body{
   font-size: 16px;
   line-height: 1.5em;
   font-family: mono;
   background: #f3f3f3;
   margin: 2em;
  }
  h1,h2,h3,h4 {
    padding: 0.5em;
  }
  h1 {
    font-family: math;
    text-decoration: unset;
    text-decoration-style: wavy;
    letter-spacing: 0.2em;
    text-transform: lowercase;
    border-top: 1px solid;
    border-bottom: 1px solid;
  }
  h2 {
    background: #ccccff;
  }
  sup {
    bottom: 0.5em;
    position: relative;
    margin: 0;
    padding: 0;
    vertical-align: bottom;
    font-size: 0.7em;
  }
  sup a{
    text-decoration:none;
  }
  blockquote{
    border: 1px solid gainsboro;
    padding: 1em;
    background: #ffffcc;
    box-shadow: 0px 5px 10px 0px #999;
    display:inline-block;
  }
  article {
    margin: 0em;
    line-height: 1.4em;
    text-indent: 2em;
    font-family: serif;
    font-size: 1.4em;
  }
  :target {
    background: yellow;
  }