html {
  --base-font-size: 14px; /* Must be in pixels */
  --base-line-height: 1.3; /* Must be a decimal number */
  --base-scale-factor: 1.618; /* Must be a decimal number */
  --base-units: px; /* px, rem, em */
  font-size: var(--base-font-size); /* html/root font-size must be defined as the base font size when using em or rem, or the grid won't be pixel perfect */
  line-height: var(--base-line-height);
}
body {
  font-family: sans-serif;
  font-size: 14px;
  line-height: 18px;
  max-width: 560px;
  margin: auto;
}
h1 {
  font-size: 59px;
  line-height: 72px;
  margin-top: 18px;
  margin-bottom: 36px;
}
h2 {
  font-size: 37px;
  line-height: 54px;
  margin-top: 18px;
  margin-bottom: 18px;
}
h3 {
  font-size: 23px;
  line-height: 36px;
  margin-top: 18px;
  margin-bottom: 0px;
}
h4 {
  font-size: 14px;
  line-height: 18px;
  margin-top: 18px;
  margin-bottom: 0px;
}
h5 {
  font-size: 14px;
  line-height: 18px;
  margin-top: 18px;
  margin-bottom: 0px;
}
p, ul, ol, pre , table, blockquote {
  margin-top: 0px;
  margin-bottom: 18px;
}
ul ul, ol ol, ul ol, ol ul {
  margin-top: 0px;
  margin-bottom: 0px;
}

/* Let's make sure all's aligned */
hr {
  border: 1px solid;
  margin: -1px 0;
}
a, b, i, strong, em, small, code {
  line-height: 18px;
}
sub, sup {
  line-height: 18px;
  position: relative;
  vertical-align: baseline;
}
sup {
  top: -0.5em;
}
sub {
  bottom: -0.25em;
}