/* ==========================================================================
   BIMsmarter.eu - accueil.css (refonte "Calques", page d'accueil seule)
   1. Scene du hero : maquette federee pilotee par le defilement
   2. Le calque qui glisse par-dessus la scene
   3. Mises en page propres a l'accueil
   Les composants communs (q/a, planches, nomenclature, visas, cote, FAQ,
   cartouche) sont dans site.css.
   ========================================================================== */

/* ---------- 1. Scene ---------- */
.scene { position: relative; z-index: 1; color: #fff; background: var(--navy-dark); }

.stage {
  position: relative;
  min-height: calc(100vh - var(--bar));
  padding: 24px max(var(--gutter), calc((100% - var(--maxw)) / 2 + var(--gutter))) 28px;
  display: grid; gap: 24px;
  grid-template-areas: "copy" "art";
  background:
    radial-gradient(ellipse 70% 60% at 72% 46%, rgba(13, 162, 231, 0.16), transparent 70%),
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px) 0 0 / 48px 48px,
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px) 0 0 / 48px 48px,
    var(--navy-dark);
  overflow: hidden;
}
.stage-art { grid-area: art; position: relative; min-height: 320px; align-self: stretch; }
/* La maquette 3D couvre toute la scene ; la zone .stage-art sert de cadre au cadrage */
.axo { position: absolute; inset: 0; z-index: 1; display: block; width: 100%; height: 100%; pointer-events: none; }
.stage-copy { grid-area: copy; position: relative; z-index: 2; }
.rail { display: none; }

.scene a:not(.btn) { color: #fff; }
.scene a:not(.btn):hover { color: var(--accent); }
.scene .btn-primary { background: var(--accent); color: var(--navy-dark); }
.scene .btn-primary:hover { background: #fff; color: var(--navy-dark); }
.scene .btn-outline { border-color: rgba(255, 255, 255, 0.5); color: #fff; }
.scene .btn-outline:hover { border-color: #fff; background: transparent; color: #fff; }

/* Texte du hero : ligne d'affiche, puis le h1 du site, puis "En bref" */
.cap-intro .display {
  margin: 0;
  font-family: var(--font); font-weight: 700;
  font-size: clamp(1.875rem, 1.2rem + 2.2vw, 3rem); line-height: 1.12; letter-spacing: -0.012em;
  color: #fff; max-width: 16ch; text-wrap: balance;
}
.cap-intro h1 {
  margin: clamp(16px, 2vw, 26px) 0 0; max-width: 36ch;
  font-family: var(--font); font-weight: 600; letter-spacing: 0;
  font-size: clamp(1rem, 0.94rem + 0.3vw, 1.1875rem); line-height: 1.4; color: #fff;
}
.cap-intro .lede { margin: 12px 0 0; max-width: 50ch; color: var(--on-navy-muted); font-size: 0.9688rem; line-height: 1.6; }
.cap-intro .lede strong { color: #fff; }
.cap-intro .btn-group { margin-top: clamp(18px, 2.4vw, 28px); }

/* Methode (mode statique : sans JS ou mouvement reduit) */
.method { margin-top: 56px; }
.method-head { margin: 0; font-family: var(--font); font-weight: 700; font-size: clamp(1.375rem, 1.1rem + 1vw, 1.875rem); line-height: 1.2; color: #fff; max-width: 30ch; }
.method-head span { display: block; margin-top: 6px; font-family: var(--font); font-size: 1rem; font-weight: 400; color: var(--on-navy-muted); }
.steps { display: grid; gap: 28px; margin: 28px 0 0; padding: 0; list-style: none; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.steps li { margin: 0; }
.cap-num { display: block; font: 200 3.25rem/0.85 var(--font); color: var(--accent); }
.steps h3 { margin: 10px 0 0; font-family: var(--font); font-weight: 700; font-size: 1.625rem; line-height: 1.1; color: #fff; }
.steps p { margin: 10px 0 0; color: var(--on-navy-muted); max-width: 34ch; }
.cap-out { display: flex; flex-direction: column; gap: 2px; padding-top: 12px; border-top: 1px solid var(--on-navy-faint); max-width: 30ch; }
.steps .cap-out { margin-top: 18px; color: #fff; font-weight: 500; }
.cap-out span { font-size: 0.8125rem; font-weight: 500; color: var(--accent); }

