body {
  background: #3a3a3a;
  font-family: Arial, sans-serif;
  font-size: 16px;
  color: #f0f0f0;
  margin: 2em auto;
  max-width: 800px;
  line-height: 1.6;
  padding: 0 1em;
}

header h1 {
  font-size: 2em;
  color: #ffffff;
  text-align: center;
  margin-bottom: 1em;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 1.5em;
  margin-bottom: 2em;
  padding: 0;
}

nav ul li a {
  color: #66ccff;
  font-weight: bold;
  text-decoration: none;
}

nav ul li a:hover {
  color: #ffffff;
  text-decoration: underline;
}

h2 {
  font-size: 1.4em;
  color: #dddddd;
  margin-top: 2em;
}

h3 {
  font-size: 1.2em;
  color: #cccccc;
  margin-top: 1.5em;
}

a {
  color: #66ccff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
  color: #99ddff;
}

ul {
  margin-left: 1.2em;
  padding-left: 1em;
}

ul li {
  margin-bottom: 0.5em;
}