:root{
  --navy:#1F4E79; --blue:#0C69AE; --yellow:#F2CA3A;
  --ink:#1c2733; --grey:#6b7785; --line:#e2e6ea; --bg:#f5f7fa;
  --ok:#17794a; --okbg:#e3f5ec; --err:#b3261e; --errbg:#fce8e6;
  --infobg:#e8f0fb;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.5}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}

.topbar{display:flex;align-items:center;gap:16px;flex-wrap:wrap;background:var(--navy);color:#fff;padding:10px 20px}
.brand{color:#fff;font-weight:700;font-size:1.15rem}
.brand:hover{text-decoration:none}
.univ{color:#cdd9e7;font-size:.85rem;border-left:1px solid #3a6293;padding-left:16px}
.nav{margin-left:auto;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.nav a{color:#dce6f1;font-size:.92rem}
.nav a.active{color:#fff;font-weight:600;text-decoration:underline}
.nav .who{color:#9fb6cf;font-size:.82rem;border-left:1px solid #3a6293;padding-left:14px}
.inline{display:inline}
button.link{background:none;border:none;color:#dce6f1;cursor:pointer;font-size:.92rem;padding:0}
button.link:hover{text-decoration:underline}

.container{max-width:980px;margin:24px auto;padding:0 20px}
.footer{text-align:center;color:var(--grey);font-size:.8rem;padding:24px}

h1{color:var(--navy);font-size:1.5rem;margin:.2em 0 .6em}
h2{color:var(--navy);font-size:1.15rem;margin:1.2em 0 .5em}
p.lead{color:var(--grey)}

.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:20px;margin-bottom:18px}
.card h2:first-child{margin-top:0}
.grid{display:grid;gap:16px}
.grid-2{grid-template-columns:1fr 1fr}
.grid-3{grid-template-columns:repeat(3,1fr)}
@media(max-width:720px){.grid-2,.grid-3{grid-template-columns:1fr}}

.kpi{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px;text-align:center}
.kpi .n{font-size:1.8rem;font-weight:700;color:var(--blue)}
.kpi .l{color:var(--grey);font-size:.85rem}

label{display:block;font-weight:600;font-size:.9rem;margin:12px 0 4px}
input[type=text],input[type=email],input[type=password],select,textarea{
  width:100%;padding:9px 11px;border:1px solid #cfd6dd;border-radius:7px;font:inherit;background:#fff}
textarea{min-height:80px;resize:vertical}
select[multiple]{min-height:110px}
.check{display:flex;gap:8px;align-items:flex-start;margin:10px 0;font-weight:400}
.check input{margin-top:3px}

.btn{display:inline-block;background:var(--blue);color:#fff;border:none;border-radius:7px;padding:10px 18px;font:inherit;font-weight:600;cursor:pointer}
.btn:hover{background:#0a578f;text-decoration:none}
.btn-sm{padding:5px 11px;font-size:.85rem}
.btn-ghost{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.btn-warn{background:#fff;color:var(--err);border:1px solid var(--err)}
.btn-ok{background:var(--ok)}

table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line)}
th{background:#eef2f6;color:var(--navy)}
.tag{display:inline-block;padding:2px 8px;border-radius:20px;font-size:.75rem;font-weight:600}
.tag-pub{background:var(--okbg);color:var(--ok)}
.tag-draft{background:#f0f0f0;color:var(--grey)}
.tag-ok{background:var(--okbg);color:var(--ok)}
.tag-err{background:var(--errbg);color:var(--err)}
.tag-pending{background:#fff4d6;color:#8a6d00}

.flash{padding:11px 15px;border-radius:8px;margin-bottom:16px;font-size:.92rem}
.flash-success{background:var(--okbg);color:var(--ok)}
.flash-error{background:var(--errbg);color:var(--err)}
.flash-info{background:var(--infobg);color:var(--navy)}

