.blog {
  background-image: url('../images/blog_background.png');
  background-position: center;
  background-attachment: fixed;
  background-size: cover;
  width: 100%;
  margin: 0;
}
.post {
  padding: 0;
}
.post_header {
  overflow: hidden;
  height: 200px;
}

.opacity {
  opacity: .5;
}