body {
  font-family: Arial, sans-serif;
  margin: 0;
}

/* Overlay sombre */
.overlay {
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  top:0;
  left:0;
  width:100%;
  height:100%;
  background: rgba(0,0,0,0.6);
  z-index: 1000;
}

/* Popup centré */
.popup {
  background: #fff;
  padding: 30px 25px;
  max-width: 500px;
  width: 90%;
  border-radius: 12px;
  text-align: center;
  position: relative;
  box-shadow: 0 10px 40px rgba(0,0,0,0.4);
}

/* Croix fermer */
.close {
  position: absolute;
  top: 10px;
  right: 15px;
  font-size: 28px;
  cursor: pointer;
}