.hero {
  position: relative;
  width: 100%;
  height: 65vh;
  background-image: url('https://stream.hinatou.com/banner_site.jpg');
  background-position: center center;
  background-size: cover;
  background-repeat: no-repeat;
  overflow: hidden;
}

/* Dégradé en bas */
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 35%;
  background: linear-gradient(
    to bottom,
    rgba(10,10,10,0) 0%,
    rgba(10,10,10,0.7) 60%,
    #0a0a0a 100%
  );
  pointer-events: none;
}

/* MOBILE */
@media (max-width: 768px) {
  .hero {
    height: auto;
    aspect-ratio: 16 / 9;
    background-image: url('https://stream.hinatou.com/banner_mobil.jpg');
    background-position: center top;
    background-size: contain; 
    background-color: #0a0a0a;
  }

  .hero::after {
    height: 30%;
  }
}