/* « Revivre » : le livre en 3D, que l'on ouvre et que l'on feuillette.
   Sans dépendance. Palette et typo du site (variables --ink, --terra… avec valeurs de repli). */

/* ---------- emplacement dans la page (livre fermé, qui flotte) ---------- */
.bk-wrap{display:grid;justify-items:center;gap:clamp(10px,1.6vw,18px)}
.bk-slot{position:relative;width:100%;max-width:460px;aspect-ratio:1/1.3;margin-inline:auto}
.bk-static{position:absolute;left:50%;top:50%;width:min(62%,300px);height:auto;transform:translate(-50%,-50%);border-radius:2px 5px 5px 2px;box-shadow:0 30px 50px -28px rgba(22,52,43,.55),0 0 0 1px rgba(22,52,43,.06)}
.bk-wrap.is-ready .bk-static{display:none}
.bk-open{display:inline-flex;align-items:center;gap:.7em;min-height:56px;padding:.7em 1.5em .7em 1.3em;border:2px solid var(--ink,#16342B);border-radius:999px;background:transparent;color:var(--ink,#16342B);font:700 1.02rem/1.2 var(--f,"Plus Jakarta Sans",system-ui,sans-serif);cursor:pointer;transition:background-color .35s var(--ease-out,ease),color .35s var(--ease-out,ease),transform .35s var(--ease-out,ease)}
.bk-open:hover{background:var(--ink,#16342B);color:var(--on-ink,#FBF7F0)}
.bk-open:active{transform:scale(.98)}
.bk-open:focus-visible{outline:3px solid var(--terra,#C4572F);outline-offset:3px}
.bk-open svg{width:22px;height:22px;flex:none}
.bk-open[hidden]{display:none}

/* ---------- la scène 3D ---------- */
.bk-fx{position:absolute;inset:0;transform-origin:50% 50%}
.bk-scene{--shc:34,24,14;--edge:#D9D0BB;--edge-c:#352A20;position:absolute;inset:0;perspective:calc(var(--pw,300px) * 7.6);perspective-origin:50% 44%;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}
.bk-scene.is-idle{cursor:pointer}
.bk-ov .bk-scene{touch-action:none;cursor:grab}
.bk-ov .bk-scene.is-drag{cursor:grabbing}
.bk-rig{position:absolute;left:50%;top:50%;width:0;height:0;transform-style:preserve-3d}

/* ombre portée sur la table : un rectangle flou posé sous le livre (l'élément est calé sur la charnière par le script) */
.bk-gr{position:absolute;left:50%;top:50%;border-radius:3px;background:rgb(var(--shd,22,52,43));opacity:0;pointer-events:none}

/* feuille = couverture ou page ; charnières emboîtées = la feuille se courbe */
.bk-leaf{position:absolute;left:0;top:calc(var(--ph) / -2);width:var(--pw);height:var(--ph);transform-style:preserve-3d;transform-origin:0 50%}
.bk-seg{--ov:3px;--bw:calc(var(--sw) + var(--ov));position:absolute;left:0;top:0;width:var(--bw);height:100%;transform-style:preserve-3d;transform-origin:0 50%}
.bk-seg > .bk-seg{left:calc(100% - var(--ov))}
.bk-seg--last{--bw:var(--sw)}
/* chaque face : papier + éclairage (--c0 → --c1 selon l'orientation de ce morceau de feuille) + ombre portée de la feuille voisine + pli de reliure + image */
.bk-f{position:absolute;inset:0;-webkit-backface-visibility:hidden;backface-visibility:hidden;background-color:var(--paper,#FAF7F2);background-repeat:no-repeat}
.bk-f--f{
  background-image:
    linear-gradient(90deg,var(--c0,rgba(0,0,0,0)),var(--c1,rgba(0,0,0,0))),
    linear-gradient(90deg,rgba(var(--shc),calc(var(--cfa,0) * .55)) 0,rgba(var(--shc),var(--cfa,0)) var(--cfx,40%),rgba(var(--shc),0) calc(var(--cfx,40%) + 17%)),
    var(--gut-f,none),
    var(--img-f,none);
  background-size:100% 100%,var(--pw) 100%,var(--pw) 100%,var(--pw) 100%;
  background-position:0 0,calc(var(--si) * var(--sw) * -1) 0,calc(var(--si) * var(--sw) * -1) 0,calc(var(--si) * var(--sw) * -1) 0}
