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

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  display: flex;
  min-height: 100vh;
  background-color: #f9f9f9;
}

/* Navbar Styles */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 250px;
  height: 100vh;
  background-color: #222;
  color: #fff;
  padding: 20px;
  overflow-y: auto;
  border-right: 2px solid #444;
}

#navbar header {
  font-size: 1.5rem;
  margin-bottom: 20px;
}

#navbar a {
  display: block;
  color: #ddd;
  text-decoration: none;
  margin: 10px 0;
  padding: 5px 10px;
  border-radius: 4px;
}

#navbar a:hover {
  background-color: #444;
  color: #fff;
}

/* Main Document Styles */
#main-doc {
  margin-left: 270px;
  padding: 20px;
  max-width: 900px;
}

.main-section {
  margin-bottom: 40px;
}

.main-section header {
  font-size: 1.8rem;
  color: #333;
  margin-bottom: 10px;
}

.main-section p {
  margin-bottom: 10px;
  color: #555;
}

.main-section code {
  display: block;
  background-color: #eee;
  padding: 10px;
  margin: 10px 0;
  border-left: 4px solid #ccc;
  font-family: monospace;
}

.main-section ul {
  margin-left: 20px;
  padding-left: 20px;
}

.main-section li {
  margin-bottom: 8px;
}

/* Responsive Styles */
@media (max-width: 768px) {
  body {
    flex-direction: column;
  }

  #navbar {
    position: relative;
    width: 100%;
    height: auto;
    border-right: none;
    border-bottom: 2px solid #444;
  }

  #main-doc {
    margin-left: 0;
  }
}