/* ============================================================
   Manuel interactif · Histoire du Québec et du Canada (Sec. 3)
   Visuel repris du Portail US : Playfair Display + Inter,
   noir / blanc, filets épais, accents de couleur par chapitre.
   ============================================================ */
:root{
  --hec:#185FA5; --geo:#1D6B7A; --hqc:#2E6B3E; --h20:#7A3B10; --gcult:#6B4A8A; --mc:#8A4A2E; --ef:#2E6B5A;
  --noir:#000; --blanc:#fff; --gris-clair:#F5F5F5; --gris:#555;
  --parch:#F6EFDD; --parch-bord:#D9C9A0; --encre:#3b2f1a;
  --accent:var(--hqc); --accent-pale:#EAF5EE;
  --serif:'Playfair Display',Georgia,serif; --sans:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{font-family:var(--sans);background:var(--blanc);color:var(--noir);overflow-x:hidden;line-height:1.6}
a{color:inherit}
img,svg{max-width:100%}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}

/* Thèmes par chapitre */
.ch1{--accent:#1D6B7A;--accent-pale:#EBF6F8}
.ch2{--accent:#185FA5;--accent-pale:#EEF5FF}
.ch3{--accent:#7A3B10;--accent-pale:#FFF3EE}
.ch4{--accent:#6B4A8A;--accent-pale:#F2F0FE}

/* ---------- Barre supérieure ---------- */
.barre-top{position:fixed;top:0;left:0;right:0;height:6px;z-index:100;
  background:linear-gradient(90deg,var(--hec) 0 14.28%,var(--geo) 14.28% 28.57%,var(--hqc) 28.57% 42.85%,var(--h20) 42.85% 57.14%,var(--gcult) 57.14% 71.42%,var(--mc) 71.42% 85.71%,var(--ef) 85.71% 100%)}
.barre-progress{position:fixed;top:6px;left:0;height:4px;width:0;background:var(--accent);z-index:100;transition:width .15s linear}
.topbar{position:sticky;top:10px;z-index:60;background:rgba(255,255,255,.96);backdrop-filter:blur(6px);border-bottom:3px solid var(--noir);
  display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 24px;margin-top:10px}
.topbar .marque{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:12px;letter-spacing:.2em;text-transform:uppercase}
.topbar .marque b{background:var(--noir);color:#fff;padding:6px 10px;letter-spacing:.15em}
.topbar nav{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.topbar nav a,.topbar .btn-side{font-size:12px;font-weight:700;text-decoration:none;padding:7px 12px;border:2px solid var(--noir);background:#fff;transition:.2s}
.topbar nav a:hover,.topbar nav a[aria-current="page"],.topbar .btn-side:hover{background:var(--noir);color:#fff}
.topbar .btn-side{display:none}

/* ---------- Héros de chapitre ---------- */
.hero{position:relative;min-height:78vh;display:flex;flex-direction:column;justify-content:flex-end;padding:0 5rem 5rem;border-bottom:3px solid var(--noir);overflow:hidden}
.hero .bg-letters{position:absolute;right:-2vw;top:50%;transform:translateY(-50%);font-family:var(--serif);font-weight:900;font-size:36vw;line-height:.9;color:transparent;-webkit-text-stroke:1px rgba(0,0,0,.05);pointer-events:none;user-select:none;letter-spacing:-.05em}
.hero-tag{display:inline-flex;align-items:center;gap:10px;background:var(--noir);color:#fff;padding:12px 24px;font-size:13px;font-weight:800;letter-spacing:.22em;text-transform:uppercase;margin-bottom:2.2rem;width:fit-content;position:relative}
.hero-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 0 var(--accent);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.6);opacity:.6}}
.hero h1{font-family:var(--serif);font-weight:900;font-size:clamp(2.6rem,6.2vw,6rem);line-height:1.05;letter-spacing:-.03em;margin-bottom:2rem;position:relative;max-width:1100px}
.hero h1 em{font-style:italic;color:var(--accent)}
.hero .question{font-size:19px;color:#333;max-width:760px;line-height:1.75;position:relative;border-left:5px solid var(--accent);padding-left:1.2rem}
.hero .meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:2rem;position:relative}
.pill{font-size:12px;font-weight:700;padding:6px 14px;border-radius:20px;background:var(--accent-pale);color:var(--accent);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent)}
.pill.plein{background:var(--accent);color:#fff;border-color:var(--accent)}