.bk-f--b{
  transform:rotateY(180deg);
  background-image:
    linear-gradient(90deg,var(--c0,rgba(0,0,0,0)),var(--c1,rgba(0,0,0,0))),
    linear-gradient(270deg,rgba(var(--shc),calc(var(--cba,0) * .55)) 0,rgba(var(--shc),var(--cba,0)) var(--cbx,40%),rgba(var(--shc),0) calc(var(--cbx,40%) + 17%)),
    var(--gut-b,none),
    var(--img-b,none);
  background-size:100% 100%,var(--pw) 100%,var(--pw) 100%,var(--pw) 100%;
  background-position:0 0,calc((var(--pw) - var(--bw) - var(--si) * var(--sw)) * -1) 0,calc((var(--pw) - var(--bw) - var(--si) * var(--sw)) * -1) 0,calc((var(--pw) - var(--bw) - var(--si) * var(--sw)) * -1) 0}
/* pli de reliure (gouttière) : sombre côté dos ; sur les couvertures, la rainure du plat */
.bk-leaf--page,.bk-leaf--ghost,.bk-leaf--back,.bk-leaf--cover{
  --gut-plain-f:linear-gradient(90deg,rgba(var(--shc),.34) 0,rgba(var(--shc),.15) 2.2%,rgba(var(--shc),.05) 6.5%,rgba(var(--shc),0) 15%);
  --gut-plain-b:linear-gradient(270deg,rgba(var(--shc),.34) 0,rgba(var(--shc),.15) 2.2%,rgba(var(--shc),.05) 6.5%,rgba(var(--shc),0) 15%);
  --gut-groove-f:linear-gradient(90deg,rgba(var(--shc),.42) 0,rgba(var(--shc),0) .9%,rgba(255,255,255,.10) 2.1%,rgba(var(--shc),.20) 3.5%,rgba(var(--shc),0) 7%);
  --gut-groove-b:linear-gradient(270deg,rgba(var(--shc),.42) 0,rgba(var(--shc),0) .9%,rgba(255,255,255,.10) 2.1%,rgba(var(--shc),.20) 3.5%,rgba(var(--shc),0) 7%)}
.bk-leaf--page,.bk-leaf--ghost{--gut-f:var(--gut-plain-f);--gut-b:var(--gut-plain-b)}
.bk-leaf--cover{--gut-f:var(--gut-groove-f);--gut-b:var(--gut-plain-b)}
.bk-leaf--back{--gut-f:var(--gut-plain-f);--gut-b:var(--gut-groove-b)}
.bk-leaf--ghost .bk-f{background-size:100% 100%,var(--pw) 100%,var(--pw) 100%,var(--pw) 100%}
/* tranche de la feuille, côté bord libre : épaisseur du papier (ou du carton) */
.bk-edge{position:absolute;left:100%;top:0;width:var(--et,1px);height:100%;transform-origin:0 50%;transform:rotateY(90deg);background:var(--edge)}
.bk-leaf.is-b .bk-edge{transform:rotateY(-90deg)}
.bk-leaf--cover .bk-edge,.bk-leaf--back .bk-edge{background:var(--edge-c)}
/* reflet qui traverse la couverture quand le livre est fermé */
.bk-sheen{position:absolute;inset:0;overflow:hidden;transform:translateZ(.6px);-webkit-backface-visibility:hidden;backface-visibility:hidden;pointer-events:none;opacity:0;transition:opacity .45s ease}
.bk-scene.is-closed .bk-sheen{opacity:1}
.bk-sheen i{position:absolute;top:-10%;bottom:-10%;left:0;width:46%;background:linear-gradient(104deg,rgba(255,255,255,0) 0,rgba(255,255,255,.32) 50%,rgba(255,255,255,0) 100%);transform:translateX(-130%) skewX(-12deg);animation:bk-sheen 7.4s cubic-bezier(.4,0,.2,1) infinite}
@keyframes bk-sheen{0%,58%{transform:translateX(-130%) skewX(-12deg)}100%{transform:translateX(340%) skewX(-12deg)}}
/* dos du livre (les deux faces : livre fermé côté face / côté dos) */
.bk-pl{position:absolute;-webkit-backface-visibility:hidden;backface-visibility:hidden}
.bk-spine{left:calc(var(--bt,20px) / -2);top:calc(var(--ph) / -2);width:var(--bt,20px);height:var(--ph);background:#A8341C var(--img-spine,none) 0 0 / 100% 100% no-repeat;transform:translateZ(calc(var(--bt,20px) / 2)) rotateY(-90deg)}
.bk-spine--b{transform:translateZ(calc(var(--bt,20px) / 2)) rotateY(90deg)}
/* tranches du bloc de pages, en haut et en bas : dessinées en SVG par le script (le profil suit la courbure des pages) */
