/* ===============================
   INTELLIGENCE ARTIFICIELLE — CSS
   Thème : Réseau de neurones / Cosmos violet
   =============================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;700;900&family=Fira+Code:wght@400;500&display=swap');

:root {
  --bg:         #07050f;
  --bg-card:    #100d1e;
  --bg-panel:   #0c0a18;
  --violet:     #7c3aed;
  --violet-l:   #a78bfa;
  --violet-dim: rgba(124,58,237,0.12);
  --violet-glo: rgba(124,58,237,0.25);
  --cyan:       #22d3ee;
  --pink:       #ec4899;
  --text:       #e2dff5;
  --muted:      #6b6490;
  --dim:        #2e2a45;
  --border:     rgba(124,58,237,0.18);
  --font-h:     'Outfit', sans-serif;
  --font-m:     'Fira Code', monospace;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-h);background:var(--bg);color:var(--text);line-height:1.7;overflow-x:hidden}
::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:var(--bg)}::-webkit-scrollbar-thumb{background:var(--violet);border-radius:3px}

#nn-canvas{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.3}

.wrap{position:relative;z-index:1;max-width:1080px;margin:0 auto;padding:0 32px 100px}

/* Header */
.hdr{display:flex;align-items:center;justify-content:space-between;padding:20px 0;border-bottom:1px solid var(--border);flex-wrap:wrap;gap:10px}
.hdr nav{font-family:var(--font-m);font-size:.68rem;color:var(--muted);letter-spacing:.05em}
.hdr nav a{color:var(--violet-l);text-decoration:none}
.hdr nav span{margin:0 8px;opacity:.4}
.badge{font-family:var(--font-m);font-size:.65rem;padding:4px 14px;border:1px solid var(--border);border-radius:100px;color:var(--violet-l);background:var(--violet-dim);letter-spacing:.1em;text-transform:uppercase}

/* Hero */
.hero{padding:80px 0 56px;text-align:center}
.hero-eye{font-family:var(--font-m);font-size:.68rem;color:var(--violet-l);letter-spacing:.22em;text-transform:uppercase;margin-bottom:24px;opacity:.8}
.hero h1{font-size:clamp(2.8rem,7vw,5.2rem);font-weight:900;background:linear-gradient(135deg,var(--violet-l),var(--cyan),var(--pink));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;line-height:1.05;margin-bottom:12px;letter-spacing:-.02em}
.hero-sub{font-size:1rem;color:var(--muted);max-width:580px;margin:0 auto 40px}

/* Stats */
.stats{display:flex;justify-content:center;gap:0;border:1px solid var(--border);border-radius:12px;overflow:hidden;background:var(--bg-card);margin:0 auto 64px;max-width:700px}
.sc{flex:1;padding:22px 16px;text-align:center;border-right:1px solid var(--border);transition:background .2s}
.sc:last-child{border-right:none}
.sc:hover{background:var(--violet-dim)}
.sn{font-family:var(--font-h);font-size:1.9rem;font-weight:700;color:var(--violet-l);line-height:1}
.sl{font-family:var(--font-m);font-size:.58rem;color:var(--muted);text-transform:uppercase;letter-spacing:.1em;margin-top:5px}

/* Nav */
.snav{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:64px;padding:14px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.npill{font-family:var(--font-m);font-size:.67rem;padding:6px 15px;border:1px solid var(--border);border-radius:100px;color:var(--muted);text-decoration:none;letter-spacing:.06em;transition:all .2s;text-transform:uppercase}
.npill:hover,.npill.active{border-color:var(--violet);color:var(--violet-l);background:var(--violet-dim)}

/* Sections */
.cs{margin-bottom:84px;opacity:0;transform:translateY(20px);transition:opacity .55s,transform .55s}
.cs.vis{opacity:1;transform:none}
.sh{display:flex;align-items:center;gap:16px;margin-bottom:32px;padding-bottom:16px;border-bottom:1px solid var(--border)}
.si{width:46px;height:46px;background:var(--violet-dim);border:1px solid var(--border);border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;flex-shrink:0}
.snum{font-family:var(--font-m);font-size:.6rem;color:var(--dim);display:block;letter-spacing:.08em}
.stitle{font-family:var(--font-h);font-size:clamp(1.5rem,3vw,2rem);font-weight:700;color:var(--text);letter-spacing:-.01em}

/* Cards */
.cgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(285px,1fr));gap:16px}
.cg2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:24px;position:relative;overflow:hidden;transition:transform .25s,border-color .25s}
.card:hover{transform:translateY(-3px);border-color:rgba(124,58,237,.4)}
.card::after{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--violet),var(--cyan));transform:scaleX(0);transform-origin:left;transition:transform .4s}
.card:hover::after{transform:scaleX(1)}
.chip{font-family:var(--font-m);font-size:.6rem;padding:2px 9px;border-radius:4px;display:inline-block;margin-bottom:10px;letter-spacing:.08em;text-transform:uppercase;background:var(--violet-dim);color:var(--violet-l);border:1px solid var(--border)}
.card h3{font-size:1rem;font-weight:600;color:var(--text);margin-bottom:8px}
.card p{font-size:.87rem;color:var(--muted);line-height:1.65}

