.article-container {
  display: flex;
  justify-content: center;
  padding: 1.25rem; /* relative padding */
}

.about {
  max-width: 43.75rem; /* ~700px */
  font-family: Georgia, serif;
  line-height: 1.6;
  font-size: 1rem; /* equals user's base font size */
  color: #222;
  background-color: #fff;
  padding: 1.875rem; /* relative padding */
  box-shadow: 0 0 0.625rem rgba(0, 0, 0, 0.1);
  flex: 1 1 auto;
}

.about p {
  margin-bottom: 1.2em;
}

@media (max-width: 48rem) {
  .article-container {
    padding: 0.625rem;
  }
  .about {
    font-size: 0.9rem; /* slightly smaller for smaller screens */
    padding: 1.25rem;
    max-width: 100%;
  }
}