body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  background: #f8f9fa;
  color: #333;
}
header {
  background-color: #dc3545;
  color: white;
  padding: 1rem;
  text-align: center;
}
nav ul {
  list-style-type: none;
  padding: 0;
  display: flex;
  justify-content: center;
  background-color: #c82333;
  margin: 0;
}
nav ul li {
  margin: 0 15px;
}
nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: bold;
}
nav ul li a:hover {
  text-decoration: underline;
}
main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 1rem;
  background: white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  border-radius: 10px;
}
footer {
  text-align: center;
  padding: 1rem;
  background-color: #dc3545;
  color: white;
  margin-top: 2rem;
}