body {
  display: grid;
  justify-items: center;
}

main  {
  width: 800px;
  text-align: justify;
  line-height: 1.5;
  hyphenate-character: auto;
}

a {text-decoration: none;}
a:hover {color: green;}

h2 {text-align: center;}

h1 {font-size: 1.4em;}

li {margin: 0px 0px 20px 0px;}

details {
  background-color: antiquewhite;
  padding: 20px;
  margin: 0px 0px 20px 0px;
}

@media only screen and (max-width: 900px) {
  main {width: 95svw;}
}