*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --ink:#1e3a5f;
  --ink-soft:#2c4a72;
  --ink-light:#4a6a92;
  --paper:#ffffff;
  --paper-warm:#fbfaf6;
  --paper-cool:#f4f6fa;
  --line:#dde3ec;
  --line-soft:#e8edf3;
  --text:#000000;
  --text-soft:#1a2436;
  --muted:#4a5568;
  --accent:#c19a3e;
  --accent-soft:#e9d9b2;
  --heading:#1e3a5f;
  --hdr-bg:rgba(255,255,255,.94);
  --appel-bg:#1e3a5f;
  --appel-text:#ffffff;
  --appel-text-soft:#dde3ec;
  --logo-filter:none;
}
[data-theme="dark"]{
  --ink:#4a6a92;
  --ink-soft:#6b8bb5;
  --ink-light:#93afd6;
  --paper:#0f172a;
  --paper-warm:#1a2436;
  --paper-cool:#131c2c;
  --line:#2d3a4f;
  --line-soft:#1f2937;
  --text:#f1f5f9;
  --text-soft:#cbd5e1;
  --muted:#94a3b8;
  --accent:#d4b878;
  --accent-soft:#8b6b2a;
  --heading:#f1f5f9;
  --hdr-bg:rgba(15,23,42,.94);
  --appel-bg:#1a2436;
  --appel-text:#f1f5f9;
  --appel-text-soft:#cbd5e1;
  --logo-filter:brightness(0) invert(1) opacity(.92);
}
html,body{min-height:100%;background:var(--paper);color:var(--text);font-family:'Inter',-apple-system,BlinkMacSystemFont,sans-serif;font-size:16px;font-weight:600;line-height:1.65;-webkit-font-smoothing:antialiased;transition:background-color .2s,color .2s}
a{color:var(--ink);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--accent)}
h1,h2,h3,h4{font-family:'Source Serif Pro',Georgia,serif;font-weight:600;color:var(--heading);letter-spacing:-.01em;line-height:1.2}
.serif{font-family:'Source Serif Pro',Georgia,serif}
.muted{color:var(--muted)}
.text-soft{color:var(--text-soft)}
.wrap{max-width:1100px;margin:0 auto;padding:0 28px}
.wrap-narrow{max-width:780px;margin:0 auto;padding:0 28px}
section{padding:88px 0;border-bottom:1px solid var(--line-soft)}
section:last-of-type{border-bottom:none}

/* Header */
header{position:sticky;top:0;z-index:50;background:var(--hdr-bg);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:background-color .2s,border-color .2s}
.hdr{display:flex;align-items:center;justify-content:space-between;padding:14px 28px;max-width:1100px;margin:0 auto;gap:24px}
.hdr-brand{display:flex;align-items:center;gap:14px;text-decoration:none}
.hdr-logo{width:36px;height:36px;object-fit:contain;filter:var(--logo-filter)}
.hdr-mark{font-family:'Source Serif Pro',serif;font-weight:700;font-size:18px;color:var(--heading);line-height:1.1}
.hdr-mark small{display:block;font-family:'Inter',sans-serif;font-weight:500;font-size:10.5px;letter-spacing:.13em;text-transform:uppercase;color:var(--muted);margin-top:2px}
.hdr-nav{display:flex;gap:14px;font-size:14px;align-items:center}
.hdr-nav a{color:var(--text-soft);text-decoration:none;font-weight:600}
.hdr-nav a:hover{color:var(--heading)}
.hdr-nav a.active{color:var(--heading);font-weight:700}
.hdr-nav .nav-cta{padding:7px 16px;border:1px solid var(--ink);border-radius:999px;color:var(--ink)}
.hdr-nav .nav-cta:hover{background:var(--ink);color:#fff}

