/* ==========================================================================
   Cours PASS — feuille de style
   ========================================================================== */
*{box-sizing:border-box}
:root{
  --bg:#f4f7fb; --paper:#fff; --ink:#172033; --muted:#667085;
  --accent:#6d4aff; --accent2:#05a89f; --line:#dfe6f0;
  --radius:18px; --shadow:0 12px 34px rgba(30,42,70,.08);
}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);line-height:1.65;
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif}
h1,h2,h3{line-height:1.2;margin:0}
a{color:inherit}

/* ---------- barre supérieure ---------- */
.topbar{display:flex;align-items:center;justify-content:space-between;
  padding:16px 6vw;background:var(--paper);border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:20}
.brand{font-size:19px;font-weight:800;letter-spacing:-.01em}
.brand .logo{color:var(--accent);margin-right:4px}
.brand b{color:var(--accent)}
.status{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--muted)}
.dot{width:9px;height:9px;border-radius:50%;background:#c3ccdb;flex:none;transition:.3s}
.dot.ok{background:#2fb56b;box-shadow:0 0 0 3px rgba(47,181,107,.18)}
.dot.ko{background:#e0564f;box-shadow:0 0 0 3px rgba(224,86,79,.18)}

/* ---------- hero + chat ---------- */
main{width:min(1080px,calc(100% - 40px));margin:auto;padding:44px 0 70px}
.hero{text-align:center;margin-bottom:60px}
.hero h1{font-size:clamp(30px,5vw,46px);letter-spacing:-.02em}
.hero .sub{max-width:620px;margin:14px auto 30px;color:var(--muted);font-size:16.5px}

.chat{background:var(--paper);border:1px solid var(--line);border-radius:24px;
  box-shadow:var(--shadow);padding:20px;text-align:left;max-width:820px;margin:auto}
.chat-log{max-height:52vh;overflow-y:auto;padding:4px 4px 2px;display:flex;
  flex-direction:column;gap:14px}
.msg{display:flex}
.msg.user{justify-content:flex-end}
.bubble{max-width:82%;padding:13px 17px;border-radius:16px;font-size:15.3px;
  white-space:pre-wrap;word-wrap:break-word}
.msg.bot .bubble{background:#f2f4fa;border:1px solid var(--line);border-bottom-left-radius:5px}
.msg.user .bubble{background:linear-gradient(135deg,#6142e8,#8259f7);color:#fff;
  border-bottom-right-radius:5px}
.msg.bot .bubble strong{color:var(--accent)}
.bubble.err{background:#fdeceb;border-color:#f3c3bf;color:#a4322b}

.typing{display:inline-flex;gap:4px;padding:3px 0}
.typing i{width:7px;height:7px;border-radius:50%;background:#b9c2d4;animation:bl 1.2s infinite}
.typing i:nth-child(2){animation-delay:.18s}
.typing i:nth-child(3){animation-delay:.36s}
@keyframes bl{0%,60%,100%{opacity:.3}30%{opacity:1}}

.sources{display:flex;flex-wrap:wrap;gap:7px;margin-top:11px}
.source{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;
  padding:5px 10px;border-radius:999px;text-decoration:none;
  background:color-mix(in srgb,var(--accent2) 11%,#fff);
  color:#0a7d76;border:1px solid color-mix(in srgb,var(--accent2) 32%,var(--line))}
.source:hover{background:color-mix(in srgb,var(--accent2) 20%,#fff)}

.suggestions{display:flex;flex-wrap:wrap;gap:8px;margin:16px 2px 0}
.chip{font:inherit;font-size:13px;font-weight:600;color:var(--accent);cursor:pointer;
  padding:7px 13px;border-radius:999px;background:color-mix(in srgb,var(--accent) 8%,#fff);
  border:1px solid color-mix(in srgb,var(--accent) 25%,var(--line));transition:.15s}
.chip:hover{background:color-mix(in srgb,var(--accent) 16%,#fff);transform:translateY(-1px)}

.composer{display:flex;gap:10px;margin-top:16px}
.composer input{flex:1;font:inherit;font-size:15.5px;padding:14px 17px;border-radius:14px;
  border:1px solid var(--line);background:var(--bg);color:var(--ink)}
.composer input:focus{outline:2px solid color-mix(in srgb,var(--accent) 45%,transparent);
  outline-offset:1px;background:#fff}
.composer button{width:52px;border:0;border-radius:14px;cursor:pointer;color:#fff;
  background:linear-gradient(135deg,#6142e8,#8259f7);display:grid;place-items:center;transition:.15s}
.composer button:hover{filter:brightness(1.08)}
.composer button:disabled{opacity:.45;cursor:not-allowed}
.disclaimer{font-size:11.5px;color:var(--muted);margin:12px 2px 0}

/* ---------- catalogue ---------- */
.catalog-head{display:flex;align-items:center;justify-content:space-between;gap:16px;
  margin-bottom:20px;flex-wrap:wrap}
.catalog h2{font-size:24px}
.filter{font:inherit;font-size:14px;padding:10px 14px;border-radius:12px;
  border:1px solid var(--line);background:var(--paper);min-width:200px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.card{display:flex;flex-direction:column;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px;text-decoration:none;box-shadow:var(--shadow);
  transition:.2s transform,.2s box-shadow}
.card:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(30,42,70,.13)}
.card .tag{align-self:flex-start;font-size:10.5px;font-weight:900;letter-spacing:.13em;
  text-transform:uppercase;color:var(--accent);
  background:color-mix(in srgb,var(--accent) 11%,transparent);
  padding:4px 9px;border-radius:999px;margin-bottom:12px}
.card h3{font-size:19px;margin-bottom:8px}
.card p{color:var(--muted);font-size:14px;margin:0 0 16px;flex:1}
.card .go{font-size:13.5px;font-weight:700;color:var(--accent)}
.card .meta{font-size:12px;color:var(--muted);margin-top:10px;
  border-top:1px solid var(--line);padding-top:10px}
.loading,.empty{color:var(--muted);font-size:14px}

footer{border-top:1px solid var(--line);background:var(--paper);
  padding:26px 6vw;color:var(--muted);font-size:12.5px;text-align:center}

@media(max-width:640px){
  main{width:calc(100% - 28px)}
  .chat{padding:15px;border-radius:18px}
  .bubble{max-width:92%}
}