body {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
  font-family: -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  color: #444;
}

main {
  display: block;
  position: relative;
}

h1, h2, h3, h4 {
  color: #333;
}

href {
  color: #0066cc;
}

code {
  background: #f4f4f4; 
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
}

pre { 
  background: #f4f4f4; 
  padding: 1rem; 
  border-radius: 5px; 
  overflow-x: auto; 
}
        
blockquote { 
  border-left: 3px solid #ddd; 
  padding-left: 1rem; 
  margin-left: 0; 
}
      
a { 
  color: #0066cc; 
  text-decoration: none; 
}
        
a:hover { 
  text-decoration: underline; 
}

/* Navigation Styles */

nav a {
  text-decoration: none;
  color: #666;
}

nav a.current {
  font-weight: bold;
  color: #333;
}

/* Table of Contents Styles */

.toc-toggle {
  display: none;
}

#TOC {
  padding: 0;
}

#TOC::before {
  content: "Contents ▼";
  display: block;
  font-size: 0.8rem;
  color: #999;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  font-weight: 400;
  cursor: pointer;
  user-select: none;
  transition: color 0.15s ease;
}

#TOC::before:hover {
  color: #666;
}

.toc-toggle:checked + label #TOC::before {
  content: "Contents ►";
}

#TOC ul {
  margin: 0;
  padding: 0;
  list-style: none;
  transition: all 0.3s ease;
  overflow: hidden;
}

.toc-toggle:checked + label #TOC ul {
  max-height: 0;
  opacity: 0;
  margin: 0;
}

#TOC li {
  margin: 0.4rem 0;
}

#TOC li ul {
  margin-top: 0.2rem;
  padding-left: 0.8rem;
}

#TOC a {
  color: #555;
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 300;
  line-height: 1.4;
  transition: color 0.15s ease;
}

#TOC a:hover {
  color: #000;
}

/* Table Styles */

table {
  border-collapse: collapse;
  margin: 1.5rem auto;
  font-size: 0.9rem;
}

th, td {
  padding: 0.5rem 1rem;
  text-align: left;
  border-bottom: 1px solid #ddd;
}

th {
  background: #f4f4f4;
  font-weight: 600;
  color: #222;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

tbody tr:hover {
  background: #f9f9f9;
}

tbody tr:nth-child(even) {
  background: #fafafa;
}

tbody tr:nth-child(even):hover {
  background: #f4f4f4;
}

td {
  color: #333;
  line-height: 1.2;
}

/* Paper */

.paper h4 {
  margin-bottom: 0.2em;
  font-weight: 500;
}

.paper h4 + p {
  color: #777;
  font-size: 0.9rem;
  margin: 0 0 0.8em 0;
}