:root{
  --ink:#0E1922;--steel:#5A6B7B;--steel-2:#8A99A8;--line:#E2E8EE;--mist:#F2F5F8;
  --paper:#fff;--orange:#F6631C;--orange-deep:#C13F06;--orange-tint:#FFF1E9;
  --sans:-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text",Inter,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--paper);-webkit-font-smoothing:antialiased;font-size:17px;line-height:1.65}
a{color:var(--orange-deep)}
::selection{background:var(--orange);color:#fff}
:focus-visible{outline:3px solid var(--orange);outline-offset:3px;border-radius:6px}

.topbar{border-bottom:1px solid var(--line);background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(16px);position:sticky;top:0;z-index:10}
.topbar .inner{max-width:1180px;margin:0 auto;padding:.85rem 1.25rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand span{font-weight:700;font-size:1.2rem;letter-spacing:-.035em;color:var(--ink)}
.back{font-size:.95rem;font-weight:600;text-decoration:none;color:var(--ink);border:1.5px solid var(--line);border-radius:999px;padding:.45rem 1.1rem;transition:border-color .2s,background .2s}
.back:hover{border-color:var(--ink);background:var(--mist)}

.head{max-width:1180px;margin:0 auto;padding:3.5rem 1.25rem 0}
.eyebrow{color:var(--orange-deep);font-weight:600;font-size:1rem;margin:0 0 .4rem}
h1{font-size:clamp(2.1rem,4vw,3rem);font-weight:800;letter-spacing:-.03em;line-height:1.08;margin:0 0 .6rem}
.updated{color:var(--steel-2);font-size:.95rem;margin:0}

main{max-width:1180px;margin:0 auto;padding:2.5rem 1.25rem 4rem;display:grid;grid-template-columns:240px 1fr;gap:3.5rem;align-items:start}
.toc{position:sticky;top:86px;font-size:.93rem}
.toc p{font-weight:700;font-size:.78rem;letter-spacing:.07em;text-transform:uppercase;color:var(--steel-2);margin:0 0 .7rem}
.toc ol{list-style:none;margin:0;padding:0;counter-reset:t}
.toc li{margin-bottom:.45rem}
.toc a{color:var(--steel);text-decoration:none}
.toc a:hover{color:var(--orange-deep)}

article{max-width:72ch}
article h2{font-size:1.28rem;font-weight:700;letter-spacing:-.02em;margin:2.6rem 0 .7rem;scroll-margin-top:92px}
article h2:first-child{margin-top:0}
article h3{font-size:1.02rem;font-weight:700;margin:1.5rem 0 .4rem}
article p,article li{color:#2E3C49}
article p{margin:0 0 1rem}
article ul{margin:0 0 1rem;padding-left:1.2rem}
article li{margin-bottom:.45rem}
article strong{font-weight:600;color:var(--ink)}
.callout{background:var(--mist);border:1px solid var(--line);border-left:3px solid var(--orange);border-radius:12px;padding:1.1rem 1.25rem;margin:0 0 1.6rem}
.callout p{margin:0}
.contact-box{border:1px solid var(--line);border-radius:14px;padding:1.25rem 1.4rem;margin-top:1.2rem;background:var(--mist)}
.contact-box p{margin:0 0 .25rem}

footer{border-top:1px solid var(--line);background:var(--mist)}
footer .inner{max-width:1180px;margin:0 auto;padding:2rem 1.25rem;display:flex;flex-wrap:wrap;gap:1rem 2rem;justify-content:space-between;font-size:.9rem;color:var(--steel)}
footer a{color:var(--steel);text-decoration:none;margin-right:1.3rem}
footer a:hover{color:var(--orange-deep)}

@media (max-width:860px){
  main{grid-template-columns:1fr;gap:2rem;padding-top:2rem}
  .toc{position:static;border-bottom:1px solid var(--line);padding-bottom:1.25rem}
  body{font-size:16px}
}