body {
  font-family: Arial, sans-serif;
  background-color: #111;
  color: #eee;
  margin: 0;
  padding: 0;
}

header, footer {
  background-color: #222;
  padding: 20px;
  text-align: center;
}

header h1, footer p {
  margin: 0;
}

nav {
  background-color: #333;
  display: flex;
  justify-content: center;
}

nav a {
  color: #fff;
  padding: 14px 20px;
  text-decoration: none;
}

nav a:hover {
  background-color: #444;
}

main {
  padding: 20px;
  line-height: 1.7;
  max-width: 960px;
  margin: auto;
}

img {
  max-width: 100%;
  border-radius: 10px;
  margin: 10px 0;
}

.card {
  background-color: #1a1a1a;
  padding: 15px;
  margin: 10px 0;
  border-radius: 8px;
}