:root{--navy:#0E1B2C;--orange:#FF5A1F;--orange-deep:#B83A0B;--muted:#475366;--border:#E1E6EE}
*{box-sizing:border-box}
body{margin:0;font-family:'Helvetica Neue',Helvetica,Arial,sans-serif;color:var(--navy);background:#fff;line-height:1.65;font-size:17px}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
header{background:var(--navy);color:#fff}
header .wrap{display:flex;justify-content:space-between;align-items:center;height:64px}
header a{color:#fff;text-decoration:none;font-weight:600}
.brand{font-weight:900;font-style:italic;letter-spacing:-.02em;font-size:20px}
main{padding:40px 20px 64px}
h1{font-size:40px;margin:0 0 4px;letter-spacing:-.02em}
h2{font-size:24px;margin:40px 0 10px}
h3{font-size:18px;margin:24px 0 8px}
.updated{color:var(--muted);margin:0 0 28px}
.toc{background:#F4F6F9;border-radius:12px;padding:12px 16px;margin-bottom:12px;font-size:15px}
a{color:var(--orange-deep)}
li{margin:6px 0}
section{scroll-margin-top:20px}
footer{border-top:1px solid var(--border);padding:24px 0;font-size:14px;color:var(--muted)}
footer a{color:var(--muted)}
:focus-visible{outline:3px solid var(--orange);outline-offset:2px}