body {
  display: grid;
  grid-template-columns: 1fr 600px 1fr;
  justify-items: center;
  font-size: 22px;
}

h1 {
  justify-items: center;
  display: grid;
  font-size: 24px;
}

main {
  grid-column-start: 2;
}

/* asterism in horizontal rule */
hr {
  border: none;
  border-top: 3px double;
  border-color: #333;
  color: #333;
  overflow: visible;
  text-align: center;
  height: 5px;
}
hr::after {
  background: #fff;
  content: '⁂';
  padding: 0 4px;
  position: relative;
  top: -13px;
}

ul {
  list-style-type: "❃ ";
}

code {
  font-size: 18px;
  font-style: italic;
}

@media (prefers-color-scheme: dark) {
  body {
    background: rgb(28, 27, 34);
    color: rgb(251, 251, 254);
    a:link {
      color:  rgb(0, 221, 255);
    }
    a:visited {
      color: #e675fd
    }
  }

  hr {
    border-color: rgb(251, 251, 254);
  }

  hr::after {
    background: rgb(28, 27, 34);
    color: rgb(251, 251, 254);
  }
}