/* ---------- Mise en page ---------- */
.layout{display:grid;grid-template-columns:300px minmax(0,1fr);max-width:1400px;margin:0 auto;align-items:start}
.sidebar{position:sticky;top:76px;max-height:calc(100vh - 90px);overflow:auto;padding:2rem 1.5rem 2rem 2.5rem;border-right:3px solid var(--noir);background:#fff}
.sidebar h2{font-size:10px;font-weight:800;letter-spacing:.3em;text-transform:uppercase;color:#888;margin-bottom:1rem}
.sidebar ol{list-style:none;counter-reset:s}
.sidebar li{counter-increment:s}
.sidebar a{display:flex;gap:10px;align-items:flex-start;text-decoration:none;font-size:14px;font-weight:600;color:#333;padding:8px 10px;border-left:4px solid transparent;transition:.2s;line-height:1.35}
.sidebar a::before{content:counter(s,decimal-leading-zero);font-size:11px;font-weight:800;color:#999;padding-top:2px;min-width:20px}
.sidebar a:hover{background:var(--gris-clair)}
.sidebar a.actif{border-left-color:var(--accent);background:var(--accent-pale);color:#000}
.sidebar a.lu::after{content:"✓";margin-left:auto;color:var(--accent);font-weight:900}
.prog-box{margin-bottom:1.6rem}
.prog-box .lbl{display:flex;justify-content:space-between;font-size:11px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;margin-bottom:6px}
.prog-bar{height:8px;background:#e8e8e8;border:2px solid var(--noir)}
.prog-bar i{display:block;height:100%;width:0;background:var(--accent);transition:width .4s}
.contenu{padding:4rem 5rem 2rem;min-width:0}
.scrim{display:none}

/* ---------- Sections ---------- */
.sec{margin-bottom:5.5rem}
.sec-head{display:flex;align-items:baseline;gap:1.2rem;margin-bottom:1.6rem;border-bottom:3px solid var(--noir);padding-bottom:1rem;flex-wrap:wrap}
.sec-head .num{font-size:12px;font-weight:800;letter-spacing:.2em;color:#aaa;text-transform:uppercase}
.sec-head h2{font-family:var(--serif);font-weight:900;font-size:clamp(1.8rem,3.4vw,2.8rem);letter-spacing:-.02em;line-height:1.1}
.sec h3{font-family:var(--serif);font-size:1.5rem;font-weight:900;margin:2.2rem 0 .8rem;letter-spacing:-.01em}
.sec p{font-size:17px;line-height:1.85;color:#222;margin-bottom:1.1rem;max-width:760px}
.sec ul,.sec ol.liste{margin:0 0 1.2rem 1.3rem;max-width:760px}
.sec li{font-size:17px;line-height:1.8;margin-bottom:.35rem;color:#222}
.sec strong{font-weight:700}
.lead{font-size:19px!important;color:#333!important}

.callout{background:var(--accent-pale);border:2px solid var(--noir);border-left:10px solid var(--accent);padding:1.3rem 1.5rem;margin:1.8rem 0;max-width:760px}
.callout .t{font-size:11px;font-weight:800;letter-spacing:.25em;text-transform:uppercase;color:var(--accent);display:block;margin-bottom:.4rem}
.callout p{margin:0;font-size:16px}