.bk-sf{position:absolute;left:0;top:0;width:var(--pw);height:var(--hmax,30px);transform-origin:0 0;pointer-events:none;-webkit-backface-visibility:hidden;backface-visibility:hidden}
.bk-sf svg{display:block;width:100%;height:100%;overflow:hidden}
.bk-sf--l{left:calc(var(--pw) * -1)}
.bk-sf--t{transform:translate3d(0,calc(var(--ph) / 2),var(--hmax,30px)) rotateX(-90deg)}
.bk-sf--h{transform:translate3d(0,calc(var(--ph) / -2),0) rotateX(90deg)}

/* ---------- fenêtre plein écran ---------- */
html.bk-lock,html.bk-lock body{overflow:hidden}
.bk-ov{--shd:3,10,7;position:fixed;inset:0;z-index:300;display:grid;grid-template-rows:auto minmax(0,1fr) auto;color:#FBF7F0;font-family:var(--f,"Plus Jakarta Sans",system-ui,sans-serif);overscroll-behavior:contain;visibility:hidden;outline:none}
.bk-ov.is-on{visibility:visible}
.bk-ov__bg{position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(60% 48% at 50% 50%,rgba(244,169,138,.17),rgba(244,169,138,0) 70%),radial-gradient(120% 90% at 50% 40%,#21483B 0%,#16342B 52%,#0C1F18 100%);
  clip-path:circle(0 at var(--ox,50%) var(--oy,50%));transition:clip-path .85s var(--ease-out,cubic-bezier(.16,1,.3,1))}
.bk-ov.is-in .bk-ov__bg{clip-path:circle(150vmax at var(--ox,50%) var(--oy,50%));transition-duration:1.25s}
.bk-dust{position:absolute;inset:0;overflow:hidden;pointer-events:none;opacity:0;transition:opacity 1s ease .4s}
.bk-ov.is-in .bk-dust{opacity:1}
.bk-dust i{position:absolute;bottom:-12px;left:var(--x);width:var(--s);height:var(--s);border-radius:50%;background:rgba(251,247,240,.55);opacity:0;animation:bk-dust var(--t) linear var(--dl) infinite}
@keyframes bk-dust{0%{transform:translate3d(0,0,0);opacity:0}12%{opacity:var(--o)}88%{opacity:var(--o)}100%{transform:translate3d(var(--dx),-108vh,0);opacity:0}}
.bk-top,.bk-bot{position:relative;opacity:0;transform:translateY(10px);transition:opacity .5s ease,transform .6s var(--ease-out,ease)}
.bk-ov.is-ui .bk-top,.bk-ov.is-ui .bk-bot{opacity:1;transform:none}
.bk-top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:calc(env(safe-area-inset-top,0px) + 14px) clamp(14px,3vw,34px) 4px}
.bk-title{display:flex;align-items:baseline;gap:12px;margin:0;font-size:1.02rem;font-weight:700;letter-spacing:.01em}
.bk-title b{font-size:1.5rem;font-weight:800;letter-spacing:-.03em}
.bk-title span{font-size:.92rem;font-weight:600;color:rgba(251,247,240,.8)}
.bk-tools{display:flex;gap:10px}
.bk-btn{display:inline-flex;align-items:center;justify-content:center;gap:.6em;min-height:52px;padding:.55em 1.35em;border:2px solid rgba(251,247,240,.34);border-radius:999px;background:rgba(251,247,240,.07);color:inherit;font:700 1rem/1.2 inherit;text-decoration:none;cursor:pointer;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);transition:background-color .3s ease,border-color .3s ease,transform .3s var(--ease-out,ease),opacity .3s ease}
.bk-btn:hover{background:rgba(251,247,240,.16);border-color:rgba(251,247,240,.6)}
.bk-btn:active{transform:scale(.97)}
.bk-btn:focus-visible{outline:3px solid var(--terra-light,#F4A98A);outline-offset:3px}
.bk-btn[disabled]{opacity:.38;cursor:default;pointer-events:none}
.bk-btn[hidden]{display:none}
.bk-btn svg{width:20px;height:20px;flex:none}
.bk-btn--main{background:var(--btn,#B5492B);border-color:var(--btn,#B5492B);color:#fff}
.bk-btn--main:hover{background:var(--btn-2,#9C3D21);border-color:var(--btn-2,#9C3D21)}
.bk-btn--cta{background:#FBF7F0;border-color:#FBF7F0;color:#16342B}
