:root{
  color-scheme: dark;
  --bg:#101827;
  --bg2:#152033;
  --card:rgba(255,255,255,.08);
  --card2:rgba(255,255,255,.13);
  --text:#f8fafc;
  --muted:#b8c2d6;
  --line:rgba(255,255,255,.16);
  --gold:#f5c56a;
  --shadow:0 22px 70px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:radial-gradient(circle at top left,#2a4d70 0,#101827 42%,#080b12 100%);color:var(--text)}
body:before{content:"";position:fixed;inset:0;background:linear-gradient(135deg,rgba(245,197,106,.08),transparent 35%,rgba(74,144,226,.12));pointer-events:none}
button,input{font:inherit}
.app-shell{width:min(1480px,96vw);margin:0 auto;padding:28px 0 34px;position:relative;z-index:1}
.hero{display:flex;justify-content:space-between;gap:18px;align-items:flex-end;margin-bottom:22px;padding:18px 18px 0}
.eyebrow{margin:0 0 6px;text-transform:uppercase;letter-spacing:.18em;color:var(--gold);font-weight:800;font-size:.78rem}
h1{margin:0;font-size:clamp(2.1rem,4.2vw,4.9rem);line-height:.96;letter-spacing:-.045em}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.reader-card{border:1px solid var(--line);background:linear-gradient(180deg,var(--card2),rgba(255,255,255,.055));border-radius:30px;box-shadow:var(--shadow);padding:18px;backdrop-filter:blur(18px)}
.book-stage{position:relative;display:grid;place-items:center;min-height:min(76vh,940px);overflow:hidden;border-radius:22px;background:radial-gradient(circle at center,rgba(255,255,255,.14),rgba(255,255,255,.04) 44%,rgba(0,0,0,.24));border:1px solid rgba(255,255,255,.08);padding:22px}
.book{filter:drop-shadow(0 28px 30px rgba(0,0,0,.42));isolation:isolate}
.page{background:#fff;overflow:hidden;border-radius:7px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.06)}
.page:after{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(0,0,0,.16),transparent 8%,transparent 92%,rgba(0,0,0,.18));mix-blend-mode:multiply;opacity:.45}
.page img{display:block;width:100%;height:100%;object-fit:cover;user-select:none;-webkit-user-drag:none;background:#fff}
.page-number{position:absolute;right:14px;bottom:10px;padding:4px 9px;border-radius:999px;background:rgba(15,23,42,.72);color:#fff;font-size:12px;letter-spacing:.04em;backdrop-filter:blur(8px)}
.nav-zone{position:absolute;top:0;bottom:0;width:17%;border:0;background:transparent;cursor:pointer;z-index:20;opacity:0}
.nav-left{left:0}.nav-right{right:0}
.controls{display:grid;grid-template-columns:auto minmax(180px,1fr) auto;gap:16px;align-items:center;margin-top:16px}
button{border:1px solid rgba(255,255,255,.18);background:linear-gradient(180deg,rgba(255,255,255,.18),rgba(255,255,255,.08));color:var(--text);border-radius:999px;padding:12px 18px;cursor:pointer;box-shadow:0 10px 24px rgba(0,0,0,.2);transition:transform .18s ease,background .18s ease,border-color .18s ease}
button:hover{transform:translateY(-1px);background:linear-gradient(180deg,rgba(255,255,255,.25),rgba(255,255,255,.12));border-color:rgba(245,197,106,.45)}
button:disabled{opacity:.42;cursor:not-allowed;transform:none}.ghost{padding:10px 14px;background:rgba(255,255,255,.08)}
.progress-wrap{display:grid;gap:7px;color:var(--muted);font-weight:700;text-align:center}
input[type="range"]{width:100%;accent-color:var(--gold);cursor:pointer}.hint{text-align:center;color:var(--muted);margin:12px 0 0;font-size:.92rem}

#bookMount{display:grid;place-items:center;width:100%;max-width:100%;overflow:visible;}
.stf__parent{margin:auto!important;max-width:100%!important;}
.stf__block{overflow:hidden;border-radius:8px;}
.stf__parent canvas{border-radius:8px;}
.stf__item.--soft{box-shadow:0 10px 24px rgba(0,0,0,.28)}
@media (max-width:780px){.app-shell{width:100%;padding:12px}.hero{align-items:flex-start;flex-direction:column;padding:8px 4px}.reader-card{border-radius:20px;padding:10px}.book-stage{min-height:70vh;padding:10px;border-radius:16px}.controls{grid-template-columns:1fr 1fr;gap:10px}.progress-wrap{grid-column:1/-1;grid-row:1}.hint{font-size:.82rem}.nav-zone{display:none}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}


/* Mode zoom lecture : idéal pour lire les fiches sur mobile, tablette ou écran d'ordinateur. */
.zoom-overlay{
  position:fixed;
  inset:0;
  z-index:9999;
  display:none;
  grid-template-rows:auto 1fr;
  background:rgba(7,11,19,.96);
  backdrop-filter:blur(14px);
}
.zoom-overlay.open{display:grid;}
.zoom-toolbar{
  display:flex;
  gap:10px;
  align-items:center;
  justify-content:center;
  flex-wrap:wrap;
  padding:12px;
  border-bottom:1px solid rgba(255,255,255,.14);
  background:linear-gradient(180deg,rgba(255,255,255,.12),rgba(255,255,255,.05));
}
.zoom-toolbar button{padding:10px 14px;min-width:48px;}
.zoom-toolbar span{color:var(--muted);font-weight:800;padding:0 4px;}
.zoom-close{border-color:rgba(245,197,106,.55);}
.zoom-viewer{
  position:relative;
  overflow:hidden;
  display:grid;
  place-items:center;
  touch-action:none;
  cursor:grab;
  padding:18px;
}
.zoom-viewer.dragging{cursor:grabbing;}
.zoom-viewer img{
  max-width:min(92vw,1050px);
  max-height:calc(100vh - 116px);
  width:auto;
  height:auto;
  user-select:none;
  -webkit-user-drag:none;
  transform-origin:center center;
  border-radius:12px;
  box-shadow:0 24px 70px rgba(0,0,0,.56),0 0 0 1px rgba(255,255,255,.12);
  background:#fff;
}
.book-stage.zoom-hint:after{
  content:"Double-cliquez pour zoomer";
  position:absolute;
  bottom:18px;
  left:50%;
  transform:translateX(-50%);
  padding:8px 13px;
  border-radius:999px;
  background:rgba(15,23,42,.72);
  color:#fff;
  font-weight:800;
  font-size:.82rem;
  opacity:0;
  pointer-events:none;
  transition:opacity .18s ease;
}
.book-stage:hover.zoom-hint:after{opacity:1;}
@media (max-width:780px){
  .zoom-toolbar{justify-content:space-between;gap:7px;padding:8px;}
  .zoom-toolbar button{padding:9px 11px;min-width:42px;font-size:.92rem;}
  .zoom-toolbar span{order:10;width:100%;text-align:center;font-size:.88rem;}
  .zoom-viewer{padding:8px;}
  .zoom-viewer img{max-width:96vw;max-height:calc(100vh - 132px);border-radius:8px;}
}