/* Boutons utilitaires header : theme + lecture vocale */
.hdr-tools{display:inline-flex;gap:8px;align-items:center;margin-left:4px}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:transparent;border:1px solid var(--line);color:var(--text-soft);cursor:pointer;padding:0;transition:all .18s;font-family:inherit}
.icon-btn:hover{background:var(--paper-warm);color:var(--heading);border-color:var(--ink)}
.icon-btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.theme-toggle .icon-sun{display:none}
[data-theme="dark"] .theme-toggle .icon-moon{display:none}
[data-theme="dark"] .theme-toggle .icon-sun{display:inline-block}
.tts-toggle.is-playing{background:var(--ink);color:#fff;border-color:var(--ink)}
.tts-toggle.is-playing svg{stroke:#fff}
.tts-toggle .icon-stop{display:none}
.tts-toggle.is-playing .icon-speaker{display:none}
.tts-toggle.is-playing .icon-stop{display:inline-block}

/* Surlignage du bloc en cours de lecture vocale */
.tts-active{position:relative;background:rgba(193,154,62,.10);box-shadow:-4px 0 0 0 var(--accent);transition:background-color .25s,box-shadow .25s;border-radius:2px}
[data-theme="dark"] .tts-active{background:rgba(212,184,120,.12);box-shadow:-4px 0 0 0 var(--accent)}

/* Hero */
.hero{padding:120px 0 96px;text-align:center;background:linear-gradient(180deg,var(--paper-warm) 0%,var(--paper) 100%)}
.hero-compact{padding:88px 0 56px}
.hero-eyebrow{display:inline-block;font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);font-weight:600;padding:7px 18px;border:1px solid var(--accent-soft);border-radius:999px;background:#fff;margin-bottom:32px}
.hero h1{font-size:clamp(36px,5.2vw,60px);max-width:900px;margin:0 auto 28px;font-weight:600}
.hero-compact h1{font-size:clamp(30px,4vw,46px)}
.hero h1 em{font-style:italic;color:var(--ink-soft)}
.hero-lead{font-size:clamp(17px,2vw,20px);max-width:680px;margin:0 auto 18px;color:var(--text);font-weight:600}
.hero-sub{font-size:15px;max-width:640px;margin:0 auto 44px;color:var(--muted);font-style:italic}
.hero-ctas{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 26px;border-radius:6px;font-family:inherit;font-size:14.5px;font-weight:600;border:1px solid var(--ink);background:var(--ink);color:#fff;cursor:pointer;transition:all .18s;text-decoration:none;letter-spacing:.01em}
.btn:hover{background:var(--ink-soft);border-color:var(--ink-soft);color:#fff}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-small{padding:10px 18px;font-size:13.5px}

/* Section titles */
.sec-eyebrow{font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);font-weight:600;text-align:center;margin-bottom:18px}
.sec-title{font-size:clamp(28px,3.6vw,40px);text-align:center;max-width:780px;margin:0 auto 18px}
.sec-lead{font-size:17px;color:var(--text-soft);text-align:center;max-width:680px;margin:0 auto 56px;line-height:1.6}

/* Question fondatrice */
.question{background:var(--paper-warm);text-align:center;padding:100px 0}
.question blockquote{font-family:'Source Serif Pro',serif;font-style:italic;font-size:clamp(22px,3.2vw,32px);color:var(--ink);max-width:720px;margin:0 auto 18px;line-height:1.4;font-weight:600}
.question blockquote::before{content:'« ';color:var(--accent);font-style:normal}
.question blockquote::after{content:' »';color:var(--accent);font-style:normal}
.question p{font-size:15px;color:var(--text-soft);max-width:520px;margin:0 auto}

/* Figures (5) */
.figures{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;max-width:1000px;margin:0 auto}
.figure{padding:28px 20px;text-align:center;border:1px solid var(--line);border-radius:8px;background:#fff;transition:border-color .18s,transform .18s}
.figure:hover{border-color:var(--ink);transform:translateY(-3px)}
.figure-icon{font-family:'Source Serif Pro',serif;font-size:32px;color:var(--accent);font-weight:600;margin-bottom:12px;line-height:1}
.figure-title{font-family:'Source Serif Pro',serif;font-size:16px;color:var(--ink);font-weight:600;margin-bottom:6px}
.figure-desc{font-size:13px;color:var(--text-soft);line-height:1.5}

