body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f4f4f4;
  color: #222;
  margin: 0;
  padding: 0;
}

header, footer {
  background-color: #111;
  color: white;
  text-align: center;
  padding: 1rem;
}

main {
  padding: 2rem;
  max-width: 800px;
  margin: auto;
}

h1, h2 {
  color: #333;
}

ul {
  list-style-type: none;
  padding: 0;
}

li {
  background: #fff;
  margin: 0.5rem 0;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}