/* Supprime toute marge et empêche le scroll */
html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background-color: #000;
}

/* SLIDER plein écran fixe */
.slider {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  z-index: 0;
}

.slider img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.5s ease-in-out;
}

.slider img.active {
  opacity: 1;
}

/* MENU */
header {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 10;
}

header nav {
  display: flex;
  gap: 40px;
  align-items: center;
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 15px;
  text-transform: lowercase;
}

header nav a {
  text-decoration: none;
  color: #000000; /* blanc pour ressortir sur les images */
  transition: opacity 0.3s ease;
}

header nav a:hover {
  opacity: 0.6;
}