);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:10px;padding:18px 20px;margin:28px 0}
.callout.warn{border-left-color:#f2b544}
.callout h4{margin:0 0 8px;font-size:1rem}
.cta{display:inline-block;background:var(--accent);color:#ffffff;font-weight:800;padding:14px 26px;border-radius:10px;margin:8px 0;font-size:1.02rem}
.cta:hover{text-decoration:none;filter:brightness(1.05)}
.toc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px 24px;margin:28px 0}
.toc strong{display:block;margin-bottom:10px;font-size:.9rem;letter-spacing:.5px;text-transform:uppercase;color:var(--muted)}
.toc ol{margin:0;padding-left:20px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0}
.pcard{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.pcard h4{margin:0 0 6px}
.pcard p{margin:0;color:var(--muted);font-size:.92rem}
table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.95rem}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:700;font-size:.82rem;text-transform:uppercase;letter-spacing:.5px}
.faq{margin:16px 0}
.faq details{border:1px solid var(--line);border-radius:10px;padding:4px 16px;margin-bottom:10px;background:var(--card)}
.faq summary{cursor:pointer;font-weight:700;padding:12px 0}
.faq p{margin:0 0 14px;color:var(--muted)}
footer.site{border-top:1px solid var(--line);margin-top:60px;padding:34px 0;color:var(--muted);font-size:.87rem}
footer .wrap p{margin:0 0 10px}
@media(max-width:640px){h1{font-size:1.9rem}.grid{grid-template-columns:1fr}nav.links a{margin-left:12px}}
/* Светлая тема и адаптация узких экранов. */
:root{color-scheme:light}
.nav{flex-wrap:wrap}
nav.links{display:flex;flex-wrap:wrap;gap:10px 18px}
nav.links a{margin-left:0}
h1{overflow-wrap:anywhere}
a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}
@media(max-width:640px){.nav{align-items:flex-start}nav.links a{margin-left:0}th,td{padding:8px 6px;font-size:.85rem}.official{padding:20px}}