/* === Base cell background styling (50% width, keep ratio) === */
.tdBgImage {
  background-repeat: no-repeat;
  background-position: left top;
  background-size: 70% auto; /* largeur 50%, hauteur auto */
}
/* === Specific time slots === */
.bg-1500-1700 { background-image: url("../images/1500-1700.png"); }
.bg-1800-1900 { background-image: url("../images/1800-1900.png"); }
.bg-1900 { background-image: url("../images/1900.png"); }