body, html {
  height: 100%;
  margin: 0;
  padding: 0;
}

#backgroundCarousel {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
}

#backgroundCarousel .carousel-item {
  height: 100vh;
}

#backgroundCarousel .carousel-item img {
  object-fit: cover;
  height: 100%;
  width: 100%;
  filter: brightness(0.85);
}

.form-box {
  background: rgba(144, 238, 144, 0.85); /* vert clair, transparent */
  max-width: 450px;
  width: 100%;
  margin: 0 auto;
}

.form-content {
  position: relative;
  z-index: 1;
  background: rgba(144, 238, 144, 0.85);
  padding: 1.5rem;
  border-radius: 0.375rem;
}

.footer {
  background: rgba(255,255,255,0.7);
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 10;
}

@media (max-width: 576px) {
  .form-box { padding: 1.5rem 0.5rem; }
  .container { padding: 0 0.5rem; }
}