/* =========================================================
   BOOK MENU — Salon Sophie
   "Le Carnet" : le menu de navigation prend la forme d'une
   vieille porte en bois avec une poignée, qui s'ouvre pour
   révéler un carnet dont on tourne les pages.
   ========================================================= */

:root{
  --wood-1:#5b3a26;
  --wood-2:#3f2717;
  --wood-3:#71482f;
  --brass:#c6a15b;
  --brass-dark:#8a6825;
  --paper:#fbf5ee;
  --paper-shadow:#e7dacb;
}

.book-menu-overlay{
  position:fixed;
  inset:0;
  z-index:2000;
  display:flex;
  align-items:center;
  justify-content:center;
  visibility:hidden;
  opacity:0;
  transition:opacity .35s ease, visibility 0s linear .35s;
}
.book-menu-overlay.open{
  visibility:visible;
  opacity:1;
  transition:opacity .35s ease;
}
.book-menu-backdrop{
  position:absolute;
  inset:0;
  background:rgba(20,13,8,.72);
  backdrop-filter:blur(3px);
}
.book-menu-close{
  position:absolute;
  top:18px;
  right:18px;
  z-index:20;
  width:42px;
  height:42px;
  border-radius:50%;
  border:1px solid rgba(255,255,255,.35);
  background:rgba(0,0,0,.25);
  color:#fff;
  font-size:22px;
  line-height:1;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
}
.book-menu-close:hover{ background:rgba(0,0,0,.45); }

.book-menu-stage{
  position:relative;
  width:min(90vw, 400px);
  height:min(82vh, 620px);
  perspective:2200px;
}

/* ---------------- LA PORTE ---------------- */
.book-door{
  position:absolute;
  inset:0;
  z-index:10;
  transform-style:preserve-3d;
  transform-origin:left center;
  transform:rotateY(0deg);
  transition:transform 1s cubic-bezier(.4,0,.2,1);
  cursor:pointer;
}
.book-door.opened{
  transform:rotateY(-112deg);
  pointer-events:none;
}
.book-door-panel{
  position:absolute;
  inset:0;
  border-radius:8px;
  background:
    repeating-linear-gradient(90deg,
      var(--wood-3) 0px, var(--wood-1) 34px, var(--wood-2) 38px, var(--wood-1) 42px, var(--wood-3) 76px);
  box-shadow:0 30px 70px -20px rgba(0,0,0,.7), inset 0 0 0 10px var(--wood-2), inset 0 0 40px rgba(0,0,0,.5);
  overflow:hidden;
}
.book-door-panel::before{ /* cadre supérieur sculpté */
  content:'';
  position:absolute;
  left:14px; right:14px; top:10%;
  height:34%;
  border:5px solid var(--wood-2);
  border-radius:6px;
  box-shadow:inset 0 0 18px rgba(0,0,0,.55), 0 2px 0 rgba(255,255,255,.06);
}
.book-door-panel::after{ /* cadre inférieur sculpté */
  content:'';
  position:absolute;
  left:14px; right:14px; top:48%;
  height:42%;
  border:5px solid var(--wood-2);
  border-radius:6px;
  box-shadow:inset 0 0 18px rgba(0,0,0,.55), 0 2px 0 rgba(255,255,255,.06);
}
.book-door-hinges{ position:absolute; left:6px; width:16px; height:34px; background:linear-gradient(90deg,var(--brass-dark),var(--brass)); border-radius:3px; box-shadow:0 0 6px rgba(0,0,0,.5); z-index:2; }
.book-door-hinges.h1{ top:9%; }
.book-door-hinges.h2{ bottom:9%; }
.book-door-handle{
  position:absolute;
  right:13%;
  top:50%;
  transform:translateY(-50%);
  width:52px;
  height:52px;
  z-index:3;
}
.book-door-handle::before{ /* anneau */
  content:'';
  position:absolute;
  inset:0;
  border-radius:50%;
  border:7px solid var(--brass);
  box-shadow:0 3px 10px rgba(0,0,0,.6), inset 0 0 6px rgba(0,0,0,.4);
  background:radial-gradient(circle at 35% 30%, #e9cf94, var(--brass) 60%, var(--brass-dark) 100%);
}
.book-door-handle::after{ /* plaque de fixation */
  content:'';
  position:absolute;
  right:-10px;
  top:50%;
  transform:translateY(-50%);
  width:18px;
  height:34px;
  background:linear-gradient(180deg,#e9cf94,var(--brass-dark));
  border-radius:4px;
  box-shadow:0 2px 6px rgba(0,0,0,.5);
}
.book-door-label{
  position:absolute;
  left:0; right:0;
  bottom:16%;
  text-align:center;
  font-family:var(--serif);
  color:var(--brass);
  letter-spacing:.16em;
  text-transform:uppercase;
  font-size:.82rem;
  opacity:.9;
}
.book-door-hint{
  position:absolute;
  left:0; right:0;
  bottom:9%;
  text-align:center;
  color:rgba(255,255,255,.55);
  font-size:.68rem;
  letter-spacing:.08em;
}

