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

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  padding: 20px;
  background-color: #f9f9f9;
  color: #333;
}

nav ul {
  display: flex;
  gap: 15px;
  list-style: none;
  background: #222;
  padding: 10px;
  border-radius: 5px;
}

nav ul li a {
  color: white;
  text-decoration: none;
  padding: 5px 10px;
  border-radius: 4px;
  transition: background 0.3s ease;
}

nav ul li a:hover {
  background: #555;
}

header {
  margin: 20px 0;
}

h1 {
  font-size: 2.5em;
  color: #900;
}

h2 {
  font-size: 1.5em;
  color: #333;
}

h3 {
  margin-top: 20px;
  color: #444;
}

img.rounded {
  max-width: 100%;
  margin-top: 10px;
  border-radius: 10px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

footer {
  margin-top: 30px;
  text-align: center;
  color: #666;
  font-size: 0.9em;
}