/* H&C — page Box & livres (/ressources/box-et-livres/). Se charge après fiche.css et apropos.css
   (`.btn--paper`, `.ex`, `.apf*`).
   2026-10-15 — l'utilisateur a choisi la piste 2 « L'étagère » parmi les six
   (planche : captures/ressources/planche-box.jpg).

   1. Hero · `.bx` : nuit + projecteur sur rail ; cinq produits posés sur une planche (dos de livres, coffrets et livrets
      dessinés en CSS, à l'échelle `--k`), le produit choisi est en couleur et éclairé, sa fiche `.bxp` est dessous.
      box.js règle --rig-x / --rig-tilt pour que le projecteur pivote vers lui.
   2. Les cinq livres du Pack · `.bxl` : sommaire sur papier + photo et carte « écrit par / préfacé par ».
   3. Pour les entreprises · `.bxe` : photo + trois publics + bouton de commande groupée (mur clair).
   4. Commander · `.bxc` : paiement, livraison, version numérique + encart parcours certifiants (papier).
   5. Rideau final `.apf` (apropos.css) puis le pied de page.

   ≤ 1239 px : étagère à 0,76 ; ≤ 1000 px : une colonne, étagère à 0,6, fiche en pile ; ≤ 560 px : étagère sur deux rangées. */

:root { --bx-card: #10213a; --bx-soft: #4b5569; --bx-muted: #5b6478; }

/* le projecteur glisse d'un produit à l'autre : --rig-x et --rig-tilt sont de vraies valeurs animables */
@property --rig-x { syntax: "<length-percentage>"; inherits: true; initial-value: 50%; }
@property --rig-tilt { syntax: "<angle>"; inherits: true; initial-value: 0deg; }

/* ---------- communs ---------- */
.bx :is(a, button):focus-visible, .bxl :is(a, button):focus-visible, .bxe :is(a, button):focus-visible, .bxc :is(a, button):focus-visible { outline: 2px solid var(--gold); outline-offset: 3px; }
.bx :where(ul, ol), .bxl :where(ol), .bxe :where(ul), .bxc :where(ul) { margin: 0; padding: 0; list-style: none; }

/* bouton plein sombre sur la carte jaune : le pendant du bouton jaune (pas de contour) */
.btn--ink { padding-left: 7px; background: var(--ink); color: #fff; }
.btn--ink:hover { background: var(--night); }
.btn--ink .btn__label { flex: 1; text-align: left; }
.btn--ink .btn__icon { background: var(--gold); color: var(--ink); }
.btn--ink:hover .btn__icon { background: var(--gold); transform: rotate(-10deg); }

/* ---------- 1. Hero : l'étagère ---------- */
.bx {
  --k: 1;
  --rig-x: 24%;
  --rig-y: 12px;
  --rig-w: 72px;
  --rig-tilt: 0deg;
  padding-top: clamp(104px, 9vw, 128px);
  padding-bottom: clamp(48px, 5vw, 80px);
  transition: --rig-x 0.6s var(--ease-out), --rig-tilt 0.6s var(--ease-out);
}
.bx .cone { --spread: 24deg; --throw: 1000px; }

.bx__top {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 380px);
  align-items: end;
  gap: 24px clamp(24px, 5vw, 80px);
}
.bx__copy { display: grid; justify-items: start; gap: 14px; min-width: 0; }
.bx__copy .fh__crumb { margin-bottom: 4px; }
.bx__h { max-width: 22ch; font-size: clamp(2.1rem, 3.5vw, 3.2rem); }
.bx .fb__lead { max-width: 52ch; }

/* carte jaune : l'offre du Pack */
.bx__gift {
  display: grid;
  justify-items: start;
  gap: 6px;
  padding: 22px 24px 24px;
  border-radius: 28px;
  background: var(--gold);
  color: var(--ink);
}
.bx__giftk { margin: 0; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
.bx__giftt { margin: 0; font-size: clamp(1.6rem, 2.2vw, 2rem); font-weight: 400; line-height: 1.05; letter-spacing: -0.02em; }
.bx__giftp { margin: 0 0 8px; max-width: 30ch; line-height: 1.4; }