/* Document source (parchemin) */
.doc{background:var(--parch);border:2px solid var(--parch-bord);box-shadow:6px 6px 0 var(--noir);margin:2.2rem 0;max-width:780px;position:relative}
.doc-head{display:flex;gap:10px;align-items:center;background:var(--noir);color:#fff;padding:9px 16px;font-size:11px;font-weight:800;letter-spacing:.22em;text-transform:uppercase}
.doc-body{padding:1.4rem 1.6rem}
.doc-body blockquote{font-family:var(--serif);font-style:italic;font-size:17px;line-height:1.8;color:var(--encre);border-left:4px solid var(--accent);padding-left:1rem;margin:0 0 .8rem}
.doc-body .ref{font-size:12.5px;color:#6b5a37;margin-bottom:1rem;font-weight:500}
.doc-body p{font-size:15.5px;color:var(--encre)}
.doc-q{border-top:2px dashed var(--parch-bord);padding-top:1rem;margin-top:1rem}
.doc-q .qt{font-size:11px;font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);margin-bottom:.4rem}
.doc-q ol{margin-left:1.2rem}
.doc-q li{font-size:15.5px;color:var(--encre)}
details.piste{margin-top:.9rem}
details.piste summary{display:inline-block;list-style:none;cursor:pointer;font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;padding:8px 14px;border:2px solid var(--noir);background:#fff;transition:.2s}
details.piste summary::-webkit-details-marker{display:none}
details.piste summary:hover,details.piste[open] summary{background:var(--noir);color:#fff}
details.piste .rep{margin-top:.8rem;padding:1rem 1.2rem;background:#fff;border-left:5px solid var(--accent);font-size:15.5px;color:#222}
details.piste .rep p{font-size:15.5px;margin:0 0 .5rem}

/* Défi */
.defi{border:3px solid var(--noir);background:#fff;margin:2.2rem 0;max-width:780px}
.defi-head{background:var(--accent);color:#fff;padding:9px 16px;font-size:11px;font-weight:800;letter-spacing:.22em;text-transform:uppercase}
.defi-body{padding:1.3rem 1.6rem}
.defi-body p{font-size:16.5px}

/* Accordéons */
.acc-group{margin:1.8rem 0;max-width:780px;border:3px solid var(--noir)}
details.acc{border-bottom:2px solid var(--noir);background:#fff}
details.acc:last-child{border-bottom:0}
details.acc summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:1rem 1.3rem;font-weight:700;font-size:16.5px;transition:background .2s}
details.acc summary::-webkit-details-marker{display:none}
details.acc summary::after{content:"+";font-family:var(--serif);font-size:1.7rem;font-weight:900;line-height:1;transition:transform .3s}
details.acc[open] summary{background:var(--accent-pale)}
details.acc[open] summary::after{transform:rotate(45deg)}
details.acc summary:hover{background:var(--gris-clair)}
details.acc .acc-body{padding:.4rem 1.3rem 1.2rem}
details.acc .acc-body p,details.acc .acc-body li{font-size:16px}

/* Tableaux */
.table-wrap{overflow-x:auto;margin:1.6rem 0;border:3px solid var(--noir);max-width:100%}
table.tab{border-collapse:collapse;width:100%;min-width:560px;font-size:15px}
table.tab th{background:var(--noir);color:#fff;text-align:left;padding:10px 14px;font-size:11px;letter-spacing:.15em;text-transform:uppercase}
table.tab td{padding:10px 14px;border-top:1.5px solid #ddd;vertical-align:top;background:#fff}
table.tab tr:nth-child(even) td{background:#fafafa}
table.tab td:first-child{font-weight:700}

/* Cartes d'information */
.cartes{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:18px;margin:1.8rem 0}
.mini{border:2px solid var(--noir);background:#fff;padding:1.3rem 1.2rem;transition:.3s;position:relative}
.mini:hover{transform:translateY(-4px);box-shadow:6px 6px 0 var(--noir)}
.mini::before{content:"";position:absolute;top:0;left:0;right:0;height:5px;background:var(--accent)}
.mini h4{font-family:var(--serif);font-size:1.15rem;font-weight:900;margin:.3rem 0 .5rem}
.mini p{font-size:14.5px!important;line-height:1.65!important;margin:0!important;color:#444!important}
.mini .k{font-size:10px;font-weight:800;letter-spacing:.25em;text-transform:uppercase;color:var(--accent)}