/* 3 piliers */
.piliers{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;max-width:980px;margin:0 auto}
.pilier{padding:36px 28px;border:1px solid var(--line);border-radius:10px;background:#fff;display:flex;flex-direction:column}
.pilier-num{font-family:'Source Serif Pro',serif;font-size:14px;color:var(--accent);font-weight:600;letter-spacing:.12em;margin-bottom:14px}
.pilier-title{font-size:22px;margin-bottom:14px}
.pilier-lead{font-size:14.5px;color:var(--text-soft);margin-bottom:18px;line-height:1.6}
.pilier-list{list-style:none;padding:0;border-top:1px solid var(--line-soft);padding-top:18px;font-size:13.5px;color:var(--text-soft);line-height:1.85}
.pilier-list li{padding-left:18px;position:relative}
.pilier-list li::before{content:'·';position:absolute;left:6px;color:var(--accent);font-weight:700;font-size:18px;line-height:1}

/* Démonstrateurs */
.demos{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:1000px;margin:0 auto}
.demo{padding:28px 24px;border:1px solid var(--line);border-radius:8px;background:var(--paper-warm)}
.demo h3{font-size:18px;margin-bottom:6px}
.demo .demo-objet{font-size:13px;color:var(--muted);font-style:italic;margin-bottom:14px}
.demo p{font-size:14px;color:var(--text-soft);line-height:1.6}

/* Téléchargements 3 niveaux */
.dl-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:1040px;margin:0 auto}
.dl{padding:32px 26px;border:1px solid var(--line);border-radius:10px;background:#fff;display:flex;flex-direction:column;position:relative}
.dl.featured{border-color:var(--ink);box-shadow:0 4px 24px rgba(30,58,95,.08)}
.dl.featured::before{content:'RECOMMANDÉ';position:absolute;top:-11px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-size:10.5px;font-weight:600;padding:4px 14px;border-radius:4px;letter-spacing:.14em}
.dl-niv{font-size:11.5px;color:var(--accent);font-weight:600;letter-spacing:.18em;text-transform:uppercase;margin-bottom:10px}
.dl-title{font-size:22px;margin-bottom:6px}
.dl-pages{font-size:14px;color:var(--muted);font-style:italic;margin-bottom:18px}
.dl-desc{font-size:14px;color:var(--text-soft);flex:1;margin-bottom:24px;line-height:1.6}
.dl-cta{display:flex;flex-direction:column;gap:8px}
.dl-btn{display:inline-flex;align-items:center;justify-content:center;padding:12px;border-radius:6px;font-size:13.5px;font-weight:600;border:1px solid var(--ink);color:var(--ink);text-decoration:none;transition:all .18s;background:#fff}
.dl-btn:hover{background:var(--ink);color:#fff}
.dl-btn.primary{background:var(--ink);color:#fff}
.dl-btn.primary:hover{background:var(--ink-soft);border-color:var(--ink-soft)}

/* Scores */
.scores{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;max-width:680px;margin:36px auto 0}
.score{padding:36px 28px;text-align:center;border:1px solid var(--line);border-radius:10px;background:#fff}
.score-num{font-family:'Source Serif Pro',serif;font-size:64px;font-weight:700;color:var(--ink);line-height:1;letter-spacing:-.02em}
.score-num small{font-size:24px;color:var(--muted);font-weight:400}
.score-label{font-size:13px;color:var(--text-soft);margin-top:8px;letter-spacing:.04em}
.scores-note{text-align:center;font-size:13.5px;color:var(--muted);font-style:italic;max-width:560px;margin:24px auto 0;line-height:1.6}

/* Appel */
.appel{background:var(--appel-bg);color:var(--appel-text);padding:110px 0;text-align:center}
.appel .sec-eyebrow{color:var(--accent-soft)}
.appel h2{color:var(--appel-text);font-size:clamp(28px,3.6vw,40px);margin-bottom:32px;max-width:720px;margin-left:auto;margin-right:auto}
.appel p{font-size:17px;color:var(--appel-text-soft);max-width:620px;margin:0 auto 20px;line-height:1.7}
.appel blockquote{font-family:'Source Serif Pro',serif;font-style:italic;font-size:22px;color:var(--accent-soft);max-width:560px;margin:40px auto 0;line-height:1.5}

