body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif;
  line-height: 1.7;
  color: #333;
  background-color: #f5f5f5;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  background: #ffffff;
  padding: 50px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  border-radius: 4px;
}

h1 {
  color: #1a1a1a;
  border-bottom: 3px solid #007bff;
  padding-bottom: 15px;
  margin-bottom: 40px;
  font-size: 2.2em;
}

h2 {
  color: #0056b3;
  margin-top: 45px;
  margin-bottom: 20px;
  border-bottom: 2px solid #e9ecef;
  padding-bottom: 10px;
  font-size: 1.6em;
}

h2:first-of-type {
  margin-top: 0;
}

h3 {
  color: #495057;
  margin-top: 30px;
  margin-bottom: 15px;
  font-size: 1.2em;
}

p {
  margin: 12px 0;
  line-height: 1.8;
}

pre {
  background-color: #282c34;
  color: #abb2bf;
  padding: 18px;
  border-radius: 6px;
  overflow-x: auto;
  font-family:
    "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
  font-size: 0.9em;
  margin: 18px 0;
  border-left: 4px solid #007bff;
}

code {
  font-family: inherit;
}

a {
  color: #007bff;
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #0056b3;
  text-decoration: underline;
}

section {
  margin-bottom: 50px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  body {
    padding: 10px;
  }

  .container {
    padding: 25px;
    border-radius: 0;
    box-shadow: none;
  }

  h1 {
    font-size: 1.8em;
    padding-bottom: 10px;
  }

  h2 {
    font-size: 1.3em;
    margin-top: 30px;
  }

  h3 {
    font-size: 1.1em;
  }

  pre {
    font-size: 0.85em;
    padding: 12px;
  }
}