/* Reset some basic styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Body and layout */
body {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background-color: #ffffff;
  color: #222;
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

/* Headings */
h1, h2, h3, h4 {
  font-weight: 600;
  margin: 2rem 0 1rem;
  line-height: 1.25;
}

h1 {
  font-size: 2rem;
  border-bottom: 2px solid #eee;
  padding-bottom: 0.5rem;
}

h2 {
  font-size: 1.5rem;
  border-bottom: 1px solid #eee;
  padding-bottom: 0.25rem;
}

h3 {
  font-size: 1.25rem;
}

/* Links */
a {
  color: #0056b3;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Paragraphs and text */
p {
  margin-bottom: 1rem;
}

/* Lists */
ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

li {
  margin-bottom: 0.5rem;
}

/* Navigation */
nav {
  margin-bottom: 2rem;
}

nav a {
  margin-right: 1rem;
  font-weight: 500;
}

/* Sections */
section {
  margin-bottom: 3rem;
}

/* Footer */
footer {
  border-top: 1px solid #eee;
  padding-top: 1rem;
  margin-top: 3rem;
  font-size: 0.9rem;
  color: #666;
}

/* Images */
img {
  max-width: 100%;
  height: auto;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 2rem;
}

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

/* Code blocks */
code {
  font-family: Menlo, Monaco, Consolas, monospace;
  background: #f9f9f9;
  padding: 0.2em 0.4em;
  border-radius: 3px;
}

/* Highlighting */
mark {
  background-color: #fff9c4;
  color: inherit;
  padding: 0 0.15em;
  border-radius: 2px;
}

/* Responsive */
@media (max-width: 600px) {
  body {
    padding: 0 0.5rem;
  }
}