:root{--ink:#0b1430;--navy:#16255a;--gold:#c9a13e;--text:#1b2333;--muted:#616c81;
  --line:#e7e9ef;--maxw:820px;
  --serif:'Instrument Serif','Iowan Old Style',Georgia,'Times New Roman',serif;
  --font:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
*{box-sizing:border-box}
body{margin:0;font-family:var(--font);color:var(--text);background:#fff;font-size:17px;line-height:1.68;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:var(--navy)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.nav{border-bottom:1px solid var(--line);position:sticky;top:0;background:rgba(255,255,255,.94);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);z-index:10}
.nav-inner{max-width:1160px;margin:0 auto;padding:11px 24px;display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none}
.brand img{height:38px;width:auto}
.nav .back{margin-left:auto;font-size:14.5px;font-weight:700;color:var(--ink);text-decoration:none;
  padding:8px 12px;border-radius:8px}
.nav .back:hover{background:rgba(16,28,61,.05)}
header.page{padding:clamp(48px,7vw,84px) 0 clamp(24px,3vw,36px)}
h1{font-family:var(--serif);font-weight:400;font-size:clamp(36px,5vw,58px);letter-spacing:-.018em;color:var(--ink);margin:0;line-height:1.08}
.updated{color:var(--muted);font-size:14.5px;margin:16px 0 0}
main{padding-bottom:clamp(56px,7vw,90px)}
h2{font-size:21px;font-weight:700;letter-spacing:-.018em;color:var(--ink);margin:44px 0 12px;line-height:1.3}
h3{font-size:17px;color:var(--ink);margin:26px 0 8px}
p,li{color:#3d4657}
p{margin:0 0 14px}
ul,ol{margin:0 0 16px;padding-left:22px}
li{margin:6px 0}
.toc{border:1px solid var(--line);border-radius:12px;padding:20px 24px;background:#f7f8fb;margin:34px 0 0}
.toc h2{margin:0 0 10px;font-size:13px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}
.toc ol{margin:0;padding-left:20px;columns:2;column-gap:32px}
.toc a{color:#3d4657;text-decoration:none;font-size:15px}
.toc a:hover{color:var(--navy);text-decoration:underline}
@media (max-width:600px){.toc ol{columns:1}}
.callout{border:1px solid #eadcb8;border-left:3px solid var(--gold);background:#fdf7ea;
  border-radius:10px;padding:16px 20px;margin:32px 0;font-size:15.5px;color:#5c4a1c}
.callout b{color:#4a3b14}
.callout p{color:inherit;margin:0}
.callout p + p{margin-top:10px}
mark{background:#fff2cc;color:#5c4a1c;padding:1px 5px;border-radius:4px;font-weight:700}
footer{border-top:1px solid var(--line);padding:28px 0 44px;font-size:14px;color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;gap:8px 22px;justify-content:space-between}
footer a{color:var(--muted)}
:focus-visible{outline:2.5px solid var(--gold);outline-offset:3px;border-radius:6px}