body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  background: #f7f8fa;
  color: #333;
}

header {
  background: #3b82f6;
  color: white;
  text-align: center;
  padding: 2rem 1rem;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

section {
  background: white;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

h2 {
  color: #2563eb;
}

button {
  background-color: #2563eb;
  color: white;
  border: none;
  padding: 0.7rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 1rem;
}

button:hover {
  background-color: #1d4ed8;
}

footer {
  background: #e5e7eb;
  text-align: center;
  padding: 1rem;
  font-size: 0.9rem;
  color: #555;
}