:root{
    --paper:#F6F4EF;--paper-2:#FFFFFF;--ink:#17191C;--ink-soft:#4A4F55;--ink-faint:#7C828A;
    --brand:#0F3A45;--brand-2:#13525F;--line:#E3DFD6;--line-soft:#ECE8E0;--accent:#C9852E;--maxw:1080px;
  }
  a:hover{text-decoration:underline;}
  .topbar{background:var(--brand);color:#fff;border-bottom:3px solid var(--accent);}
  .topbar-inner{max-width:var(--maxw);margin:0 auto;padding:18px 24px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;}
  .wordmark{font-weight:800;letter-spacing:.18em;font-size:20px;color:#fff;display:flex;align-items:center;gap:.5em;}
  .wordmark .dot{width:9px;height:9px;border-radius:50%;background:var(--accent);display:inline-block;}
  .topnav{display:flex;gap:6px;flex-wrap:wrap;font-size:13.5px;}
  .topnav a{color:rgba(255,255,255,.82);padding:6px 12px;border-radius:999px;border:1px solid transparent;}
  .topnav a:hover{color:#fff;text-decoration:none;border-color:rgba(255,255,255,.35);}
  .topnav a.active{color:var(--brand);background:#fff;font-weight:600;}
  .doc-head{max-width:var(--maxw);margin:0 auto;padding:90px 24px 30px;}
  .eyebrow{font-family:ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;font-size:12px;letter-spacing:.3em;color:var(--accent);text-transform:uppercase;margin:0 0 14px;}
  .doc-head h1{font-size:clamp(34px,5.5vw,52px);line-height:1.12;margin:0 0 18px;font-weight:800;letter-spacing:.01em;}
  .meta{display:flex;gap:28px;flex-wrap:wrap;font-size:13.5px;color:var(--ink-faint);padding-top:16px;border-top:1px solid var(--line);}
  .meta b{color:var(--ink-soft);font-weight:600;}
  .layout{max-width:var(--maxw);margin:0 auto;padding:10px 24px 90px;display:grid;grid-template-columns:240px 1fr;gap:54px;align-items:start;}
  .toc{position:sticky;top:90px;font-size:13.5px;border-left:2px solid var(--line);padding-left:18px;}
  .toc-title{font-family:ui-monospace,Menlo,monospace;font-size:11px;letter-spacing:.25em;text-transform:uppercase;color:var(--ink-faint);margin:0 0 14px;}
  .toc ol{list-style:none;margin:0;padding:0;counter-reset:t;}
  .toc li{counter-increment:t;margin:0 0 9px;}
  .toc a{color:var(--ink-soft);display:block;line-height:1.5;}
  .toc a:hover{color:var(--brand-2);text-decoration:none;}
  .toc a::before{content:counter(t,decimal-leading-zero);font-family:ui-monospace,Menlo,monospace;font-size:11px;color:var(--accent);margin-right:8px;}
  .content{min-width:0;}
  section{margin:0 0 52px;scroll-margin-top:90px;}
  section h2{font-size:23px;font-weight:700;margin:0 0 16px;padding-bottom:10px;border-bottom:1px solid var(--line);display:flex;align-items:baseline;gap:12px;}
  section h2 .n{font-family:ui-monospace,Menlo,monospace;font-size:14px;color:var(--accent);font-weight:600;}
  section h3{font-size:16.5px;font-weight:700;margin:26px 0 8px;color:var(--brand-2);}
  p{margin:0 0 14px;color:var(--ink);}
  .lead{font-size:17px;color:var(--ink-soft);}
  ul,ol.list{margin:0 0 16px;padding-left:22px;}
  li{margin:0 0 8px;}
  strong{font-weight:700;}
  .note{background:var(--paper-2);border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:0 8px 8px 0;padding:16px 20px;margin:18px 0;font-size:14.5px;color:var(--ink-soft);}
  .note b{color:var(--ink);}
  .ph{background:#FBEFD8;color:#8a5a11;padding:1px 7px;border-radius:5px;font-size:13.5px;border:1px dashed #d9b15f;white-space:normal;overflow-wrap:break-word;word-break:break-word;}

  @media(max-width:820px){
    .layout{grid-template-columns:1fr;gap:0;}
    .toc{position:static;border-left:none;border-top:1px solid var(--line);padding:22px 0 4px;margin-bottom:30px;}
    .toc ol{columns:2;column-gap:24px;}
    .doc-head{padding-top:44px;}
  }
  @media(max-width:480px){.toc ol{columns:1;}}