.bk-btn--cta:hover{background:#FBE4D4;border-color:#FBE4D4}
.bk-btn--cta svg{width:22px;height:22px;color:#1a7f4b}
.bk-stage{position:relative;min-height:0}
.bk-bot{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:clamp(10px,2vw,24px);padding:6px clamp(14px,3vw,34px) calc(env(safe-area-inset-bottom,0px) + 18px)}
.bk-mid{display:grid;justify-items:center;gap:10px;min-width:0}
.bk-count{margin:0;font-size:1rem;font-weight:700;letter-spacing:.01em;text-align:center;min-height:1.5em}
.bk-bar{position:relative;width:min(420px,100%);height:5px;border-radius:5px;background:rgba(251,247,240,.2);overflow:hidden}
.bk-bar i{position:absolute;inset:0;transform-origin:0 50%;transform:scaleX(0);background:var(--terra-light,#F4A98A);border-radius:5px;transition:transform .7s var(--ease-out,ease)}
.bk-acts{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;min-height:52px;align-items:center}
.bk-acts .bk-btn--cta{animation:bk-pop .6s var(--ease-out,ease) both}
.bk-acts [hidden]{display:none}
@keyframes bk-pop{from{opacity:0;transform:translateY(8px) scale(.96)}}
.bk-hint{position:absolute;left:0;right:0;bottom:8px;z-index:1;margin:0;padding:0 16px;text-align:center;font-size:.95rem;font-weight:600;color:rgba(251,247,240,.82);pointer-events:none;opacity:0;transition:opacity .5s ease}
.bk-ov.is-ui .bk-hint{opacity:1;transition-delay:2.3s}
.bk-ov.has-flipped .bk-hint{opacity:0;transition-delay:0s}
.bk-toc{position:absolute;z-index:3;left:50%;bottom:calc(env(safe-area-inset-bottom,0px) + 98px);width:min(440px,calc(100vw - 28px));max-height:min(60vh,460px);overflow:auto;transform:translate(-50%,16px);margin:0;padding:10px;list-style:none;border:1px solid rgba(251,247,240,.2);border-radius:22px;background:rgba(14,36,29,.94);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:0 30px 60px -20px rgba(0,0,0,.6);opacity:0;visibility:hidden;transition:opacity .3s ease,transform .4s var(--ease-out,ease),visibility 0s linear .4s}
.bk-toc.is-open{opacity:1;visibility:visible;transform:translate(-50%,0);transition-delay:0s}
.bk-toc button{display:flex;align-items:baseline;gap:14px;width:100%;min-height:52px;padding:10px 16px;border:0;border-radius:14px;background:transparent;color:inherit;font:600 1.02rem/1.35 inherit;text-align:left;cursor:pointer}
.bk-toc button:hover,.bk-toc button:focus-visible{background:rgba(251,247,240,.12)}
.bk-toc button:focus-visible{outline:3px solid var(--terra-light,#F4A98A);outline-offset:-3px}
.bk-toc em{flex:none;min-width:2.6em;font-style:normal;font-weight:800;color:var(--terra-light,#F4A98A)}
.bk-toc button[aria-current="true"]{background:rgba(244,169,138,.16)}
.bk-sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- lecture agrandie : la page en grand, à lire ---------- */
.bk-rd{position:absolute;inset:0;z-index:6;display:none;grid-template-rows:auto minmax(0,1fr) auto;color:#FBF7F0;background:radial-gradient(120% 90% at 50% 30%,#21483B 0%,#16342B 55%,#0C1F18 100%)}
.bk-rd.is-open{display:grid;animation:bk-rd-in .45s var(--ease-out,cubic-bezier(.16,1,.3,1)) both}
@keyframes bk-rd-in{from{opacity:0;transform:scale(.985)}}
.bk-rd__top{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:calc(env(safe-area-inset-top,0px) + 14px) clamp(14px,3vw,34px) 8px}
.bk-rd__ttl{display:flex;align-items:baseline;gap:12px;margin:0;min-width:0}
.bk-rd__ttl b{font-size:1.5rem;font-weight:800;letter-spacing:-.03em}