/* Outils interactifs : cadre commun */
.outil{border:3px solid var(--noir);background:#fff;margin:1.5rem 0;max-width:100%}
.outil-head{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;background:var(--noir);color:#fff;padding:10px 18px;font-size:11px;font-weight:800;letter-spacing:.22em;text-transform:uppercase}
.outil-head .aide{font-weight:500;letter-spacing:.04em;text-transform:none;font-size:12.5px;opacity:.8}
.outil-body{padding:1.4rem}

/* Ligne du temps */
.tl-scroll{overflow-x:auto;padding:1.6rem 0 1rem;margin:0 -.4rem}
.tl-track{display:flex;min-width:max-content;position:relative;padding:0 .8rem}
.tl-track::before{content:"";position:absolute;left:0;right:0;top:46px;height:4px;background:var(--noir)}
.tl-item{flex:0 0 auto;width:132px;text-align:center;position:relative;background:none;border:0;padding:0 4px}
.tl-item .an{display:block;font-family:var(--serif);font-weight:900;font-size:1.05rem;margin-bottom:12px;height:24px;white-space:nowrap}
.tl-item .pt{display:block;width:22px;height:22px;border-radius:50%;background:#fff;border:4px solid var(--noir);margin:0 auto 12px;position:relative;z-index:1;transition:.25s}
.tl-item .lb{display:block;font-size:12.5px;font-weight:600;line-height:1.35;color:#333}
.tl-item:hover .pt{background:var(--accent);transform:scale(1.25)}
.tl-item.actif .pt{background:var(--accent);border-color:var(--accent);transform:scale(1.35);box-shadow:0 0 0 6px var(--accent-pale)}
.tl-item.actif .lb{color:#000;font-weight:800}
.tl-panel{border-top:3px solid var(--noir);margin-top:.8rem;padding:1.3rem .4rem .2rem;min-height:120px}
.tl-panel .vide{color:#777;font-style:italic;font-size:15.5px}
.tl-panel h4{font-family:var(--serif);font-size:1.4rem;font-weight:900;margin-bottom:.2rem}
.tl-panel .quand{font-size:11px;font-weight:800;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);margin-bottom:.6rem;display:block}
.tl-panel p{font-size:16.5px;max-width:760px;margin:0}
.tl-ctrl{display:flex;gap:8px;margin-top:1rem}
.btn{font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;padding:9px 16px;border:2px solid var(--noir);background:#fff;transition:.2s}
.btn:hover:not(:disabled){background:var(--noir);color:#fff}
.btn:disabled{opacity:.35;cursor:not-allowed}
.btn.plein{background:var(--noir);color:#fff}
.btn.plein:hover{background:var(--accent);border-color:var(--accent)}

