.post {
  padding-top: 5%;
}

.post .post_thumbnail {
  padding-bottom: 2%;
}

.post_thumbnail img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.post .ttl {
  text-align: center;
}

.content {
  padding-top: 2%;
  padding-bottom: 2%;
  font-size: 1.5rem;
}