:root{
  --paper:#FBFAF7; --card:#FFFFFF; --sunk:#F4F3EF;
  --ink:#1A1E24; --ink-2:#565E69; --ink-3:#8B929B;
  --rule:#E4E3DD; --rule-2:#CFCEC6;
  --accent:#2C4A6E;
  --established:#2F5D50; --declared:#8A6A2F; --problem:#9C4A3C; --unestablished:#6E7681;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#16181B; --card:#1D2024; --sunk:#212429;
  --ink:#E8E7E2; --ink-2:#A2A8B0; --ink-3:#7B828B;
  --rule:#2C3036; --rule-2:#3A3F46;
  --accent:#8AB0D8;
  --established:#7BB6A2; --declared:#D2A860; --problem:#D18B7E; --unestablished:#9AA1AA;
}}
:root[data-theme="dark"]{
  --paper:#16181B; --card:#1D2024; --sunk:#212429;
  --ink:#E8E7E2; --ink-2:#A2A8B0; --ink-3:#7B828B;
  --rule:#2C3036; --rule-2:#3A3F46;
  --accent:#8AB0D8;
  --established:#7BB6A2; --declared:#D2A860; --problem:#D18B7E; --unestablished:#9AA1AA;
}
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);overflow-x:hidden;
  font:17px/1.62 "Source Serif 4",Georgia,serif;-webkit-font-smoothing:antialiased}
.wrap{max-width:1120px;margin:0 auto;padding:0 40px 96px}
/* composition desktop : colonne de lecture + rail latéral. Pas un dashboard. */
.grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:56px;align-items:start}
.rail{position:sticky;top:24px;padding:22px 24px;background:var(--card);
  border:1px solid var(--rule);border-radius:5px}
.rail h3{font-family:"Source Sans 3",system-ui,sans-serif;font-size:11px;font-weight:600;
  letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3);margin:0 0 14px}
.rail .act{display:block;width:100%;text-align:left;font:600 14px "Source Sans 3",system-ui,sans-serif;
  padding:11px 14px;margin:0 0 8px;cursor:pointer;border-radius:4px;
  background:var(--accent);border:1px solid var(--accent);color:var(--paper)}
.rail .act.ghost{background:transparent;border-color:var(--rule-2);color:var(--ink)}
.rail .act.quiet{background:transparent;border-color:transparent;color:var(--ink-2);
  padding-left:0;font-weight:400;font-size:13.5px;text-decoration:underline;
  text-underline-offset:3px;text-decoration-color:var(--rule-2)}
.rail .sep{height:1px;background:var(--rule);margin:16px 0}

/* ---------- en-tête ---------- */
header.doc{padding:44px 0 26px;border-bottom:1px solid var(--rule)}
.eyebrow{font-family:"Source Sans 3",system-ui,sans-serif;font-size:11.5px;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin-bottom:12px}
h1{font-family:"Source Sans 3",system-ui,sans-serif;font-size:27px;font-weight:600;
  letter-spacing:-.01em;margin:0 0 6px;line-height:1.25}
.fname{font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:13.5px;color:var(--ink-2)}
.lede{margin:20px 0 0;font-size:17.5px;line-height:1.55;color:var(--ink-2);max-width:62ch;text-wrap:pretty}