/* Figures (images historiques) */
.fig{margin:2rem 0;max-width:820px}
.fig a.zoom{display:block;border:2px solid var(--noir);background:#f3efe6;cursor:zoom-in}
.fig img{display:block;width:100%;height:auto;max-height:560px;object-fit:contain}
.fig figcaption{margin-top:.6rem;font-size:14.5px;line-height:1.5;border-left:4px solid var(--accent);padding-left:.8rem}
.fig figcaption b{display:block;font-family:var(--serif);font-size:1.05rem;font-weight:900}
.fig .credit{display:block;margin-top:.25rem;font-size:12px;color:#666}
.fig .credit a{color:#666}
.fig-duo{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:2rem 0;max-width:820px}
.fig-duo .fig{margin:0}
.fig-duo .fig img{height:260px;max-height:none;object-fit:contain}
@media (max-width:640px){.fig-duo{grid-template-columns:1fr}.fig-duo .fig img{height:auto}}
/* Graphiques */
.graph{border:2px solid var(--noir);padding:1.1rem 1.2rem;margin:2rem 0;max-width:820px;background:#fff}
.g-titre{font-family:var(--serif);font-weight:900;font-size:1.15rem;margin-bottom:.9rem}
.g-barres,.g-duo{display:grid;grid-template-columns:minmax(110px,auto) 1fr;gap:8px 12px;align-items:center}
.g-l{font-size:13.5px;font-weight:700;text-align:right}
.g-b{display:flex;align-items:center;gap:8px;height:22px}
.g-b span{display:block;height:100%;background:var(--accent);min-width:3px}
.g-b em{font-style:normal;font-size:12.5px;font-weight:700;white-space:nowrap}
.g-duo .g-b{height:17px;margin:2px 0}
.g-duo .g-b.b span{background:#8a8a8a}
.g-cols{display:flex;align-items:flex-end;gap:10px;height:230px;padding-top:20px;border-bottom:2px solid var(--noir)}
.g-col{flex:1;display:flex;flex-direction:column;justify-content:flex-end;align-items:center;height:100%;position:relative}
.g-col span{display:block;width:70%;max-width:70px;background:var(--accent)}
.g-col em{font-style:normal;font-size:12px;font-weight:700;margin-bottom:4px;white-space:nowrap}
.g-col b{position:absolute;bottom:-1.6rem;font-size:12.5px}
.graph .g-cols+p.g-src,.graph .g-cols+p.g-note{margin-top:2rem}
.g-leg{display:flex;flex-wrap:wrap;gap:14px;font-size:12.5px;font-weight:700;margin:.2rem 0 .8rem}
.g-leg span::before{content:"";display:inline-block;width:12px;height:12px;margin-right:6px;vertical-align:-1px;background:var(--accent)}
.g-leg .b::before,.g-leg .p1::before{background:#8a8a8a}
.g-parts{display:flex;height:38px;border:2px solid var(--noir);margin-bottom:.6rem}
.g-parts span{display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:13px}
.g-parts .p0{background:var(--accent)}.g-parts .p1{background:#8a8a8a}
.graph p.g-src,.graph p.g-note{font-size:12px;color:#666;margin:.8rem 0 0;font-style:italic;max-width:none}

/* Schéma conceptuel */
.schema{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;align-items:stretch}
.schema .centre{grid-column:2;grid-row:2;background:var(--noir);color:#fff;display:flex;align-items:center;justify-content:center;text-align:center;padding:1rem;font-family:var(--serif);font-weight:900;font-size:1.15rem;line-height:1.25;border:3px solid var(--noir)}
.sch-noeud{border:2px solid var(--noir);background:#fff;padding:.9rem .8rem;text-align:center;font-weight:700;font-size:14.5px;line-height:1.3;transition:.2s}
.sch-noeud:hover{background:var(--accent-pale);transform:translateY(-3px)}
.sch-noeud.actif{background:var(--accent);color:#fff;border-color:var(--accent)}
.sch-noeud small{display:block;font-size:10px;letter-spacing:.2em;text-transform:uppercase;opacity:.7;margin-bottom:4px}
.detail{margin-top:1.2rem;border-left:6px solid var(--accent);background:var(--accent-pale);padding:1.1rem 1.4rem;min-height:84px}
.detail h4{font-family:var(--serif);font-size:1.25rem;font-weight:900;margin-bottom:.4rem}
.detail p{font-size:16px;margin:0;max-width:none}
.detail .vide{color:#666;font-style:italic}

