/* ===============================
   MACHINE LEARNING — CSS
   Thème : Données / Mathématique / Academic Clean
   =============================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;600;700;800&family=Roboto+Mono:wght@400;500&display=swap');

:root {
  --bg:      #f8faff;
  --bg2:     #eef2fc;
  --white:   #ffffff;
  --primary: #1e3a8a;
  --accent:  #2563eb;
  --acc2:    #059669;
  --acc3:    #d97706;
  --asoft:   rgba(37,99,235,0.08);
  --text:    #111827;
  --muted:   #6b7280;
  --border:  #dde4f5;
  --shadow:  0 4px 24px rgba(30,58,138,.07);
  --shadowl: 0 12px 40px rgba(30,58,138,.12);
  --font-h:  'Plus Jakarta Sans', sans-serif;
  --font-m:  'Roboto Mono', 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(--accent);border-radius:3px}

/* Grid bg */
body::before{content:'';position:fixed;inset:0;background-image:linear-gradient(rgba(37,99,235,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(37,99,235,.04) 1px,transparent 1px);background-size:44px 44px;pointer-events:none;z-index:0}

#ml-canvas{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.55}

.wrap{position:relative;z-index:1;max-width:1100px;margin:0 auto;padding:0 34px 100px}

/* Header */
.hdr{display:flex;align-items:center;justify-content:space-between;padding:18px 0;border-bottom:1px solid var(--border);flex-wrap:wrap;gap:10px;background:transparent}
.hdr nav{font-family:var(--font-m);font-size:.68rem;color:var(--muted)}
.hdr nav a{color:var(--accent);text-decoration:none}
.hdr nav span{margin:0 7px;opacity:.4}
.badge{font-family:var(--font-m);font-size:.64rem;padding:4px 14px;border:1.5px solid var(--border);border-radius:100px;color:var(--accent);background:var(--asoft);letter-spacing:.08em;text-transform:uppercase}

/* Hero */
.hero{padding:72px 0 48px;display:grid;grid-template-columns:1fr 360px;gap:48px;align-items:center}
.hero-tag{font-family:var(--font-m);font-size:.68rem;color:var(--accent);letter-spacing:.2em;text-transform:uppercase;margin-bottom:18px}
.hero h1{font-size:clamp(2.6rem,5vw,4rem);font-weight:800;color:var(--primary);letter-spacing:-.025em;line-height:1.05;margin-bottom:20px}
.hero h1 span{color:var(--accent)}
.hero-desc{font-size:1rem;color:var(--muted);line-height:1.8;margin-bottom:28px}
.hero-visual{background:var(--white);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadowl);overflow:hidden}
.hv-header{background:var(--primary);padding:12px 18px;display:flex;align-items:center;justify-content:space-between}
.hv-title{font-family:var(--font-m);font-size:.65rem;color:rgba(255,255,255,.5);letter-spacing:.07em}
.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}
.hv-body{padding:20px;font-family:var(--font-m);font-size:.75rem;color:var(--muted);line-height:1.8}
.hv-body .kw{color:#6d28d9}.hv-body .fn{color:var(--accent)}.hv-body .st{color:#059669}.hv-body .nm{color:#d97706}.hv-body .cm{color:#9ca3af;font-style:italic}
.hv-body .ln{color:#d1d5db;margin-right:14px;user-select:none}

/* Stats strip */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:var(--white);border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);margin-bottom:64px}
.sc{padding:22px 18px;border-right:1px solid var(--border);transition:background .2s;text-align:center}
.sc:last-child{border-right:none}.sc:hover{background:var(--asoft)}
.sn{font-family:var(--font-h);font-size:1.9rem;font-weight:800;color:var(--accent);line-height:1;letter-spacing:-.02em}
.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:60px;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:7px 15px;border:1.5px solid var(--border);border-radius:100px;color:var(--muted);text-decoration:none;letter-spacing:.05em;transition:all .2s;background:var(--white)}
.npill:hover,.npill.active{border-color:var(--accent);color:var(--accent);background:var(--asoft)}

/* Sections */
.cs{margin-bottom:84px;opacity:0;transform:translateY(18px);transition:opacity .55s,transform .55s}
.cs.vis{opacity:1;transform:none}
.sh{display:flex;align-items:center;gap:14px;margin-bottom:30px;padding-bottom:18px;border-bottom:1px solid var(--border)}
.si{width:46px;height:46px;background:var(--asoft);border:1.5px solid rgba(37,99,235,.2);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(--muted);display:block;letter-spacing:.08em}
.stitle{font-family:var(--font-h);font-size:clamp(1.5rem,3vw,1.9rem);font-weight:800;color:var(--primary);letter-spacing:-.015em}

