body {
  font-size: 16px;
  line-height: 2;
  color: brown;
  padding: 0px;
  margin: 0px;
}

#home {
  background-image: url("../images/winter.jpg");
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}
#puppies {
  background-image: url("../images/beach.jpg");
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}

#kittens {
  background-image: url("../images/aurora.jpg");
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}
img {
  width: 30%;
  display: block;
  margin: 10px auto;
}

.container {
  width: 80%;
  margin: 10px auto;
  border: 2px solid orange;
  padding: 5px;
  background: rgba(255, 255, 255, 0.8);
}