/* Schéma conceptuel */
.outil-head .sc-rev{background:#fff;color:var(--noir);padding:6px 12px;font-size:11px}
.sc-titre{font-family:var(--serif);font-weight:900;font-size:1.5rem;text-align:center;line-height:1.2}
.sc-q{margin:1rem auto 1.4rem;max-width:720px;text-align:center;border:2px solid var(--accent);border-radius:999px;padding:1rem 2rem;font-weight:700;font-size:15.5px;background:var(--accent-pale)}
.sc-periode{display:flex;align-items:center;gap:12px;margin:1.6rem 0 1rem;font-family:var(--serif);font-weight:900;font-size:1.35rem}
.sc-periode::before,.sc-periode::after{content:"";flex:1;border-top:3px solid var(--noir)}
.sc-blocs{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;align-items:start;margin-bottom:18px}
.sc-bloc{display:flex;flex-direction:column}
.sc-bloc-t{background:var(--accent);color:#fff;border-radius:10px;padding:.8rem 1rem;text-align:center;font-weight:800;font-size:15.5px;line-height:1.25;margin-bottom:10px}
.sc-bloc-t small{display:block;font-size:10.5px;letter-spacing:.15em;text-transform:uppercase;font-weight:700;opacity:.85;margin-top:4px}
.sc-case{border:2px solid var(--noir);background:#fff;padding:.7rem .9rem;margin-bottom:10px}
.sc-case h5{font-size:14px;font-weight:800;text-align:center;margin-bottom:.35rem;line-height:1.3}
.sc-case ul{margin:0;padding-left:1.1rem;font-size:13.5px;line-height:1.45}
.sc-case li{margin:.15rem 0}
.sc-fleche{text-align:center;margin:-4px 0 6px;font-size:12px;font-style:italic;color:var(--accent);font-weight:700}
.sc-fleche::before{content:"↓";display:block;font-style:normal;font-size:16px;line-height:1}
.sc-fleche span{display:block}
.sc-fleche::after{content:"↓";display:block;font-style:normal;font-size:16px;line-height:1}
.sc-lien{border:2px dashed var(--accent);color:var(--accent);font-weight:700;font-size:12.5px;text-align:center;padding:.5rem;border-radius:8px}
.sc-lien::before{content:"➜ "}
.sc-wrap.revision .sc-case{cursor:pointer}
.sc-wrap.revision .sc-case ul{visibility:hidden;height:0;overflow:hidden}
.sc-wrap.revision .sc-case h5::after{content:" ＋";color:var(--accent)}
.sc-wrap.revision .sc-case.ouvert ul{visibility:visible;height:auto}
.sc-wrap.revision .sc-case.ouvert h5::after{content:" −"}
@media (max-width:640px){.sc-q{border-radius:18px;padding:.9rem 1rem}}

/* Carte cliquable */
.carte-svg{background:#dfeaf0;border:2px solid var(--noir);width:100%;display:block}
.carte-svg .zone{fill:#e9dcb8;stroke:#4a3d1f;stroke-width:1.6;cursor:pointer;transition:fill .2s}
.carte-svg .zone:hover,.carte-svg .zone:focus{fill:#d9b86a;outline:none}
.carte-svg .zone.actif{fill:var(--accent);stroke:#000}
.carte-svg .zone.eau{fill:#bcd5e3;stroke:#5b8aa6}
.carte-svg text{font-family:var(--sans);font-size:13px;font-weight:700;fill:#2b2410;pointer-events:none;text-anchor:middle}
.carte-svg .zone.actif + text,.carte-svg .zone.actif ~ text.sur{fill:#fff}
.carte-note{font-size:12.5px;color:#666;margin-top:.5rem;font-style:italic}
.legende{display:flex;flex-wrap:wrap;gap:8px;margin-top:.9rem}
.legende button{font-size:12.5px;font-weight:700;padding:6px 12px;border:2px solid var(--noir);background:#fff}
.legende button:hover,.legende button.actif{background:var(--accent);color:#fff;border-color:var(--accent)}