/* l'étagère */
.bx__stage { position: relative; z-index: 1; margin-top: clamp(24px, 3vw, 40px); }
.bx__shelf {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: center;
  column-gap: calc(var(--k) * 30px);
  row-gap: 22px;
  padding-top: 10px;
}

.bxg {
  display: grid;
  justify-items: center;
  align-content: end;
  min-width: max-content;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: center;
  cursor: pointer;
  overflow: visible;
}
.bxg:focus-visible { outline-offset: 6px; border-radius: 6px; }
.bxg__art {
  display: flex;
  align-items: flex-end;
  opacity: 0.42;
  filter: saturate(0.55);
  transition: opacity 0.4s, filter 0.4s, translate 0.45s var(--ease-out);
}
.bxg:hover .bxg__art { opacity: 0.7; }
.bxg.is-lit .bxg__art { opacity: 1; filter: none; translate: 0 -8px; }

/* la planche : un morceau sous chaque produit, ils se rejoignent */
.bxg__pl {
  justify-self: stretch;
  height: 18px;
  margin-inline: calc(var(--k) * -15px);
  background: linear-gradient(#34456f, #16213d);
  box-shadow: 0 16px 26px rgb(0 0 0 / 0.5), inset 0 1px 0 rgb(255 255 255 / 0.14);
}
.bxg:first-child .bxg__pl { margin-left: calc(var(--k) * -44px); border-radius: 6px 0 0 0; }
.bxg:last-child .bxg__pl { margin-right: calc(var(--k) * -44px); border-radius: 0 6px 0 0; }
.bxg__lab { display: grid; gap: 2px; margin-top: 14px; font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.07em; text-transform: uppercase; line-height: 1.3; color: rgb(255 255 255 / 0.74); white-space: nowrap; transition: color 0.3s; }
.bxg__lab small { font-size: 0.875rem; font-weight: 400; letter-spacing: 0; text-transform: none; font-variant-numeric: tabular-nums; }
.bxg.is-lit .bxg__lab { color: var(--gold); }

