/* visionneuse */
.lb{border:0;padding:0;background:rgba(12,24,33,.96);color:#fff;width:100vw;height:100vh;
  max-width:100vw;max-height:100vh;margin:0}
.lb::backdrop{background:rgba(12,24,33,.9)}
.lb[open]{display:grid;grid-template-rows:auto 1fr auto}
.lb__top{display:flex;justify-content:space-between;align-items:center;padding:14px 18px;
  font-family:var(--ui);font-weight:700;font-size:.9rem;font-variant-numeric:tabular-nums}
.lb__b{width:50px;height:50px;display:grid;place-items:center;background:transparent;color:#fff;
  border:2px solid rgba(255,255,255,.4);cursor:pointer;font-size:1.05rem;transition:.16s}
.lb__b:hover{background:#fff;color:var(--navy);border-color:#fff}
.lb__s{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:16px;
  padding-inline:18px;min-height:0}
.lb__s img{max-width:100%;max-height:100%;width:auto;height:auto;margin:auto;object-fit:contain}
.lb__v{min-height:0;height:100%;display:grid;place-items:center;overflow:hidden}
.lb__c{padding:16px 18px 22px;text-align:center;font-size:.93rem;color:#D3E6F2;
  max-width:none;margin:0}

@media (max-width:700px){
  .lb__s{grid-template-columns:minmax(0,1fr);padding-inline:0}
  .lb__s .lb__b{position:absolute;top:50%;transform:translateY(-50%);background:rgba(12,24,33,.6)}
  .lb__s .lb__b:first-child{left:8px} .lb__s .lb__b:last-child{right:8px}
}

/* Une seule photo : les flèches gardent leur place, invisibles et inactives (assets/site/visionneuse.js) */
.lb--1 .lb__prec,.lb--1 .lb__suiv{visibility:hidden}