/* ---------- LEVEL 1 : essentiel ---------- */
.l1{margin:30px 0 0}
.l1 .k{font-family:"Source Sans 3",system-ui,sans-serif;font-size:11px;font-weight:600;
  letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3);margin:0 0 12px}
.l1 .card{padding:20px 22px;border:1px solid var(--rule);border-radius:5px;background:var(--card);
  margin:0 0 12px;position:relative;padding-left:24px}
.l1 .card::before{content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;border-radius:2px}
.l1 .c-problem::before{background:var(--problem)}
.l1 .c-unestablished::before{background:transparent;border-left:3px solid var(--rule-2)}
.l1 .c-established::before{background:var(--established)}
.l1 .card .head{font-family:"Source Sans 3",system-ui,sans-serif;font-size:12px;font-weight:600;
  margin:0 0 7px}
.l1 .card p{margin:0;font-size:17px;line-height:1.5}
.l1 .card .sub{margin-top:8px;font-size:14.5px;color:var(--ink-2)}
/* P0.3 — propriétés séparées, compactes, jamais fusionnées en une phrase unique */
.l1 .estab{padding-top:16px;padding-bottom:16px}
.l1 .estab .line{display:grid;grid-template-columns:150px 1fr;gap:14px;
  padding:8px 0;border-bottom:1px solid var(--rule)}
.l1 .estab .line:last-child{border-bottom:0}
.l1 .estab .lab{font-family:"Source Sans 3",system-ui,sans-serif;font-size:12.5px;font-weight:600;
  color:var(--established);padding-top:2px}
.l1 .estab .txt{font-size:16px;line-height:1.45}
@media (max-width:640px){
  .l1 .estab .line{grid-template-columns:1fr;gap:2px;padding:9px 0}
  .l1 .estab .txt{font-size:15.5px}
}
.l2wrap[hidden]{display:none}
.l2head{margin:46px 0 0;padding-top:26px;border-top:2px solid var(--ink)}
.l2head .k{font-family:"Source Sans 3",system-ui,sans-serif;font-size:11px;font-weight:600;
  letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3);margin:0}

/* ---------- sections ---------- */
section{margin:38px 0 0}
h2{font-family:"Source Sans 3",system-ui,sans-serif;font-size:12px;font-weight:600;
  letter-spacing:.13em;text-transform:uppercase;color:var(--ink-3);
  margin:0 0 14px;padding-bottom:9px;border-bottom:1px solid var(--rule)}

/* ---------- items : la FORME distingue, pas seulement la couleur ---------- */
.item{position:relative;padding:14px 0 14px 20px;border-bottom:1px solid var(--rule)}
.item:last-child{border-bottom:0}
.item::before{content:"";position:absolute;left:0;top:17px;bottom:15px;width:3px;border-radius:2px}
.item p{margin:0;font-size:16.5px;line-height:1.55}
.item .sub{margin-top:7px;font-size:14.5px;line-height:1.52;color:var(--ink-2);max-width:none;text-wrap:pretty}

.i-established::before{background:var(--established)}
.i-declared::before{background:repeating-linear-gradient(to bottom,var(--declared) 0 4px,transparent 4px 8px)}
.i-problem::before{background:var(--problem);box-shadow:-3px 0 0 var(--problem)}
.i-unestablished::before{background:transparent;border-left:3px solid var(--rule-2)}

.head{font-family:"Source Sans 3",system-ui,sans-serif;font-size:12.5px;font-weight:600;
  letter-spacing:.005em;margin:0 0 7px !important;line-height:1.35}
.t-established{color:var(--established)} .t-declared{color:var(--declared)}
.t-problem{color:var(--problem)} .t-unestablished{color:var(--unestablished)}

/* ---------- section secondaire ---------- */
.secondary{margin-top:44px;padding:24px 26px;background:var(--sunk);border-radius:4px}
.secondary h2{border-bottom:0;padding-bottom:0;margin-bottom:12px}
.secondary ul{margin:0;padding-left:20px;color:var(--ink-2);font-size:16px}
.secondary li{margin:6px 0}
.secondary .note{margin:14px 0 0;font-size:14.5px;color:var(--ink-3);text-wrap:pretty}

