body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f5f7fa;
  color: #333;
}

header {
  background: #1e293b;
  color: white;
  text-align: center;
  padding: 40px 20px;
}

section {
  max-width: 800px;
  margin: 30px auto;
  padding: 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

h2 {
  margin-top: 0;
}

button {
  padding: 10px 20px;
  border: none;
  background: #2563eb;
  color: white;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

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