.atlas-choix{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:1rem}
.atlas-choix button{font-size:12.5px;font-weight:700;padding:6px 12px;border:2px solid var(--noir);background:#fff;text-align:left}
.atlas-choix button:hover,.atlas-choix button.actif{background:var(--accent);color:#fff;border-color:var(--accent)}
.atlas-intro{margin-bottom:.9rem}
.atlas-intro h4{font-family:var(--serif);font-size:1.3rem;font-weight:900;margin-bottom:.2rem}
.atlas-intro p{font-size:15px;margin:0 0 .3rem;max-width:none}
.atlas-lien{font-size:12.5px;font-weight:700}
.atlas-carte{position:relative;border:2px solid var(--noir);background:#fff}
.atlas-img{display:block;width:100%;height:auto;aspect-ratio:1800/1164}
.atlas-pt{position:absolute;transform:translate(-50%,-50%);width:26px;height:26px;border-radius:50%;border:2px solid #fff;background:var(--noir);color:#fff;font-size:12px;font-weight:800;line-height:1;padding:0;box-shadow:0 1px 4px rgba(0,0,0,.45);transition:transform .15s,background .15s}
.atlas-pt:hover,.atlas-pt:focus-visible{transform:translate(-50%,-50%) scale(1.2)}
.atlas-pt.actif{background:var(--accent);transform:translate(-50%,-50%) scale(1.3);z-index:2}
@media (max-width:640px){.atlas-pt{width:20px;height:20px;font-size:10px;border-width:1.5px}}

/* Glossaire / cartes-éclairs */
.gl-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:1.2rem;align-items:center}
.gl-bar input{flex:1 1 220px;min-width:0;padding:10px 14px;border:2px solid var(--noir);font:inherit;font-size:15px}
.flashgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px}
.flash{display:block;width:100%;perspective:900px;height:190px;background:none;border:0;padding:0;text-align:left}
.flash-in{display:block;position:relative;width:100%;height:100%;transition:transform .55s cubic-bezier(.16,1,.3,1);transform-style:preserve-3d}
.flash.retourne .flash-in{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;border:2px solid var(--noir);padding:1rem;display:flex;flex-direction:column;justify-content:center;overflow:auto}
.face.av{background:#fff;align-items:center;text-align:center}
.face.av b{font-family:var(--serif);font-size:1.25rem;font-weight:900;line-height:1.2}
.face.av small{margin-top:8px;font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--accent);font-weight:800}
.face.ar{background:var(--accent);color:#fff;transform:rotateY(180deg);font-size:13.5px;line-height:1.5;justify-content:flex-start}
.face.ar b{display:block;font-size:11px;letter-spacing:.2em;text-transform:uppercase;margin-bottom:6px;opacity:.85}

/* Infobulle */
.gl{border-bottom:2px dotted var(--accent);cursor:help;font-weight:600;background:linear-gradient(transparent 60%,color-mix(in srgb,var(--accent) 14%,transparent) 60%)}
.gl:focus{outline:2px solid var(--accent)}
#tip{position:fixed;z-index:200;max-width:300px;background:var(--noir);color:#fff;padding:.8rem 1rem;font-size:13.5px;line-height:1.5;box-shadow:5px 5px 0 var(--accent);opacity:0;pointer-events:none;transform:translateY(6px);transition:opacity .15s,transform .15s}
#tip.on{opacity:1;transform:none}
#tip b{display:block;font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:#bbb;margin-bottom:3px}

