astro/examples/with-markdown-plugins/public/global.css

body {
  font-family: system-ui;
}

.content {
  max-width: 640px;
  margin: 40px auto;
  padding: 0 20px;
}

.title {
  position: relative;
}
.title a {
  position: absolute;
  display: block;
  height: 100%;
  width: 100%;
  color: inherit;
}

.title a:before {
  position: absolute;
  right: 100%;
  display: block;
  content: '#';
  margin-right: 0.2em;
  visibility: hidden;
  opacity: 0.5;
}

.title:hover a:before {
  visibility: visible;
}

.remark-code-title,
pre[class^='language-'] {
  padding: 10px;
  margin: 0;
}

.remark-code-title {
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 4px 4px 0 0;
  background: rgba(0, 0, 0, 0.08);
  font-family: monospace;
  font-weight: bold;
}

pre[class^='language-'] {
  background: rgba(0, 0, 0, 0.05);
  border-radius: 0 0 4px 4px;
}