.trama{--trama-celula:4px;--trama-opac:.16;position:absolute;inset:0;pointer-events:none;opacity:var(--trama-opac);
  background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='4' height='4'%3E%3Crect width='2' height='2' fill='%23fff'/%3E%3C/svg%3E") 0 0/var(--trama-celula) var(--trama-celula)}