body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f5f5;
  color: #333;
}

header {
  background-color: #2c3e50;
  color: white;
  padding: 1rem;
  text-align: center;
}

nav {
  margin-top: 0.5rem;
}

nav a {
  color: #ecf0f1;
  margin: 0 1rem;
  text-decoration: none;
}

main {
  padding: 2rem;
}

form {
  max-width: 500px;
  margin: auto;
  display: flex;
  flex-direction: column;
}

input, textarea, button {
  margin-bottom: 1rem;
  padding: 0.5rem;
  font-size: 1rem;
}

button {
  background-color: #2980b9;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background-color: #3498db;
}

footer {
  text-align: center;
  background-color: #2c3e50;
  color: white;
  padding: 1rem;
  margin-top: 2rem;
}

@media (max-width: 600px) {
  main {
    padding: 1rem;
  }

  nav a {
    display: block;
    margin: 0.5rem 0;
  }
}