/* ---------------- LE CARNET (livre) ---------------- */
.book{
  position:absolute;
  inset:0;
  z-index:5;
  display:flex;
  border-radius:8px;
  overflow:hidden;
  box-shadow:0 30px 80px -25px rgba(0,0,0,.75);
  opacity:0;
  transition:opacity .4s ease .5s;
}
.book-door.opened ~ .book{ opacity:1; }
.book-leaves{
  position:absolute; inset:0; z-index:6;
  opacity:0;
  transition:opacity .4s ease .5s;
}
.book-door.opened ~ .book-leaves{ opacity:1; }
.book-page-slot{
  position:relative;
  width:50%;
  height:100%;
  background:var(--paper);
}
.book-page-slot.left{ border-right:1px solid var(--paper-shadow); box-shadow:inset -14px 0 24px -18px rgba(43,32,25,.35); }
.book-page-slot.right{ box-shadow:inset 14px 0 24px -18px rgba(43,32,25,.35); }

.book-cover-page{
  position:absolute; inset:0;
  display:flex; flex-direction:column; align-items:center; justify-content:center;
  padding:24px; text-align:center;
  background:
    radial-gradient(circle at 50% 30%, rgba(198,161,91,.12), transparent 60%),
    var(--paper);
}
.book-cover-page .crest{
  width:64px; height:64px; border-radius:50%;
  border:2px solid var(--brass-dark);
  display:flex; align-items:center; justify-content:center;
  font-family:var(--serif); font-size:1.6rem; color:var(--brass-dark);
  margin-bottom:16px;
}
.book-cover-page h3{ font-family:var(--serif); font-size:1.3rem; color:var(--ink); margin:0 0 8px; }
.book-cover-page p{ font-size:.82rem; color:var(--ink-soft); max-width:22ch; }

.leaf{
  position:absolute;
  top:0; right:0; width:50%; height:100%;
  transform-style:preserve-3d;
  transform-origin:left center;
  transform:rotateY(0deg);
  transition:transform .85s cubic-bezier(.45,.05,.35,1);
}
.leaf.flipped{ transform:rotateY(-180deg); }
.leaf-face{
  position:absolute;
  inset:0;
  backface-visibility:hidden;
  background:var(--paper);
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding:26px 22px;
}
.leaf-face.back{ transform:rotateY(180deg); }
.leaf-face::after{ /* ombre de pliure */
  content:'';
  position:absolute; inset:0;
  background:linear-gradient(90deg, rgba(43,32,25,.10), transparent 18%, transparent 82%, rgba(43,32,25,.10));
  pointer-events:none;
}
.leaf-face .page-num{
  position:absolute; bottom:14px; font-size:.68rem; color:var(--ink-soft); letter-spacing:.08em;
}
.leaf-face.front .page-num{ right:18px; }
.leaf-face.back .page-num{ left:18px; }

.page-eyebrow{
  font-size:.68rem; letter-spacing:.22em; text-transform:uppercase;
  color:var(--brass-dark); margin-bottom:10px; font-weight:600;
}
.page-link{
  display:block;
  font-family:var(--serif);
  font-size:1.5rem;
  color:var(--ink);
  padding:10px 0;
  border-bottom:1px solid var(--paper-shadow);
  transition:color .2s, padding-left .2s;
}
.page-link:hover, .page-link:focus-visible{ color:var(--terracotta-deep,var(--terracotta)); padding-left:6px; }
.page-link.active{ color:var(--terracotta-deep,var(--terracotta)); font-style:italic; }
.page-link .num{ font-size:.7rem; color:var(--brass-dark); margin-right:10px; font-family:var(--sans); vertical-align:middle; }

.book-cta{
  display:inline-flex; align-items:center; gap:8px;
  margin-top:18px; padding:12px 22px;
  background:var(--terracotta-deep,var(--terracotta)); color:#fff;
  border-radius:100px; font-size:.86rem; text-decoration:none;
}

/* Table des matières (page de gauche par défaut) */
.book-toc{ position:absolute; inset:0; padding:26px 22px; display:flex; flex-direction:column; }
.book-toc h4{ font-family:var(--serif); font-size:1.1rem; margin:0 0 14px; color:var(--ink); }
.book-toc a{ font-size:.86rem; color:var(--ink-soft); padding:7px 0; border-bottom:1px dashed var(--paper-shadow); }
.book-toc a.active{ color:var(--terracotta-deep,var(--terracotta)); font-weight:600; }

/* ---------------- CONTROLES ---------------- */
.book-controls{
  position:absolute;
  left:0; right:0; bottom:-52px;
  display:flex; justify-content:center; align-items:center; gap:18px;
  opacity:0; pointer-events:none;
  transition:opacity .3s ease .6s;
}
.book-door.opened ~ .book-controls{
  opacity:1; pointer-events:auto;
}
.book-nav-btn{
  width:40px; height:40px; border-radius:50%;
  background:rgba(255,255,255,.92); border:1px solid rgba(255,255,255,.4);
  display:flex; align-items:center; justify-content:center;
  font-size:18px; color:var(--wood-1); cursor:pointer;
}
.book-nav-btn:disabled{ opacity:.3; cursor:default; }
.book-progress{ color:rgba(255,255,255,.85); font-size:.78rem; letter-spacing:.06em; min-width:70px; text-align:center; }

@media (max-width:420px){
  .book-menu-stage{ width:94vw; height:80vh; }
  .leaf-face{ padding:20px 16px; }
  .page-link{ font-size:1.25rem; }
}

/* Respecte la préférence de mouvement réduit */
@media (prefers-reduced-motion: reduce){
  .book-door, .leaf, .book-menu-overlay{ transition-duration:.01ms !important; }
}