.bk-rd__ttl span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:.95rem;font-weight:600;color:rgba(251,247,240,.8)}
.bk-rd__view{display:flex;min-height:0;overflow:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;padding:10px clamp(10px,2vw,24px) 14px;outline:none;scrollbar-color:rgba(251,247,240,.38) transparent}
.bk-rd__view:focus-visible{outline:3px solid var(--terra-light,#F4A98A);outline-offset:-3px}
.bk-rd__fig{flex:none;margin:auto;width:var(--rdw,420px);border-radius:2px;background:var(--paper,#FAF7F2);box-shadow:0 34px 60px -24px rgba(0,0,0,.75),0 0 0 1px rgba(0,0,0,.28)}
.bk-rd__img{display:block;width:100%;height:auto;cursor:zoom-in;-webkit-user-select:none;user-select:none}
.bk-rd.is-zoom .bk-rd__img{cursor:zoom-out}
.bk-rd__nav{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:clamp(10px,2vw,24px);padding:6px clamp(14px,3vw,34px) calc(env(safe-area-inset-bottom,0px) + 18px)}
.bk-rd__count{margin:0;text-align:center;font-size:1rem;font-weight:700;letter-spacing:.01em}

@media (max-width:760px){
  .bk-title span{display:none}
  .bk-title b{font-size:1.3rem}
  .bk-tools{gap:8px}
  .bk-tools .bk-btn{padding:.5em 1.05em}
  .bk-bot{grid-template-columns:1fr 1fr;grid-template-areas:"mid mid" "prev next"}
  .bk-mid{grid-area:mid}
  .bk-bot > .bk-prev{grid-area:prev}
  .bk-bot > .bk-next{grid-area:next}
  .bk-bot .bk-btn{width:100%;padding-inline:.8em}
  .bk-acts{width:100%}
  .bk-acts .bk-btn{flex:1 1 100%}
  .bk-toc{bottom:calc(env(safe-area-inset-bottom,0px) + 168px)}
  .bk-rd__ttl span{display:none}
  .bk-rd__ttl b{font-size:1.3rem}
  .bk-hint{font-size:.88rem}
}
@media (max-width:560px){
  .bk-rd__ttl{display:none}
  .bk-rd__top .bk-tools{flex:1}
  .bk-rd__top .bk-btn{flex:1;white-space:nowrap;padding-inline:.8em}
  .bk-tocbtn,.bk-close{padding-inline:.9em}
  .bk-tocbtn span,.bk-close span,.bk-rd__prev span,.bk-rd__next span{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
  .bk-rd__prev,.bk-rd__next{min-width:56px}
}
@media (max-width:380px){
  .bk-title,.bk-rd__ttl{display:none}
  .bk-top,.bk-rd__top{justify-content:flex-end}
}
@media (max-height:520px) and (orientation:landscape){
  .bk-ov{grid-template-rows:minmax(0,1fr) auto}
  .bk-top{position:absolute;top:0;left:0;right:0;z-index:2;padding-top:calc(env(safe-area-inset-top,0px) + 8px);padding-bottom:0}
  .bk-bot{display:flex;align-items:center;gap:12px;padding:2px clamp(14px,3vw,34px) calc(env(safe-area-inset-bottom,0px) + 8px)}
  .bk-bot .bk-btn{width:auto;min-height:48px}
  .bk-mid{flex:1;display:flex;justify-content:center}
  .bk-count,.bk-bar{display:none}
  .bk-acts{min-height:0;width:auto;flex-wrap:nowrap}
  .bk-acts .bk-btn{flex:0 0 auto}
  .bk-hint{display:none}
  .bk-title span{display:none}
  .bk-btn{min-height:48px}
  .bk-title b{font-size:1.2rem}
  .bk-rd__top{padding-top:calc(env(safe-area-inset-top,0px) + 8px);padding-bottom:2px}
  .bk-rd__nav{padding-bottom:calc(env(safe-area-inset-bottom,0px) + 8px)}
}
@media (prefers-reduced-motion:reduce){
  .bk-sheen i,.bk-dust i,.bk-acts .bk-btn--cta,.bk-rd.is-open{animation:none!important}
  .bk-dust{display:none}
  .bk-ov__bg,.bk-top,.bk-bot,.bk-hint,.bk-toc,.bk-bar i,.bk-sheen{transition-duration:.001ms!important}
}

/* page /livre : sur un écran peu haut, le livre rétrécit un peu pour que le bouton « Feuilleter le livre » reste visible sans défiler */
@media (min-width:961px){.phero .bk-slot{max-width:min(460px,max(260px,calc((100vh - 250px) / 1.3)))}}