/* Mode pilote par le defilement (classe .pin posee dans le head) */
.pin .scene { height: 505vh; }
.pin .scene .stage {
  position: sticky; top: var(--bar);
  height: calc(100vh - var(--bar)); height: calc(100svh - var(--bar)); min-height: 0;
  grid-template-areas: "art" "copy" "rail";
  grid-template-rows: minmax(140px, 1fr) auto auto;
  gap: 14px; padding-bottom: 14px;
}
.pin .scene .stage-art { min-height: 0; }
.pin .scene .stage-copy { display: grid; align-items: end; }
.pin .scene .stage-copy > .cap-intro, .pin .scene .stage-copy > .method { grid-area: 1 / 1; }
.pin .scene .method { margin-top: 0; display: grid; }
.pin .scene .method-head { font-family: var(--font); font-weight: 500; font-size: 0.875rem; line-height: 1.4; color: #fff; max-width: 40ch; opacity: 0; transition: opacity 0.5s; }
.pin .scene .method-head span { display: inline; margin: 0; font-size: inherit; }
.pin .scene .stage:not([data-step="0"]) .method-head { opacity: 1; }
.pin .scene .steps { margin-top: 12px; grid-template-columns: 1fr; }
.pin .scene .steps > .cap { grid-area: 1 / 1; }
.pin .scene .cap { opacity: 0; visibility: hidden; transform: translateY(14px); transition: opacity 0.45s var(--ease), transform 0.6s var(--ease), visibility 0s linear 0.6s; }
.pin .scene .cap.is-active { opacity: 1; visibility: visible; transform: none; transition: opacity 0.6s var(--ease) 0.08s, transform 0.7s var(--ease) 0.08s, visibility 0s; }
.pin .scene .steps .cap { display: grid; grid-template-columns: auto 1fr; column-gap: 18px; align-items: start; }
.pin .scene .steps .cap-num { grid-row: 1 / span 3; font-size: clamp(3.25rem, 2rem + 4vw, 6.5rem); }
.pin .scene .steps h3 { margin-top: 0; font-size: clamp(1.75rem, 1.2rem + 1.7vw, 2.625rem); font-weight: 700; }
.pin .scene .steps .cap-out { margin-top: 14px; }

/* Regle cotee : la ligne de cote et ses quatre reperes */
.pin .scene .rail { grid-area: rail; position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); padding-top: 12px; }
.rail-line { position: absolute; left: 0; right: 0; top: 0; height: 1px; background: rgba(255, 255, 255, 0.22); }
.rail-line::before, .rail-line::after { content: ""; position: absolute; top: -6px; width: 1px; height: 13px; background: rgba(255, 255, 255, 0.5); transform: rotate(45deg); }
.rail-line::before { left: 0; }
.rail-line::after { right: 0; }
.rail-mark { position: absolute; top: -1px; left: 0; height: 3px; width: 0; background: var(--accent); }
.rail button { appearance: none; background: none; border: 0; cursor: pointer; padding: 8px 4px 2px 0; text-align: left; font: 500 0.8125rem/1.2 var(--font); color: var(--on-navy-muted); transition: color 0.3s; min-height: 40px; }
.rail button:hover, .rail button.is-on { color: #fff; }
.rail button.is-on::before { content: ""; display: inline-block; width: 6px; height: 6px; margin-right: 6px; background: var(--accent); vertical-align: 1px; }

/* Entree en scene du texte (la maquette 3D a la sienne, dans calques.js) */
@media (prefers-reduced-motion: no-preference) {
  .cap-intro > * { animation: bs-copy-in 1s var(--ease) both; }
  .cap-intro > :nth-child(2) { animation-delay: 0.1s; }
  .cap-intro > :nth-child(3) { animation-delay: 0.16s; }
  .cap-intro > :nth-child(4) { animation-delay: 0.22s; }
  .cap-intro > :nth-child(5) { animation-delay: 0.28s; }
}
@keyframes bs-copy-in { from { opacity: 0; transform: translateY(16px); } }