.auth{max-width:420px;margin:40px auto}
.muted{color:var(--grey);font-size:.85rem}
.row-between{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}

/* Chat */
.chat{display:flex;flex-direction:column;gap:12px;height:52vh;min-height:300px;max-height:620px;overflow-y:auto;padding-right:8px;scroll-behavior:smooth}
.chat::-webkit-scrollbar{width:9px}
.chat::-webkit-scrollbar-thumb{background:#c7d0d9;border-radius:5px}
.chat::-webkit-scrollbar-thumb:hover{background:#aab6c2}
.msg{padding:12px 14px;border-radius:10px;max-width:85%}
.msg.user{align-self:flex-end;background:var(--navy);color:#fff}
.msg.assistant{align-self:flex-start;background:#fff;border:1px solid var(--line)}
.msg .sources{margin-top:8px;font-size:.8rem;color:var(--grey);border-top:1px dashed var(--line);padding-top:6px}
.eval{display:flex;gap:8px;align-items:center;margin-top:8px}
.eval .done{font-size:.82rem;color:var(--grey)}
.layout-split{display:grid;grid-template-columns:240px 1fr;gap:18px}
@media(max-width:720px){.layout-split{grid-template-columns:1fr}}
.menu{font-size:.88rem}
.menu li{margin:3px 0}

/* Contenu Markdown rendu (réponses du bot, réponses modèles) */
.md p{margin:0 0 .55em}
.md p:last-child{margin-bottom:0}
.md ul,.md ol{margin:.3em 0 .7em;padding-left:1.25em}
.md li{margin:.2em 0}
.md strong{font-weight:700}
.md em{font-style:italic}
.md code{background:#eef2f6;border:1px solid #e2e6ea;border-radius:4px;padding:.05em .35em;font-size:.85em;font-family:Consolas,Menlo,monospace}
.md .md-h{font-weight:700;color:var(--navy);margin:.7em 0 .25em;font-size:.98rem}
.md hr{border:none;border-top:1px solid var(--line);margin:.6em 0}
.md a{color:var(--blue);text-decoration:underline}
.msg.assistant .md a{color:#7fb3e0}
.msg.user .md p{margin:0}

/* Menu de cours repliable (accordéon) */
.menu-tree{list-style:none;padding-left:0;margin:0;max-height:46vh;min-height:160px;overflow-y:auto;padding-right:6px}
.menu-tree::-webkit-scrollbar{width:8px}
.menu-tree::-webkit-scrollbar-thumb{background:#c7d0d9;border-radius:4px}
.menu-tree::-webkit-scrollbar-thumb:hover{background:#aab6c2}
.menu-tree>li{margin:1px 0}
.menu-tree details>summary{cursor:pointer;font-weight:600;color:var(--navy);padding:5px 4px;border-radius:6px;list-style:none;display:flex;align-items:center;gap:6px}
.menu-tree details>summary:hover{background:#eef2f6}
.menu-tree details>summary::-webkit-details-marker{display:none}
.menu-tree details>summary::before{content:"\25B8";display:inline-block;color:var(--blue);transition:transform .15s ease;font-size:.8em}
.menu-tree details[open]>summary::before{transform:rotate(90deg)}
.menu-tree details>ul{list-style:none;padding-left:20px;margin:1px 0 5px;border-left:2px solid var(--line)}
.menu-tree details>ul li{margin:1px 0}
.menu-tree a{display:block;padding:3px 6px;border-radius:6px;color:#33424f;font-size:.86rem}
.menu-tree a:hover{background:#eef2f6;text-decoration:none}
.menu-tree a.active{background:var(--infobg);color:var(--navy);font-weight:600}
.menu-tree a.chapter-all{color:var(--blue);font-style:italic;font-size:.82rem}
.menu-tree li.leaf{padding:5px 4px;font-weight:600;color:var(--navy)}
.menu-tree li.leaf a{color:var(--navy);padding:0}