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

body {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 20px 60px;
  font-family: 'Georgia', 'Times New Roman', serif;
  font-size: 17px;
  line-height: 1.7;
  color: #1a1a1a;
  background: #fff;
}

nav {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  font-size: 14px;
  padding: 20px 0;
  margin-bottom: 20px;
}

nav a {
  color: #888;
  text-decoration: none;
}

nav a:hover {
  color: #111;
}

h1 {
  font-family: 'Helvetica Neue', 'Arial', sans-serif;
  font-size: 2.4em;
  line-height: 1.15;
  margin-bottom: 0.1em;
  color: #111;
}

h2 {
  font-family: 'Helvetica Neue', 'Arial', sans-serif;
  font-size: 1.5em;
  margin-top: 2em;
  margin-bottom: 0.5em;
  color: #222;
  border-bottom: 2px solid #e0e0e0;
  padding-bottom: 0.3em;
}

h3 {
  font-family: 'Helvetica Neue', 'Arial', sans-serif;
  font-size: 1.15em;
  margin-top: 1.5em;
  color: #333;
}

p {
  margin-bottom: 1.2em;
}

em {
  font-style: italic;
}

strong {
  font-weight: 700;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 1.8em auto;
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

hr {
  border: none;
  border-top: 1px solid #ccc;
  margin: 2.5em 0;
}

ul {
  margin-bottom: 1.2em;
  padding-left: 1.5em;
}

li {
  margin-bottom: 0.4em;
}

blockquote {
  font-family: 'Helvetica Neue', 'Arial', sans-serif;
  font-size: 1.2em;
  line-height: 1.4;
  color: #222;
  border-left: none;
  border-top: 3px solid #4E79A7;
  border-bottom: 3px solid #4E79A7;
  padding: 0.8em 1.5em;
  margin: 1.8em 1.5em;
  text-align: center;
  font-style: italic;
}

blockquote p {
  margin: 0;
}

.byline {
  font-family: 'Helvetica Neue', 'Arial', sans-serif;
  font-size: 0.95em;
  color: #666;
  margin-bottom: 2em;
  margin-top: 0.2em;
}

.methodology {
  font-size: 0.82em;
  color: #666;
  line-height: 1.5;
  border-top: 1px solid #ddd;
  padding-top: 1em;
  margin-top: 2em;
}

@media (max-width: 600px) {
  body {
    font-size: 15px;
    padding: 0 16px 40px;
  }

  h1 {
    font-size: 1.8em;
  }

  h2 {
    font-size: 1.3em;
  }

  img {
    margin: 1.2em auto;
  }
}