@media (min-width: 960px) {
  .stage { grid-template-areas: "copy art"; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); column-gap: 40px; align-items: center; }
  .pin .scene .stage { grid-template-areas: "copy art" "rail rail"; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); grid-template-rows: 1fr auto; padding-bottom: 22px; }
  .pin .scene .stage-copy { align-items: center; align-self: stretch; }
  .pin .scene .method-head { font-size: 0.9375rem; }
  .rail button { font-size: 0.875rem; }
}
/* Mobile : "En bref" reste dans le HTML ; on garde la place pour le dessin.
   Les outils et la presentation reviennent dans les sections suivantes. */
@media (max-width: 959px) {
  .pin .scene .cap-intro .lede-tools { display: none; }
  .pin .scene .cap-intro h1 { margin-top: 14px; }
  .pin .scene .cap-intro .btn-group { margin-top: 16px; }
}
@media (max-width: 959px) and (max-height: 820px) {
  .pin .scene .cap-intro .lede { display: none; }
}
/* Ecran de bureau peu haut : la liste des outils revient dans la section Outils */
@media (min-width: 960px) and (max-height: 860px) {
  .pin .scene .cap-intro .lede-tools { display: none; }
}
@media (max-width: 420px) {
  .pin .scene .cap-intro .btn { min-height: 44px; padding: 8px 14px; font-size: 0.875rem; }
}

/* ---------- 2. Le calque : il glisse par-dessus la scene restee figee ---------- */
.calque { position: relative; z-index: 2; background: var(--calque); padding: clamp(36px, 5.5vw, 75px) 0 clamp(56px, 7vw, 104px); }
.pin .scene + .calque {
  margin-top: calc(var(--tail, 45vh) * -1);
  background: rgba(237, 242, 246, 0.9);
  -webkit-backdrop-filter: blur(3px);
  backdrop-filter: blur(3px);
  box-shadow: 0 -30px 60px rgba(0, 0, 0, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.7);
}
.statement {
  margin: 16px 0 0;
  font-family: var(--font); font-weight: 700;
  font-size: clamp(1.875rem, 1rem + 3vw, 3.5rem); line-height: 1.12; letter-spacing: -0.012em;
  color: var(--navy); max-width: 19ch; text-wrap: balance;
}
.calque-grid { display: grid; gap: 32px; margin-top: clamp(32px, 4vw, 56px); align-items: center; }
.calque-text { font-size: clamp(1.0625rem, 1rem + 0.25vw, 1.1875rem); max-width: 60ch; }
.calque-text p:last-child { margin-bottom: 0; }
.calque-fig { margin: 0; border: 1px solid var(--rule-strong); padding: 8px; background: var(--bg); }
.calque-fig img { width: 100%; height: auto; }
.signature { margin: clamp(32px, 4vw, 48px) 0 0; font-weight: 600; color: var(--navy); }
.signature span { display: block; margin-top: 4px; font-weight: 400; color: var(--text-muted); font-size: 0.9375rem; max-width: 60ch; }
.calque .principles { margin-top: clamp(48px, 7vw, 88px); }
@media (min-width: 900px) { .calque-grid { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); column-gap: 64px; } }

/* ---------- 3. Mises en page de l'accueil ---------- */
.fine { margin-top: 20px; color: var(--text-muted); font-size: 0.9375rem; max-width: 76ch; }
.missions-foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 32px; margin-top: 20px; }
.missions-foot .fine { margin: 0; }
.missions-foot .btn-group { margin: 0; }

.process { display: grid; gap: 48px; }
.process-copy .a { margin-bottom: 18px; }
.process-copy > p:not(.a) { max-width: 56ch; }
/* Les deux boutons de l'audit : empiles, meme largeur que le plus long */
.process-copy .btn-group { flex-direction: column; align-items: stretch; width: fit-content; max-width: 100%; }
@media (min-width: 960px) { .process { grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); column-gap: 72px; align-items: center; } }

