body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #f9f9f9;
  color: #333;
}

header {
  background: #2c3e50;
  color: white;
  padding: 20px;
  text-align: center;
}

main {
  padding: 30px;
  max-width: 800px;
  margin: auto;
}

h2 {
  color: #2c3e50;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  background: #3498db;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background: #2980b9;
}

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

li a {
  display: block;
  margin: 10px 0;
  font-weight: bold;
  color: #3498db;
  text-decoration: none;
}

li a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 20px;
  font-size: 14px;
  color: #777;
}

.back-button {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 15px;
  background: #2c3e50;
  color: white;
  text-decoration: none;
  border-radius: 5px;
}

.back-button:hover {
  background: #34495e;
}