/* Sous-pages */
.page-intro{max-width:760px;margin:0 auto 56px}
.page-intro p{font-size:16.5px;color:var(--text-soft);line-height:1.75;margin-bottom:18px}
.page-intro p:last-child{margin-bottom:0}

/* Embed PDF */
.pdf-embed{max-width:1000px;margin:0 auto;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--paper-cool);box-shadow:0 8px 32px rgba(30,58,95,.06)}
.pdf-embed iframe{display:block;width:100%;height:78vh;min-height:560px;border:none}
.pdf-fallback{padding:32px;text-align:center;font-size:14px;color:var(--text-soft)}
.pdf-toolbar{display:flex;justify-content:space-between;align-items:center;padding:16px 22px;background:#fff;border-bottom:1px solid var(--line);font-size:13.5px;color:var(--text-soft);gap:14px;flex-wrap:wrap}
.pdf-toolbar strong{color:var(--ink)}
.pdf-toolbar .pdf-actions{display:flex;gap:10px;flex-wrap:wrap}
.pdf-toolbar .btn-small{padding:8px 16px;font-size:12.5px}

/* Table conformite */
.docs-table{max-width:1000px;margin:0 auto;border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#fff}
.docs-row{display:grid;grid-template-columns:1fr 110px 140px;align-items:center;padding:18px 24px;border-bottom:1px solid var(--line-soft);gap:18px}
.docs-row:last-child{border-bottom:none}
.docs-row:hover{background:var(--paper-warm)}
.docs-row.master{background:var(--paper-warm);border-bottom:2px solid var(--ink)}
.docs-row .doc-title{font-family:'Source Serif Pro',serif;font-size:15.5px;color:var(--ink);font-weight:600}
.docs-row .doc-title small{display:block;font-family:'Inter',sans-serif;font-weight:400;font-size:13px;color:var(--text-soft);margin-top:4px;line-height:1.5}
.docs-row .doc-meta{font-size:12.5px;color:var(--muted);font-style:italic}
.docs-row .doc-btn{display:inline-flex;align-items:center;justify-content:center;padding:9px 14px;border:1px solid var(--ink);border-radius:6px;color:var(--ink);text-decoration:none;font-size:13px;font-weight:600;transition:all .18s;background:#fff}
.docs-row .doc-btn:hover{background:var(--ink);color:#fff}
.docs-row.master .doc-btn{background:var(--ink);color:#fff}
.docs-row.master .doc-btn:hover{background:var(--ink-soft);border-color:var(--ink-soft)}

/* Contact */
.contact-card{max-width:560px;margin:0 auto;padding:48px 36px;border:1px solid var(--line);border-radius:10px;background:#fff;text-align:center}
.contact-mail{display:inline-block;font-family:'Source Serif Pro',serif;font-size:28px;color:var(--ink);font-weight:600;margin:18px 0;padding:14px 28px;border:2px solid var(--ink);border-radius:8px;text-decoration:none}
.contact-mail:hover{background:var(--ink);color:#fff}
.contact-meta{font-size:14px;color:var(--text-soft);line-height:1.8;margin-top:28px}

/* Footer */
footer{padding:48px 0 36px;background:var(--paper-warm);font-size:13.5px;color:var(--text-soft)}
.ft{display:grid;grid-template-columns:2fr 1fr;gap:36px;max-width:1100px;margin:0 auto;padding:0 28px}
.ft h4{font-family:'Inter',sans-serif;font-size:11px;color:var(--muted);letter-spacing:.16em;text-transform:uppercase;font-weight:600;margin-bottom:14px}
.ft p{line-height:1.7;margin-bottom:6px}
.ft a{color:var(--text-soft);text-decoration:none}
.ft a:hover{color:var(--ink);text-decoration:underline}
.ft ul{list-style:none}
.ft ul li{margin-bottom:6px}
.ft-bottom{max-width:1100px;margin:36px auto 0;padding:24px 28px 0;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:14px;font-size:12.5px;color:var(--muted)}
.ft-bottom a{color:var(--muted);text-decoration:none}
.ft-bottom a:hover{color:var(--ink)}

