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

#bgOverlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover; /*sert a couvrir l'ecran en zoomant l'img */
  background-position: center;
  background-repeat: no-repeat; /* ca ne repete pas l'image comme avec le crane a tassou*/
  background-color: black;
  z-index: -1;
  transition: opacity 0.8s ease-in-out;
  opacity: 1;
}

form {
  position: relative;
  z-index: 1;
  max-width: 400px;
  margin: 100px auto;
  background: rgba(255,255,255,0.9);
  padding: 20px;
  border-radius: 10px;
}

input, select, button {
  width: 94%;
  margin: 10px 0;
  padding: 10px;
}