*{box-sizing:border-box;margin:0;padding:0}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:#fff;color:#1f2328;line-height:1.65}
header{display:flex;justify-content:space-between;align-items:center;padding:16px 5vw;border-bottom:1px solid #d8dee4;background:#f6f8fa}
header strong{font-size:17px}
nav a{color:#57606a;text-decoration:none;margin-left:20px;font-size:14px}
main{padding:48px 5vw;max-width:860px}
h1{font-size:34px;margin-bottom:16px}
h2{font-size:22px;margin:28px 0 8px;padding-bottom:6px;border-bottom:1px solid #d8dee4}
p{font-size:16px;margin-bottom:14px;color:#33393f}
pre{background:#f6f8fa;border:1px solid #d8dee4;border-radius:6px;padding:14px;font-size:13px;overflow:auto;margin:14px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-top:20px}
.card{border:1px solid #d8dee4;border-radius:8px;padding:16px}
.card h3{font-size:16px;margin-bottom:4px}
.card p{font-size:14px;margin:0}
footer{padding:24px 5vw;border-top:1px solid #d8dee4;color:#57606a;font-size:13px}
a.card,a.tile{color:inherit;text-decoration:none;display:block}
a.card:hover,a.tile:hover{filter:brightness(1.12)}
footer .fl{margin-bottom:10px}
footer .fl a{color:inherit;text-decoration:none;margin-right:18px;opacity:.85}
footer .fl a:hover{text-decoration:underline}
footer .lg{font-size:12px;opacity:.75;line-height:1.6}
.form{display:grid;gap:14px;max-width:520px;margin-top:20px}
.form label{display:grid;gap:6px;font-size:14px}
.form input,.form textarea{font:inherit;padding:10px 12px;border:1px solid #8884;border-radius:8px;background:#8881;color:inherit}
.form button{font:inherit;padding:11px 22px;border:0;border-radius:8px;background:#4f8cff;color:#fff;cursor:pointer;justify-self:start}
.form button:hover{filter:brightness(1.1)}
.ok{margin-top:6px;color:#2fa36b}
details{max-width:640px;border:1px solid #8883;border-radius:8px;padding:12px 16px;margin:10px 0}
details summary{cursor:pointer;font-weight:600}
.ck{position:fixed;left:16px;right:16px;bottom:16px;max-width:560px;margin:0 auto;background:#1c1f26;color:#fff;padding:14px 18px;border-radius:12px;display:flex;gap:16px;align-items:center;justify-content:space-between;font:14px system-ui,sans-serif;box-shadow:0 8px 30px #0006;z-index:9}
.ck button{font:inherit;padding:8px 16px;border:0;border-radius:8px;background:#4f8cff;color:#fff;cursor:pointer}