/* Quiz */
.q{border:2px solid var(--noir);margin-bottom:18px;background:#fff}
.q-head{display:flex;gap:12px;padding:1rem 1.2rem;border-bottom:2px solid var(--noir);background:var(--gris-clair)}
.q-num{flex:0 0 auto;width:34px;height:34px;border-radius:50%;background:var(--noir);color:#fff;font-family:var(--serif);font-weight:900;display:flex;align-items:center;justify-content:center}
.q-txt{font-weight:700;font-size:16.5px;line-height:1.45}
.q-txt small{display:block;font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);margin-bottom:3px}
.q-opts{display:grid;gap:8px;padding:1rem 1.2rem}
.q-opt{text-align:left;font-size:15.5px;padding:11px 14px;border:2px solid var(--noir);background:#fff;transition:.15s;line-height:1.4}
.q-opt:hover:not(:disabled){background:var(--accent-pale);transform:translateX(4px)}
.q-opt:disabled{cursor:default}
.q-opt.bon{background:#DFF3E4;border-color:#1f7a3a;font-weight:700}
.q-opt.mauvais{background:#FBE3E0;border-color:#b3261e}
.q-fb{display:none;padding:.9rem 1.2rem 1.1rem;border-top:2px dashed #ccc;font-size:15px;line-height:1.6}
.q-fb.on{display:block}
.q-fb b.ok{color:#1f7a3a}.q-fb b.ko{color:#b3261e}
.score{display:none;border:3px solid var(--noir);background:var(--accent-pale);padding:1.6rem;text-align:center;margin-top:1rem}
.score.on{display:block}
.score .gros{font-family:var(--serif);font-weight:900;font-size:3rem;line-height:1}
.score p{margin:.6rem auto 1rem!important;font-size:16px!important}

/* Navigation chapitres */
.pager{display:grid;grid-template-columns:1fr 1fr;border:3px solid var(--noir);margin:3rem 0 1rem}
.pager a{padding:2rem;text-decoration:none;transition:.3s;display:block}
.pager a+a{border-left:3px solid var(--noir);text-align:right}
.pager a:hover{background:var(--noir);color:#fff}
.pager small{display:block;font-size:10px;font-weight:800;letter-spacing:.3em;text-transform:uppercase;color:#888;margin-bottom:6px}
.pager a:hover small{color:#bbb}
.pager b{font-family:var(--serif);font-size:1.3rem;font-weight:900}
.pager .vide{opacity:.35;pointer-events:none}

footer.pied{border-top:3px solid var(--noir);padding:2.2rem 5rem;display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap}
footer.pied .g{font-size:12px;font-weight:600;color:#888;letter-spacing:.05em;max-width:760px}
footer.pied .badge{background:var(--noir);color:#fff;font-size:10px;font-weight:800;letter-spacing:.2em;padding:8px 18px}

/* Révélation au défilement */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s ease,transform .8s cubic-bezier(.16,1,.3,1)}
.reveal.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}html{scroll-behavior:auto}}

/* ---------- Responsive ---------- */
@media (max-width:1100px){
  .layout{grid-template-columns:1fr}
  .sidebar{position:fixed;left:0;top:0;bottom:0;width:min(320px,86vw);max-height:none;z-index:150;transform:translateX(-102%);transition:transform .35s cubic-bezier(.16,1,.3,1);padding-top:3rem;box-shadow:8px 0 0 rgba(0,0,0,.15)}
  body.side-open .sidebar{transform:none}
  body.side-open .scrim{display:block;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:140}
  .topbar .btn-side{display:inline-block}
  .contenu{padding:3rem 2.5rem 1rem}
  .hero{padding:0 2.5rem 4rem}
  footer.pied{padding:2rem 2.5rem}
}
@media (max-width:700px){
  .topbar{padding:8px 16px}
  .topbar nav a.opt{display:none}
  .hero{padding:0 16px 3rem;min-height:70vh}
  .contenu{padding:2.2rem 16px 1rem}
  .hero .question{font-size:17px}
  .schema{grid-template-columns:1fr 1fr}
  .schema .centre{grid-column:1/-1;grid-row:auto;order:-1}
  .pager{grid-template-columns:1fr}
  .pager a+a{border-left:0;border-top:3px solid var(--noir);text-align:left}
  footer.pied{padding:1.6rem 16px;flex-direction:column;text-align:center}
  .outil-body{padding:1rem}
  .doc{box-shadow:4px 4px 0 var(--noir)}
}
@media print{.topbar,.sidebar,.barre-top,.barre-progress,.pager,.btn-side{display:none!important}.layout{display:block}details>*{display:block!important}.reveal{opacity:1!important;transform:none!important}}