.refs { background: var(--trame); }
.ref { padding: 32px 0 36px; border-bottom: 1px solid var(--on-navy-faint); }
.ref-id h3 { margin: 0; font-family: var(--font); font-weight: 700; color: #fff; font-size: clamp(1.5rem, 1.15rem + 1.2vw, 2.125rem); line-height: 1.12; max-width: 20ch; }
.ref-id p { margin: 12px 0 0; color: var(--on-navy-muted); max-width: 46ch; font-size: 0.9688rem; }
.ref-id .ref-meta { color: var(--on-navy); font-size: 0.875rem; font-weight: 500; }
@media (min-width: 900px) { .ref { padding: 40px 0 44px; } }
.refs-more { margin: 32px 0 0; font-weight: 600; }

.chiasm { display: grid; gap: 28px; }
.chi { padding-top: 20px; border-top: 1.5px solid var(--navy); }
.chi:last-child { border-top-color: var(--accent); }
.chi h3 { margin: 0; font-family: var(--font); font-weight: 700; font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem); line-height: 1.15; color: var(--navy); }
.chi p { margin: 12px 0 0; max-width: 46ch; }
.chi-x { display: none; color: var(--accent-dark); }
@media (min-width: 900px) {
  .chiasm { grid-template-columns: minmax(0, 1fr) 64px minmax(0, 1fr); column-gap: 32px; align-items: start; }
  .chi-x { display: block; padding-top: 28px; }
  .chi-x svg { width: 64px; height: 120px; }
}
.ia-foot { margin-top: clamp(40px, 5vw, 64px); display: grid; gap: 24px; align-items: center; }
.ia-foot p { margin: 0; max-width: 64ch; color: var(--text-muted); }
.ia-foot .btn-group { margin: 0; }
@media (min-width: 960px) { .ia-foot { grid-template-columns: minmax(0, 1fr) auto; column-gap: 48px; } }
/* Formation et audit IA gratuit : boutons empiles, meme largeur */
@media (min-width: 960px) { .ia-foot .btn-group { flex-direction: column; align-items: stretch; } }

.ifc-grid { display: grid; gap: 40px; align-items: center; }
@media (min-width: 960px) { .ifc-grid { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); column-gap: 56px; } }
.ifc-copy .ticks { margin-top: 26px; }
.ifc-copy .ticks li { color: var(--on-navy); }
.ifc-copy .btn-group { margin-top: 28px; }
.ifc-more { margin: 18px 0 0; color: var(--on-navy-muted); font-size: 0.9375rem; max-width: 48ch; }
.ifc-grid .video-embed { margin: 0; border-color: rgba(255, 255, 255, 0.22); box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3); }
.poster .play-c { transition: fill 0.2s; }
.video-facade-btn:hover .poster .play-c, .video-facade-btn:focus-visible .poster .play-c { fill: #fff; }
.compare { margin-top: clamp(48px, 6vw, 80px); }
.compare h2 { margin-top: 0; max-width: 30ch; }
.summary { margin-top: 24px; color: var(--on-navy-muted); max-width: 86ch; font-size: 0.9375rem; }
.summary strong { color: #fff; }

.tools-train { margin-top: 26px; color: var(--text-muted); max-width: 80ch; }
.voices { margin-top: clamp(56px, 7vw, 96px); padding-top: 40px; border-top: 1px solid var(--rule); }
.voices h2 { margin-top: 0; }

.normes { display: grid; gap: 40px; align-items: center; }
.normes-art { max-width: 520px; width: 100%; margin: 0 auto; }
.normes-copy .a { margin-bottom: 18px; }
.normes-copy > p:not(.a) { max-width: 56ch; }
.case { padding: 14px 18px; border-left: 2px solid var(--accent); background: rgba(255, 255, 255, 0.65); color: var(--text); font-size: 0.9688rem; }
@media (min-width: 960px) { .normes { grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); column-gap: 72px; } }

.faq { display: grid; gap: 32px; }
.faq-title { margin: 0; max-width: 14ch; }
@media (min-width: 960px) {
  .faq { grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); column-gap: 72px; align-items: start; }
  .faq-title { position: sticky; top: calc(var(--bar) + 32px); }
}

.closing { background: var(--trame); padding: clamp(52px, 7vw, 96px) 0; }