/* ---------- niveau 2 ---------- */
details{margin-top:14px;border-top:1px solid var(--rule)}
details summary{cursor:pointer;list-style:none;padding:15px 0;
  font-family:"Source Sans 3",system-ui,sans-serif;font-size:14px;font-weight:600;color:var(--accent)}
details summary::-webkit-details-marker{display:none}
details summary::after{content:" →";color:var(--ink-3)}
details[open] summary::after{content:" ↓"}
.chain{display:flex;align-items:center;flex-wrap:wrap;gap:10px;padding:6px 0 20px}
.chain .n{font-family:"Source Sans 3",system-ui,sans-serif;font-size:13px;padding:7px 13px;
  background:var(--card);border:1px solid var(--rule-2);border-radius:3px}
.chain .arrow{color:var(--ink-3);font-size:15px}
table.detail{width:100%;border-collapse:collapse;font-size:13.5px;margin:0 0 22px}
table.detail th{text-align:left;font-family:"Source Sans 3",system-ui,sans-serif;font-size:11px;
  font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);
  padding:8px 12px 8px 0;vertical-align:top;width:150px;white-space:nowrap}
table.detail td{padding:8px 0;color:var(--ink-2);border-bottom:1px solid var(--rule);
  font-family:"IBM Plex Mono",ui-monospace,Menlo,monospace;font-size:12.5px;word-break:break-word}
.dgroup{margin:0 0 26px;padding:16px 18px;background:var(--card);border:1px solid var(--rule);border-radius:4px}
.dgroup h3{font-family:"Source Sans 3",system-ui,sans-serif;font-size:14px;font-weight:600;margin:0 0 10px}

/* ---------- sélecteur de cas (prototype uniquement) ---------- */
.cases{position:sticky;top:0;z-index:10;background:var(--paper);
  border-bottom:1px solid var(--rule);padding:11px 28px;display:flex;gap:8px;align-items:center;flex-wrap:wrap;
  font-family:"Source Sans 3",system-ui,sans-serif}
.cases .lbl{font-size:10.5px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:var(--ink-3);margin-right:6px}
.cases button{font:600 13px "Source Sans 3",system-ui,sans-serif;padding:6px 13px;cursor:pointer;
  background:transparent;border:1px solid var(--rule-2);border-radius:3px;color:var(--ink-2)}
.cases button[aria-pressed="true"]{background:var(--accent);border-color:var(--accent);color:var(--paper)}
footer{margin-top:52px;padding-top:20px;border-top:1px solid var(--rule);
  font-family:"Source Sans 3",system-ui,sans-serif;font-size:12.5px;color:var(--ink-3)}

@media (max-width:980px){
  .grid{grid-template-columns:1fr;gap:32px}
  .rail{position:static}
  .wrap{max-width:760px;padding:0 28px 80px}
}
@media (max-width:640px){
  body{font-size:16px}
  .wrap{padding:0 18px 64px}
  .rail{padding:18px}
  /* premier viewport : le sens essentiel, pas une version étroite du rapport */
  header.doc{padding:20px 0 16px}
  h1{font-size:21px;margin-bottom:4px}
  .lede{margin-top:13px;font-size:15.5px;line-height:1.45}
  .eyebrow{font-size:10.5px;margin-bottom:8px}
  .l1{margin-top:20px}
  .l1 .k{margin-bottom:9px}
  .l1 .card{padding:15px 16px 15px 19px;margin-bottom:9px}
  .l1 .card p{font-size:15.5px;line-height:1.45}
  .l1 .card .head{font-size:11.5px;margin-bottom:5px}
  .cases{padding:8px 18px}
  .cases .lbl{display:none}
  header.doc{padding:30px 0 20px}
  h1{font-size:22px}
  .lede{font-size:16.5px}
  .item p{font-size:15.5px}
  .secondary{padding:20px 18px;margin-left:-18px;margin-right:-18px;border-radius:0}
  .cases{padding:10px 18px;gap:6px}
  .cases button{padding:5px 10px;font-size:12px}
  .cases .lbl{width:100%;margin:0 0 2px}
  table.detail th{width:auto;display:block;padding-bottom:2px}
  table.detail td{display:block;padding-top:0;border-bottom:0;margin-bottom:10px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}