themes/docsy/static/css/shortcodes/tabbed-pane.css

.td-content .highlight {
  margin: 0rem 0 2rem 0;
}

.tab-content .highlight {
  border: none;
}

.tab-content {
  margin: 0rem;
  max-width: 80%;
}

.tab-content pre {
  border-left: 1px solid rgba(0, 0, 0, 0.125);
  border-right: 1px solid rgba(0, 0, 0, 0.125);
  border-bottom: 1px solid rgba(0, 0, 0, 0.125);
}