/* =================================================================
   LCP IMMOBILIER — LABORATOIRE (page dédiée)
   Styles spécifiques à laboratoire.html. Charge APRÈS style.css
   (mêmes tokens / polices / curseur / labels). Isolé de la home.
   ================================================================= */

/* Page labo : fond sombre plein, pas de bandes claires */
.lab-page { background: var(--dark-bg); }
.lab-page .lab { background: var(--dark-bg); padding-top: clamp(7rem, 16vh, 12rem); }

/* Header propre à la page (retour vers la home) */
.lab-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem var(--pad-side);
  mix-blend-mode: difference; /* lisible sur sombre comme sur clair */
}
.lab-header__brand { display: flex; align-items: baseline; gap: 0.6rem; color: var(--sand); }
.lab-header__mark {
  font-family: var(--font-main); font-weight: 700;
  text-transform: lowercase; letter-spacing: var(--tracking-snug); font-size: 1.25rem;
}
.lab-header__back {
  font-family: var(--font-main); font-size: 0.625rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--slate);
}
.lab-header__label {
  font-family: var(--font-main); font-size: 0.625rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--sand);
}

/* =================================================================
   ==================  LE LABORATOIRE  ============================
   Vitrine de features. Fond sombre, DA respectée, fallbacks propres.
   ================================================================= */
.lab {
  position: relative;
  padding: clamp(6rem, 14vh, 12rem) 0 clamp(5rem, 12vh, 10rem);
  color: var(--sand);
  background: var(--dark-bg);
}
.lab ::selection { background: var(--sand); color: var(--ink); }

/* Rideau de transition (voile olive) */
.lab__curtain {
  position: fixed; inset: 0; z-index: 80;
  background: var(--olive); pointer-events: none;
  transform: scaleY(0); transform-origin: bottom;
  will-change: transform;
}

/* Intro */
.lab__intro { padding: 0 var(--pad-x) clamp(3rem, 8vh, 6rem); max-width: 1400px; }
.lab__intro .label { color: var(--moss); }
.lab__title {
  font-family: var(--font-accent); font-weight: 900;
  text-transform: uppercase; letter-spacing: var(--tracking-tight);
  font-size: clamp(3rem, 11vw, 10rem); line-height: 0.9;
  margin: 1.4rem 0 clamp(1.5rem, 4vh, 2.5rem);
}
.lab__lead { max-width: 44ch; color: rgba(244, 242, 238, 0.72); font-size: clamp(1.05rem, 1.5vw, 1.35rem); }

/* Blocs étiquetés */
.lab-block { padding: clamp(3rem, 8vh, 6rem) var(--pad-x); }
.lab-block--flush { padding-left: 0; padding-right: 0; }
.lab-block__head { display: flex; align-items: baseline; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; margin-bottom: clamp(1.8rem, 4vh, 3rem); }
.lab-block__head--pad { padding: 0 var(--pad-x); }
.lab-block__label {
  font-family: var(--font-main); font-weight: 500;
  font-size: 0.625rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--slate);
}
.lab-block__note {
  font-family: var(--font-main); font-size: 0.625rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--moss);
}

/* 01 · Galerie WebGL (fallback = grille d'images) */
.lab-gallery {
  position: relative;
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: clamp(0.6rem, 1.4vw, 1.1rem);
}
.lab-gallery__canvas { position: absolute; inset: 0; z-index: 1; pointer-events: none; }
.lab-gallery__item {
  position: relative; z-index: 2; margin: 0; overflow: hidden;
  aspect-ratio: 4 / 3; cursor: pointer;
}
.lab-gallery__item img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform 1.2s var(--ease-out-expo), opacity 0.6s var(--ease);
}
/* survol (mode fallback, sans WebGL) : léger zoom */
.lab-gallery:not(.is-webgl) .lab-gallery__item:hover img { transform: scale(1.06); }
.lab-gallery.is-webgl .lab-gallery__item img { opacity: 0; } /* le canvas prend le relais */
.lab-gallery.is-webgl .lab-gallery__item { background: var(--olive); }