/* Cards */
.cgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(285px,1fr));gap:18px}
.card{background:var(--white);border:1px solid var(--border);border-radius:14px;padding:24px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s,border-color .25s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadowl);border-color:rgba(37,99,235,.3)}
.card-glow{position:absolute;top:0;right:0;width:70px;height:70px;background:radial-gradient(circle at top right,var(--asoft),transparent 70%)}
.chip{font-family:var(--font-m);font-size:.6rem;padding:2px 9px;border-radius:4px;display:inline-block;margin-bottom:10px;letter-spacing:.07em;text-transform:uppercase;background:var(--asoft);color:var(--accent);border:1px solid rgba(37,99,235,.2)}
.chip.g{background:rgba(5,150,105,.08);color:var(--acc2);border-color:rgba(5,150,105,.2)}
.chip.o{background:rgba(217,119,6,.08);color:var(--acc3);border-color:rgba(217,119,6,.2)}
.card h3{font-size:1rem;font-weight:700;color:var(--primary);margin-bottom:8px}
.card p{font-size:.87rem;color:var(--muted);line-height:1.65}

/* Code */
.code{background:var(--primary);border-radius:12px;overflow:hidden;margin:20px 0;box-shadow:var(--shadowl)}
.code-hdr{display:flex;align-items:center;justify-content:space-between;padding:10px 18px;background:rgba(255,255,255,.07);border-bottom:1px solid rgba(255,255,255,.08)}
.code-lang{font-family:var(--font-m);font-size:.63rem;color:#93c5fd;letter-spacing:.1em;text-transform:uppercase}
.code pre{padding:20px;font-family:var(--font-m);font-size:.78rem;line-height:1.8;color:#94a3b8;overflow-x:auto}
.code .kw{color:#818cf8}.code .fn{color:#22d3ee}.code .st{color:#86efac}.code .nm{color:#fb923c}.code .cm{color:#475569;font-style:italic}

/* Table */
.tbl{width:100%;border-collapse:collapse;font-size:.85rem;margin:16px 0;background:var(--white);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.tbl thead th{font-family:var(--font-h);font-size:.8rem;font-weight:700;color:#fff;padding:14px 16px;text-align:left;background:var(--primary)}
.tbl thead th:first-child{background:#1e3066}
.tbl tbody td{padding:13px 16px;border-bottom:1px solid var(--border);color:var(--muted);vertical-align:top}
.tbl tbody td:first-child{font-family:var(--font-m);font-size:.78rem;font-weight:500;color:var(--primary);background:var(--bg2)}
.tbl tbody tr:last-child td{border-bottom:none}
.tbl tbody tr:hover td{background:var(--asoft)}
.tag{font-family:var(--font-m);font-size:.6rem;padding:2px 8px;border-radius:4px;background:var(--asoft);color:var(--accent);border:1px solid rgba(37,99,235,.2)}
.tag.g{background:rgba(5,150,105,.08);color:var(--acc2);border-color:rgba(5,150,105,.2)}

/* Math */
.math{background:var(--bg2);border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:0 12px 12px 0;padding:22px 26px;margin:18px 0}
.math-t{font-family:var(--font-m);font-size:.68rem;color:var(--accent);text-transform:uppercase;letter-spacing:.1em;margin-bottom:10px}
.math-f{font-family:var(--font-m);font-size:.95rem;color:var(--primary);letter-spacing:.04em;line-height:1.8;margin-bottom:8px}
.math p{font-size:.88rem;color:var(--muted)}

/* Pipeline */
.pipe{display:flex;background:var(--white);border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow);margin:20px 0}
.ps{flex:1;min-width:110px;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(--asoft)}
.pi{font-size:1.4rem;margin-bottom:6px}
.pn{font-family:var(--font-m);font-size:.63rem;color:var(--accent);text-transform:uppercase;letter-spacing:.07em;display:block;margin-bottom:3px;font-weight:500}
.ps p{font-size:.73rem;color:var(--muted)}

/* Tools */
.tpill{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;background:var(--white);border:1px solid var(--border);border-radius:8px;margin:4px;font-family:var(--font-m);font-size:.73rem;color:var(--muted);box-shadow:0 1px 4px rgba(0,0,0,.05);transition:all .2s}
.tpill:hover{border-color:var(--accent);color:var(--accent)}
.tpill .d{width:5px;height:5px;border-radius:50%;background:var(--accent)}

/* 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(--muted)}
.ftr a{color:var(--accent);text-decoration:none}

@media(max-width:860px){.hero{grid-template-columns:1fr}.hero-visual{display:none}.stats{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.wrap{padding:0 16px 80px}.pipe{flex-wrap:wrap}.ps{border-right:none;border-bottom:1px solid var(--border)}}