body {
  background: #fff;
  color: #111;
  font-family: 'Georgia', 'Times New Roman', Times, serif;
  margin: 0;
  padding: 0;
}

main {
  max-width: 700px;
  margin: 60px auto 0 auto;
  padding: 40px 20px 60px 20px;
  background: #fff;
  box-sizing: border-box;
}

h1, h2, h3 {
  font-weight: bold;
  margin-top: 2em;
  margin-bottom: 0.5em;
}

h1 {
  font-size: 2em;
  text-align: center;
  margin-top: 0;
}

h2 {
  font-size: 1.3em;
  margin-top: 2em;
}

h3 {
  font-size: 1.1em;
  margin-top: 1.5em;
}

p, ul, ol {
  font-size: 1.05em;
  line-height: 1.7;
  margin-bottom: 1.2em;
}

ul, ol {
  padding-left: 1.5em;
}

a {
  color: #1a0dab;
  text-decoration: underline;
}

a:hover {
  text-decoration: underline dotted;
}

pre, code {
  background: #f8f8f8;
  color: #222;
  font-family: 'Fira Mono', 'Consolas', 'Menlo', monospace;
  font-size: 0.98em;
  border-radius: 4px;
  padding: 1em 1.2em;
  margin: 1em 0;
  overflow-x: auto;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.7;
  padding: 1em 1.2em;
  margin: 1em 0;
  overflow-x: auto;
}

code {
  line-height: 1.7;
  padding: 0.2em 0.4em;
}

@media (max-width: 800px) {
  main {
    max-width: 98vw;
    padding: 10vw 2vw 10vw 2vw;
  }
  h1 {
    font-size: 1.3em;
  }
  h2 {
    font-size: 1.1em;
  }
}