/* 02 · Scroll horizontal pinné */
.lab-h { overflow: hidden; }
.lab-h__track { display: flex; gap: clamp(1rem, 2vw, 2rem); padding: 0 var(--pad-x); will-change: transform; }
.lab-h__panel { position: relative; flex: 0 0 auto; width: clamp(70vw, 46vw, 620px); margin: 0; overflow: hidden; }
.lab-h__panel img { width: 100%; height: clamp(52vh, 64vh, 70vh); object-fit: cover; display: block; }
.lab-h__panel figcaption {
  position: absolute; left: 1rem; bottom: 1rem;
  font-family: var(--font-main); font-size: 0.625rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--sand); mix-blend-mode: difference;
}

/* 03 · Scrollytelling sticky */
.lab-story { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 5rem); align-items: start; }
.lab-story__visual {
  position: sticky; top: 12vh; height: 76vh; overflow: hidden;
}
.lab-story__img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transform: scale(1.04);
  transition: opacity 1.1s var(--ease-out-expo), transform 1.4s var(--ease-out-expo);
}
.lab-story__img.is-active { opacity: 1; transform: scale(1); }
.lab-story__steps { display: flex; flex-direction: column; }
.lab-story__step { min-height: 70vh; display: flex; flex-direction: column; justify-content: center; gap: 1.2rem; }
.lab-step__idx {
  font-family: var(--font-role); font-style: italic; font-weight: 400;
  font-size: clamp(2rem, 5vw, 3.6rem); color: var(--sand);
}
.lab-story__step p { max-width: 34ch; color: rgba(244, 242, 238, 0.7); }

/* 04 · Comparateur avant / après */
.lab-compare { position: relative; overflow: hidden; aspect-ratio: 16 / 9; user-select: none; touch-action: pan-y; }
.lab-compare__img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.lab-compare__before {
  position: absolute; inset: 0; width: 50%; overflow: hidden;
  border-right: 1px solid rgba(244, 242, 238, 0.5);
}
.lab-compare__before .lab-compare__img { width: 100vw; max-width: none; }
.lab-compare__handle {
  position: absolute; top: 50%; left: 50%; z-index: 3;
  width: 46px; height: 46px; margin: -23px 0 0 -23px;
  border-radius: 50%; border: 1px solid var(--sand); background: rgba(11,11,13,0.35);
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px);
  cursor: ew-resize; display: grid; place-items: center;
}
.lab-compare__handle span, .lab-compare__handle::before, .lab-compare__handle::after {
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--sand);
}
.lab-compare__tag {
  position: absolute; bottom: 1rem; z-index: 2;
  font-family: var(--font-main); font-size: 0.625rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--sand); mix-blend-mode: difference;
}
.lab-compare__tag--l { left: 1rem; }
.lab-compare__tag--r { right: 1rem; }

/* 05 · Marquee vélocité */
.lab-marquee { overflow: hidden; white-space: nowrap; border-top: 1px solid rgba(244,242,238,0.14); border-bottom: 1px solid rgba(244,242,238,0.14); padding: clamp(1rem, 2.4vw, 1.8rem) 0; }
.lab-marquee__track { display: inline-flex; will-change: transform; }
.lab-marquee__track span {
  font-family: var(--font-accent); font-weight: 800;
  text-transform: uppercase; letter-spacing: var(--tracking-snug);
  font-size: clamp(1.8rem, 4.4vw, 3.6rem); color: var(--sand);
}

/* Responsive lab */
@media (max-width: 860px) {
  .lab-gallery { grid-template-columns: repeat(2, 1fr); }
  .lab-story { grid-template-columns: 1fr; }
  .lab-story__visual { position: relative; top: 0; height: 56vh; margin-bottom: 2rem; }
  .lab-story__step { min-height: 46vh; }
  .lab-h__panel { width: 82vw; }
}

/* Reduced-motion : pas de scroll-jacking, tout en statique lisible */
@media (prefers-reduced-motion: reduce) {
  .lab__curtain { display: none; }
  .lab-gallery.is-webgl .lab-gallery__item img { opacity: 1; }
}

/* ---- Galerie : survol CSS (remplace le WebGL retiré) — GPU, fluide ---- */
.lab-gallery__item { overflow: hidden; }
.lab-gallery__item img { transition: transform .7s var(--ease-out-expo, cubic-bezier(.19,1,.22,1)), filter .7s ease; will-change: transform; backface-visibility: hidden; }
.lab-gallery__item:hover img { transform: scale(1.05); filter: contrast(1.04) brightness(1.03); }