.container {
  display: grid;
  gap: 2rem;
  grid-template-columns: auto auto auto;
}

.container:hover {
  .card:not(.card:hover ) {
    opacity: 0.3;
  }
}

html {
  background-image: url(blurrydust.png);
  background-repeat: no-repeat;
  height: 100vh;
  background-size: cover;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  width: 16rem;
  height: 6rem;
 
  border: 1px solid #f3f4f6;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  text-decoration: none;
  color: black;
  transition: 250ms ease-in-out;
  background: #f3f4f6;
}

img {
  max-width: 14rem;
  max-height: 4rem;
  scale: 1;
  background: f3f4f6;
  overflow: hidden;
  border-radius: 1rem;
  transition: 250ms ease-in-out;
}

.card:hover {
  img {
    scale: 1.1;
  }
}

.card:hover:not(.card:hover ) {
  opacity: 0.3;
}