img {
  margin: auto;
  display: block;
}
li>a>img {
  display: inline-block;
}
img.orcid {
  display: inline-block;
}
.navbar-nav>.nav-item>.nav-link {
  background: transparent;
}
.navbar-nav>.active.nav-item>.nav-link {
  background: transparent;
}
.nav-text.text-muted {
  color: #fff !important;
}
.navbar-dark input[type="search"] {
  background: #555;
}

pre code span.cn {
  color: #69ce3d;
}
pre code span.fl {
  color: #69ce3d;
}
pre code span.st {
  color: #69ce3d;
}
pre code span.op {
  color: #df9af4;
}
pre code span.fu {
  color: #e1e4e8
}
pre code span.va {
  color: #e1e4e8
}