/* dessins : tout se met à l'échelle avec --k */
.sp {
  position: relative;
  flex: none;
  width: calc(var(--sw) * var(--k) * 1px);
  height: calc(var(--sh) * var(--k) * 1px);
  margin-bottom: calc(var(--lift, 0) * var(--k) * 1px);
  border-radius: 3px 3px 1px 1px;
  background: linear-gradient(90deg, rgb(0 0 0 / 0.28), transparent 20%, transparent 68%, rgb(0 0 0 / 0.34)), var(--c);
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.25);
}
.sp::before, .sp::after { content: ""; position: absolute; left: 0; right: 0; height: calc(var(--k) * 3px); background: var(--t); opacity: 0.55; }
.sp::before { top: calc(var(--k) * 11px); }
.sp::after { bottom: calc(var(--k) * 11px); }
.sp b {
  position: absolute;
  top: calc(var(--k) * 24px);
  right: 0;
  bottom: calc(var(--k) * 24px);
  left: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  font-size: calc(var(--f) * var(--k) * 1px);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  white-space: nowrap;
  color: var(--t);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}
.cf {
  position: relative;
  flex: none;
  display: block;
  width: calc(var(--w) * var(--k) * 1px);
  height: calc(var(--h) * var(--k) * 1px);
  border-radius: calc(var(--k) * 8px);
  background: linear-gradient(165deg, #2c3c68, #131c33 72%);
  box-shadow: 0 calc(var(--k) * 30px) calc(var(--k) * 50px) rgb(0 0 0 / 0.45), inset 0 1px 0 rgb(255 255 255 / 0.14);
}
.cf__in {
  position: absolute;
  top: 11%;
  right: 7%;
  bottom: 27%;
  left: 7%;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: calc(var(--k) * 3px);
  padding: 0 calc(var(--k) * 8px);
  border-radius: 4px;
  background: #070d19;
  box-shadow: inset 0 10px 16px rgb(0 0 0 / 0.75);
}
.cf__front {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 27%;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 3px;
  padding: 0 8px;
  border-top: 2px solid var(--gold);
  text-align: center;
}
.cf__front b { font-size: calc(12px * var(--k)); font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gold); }
.cf__front span { font-size: calc(12px * var(--k)); color: rgb(255 255 255 / 0.72); }
.flat {
  position: relative;
  flex: none;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: calc(var(--k) * 8px);
  width: calc(var(--w) * var(--k) * 1px);
  height: calc(var(--h) * var(--k) * 1px);
  padding: 0 calc(var(--k) * 12px);
  border-radius: 6px 10px 10px 6px;
  background: linear-gradient(100deg, rgb(0 0 0 / 0.35), transparent 14%), linear-gradient(160deg, #1f3566, #0e1a33);
  box-shadow: 0 calc(var(--k) * 26px) calc(var(--k) * 44px) rgb(0 0 0 / 0.45), inset 0 1px 0 rgb(255 255 255 / 0.16);
  text-align: center;
}
.flat b { font-size: calc(46px * var(--k)); font-weight: 300; line-height: 0.9; letter-spacing: -0.03em; color: var(--gold); }
.flat span { font-size: calc(12px * var(--k)); font-weight: 600; letter-spacing: 0.1em; line-height: 1.3; text-transform: uppercase; color: rgb(255 255 255 / 0.85); }
.flat--thin { background: linear-gradient(100deg, rgb(0 0 0 / 0.3), transparent 14%), linear-gradient(160deg, #f1ece0, #cfc8b6); }
.flat--thin b { font-size: calc(34px * var(--k)); color: #8a6500; }
.flat--thin span { color: var(--ink); }

/* la fiche du produit éclairé : une seule est affichée, elle apparaît en fondu */
.bx__panels { margin-top: clamp(22px, 2.6vw, 34px); }
.bxp {
  display: none;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 20px clamp(24px, 4vw, 64px);
  padding: clamp(20px, 2.2vw, 30px) clamp(22px, 3vw, 44px);
  border-radius: 28px;
  background: var(--bx-card);
}
.bxp.is-on { display: grid; animation: bxp-in 0.4s var(--ease-out); }
@keyframes bxp-in { from { opacity: 0; translate: 0 10px; } }
.bxp__tx { min-width: 0; }
.bxp__k { margin: 0; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.07em; text-transform: uppercase; color: var(--gold); }
.bxp__t { margin: 8px 0 0; font-size: clamp(1.5rem, 2.4vw, 2.2rem); font-weight: 400; line-height: 1.1; letter-spacing: -0.02em; text-wrap: balance; }
.bxp__line { margin: 8px 0 0; font-size: 1.0625rem; font-weight: 500; line-height: 1.4; }
.bxp__d { margin: 6px 0 0; max-width: 72ch; line-height: 1.5; color: rgb(255 255 255 / 0.78); }
.bxp__more { margin-left: 4px; font-weight: 500; color: #fff; text-decoration: underline; text-decoration-color: var(--gold); text-decoration-thickness: 2px; text-underline-offset: 4px; }
.bxp__facts { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.bxp__facts li { padding: 5px 12px; border-radius: 16px; background: rgb(255 255 255 / 0.12); font-size: 0.875rem; font-weight: 500; }

