.site-header-inner {
  background: linear-gradient(#3b3b3b, #616161);
}

h1 {
  color: #1e1e1e;
  text-align: center;
}

h2 {
  text-align: center;
}

.site-branding {
  margin-left: 50px;
}

.footer-info {
  text-align: center;
}

.table-of-contents.open {
  background-color: #e9e9ea;
  border-radius: 20px;
}