.menu{
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(0,0,0,0.75);
  z-index: 10;
}

.menu img{
  display: block;
  margin: 0 auto;
}

.blog_thumbnail {
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  width: 100%;
  height: 100%;
  border-top-left-radius: 20px;
  border-top-right-radius: 20px;
}

.artificial_space{
  margin-top: 5rem;
}