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

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background-color: #f8f8f8;
  color: #333;
  padding: 20px;
  max-width: 800px;
  margin: 0 auto;
}

header {
  background: #333;
  color: #fff;
  padding: 20px 0;
  text-align: center;
  border-radius: 8px;
}

header h1 {
  font-size: 2.5rem;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-top: 10px;
}

nav ul li {
  margin: 0;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  padding: 5px 10px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

nav ul li a:hover {
  background-color: #fff;
  color: #333;
  border-radius: 4px;
}

main {
  margin-top: 20px;
  padding: 20px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

main h2 {
  font-size: 2rem;
  margin-bottom: 10px;
}

main img {
  max-width: 100%;
  border-radius: 8px;
  margin: 20px 0;
}

main h3 {
  font-size: 1.5rem;
  margin-top: 20px;
  border-bottom: 2px solid #ccc;
  padding-bottom: 5px;
}

main p {
  margin: 10px 0;
}

main ul,
main ol {
  margin: 10px 0 20px;
  padding-left: 20px;
}

main ul li,
main ol li {
  margin-bottom: 8px;
  line-height: 1.4;
}