.bxp__buy { display: grid; justify-items: start; gap: 12px; min-width: 240px; }
.bxp__fmt { display: inline-flex; gap: 4px; padding: 4px; border-radius: 999px; background: rgb(255 255 255 / 0.1); }
.bxp__fmt button { min-height: 36px; padding: 0 16px; border: 0; border-radius: 999px; background: none; color: rgb(255 255 255 / 0.82); font: inherit; font-size: 0.9375rem; font-weight: 500; cursor: pointer; transition: background 0.25s, color 0.25s; }
.bxp__fmt button.is-on { background: var(--gold); color: var(--ink); }
.bxp__fmt button:not(.is-on):hover { background: rgb(255 255 255 / 0.12); }
.bxp__pr { margin: 0; line-height: 1; color: var(--gold); }
.bxp__pr[hidden] { display: none; }
.bxp__pr b { font-size: clamp(2.3rem, 3.2vw, 3rem); font-weight: 300; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.bxp__pr small { margin-left: 6px; font-size: 1.125rem; font-weight: 500; }
.bxp__usd { margin-left: 12px; font-size: 0.9375rem; font-weight: 400; color: rgb(255 255 255 / 0.72); }
.bx__ex { position: relative; z-index: 1; margin-top: clamp(20px, 2.4vw, 30px); }

/* ---------- 2. Les cinq livres du Pack ---------- */
.bxl { padding-block: clamp(64px, 8vw, 120px); }
.bxl__grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); align-items: start; gap: clamp(28px, 5vw, 80px); }
.bxl__head { display: grid; justify-items: start; gap: 14px; }
.bxl__list { margin-top: clamp(24px, 3vw, 40px); border-top: 1px solid rgb(22 33 61 / 0.14); }
.bxl__li { display: grid; grid-template-columns: clamp(56px, 6vw, 84px) minmax(0, 1fr); align-items: baseline; gap: 6px 14px; padding: 18px 0; border-bottom: 1px solid rgb(22 33 61 / 0.14); }
.bxl__n { font-size: clamp(1.8rem, 3vw, 2.6rem); font-weight: 300; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; color: #8a6500; }
.bxl__li h3 { margin: 0; font-size: clamp(1.15rem, 1.6vw, 1.4rem); font-weight: 500; line-height: 1.2; letter-spacing: -0.01em; text-wrap: balance; }
.bxl__li p { margin: 4px 0 0; max-width: 46ch; line-height: 1.5; color: var(--bx-soft); }
.bxl__unit { margin: 22px 0 0; line-height: 1.5; color: var(--bx-muted); }
.bxl__unit a { margin-left: 4px; font-weight: 500; color: var(--ink); text-decoration: underline; text-decoration-color: var(--gold); text-decoration-thickness: 2px; text-underline-offset: 4px; }
.bxl__ex { margin-top: 12px; }
.bxl__side { position: relative; }
.bxl__ph { position: relative; aspect-ratio: 1; overflow: hidden; border-radius: 28px; background: #14233a; }
.bxl__ph img { display: block; width: 100%; height: 100%; object-fit: cover; }
.bxl__who { position: relative; z-index: 1; margin: -72px 20px 0; padding: 22px 24px 24px; border-radius: 24px; background: var(--night); color: #fff;  }
.bxl__wk { margin: 0; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; color: var(--gold); }
.bxl__wk:not(:first-child) { margin-top: 14px; }
.bxl__wn { margin: 4px 0 0; font-size: 1.0625rem; line-height: 1.45; }

/* ---------- 3. Pour les entreprises ---------- */
.bxe { padding-block: clamp(64px, 8vw, 120px); }
.bxe__grid { display: grid; grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr); align-items: center; gap: clamp(28px, 5vw, 88px); }
.bxe__ph { position: relative; aspect-ratio: 4 / 5; max-height: 600px; overflow: hidden; border-radius: 28px; background: #14233a; }
.bxe__ph img { display: block; width: 100%; height: 100%; object-fit: cover; }
.bxe__tx { display: grid; justify-items: start; gap: 16px; min-width: 0; }
.bxe__aud { display: grid; gap: 10px; width: 100%; margin-top: 4px; }
.bxe__aud li { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 16px; padding: 14px 20px 14px 14px; border-radius: 24px; background: #fff; }
.bxe__ic { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; background: var(--ink); color: #fff; }
.bxe__ic svg { width: 22px; height: 22px; stroke-width: 1.8; }
.bxe__aud b { display: block; font-size: 1.0625rem; font-weight: 500; line-height: 1.25; }
.bxe__aud small { display: block; margin-top: 2px; font-size: 0.9375rem; line-height: 1.4; color: var(--bx-soft); }
.bxe__act { margin-top: 6px; }

