:root{--bg:#fff;--ink:#111;--soft:#555;--line:#e6e6e6;--tint:#f6f6f4;--acc:#111;--on:#fff;--ok:#1d7a3a}
@media (prefers-color-scheme:dark){:root{--bg:#0f0f10;--ink:#f2f2f0;--soft:#a9a9a6;--line:#2a2a2c;--tint:#18181a;--acc:#d4ff3a;--on:#0f0f10;--ok:#6bd48a}}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:inherit}img{max-width:100%}
.top{position:sticky;top:0;z-index:5;background:var(--bg);border-bottom:1px solid var(--line)}
.top .in{max-width:1180px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 20px}
.logo{font-weight:900;letter-spacing:.14em;text-decoration:none;font-size:18px}
.logo small{font-weight:500;letter-spacing:.02em;color:var(--soft);margin-left:8px;font-size:13px}
.nav{display:flex;gap:18px;font-size:14px}.nav a{text-decoration:none;color:var(--soft)}.nav a:hover,.nav a[aria-current]{color:var(--ink)}
.btn{display:inline-block;background:var(--acc);color:var(--on);border:0;padding:12px 22px;font:600 14px/1 inherit;text-decoration:none;cursor:pointer;border-radius:2px}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink)}
.hero{max-width:1180px;margin:auto;padding:64px 20px 40px}
.hero h1{font-size:clamp(34px,6vw,64px);line-height:1.02;letter-spacing:-.03em;margin:0 0 14px;text-transform:uppercase}
.hero p{max-width:620px;color:var(--soft);font-size:18px;margin:0 0 24px}
.cta{display:flex;gap:10px;flex-wrap:wrap}
.wrap{max-width:1180px;margin:auto;padding:0 20px 80px;display:grid;grid-template-columns:240px 1fr;gap:48px}
.side{position:sticky;top:72px;align-self:start;max-height:calc(100vh - 90px);overflow:auto;font-size:14px;padding-top:8px}
.side p{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--soft);margin:18px 0 6px}
.side a{display:block;text-decoration:none;color:var(--soft);padding:4px 0}.side a:hover{color:var(--ink)}
main section{border-top:1px solid var(--line);padding:36px 0 8px}
main h2{font-size:28px;letter-spacing:-.01em;margin:0 0 12px}main h3{font-size:18px;margin:26px 0 8px}
main p,main li{color:var(--soft)}main b,main strong{color:var(--ink)}
code{background:var(--tint);padding:2px 6px;border-radius:3px;font-size:.9em;color:var(--ink)}
table{width:100%;border-collapse:collapse;font-size:14px;margin:12px 0;display:block;overflow-x:auto}
th,td{text-align:left;border-bottom:1px solid var(--line);padding:10px 12px 10px 0;vertical-align:top}th{color:var(--ink)}td{color:var(--soft)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:14px 0}
.card{border:1px solid var(--line);padding:18px}.card h4{margin:0 0 6px}.card p{margin:0;font-size:14px}
.sw{display:flex;gap:6px;margin-bottom:10px}.sw i{width:26px;height:26px;border-radius:50%;border:1px solid var(--line)}
.tip{background:var(--tint);border-left:3px solid var(--acc);padding:12px 16px;margin:14px 0;color:var(--ink)}
.foot{border-top:1px solid var(--line);padding:24px 20px;text-align:center;font-size:13px;color:var(--soft)}
form{display:grid;gap:14px;max-width:640px}
label{font-size:13px;font-weight:600;display:grid;gap:6px}
input,select,textarea{font:inherit;color:var(--ink);background:var(--bg);border:1px solid var(--line);padding:12px;border-radius:2px;width:100%}
input:focus,select:focus,textarea:focus,.btn:focus-visible,a:focus-visible{outline:2px solid var(--ink);outline-offset:2px}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.hp{position:absolute;left:-9999px}
.msg{padding:14px 16px;border:1px solid var(--ok);color:var(--ok)}.msg.err{border-color:#c0392b;color:#c0392b}
details{border-bottom:1px solid var(--line);padding:14px 0}summary{cursor:pointer;font-weight:600}details p{margin:10px 0 0}
@media (max-width:860px){.wrap{grid-template-columns:1fr}.side{display:none}.cards{grid-template-columns:1fr}.nav{gap:12px}.row2{grid-template-columns:1fr}.hero{padding:40px 16px 24px}.wrap{padding:0 16px 60px}.top .in{padding:12px 16px}}