/* Dark mode : overrides cartes & surfaces blanches */
[data-theme="dark"] .figure{background:var(--paper-warm);border-color:var(--line)}
[data-theme="dark"] .pilier{background:var(--paper-warm);border-color:var(--line)}
[data-theme="dark"] .demo{background:var(--paper-cool);border-color:var(--line)}
[data-theme="dark"] .dl{background:var(--paper-warm);border-color:var(--line)}
[data-theme="dark"] .dl.featured{box-shadow:0 4px 24px rgba(0,0,0,.4)}
[data-theme="dark"] .score{background:var(--paper-warm);border-color:var(--line)}
[data-theme="dark"] .docs-table{background:var(--paper-warm);border-color:var(--line)}
[data-theme="dark"] .docs-row{border-color:var(--line-soft)}
[data-theme="dark"] .docs-row.master{background:var(--paper-cool)}
[data-theme="dark"] .docs-row:hover{background:var(--paper-cool)}
[data-theme="dark"] .docs-row .doc-btn{background:transparent}
[data-theme="dark"] .docs-row .doc-btn:hover{background:var(--ink);color:var(--paper)}
[data-theme="dark"] .docs-row.master .doc-btn{background:var(--ink);color:var(--paper)}
[data-theme="dark"] .contact-card{background:var(--paper-warm);border-color:var(--line)}
[data-theme="dark"] .pdf-embed{background:var(--paper-cool);box-shadow:0 8px 32px rgba(0,0,0,.4)}
[data-theme="dark"] .pdf-toolbar{background:var(--paper-warm);border-color:var(--line)}
[data-theme="dark"] .dl-btn{background:transparent}
[data-theme="dark"] .dl-btn:hover{background:var(--ink);color:var(--paper)}
[data-theme="dark"] .dl-btn.primary{background:var(--ink);color:var(--paper)}
[data-theme="dark"] .btn{color:var(--paper)}
[data-theme="dark"] .btn-ghost{background:transparent;color:var(--ink-light)}
[data-theme="dark"] .btn-ghost:hover{background:var(--ink);color:var(--paper)}
[data-theme="dark"] .hero{background:linear-gradient(180deg,var(--paper-warm) 0%,var(--paper) 100%)}
[data-theme="dark"] .question{background:var(--paper-warm)}
[data-theme="dark"] .question blockquote{color:var(--heading)}
[data-theme="dark"] .hero-eyebrow{background:var(--paper-warm)}
[data-theme="dark"] .dl.featured::before{background:var(--ink-light);color:var(--paper)}
[data-theme="dark"] a{color:var(--ink-light)}
[data-theme="dark"] a:hover{color:var(--accent)}
[data-theme="dark"] .contact-mail{background:var(--paper-warm)}
[data-theme="dark"] .contact-mail:hover{background:var(--ink);color:var(--paper)}
[data-theme="dark"] .score-num{color:var(--ink-light)}

/* Responsive */
@media (max-width:880px){
  section{padding:64px 0}
  .figures{grid-template-columns:repeat(2,1fr)}
  .piliers,.demos,.dl-3{grid-template-columns:1fr}
  .scores{grid-template-columns:1fr;max-width:380px}
  .ft{grid-template-columns:1fr}
  .hdr-nav{gap:14px;font-size:13px}
  .hdr-nav a:not(.nav-cta){display:none}
  .docs-row{grid-template-columns:1fr;gap:8px}
  .docs-row .doc-meta{font-size:12px}
  .pdf-embed iframe{height:60vh;min-height:420px}
}
@media (max-width:520px){
  .hdr-mark{font-size:16px}
  .hdr-mark small{display:none}
  .hero{padding:84px 0 64px}
  .figures{grid-template-columns:1fr}
  .contact-mail{font-size:20px;padding:12px 18px}
}