body {
  margin: 0;
  padding: 0;
}

.header {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.image-container {
  position: relative;
  width: 100%;
  height: auto;
}

.header-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  image-rendering: auto; /* mejora calidad */
}

/* Olas encima de la imagen */
.waves {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100px;
  z-index: 2;
  pointer-events: none;
}

/* Animación */
.parallax > use {
  animation: move-forever 25s cubic-bezier(.55,.5,.45,.5) infinite;
}
.parallax > use:nth-child(1) { animation-delay: -2s; animation-duration: 7s; }
.parallax > use:nth-child(2) { animation-delay: -3s; animation-duration: 10s; }
.parallax > use:nth-child(3) { animation-delay: -4s; animation-duration: 13s; }
.parallax > use:nth-child(4) { animation-delay: -5s; animation-duration: 20s; }

@keyframes move-forever {
  0% { transform: translate3d(-90px, 0, 0); }
  100% { transform: translate3d(85px, 0, 0); }
}

/* Responsive */
@media (max-width: 768px) {
  .waves {
    height: 60px;
  }
}