/* ---------- 4. Commander ---------- */
.bxc { padding-block: clamp(64px, 8vw, 120px); }
.bxc__head { display: grid; justify-items: start; gap: 14px; }
.bxc__row { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 2.2vw, 28px); margin-top: clamp(28px, 4vw, 52px); }
.bxc__c { display: grid; align-content: start; gap: 8px; padding: clamp(22px, 2.4vw, 30px); border-radius: 26px; background: var(--wall); }
.bxc__ic { display: grid; place-items: center; width: 52px; height: 52px; margin-bottom: 8px; border-radius: 50%; background: var(--ink); color: #fff; }
.bxc__ic svg { width: 24px; height: 24px; stroke-width: 1.8; }
.bxc__c h3 { margin: 0; font-size: clamp(1.2rem, 1.6vw, 1.4375rem); font-weight: 500; line-height: 1.2; letter-spacing: -0.01em; }
.bxc__c p { margin: 0; max-width: 34ch; line-height: 1.5; color: var(--bx-soft); }
.bxc__ex { margin-top: 18px; }
.bxc__cert {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px 32px;
  margin-top: clamp(24px, 3vw, 40px);
  padding: clamp(22px, 2.6vw, 34px) clamp(24px, 3vw, 44px);
  border-radius: 30px 30px 0 0;
  background: var(--night);
  color: #fff;
}
.bxc__ck { margin: 0; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.07em; text-transform: uppercase; color: var(--gold); }
.bxc__ct { margin: 6px 0 0; font-size: clamp(1.25rem, 2vw, 1.75rem); font-weight: 400; line-height: 1.2; letter-spacing: -0.01em; text-wrap: balance; }
.bxc__cert .btn { flex: none; }

/* =========================================================
   Tablette et mobile
   ========================================================= */
@media (max-width: 1239px) {
  .bx { --k: 0.76; }
}
@media (max-width: 1000px) {
  .bx { --k: 0.6; --rig-x: 70%; }
  .bx__top { grid-template-columns: minmax(0, 1fr); }
  .bx__gift { max-width: 460px; }
  .bxp { grid-template-columns: minmax(0, 1fr); }
  .bxp__buy { grid-template-columns: auto auto; align-items: center; justify-content: start; gap: 12px 24px; }
  .bxp__buy .btn { grid-column: 1 / -1; justify-self: start; }
  .bxl__grid { grid-template-columns: minmax(0, 1fr); }
  .bxl__side { max-width: 520px; }
  .bxe__grid { grid-template-columns: minmax(0, 1fr); }
  .bxe__ph { aspect-ratio: 16 / 10; max-height: none; }
  .bxc__row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .bxc__c:last-child { grid-column: 1 / -1; }
}
@media (max-width: 760px) {
  .cf__front b, .cf__front span { display: none; }
  .bxc__cert { align-items: flex-start; flex-direction: column; border-radius: 26px 26px 0 0; }
  .bxc__row { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
  .bx { --k: 0.56; }
  .bx__h { max-width: none; font-size: clamp(1.9rem, 8.4vw, 2.3rem); }
  .bx__gift { max-width: none; }
  .bx__shelf { column-gap: calc(var(--k) * 24px); }
  .bxg__lab { font-size: 0.75rem; letter-spacing: 0.04em; }
  .bxp { padding: 20px 18px 22px; border-radius: 24px; }
  .bxp__buy { grid-template-columns: minmax(0, 1fr); }
  .bxl__who { margin-inline: 12px; }
  .bxl__li { grid-template-columns: 48px minmax(0, 1fr); }
}
@media (prefers-reduced-motion: reduce) {
  .bx { transition: none; }
  .bxg__art, .bxg__lab, .bxp__fmt button { transition: none; }
  .bxp.is-on { animation: none; }
}