.sidebar-img {
    border-radius: 50%;
    width: 10em;
}

.post-card {
    border: black solid 1px;
    padding: 1em;
    box-shadow: 0 4px 8px 0 rgba(0,0,0,0.2);
    transition: 0.3s;
}

.post-card:hover {
    box-shadow: 0 8px 16px 0 rgba(0,0,0,0.2);
}

.section-title {
    text-decoration: underline;
    padding: 0 1em 1em 0;
}

.introduction {
    padding-bottom: 2em;
}

@media (max-width: 48em) {
    .sidebar-nav-item img {
        margin: auto;
      }
  }