/* En-tête secteur 1B — nuage de points 3D, typo géante */
.e1b { position: relative; min-height: 100svh; display: grid; align-content: end; padding: clamp(96px, 12vw, 160px) var(--gouttiere) clamp(40px, 5vw, 72px); overflow: hidden; background: var(--fond); color: var(--texte); }
.e1b canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; -webkit-mask-image: linear-gradient(#000 35%, rgba(0,0,0,.35) 75%); mask-image: linear-gradient(#000 35%, rgba(0,0,0,.35) 75%); }
.e1b > :not(canvas) { position: relative; z-index: 1; }
.e1b__secteur { font-family: var(--police-donnees); font-size: var(--t-s); color: var(--texte-doux); margin: 0 0 var(--e-3); }
.e1b__titre { font-family: var(--police-titres); font-weight: var(--graisse-titres); font-size: clamp(2.6rem, 11.5vw, 14rem); line-height: .86; letter-spacing: -.055em; margin: 0; text-wrap: balance; text-shadow: 0 0 .25em var(--fond), 0 0 .6em var(--fond); overflow-wrap: break-word; }
.e1b__ligne { display: block; overflow: hidden; padding-bottom: .04em; }
.e1b__ligne > span { display: inline-block; animation: e1b-monte 1s var(--courbe) both; }
.e1b__ligne + .e1b__ligne > span { animation-delay: .12s; }
@keyframes e1b-monte { from { transform: translateY(105%); } }
.e1b__nom { white-space: nowrap; }
.e1b__alt { display: inline-grid; }
.e1b__alt > span { grid-area: 1/1; transition: opacity .5s, transform .6s var(--courbe); }
.e1b__alt > span:not(.actif) { opacity: 0; transform: translateY(.3em); }
.e1b__bas { display: grid; gap: var(--e-6); grid-template-columns: 1fr; margin-top: var(--e-8); align-items: end; }
@media (min-width: 900px) { .e1b__bas { grid-template-columns: 1.2fr 1fr auto; } }
.e1b__bas p { margin: 0; font-size: var(--t-intro); line-height: 1.3; max-width: 40ch; }
.e1b__appel { display: grid; gap: var(--e-2); justify-items: start; }
.e1b__appel .tel { font-size: var(--t-s); color: var(--texte-doux); }
.vh-e1b { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
@media (max-width: 599px) { .e1b__titre { font-size: clamp(2.4rem, 13vw, 4rem); } }
@media (prefers-reduced-motion: reduce) {
  .e1b__ligne > span { animation: none; }
  .e1b__alt > span { transition: none; grid-area: auto; }
  .e1b__alt > span:not(.actif) { display: none; }
}