/* Base styles */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
  margin: 0;
  padding: 0;
}

.wrapper {
  max-width: 900px;
  margin-right: auto;
  margin-left: auto;
  padding-right: 30px;
  padding-left: 30px;
}

h1, h2, h3, h4, h5, h6 {
  margin-top: 30px;
  margin-bottom: 15px;
  line-height: 1.2;
}

h1 {
  font-size: 2.2em;
}

h2 {
  font-size: 1.8em;
  border-bottom: 1px solid #e8e8e8;
  padding-bottom: 0.3em;
  margin-top: 45px;
}

h3 {
  font-size: 1.5em;
}

h4 {
  font-size: 1.2em;
}

a {
  color: #2a7ae2;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

p, blockquote, ul, ol, dl, figure, table {
  margin-bottom: 15px;
}

ul, ol {
  margin-left: 30px;
}

li > ul, li > ol {
  margin-bottom: 0;
}

blockquote {
  border-left: 4px solid #e8e8e8;
  padding-left: 15px;
  margin-left: 0;
  font-style: italic;
  color: #666666;
}

/* Code formatting */
code, pre {
  font-family: "SF Mono", "Menlo", "Monaco", "Consolas", "Liberation Mono", "Courier New", monospace;
  font-size: 0.9em;
}

code {
  padding: 0.2em 0.4em;
  background-color: #f6f8fa;
  border-radius: 3px;
}

pre {
  padding: 15px;
  overflow-x: auto;
  background-color: #f6f8fa;
  border-radius: 3px;
}

pre > code {
  border: 0;
  padding: 0;
  background: none;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 30px;
}

table th, table td {
  padding: 8px;
  border: 1px solid #ddd;
}

table th {
  background-color: #f8f9fa;
  font-weight: bold;
}

table tr:nth-child(even) {
  background-color: #fafbfc;
}

/* Header and footer */
.site-header {
  border-bottom: 1px solid #e8e8e8;
  min-height: 56px;
  background-color: #f8f9fa;
}

.site-header .wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-title {
  font-size: 1.5em;
  font-weight: bold;
}

.site-title:hover {
  text-decoration: none;
}

.site-nav a {
  margin-left: 20px;
  color: #333;
}

.site-nav a:hover {
  color: #2a7ae2;
}

.site-footer {
  border-top: 1px solid #e8e8e8;
  padding: 30px 0;
  background-color: #f8f9fa;
  font-size: 0.9em;
  color: #666666;
}

/* Home page specific */
.home .book-banner {
  background-color: #d4e5ff;
  padding: 30px;
  border-radius: 5px;
  margin: 30px 0;
}

.home .book-banner h2 {
  margin-top: 0;
  border-bottom: none;
}

.home-content {
  padding: 20px 0;
}

/* Chapter specific */
.chapter .chapter-header {
  margin-bottom: 30px;
}

.chapter .chapter-navigation {
  display: flex;
  flex-direction: column;
  margin-top: 30px;
  padding-top: 30px;
  border-top: 1px solid #e8e8e8;
}

.chapter .chapter-navigation .nav-links {
  display: flex;
  justify-content: space-between;
}

.chapter .chapter-navigation .nav-links .prev,
.chapter .chapter-navigation .nav-links .next {
  padding: 10px 15px;
  background-color: #f6f8fa;
  border-radius: 4px;
}

.chapter .chapter-navigation .nav-links .prev:hover,
.chapter .chapter-navigation .nav-links .next:hover {
  background-color: #eaecef;
  text-decoration: none;
}

/* Responsive styles */
@media screen and (max-width: 600px) {
  .wrapper {
    padding-right: 15px;
    padding-left: 15px;
  }
  
  .site-header .wrapper {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .site-nav {
    margin-top: 10px;
  }
  
  .site-nav a {
    margin-left: 0;
    margin-right: 15px;
  }
  
  .chapter .chapter-navigation .nav-links {
    flex-direction: column;
  }
  
  .chapter .chapter-navigation .nav-links .next {
    margin-top: 10px;
  }
}