*{box-sizing:border-box;}

body {
  font-family: "Arial", "Helvetica", sans-serif;
  margin: 0;
  width: 100%;
}

header {
  background-color: black;
  color: white;
  padding: 6px 15px;
}
header a { 
  color: #fff;
  cursor: pointer;
  text-decoration: none;
}
header a:hover, header a:focus {
  text-decoration: underline;
}
.logo {
  font-size: 16px;
  font-weight: bold;
  margin-left: 4px;
}

main, footer {
  font-size: 16px;
  max-width: 650px;
  padding: 0 15px;
}

h2, h3 { margin: 2rem 0 0; }
h2 { 
  font-size: 18px; 
}

h3 {
  font-size: 16px;
}

img{height:auto;max-width:100%;}
img.puffy-logo{max-width:120px;}

figure { margin: 2.5rem auto; }
figcaption { text-align: center; }

pre, p code, li code { font-size: 14px; }

pre {
  background: #f2f2f2;
  padding: 6px;
  overflow: auto;
}

@media(prefers-color-scheme: dark) {
  body {
    background-color: #2e2e2e;
  }
  header {
    background-color: white;
    color: black;
  }
  header a { 
    color: black;
  }
  header a:hover, header a:focus {
    text-decoration: underline;
  }
  pre {
    background: black;
  }
  blockquote {
    color: lightgoldenrodyellow;
  }
}