:root{
    --ink:#17181C; --ink-2:#1E1F24;
    --gold:#C29B57; --gold-lift:#D2AE68; --gold-soft:#E7D3A6;
    --bone:#F6F4EF; --sable:#ECE7DD; --sable-2:#E4DCCB;
    --taupe:#6B6459; --line:rgba(23,24,28,.12);
    --display:"Fraunces", Georgia, serif;
    --body:"Inter", system-ui, -apple-system, sans-serif;
    --mono:"Space Mono", ui-monospace, monospace;
    --wrap:1080px;
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth; scroll-padding-top:150px}
  body{margin:0; background:var(--bone); color:var(--ink); font-family:var(--body); font-size:16px; line-height:1.65; -webkit-font-smoothing:antialiased}
  a{color:inherit}
  h1,h2,h3,h4{font-family:var(--display); font-weight:600; line-height:1.12; margin:0}
  .wrap{max-width:var(--wrap); margin:0 auto; padding:0 24px}
  .eyebrow{font-family:var(--mono); font-size:12px; letter-spacing:.18em; text-transform:uppercase; color:var(--gold)}
  .muted{color:var(--taupe)}

  /* top bar */
  header.bar{position:sticky; top:0; z-index:40; background:rgba(246,244,239,.86); backdrop-filter:blur(10px); border-bottom:1px solid var(--line)}
  .bar-in{display:flex; align-items:center; justify-content:space-between; height:66px}
  .brand{display:flex; align-items:center; gap:11px; font-family:var(--display); font-weight:600; font-size:20px}
  .bar .brand-icon{display:block; width:auto; height:46px; max-width:51px; object-fit:contain; object-position:center}
  .brand-wordmark{display:inline-flex; align-items:baseline; font-family:var(--body); font-size:clamp(21px,2vw,25px); font-weight:500; line-height:1; letter-spacing:-.045em; white-space:nowrap}
  .brand-360{color:rgb(23,24,28)}
  .brand-lieux{color:rgb(194,155,87); margin-left:4px}
  .brand .num{color:var(--gold); font-family:var(--mono); font-size:15px; margin-right:2px}
  .back{font-size:14px; font-weight:600; display:inline-flex; align-items:center; gap:7px; padding:9px 16px; border:1px solid var(--line); border-radius:999px; transition:border-color .16s ease}
  .back:hover{border-color:var(--ink)}

  /* sub nav */
  .subnav{position:sticky; top:66px; z-index:39; background:var(--sable); border-bottom:1px solid var(--line)}
  .subnav-in{display:flex; gap:8px; overflow-x:auto; padding:12px 0; scrollbar-width:none}
  .subnav-in::-webkit-scrollbar{display:none}
  .subnav a{white-space:nowrap; font-family:var(--mono); font-size:12px; letter-spacing:.04em; text-transform:uppercase; color:var(--taupe); padding:9px 15px; border:1px solid var(--line); border-radius:999px; background:var(--bone); transition:all .16s ease}
  .subnav a:hover{border-color:var(--ink); color:var(--ink)}
  .subnav a.active{background:var(--ink); color:var(--bone); border-color:var(--ink)}

  /* hero */
  .top{padding:54px 0 10px}
  .top h1{font-size:clamp(30px,4.4vw,46px)}
  .top p{margin:14px 0 0; max-width:640px; font-size:17px; color:var(--taupe)}

  /* notice */
  .notice{margin:26px 0 8px; background:#FBF3E2; border:1px solid var(--gold-soft); border-left:4px solid var(--gold); border-radius:14px; padding:16px 20px; font-size:14.5px}
  .notice strong{font-weight:600}

  /* sections */
  section.doc{padding:44px 0; border-top:1px solid var(--line)}
  section.doc:first-of-type{border-top:0}
  section.doc h2{font-size:clamp(24px,3vw,32px); margin-bottom:6px}
  section.doc > .wrap > .eyebrow{display:block; margin-bottom:10px}
  section.doc h3{font-size:19px; margin:30px 0 8px}
  section.doc h4{font-size:15.5px; font-family:var(--body); font-weight:600; margin:18px 0 4px}
  section.doc p{margin:8px 0}
  section.doc ul{margin:8px 0; padding-left:22px}
  section.doc li{margin:5px 0}
  .updated{font-family:var(--mono); font-size:12px; color:var(--taupe); letter-spacing:.04em}

  /* definition table */
  .kv{border:1px solid var(--line); border-radius:16px; overflow:hidden; margin:14px 0; background:var(--bone)}
  .kv div{display:grid; grid-template-columns:210px 1fr; gap:0; border-bottom:1px solid var(--line)}
  .kv div:last-child{border-bottom:0}
  .kv dt{font-weight:600; padding:13px 18px; background:var(--sable); font-size:14.5px}
  .kv dd{margin:0; padding:13px 18px; font-size:15px}
  @media (max-width:640px){ .kv div{grid-template-columns:1fr} .kv dt{border-bottom:1px solid var(--line)} }

  /* placeholder to fill */
  .todo{background:rgba(194,155,87,.20); border-bottom:1px dashed var(--gold); padding:0 5px; border-radius:3px; font-weight:500}

  /* callout */
  .call{background:var(--ink); color:#D8D3C9; border-radius:16px; padding:20px 22px; margin:16px 0}
  .call p{margin:6px 0}
  .call .k{font-family:var(--mono); font-size:11px; letter-spacing:.14em; text-transform:uppercase; color:var(--gold-lift); margin-bottom:6px}

  /* footer */
  footer{background:var(--ink); color:var(--bone); padding:40px 0; margin-top:20px}
  .foot{display:flex; flex-wrap:wrap; gap:20px; justify-content:space-between; align-items:center}
  .foot a{color:var(--bone); opacity:.85; font-size:14px}
  .foot a:hover{opacity:1}
  .socials{display:flex; gap:16px}
  .foot small{color:#A9A399; font-size:13px}