/* Code */
.code{background:#040310;border:1px solid var(--border);border-radius:10px;overflow:hidden;margin:20px 0}
.code-hdr{display:flex;align-items:center;justify-content:space-between;padding:10px 18px;background:var(--bg-panel);border-bottom:1px solid var(--border)}
.code-lang{font-family:var(--font-m);font-size:.63rem;color:var(--violet-l);letter-spacing:.1em;text-transform:uppercase}
.dots{display:flex;gap:5px}
.dots span{width:9px;height:9px;border-radius:50%}
.dots span:nth-child(1){background:#ff5f57}
.dots span:nth-child(2){background:#febc2e}
.dots span:nth-child(3){background:#28c840}
.code pre{padding:20px;font-family:var(--font-m);font-size:.78rem;line-height:1.8;color:#8878b8;overflow-x:auto}
.code .kw{color:var(--violet-l)}.code .fn{color:var(--cyan)}.code .st{color:#f9a8d4}.code .nm{color:#fb923c}.code .cm{color:#3d3560;font-style:italic}

/* Table */
.tbl{width:100%;border-collapse:collapse;font-size:.85rem;margin:16px 0}
.tbl thead th{font-family:var(--font-m);font-size:.62rem;letter-spacing:.1em;text-transform:uppercase;color:var(--violet-l);padding:12px 14px;text-align:left;border-bottom:1px solid var(--border);background:var(--bg-card)}
.tbl tbody td{padding:12px 14px;border-bottom:1px solid rgba(124,58,237,.06);color:var(--muted);vertical-align:top}
.tbl tbody td:first-child{color:var(--text);font-family:var(--font-m);font-size:.78rem}
.tbl tbody tr:hover td{background:var(--violet-dim)}
.tag{font-family:var(--font-m);font-size:.6rem;padding:2px 7px;border-radius:3px;background:rgba(34,211,238,.1);color:var(--cyan);border:1px solid rgba(34,211,238,.2)}

/* Timeline */
.tl{position:relative;padding-left:28px}
.tl::before{content:'';position:absolute;left:6px;top:6px;bottom:6px;width:1px;background:linear-gradient(to bottom,var(--violet),transparent)}
.tli{position:relative;margin-bottom:28px}
.tli::before{content:'';position:absolute;left:-24px;top:6px;width:7px;height:7px;border-radius:50%;background:var(--violet);box-shadow:0 0 8px var(--violet-glo)}
.tly{font-family:var(--font-m);font-size:.65rem;color:var(--violet-l);margin-bottom:3px;letter-spacing:.08em}
.tli h4{font-size:.97rem;font-weight:600;color:var(--text);margin-bottom:3px}
.tli p{font-size:.86rem;color:var(--muted)}

/* Info box */
.info{background:var(--violet-dim);border:1px solid var(--border);border-left:3px solid var(--violet);border-radius:0 10px 10px 0;padding:20px 24px;margin:20px 0}
.info-t{font-family:var(--font-m);font-size:.7rem;color:var(--violet-l);text-transform:uppercase;letter-spacing:.1em;margin-bottom:8px}
.info p{font-size:.9rem;color:var(--muted);line-height:1.65}

/* Pipeline */
.pipe{display:flex;gap:0;flex-wrap:wrap;border:1px solid var(--border);border-radius:12px;overflow:hidden;margin:20px 0;background:var(--bg-card)}
.ps{flex:1;min-width:120px;padding:20px 14px;text-align:center;border-right:1px solid var(--border);transition:background .2s}
.ps:last-child{border-right:none}
.ps:hover{background:var(--violet-dim)}
.pi{font-size:1.4rem;margin-bottom:6px}
.pn{font-family:var(--font-m);font-size:.65rem;color:var(--violet-l);text-transform:uppercase;letter-spacing:.07em;display:block;margin-bottom:4px}
.ps p{font-size:.75rem;color:var(--muted)}

/* Tools */
.tpill{display:inline-flex;align-items:center;gap:6px;padding:6px 13px;background:var(--bg-card);border:1px solid var(--border);border-radius:8px;margin:4px;font-family:var(--font-m);font-size:.74rem;color:var(--muted);transition:all .2s}
.tpill:hover{border-color:var(--violet);color:var(--violet-l)}
.tpill .d{width:5px;height:5px;border-radius:50%;background:var(--violet)}

/* Footer */
.ftr{margin-top:80px;padding-top:22px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.ftr p{font-family:var(--font-m);font-size:.65rem;color:var(--dim)}
.ftr a{color:var(--violet-l);text-decoration:none}

@media(max-width:720px){.wrap{padding:0 18px 80px}.stats{flex-wrap:wrap}.sc{min-width:50%}.cg2{grid-template-columns:1fr}.pipe{flex-direction:column}.ps{border-right:none;border-bottom:1px solid var(--border)}}