* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui;
  font-size: 1rem;
  font-weight: normal;
  line-height: 1.5;
  margin: 0;
  max-width: 70ch;
  padding: 1rem;
}

h1,
h2,
h3 {
  font-family: Helvetica, sans-serif;
  font-weight: bold;
}

h1 {
  font-size: 3rem;
  line-height: 4rem;
}

.content > * + * {
  margin-top: 1em;
}

ul {
  padding-left: 1.5em;
}

li > ul > li {
  margin-top: 0;
}