/* Fond de la landing (index.html) : noir + vignette de coins. Feuille partagée avec /acces : un seul fond, aucune copie qui dérive. */
html, body { margin: 0; min-height: 100%; background: #000; }
.vignette {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 66% at 0% 0%, rgba(72, 12, 20, 0.2), transparent 74%),
    radial-gradient(ellipse 80% 66% at 100% 0%, rgba(72, 12, 20, 0.2), transparent 74%),
    radial-gradient(ellipse 88% 72% at 0% 100%, rgba(54, 8, 16, 0.22), transparent 76%),
    radial-gradient(ellipse 88% 72% at 100% 100%, rgba(54, 8, 16, 0.22), transparent 76%);
}