body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
  color: #333;
  margin: 0;
  padding: 0;
}

header {
  background: #556b2f;
  color: white;
  text-align: center;
  padding: 2rem 1rem;
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

section {
  margin-bottom: 2rem;
}

h2 {
  color: #6b8e23;
  border-bottom: 2px solid #cddc39;
  padding-bottom: 0.5rem;
}

p, ul {
  line-height: 1.6;
}

ul {
  list-style: square;
  padding-left: 1.5rem;
}

li strong {
  color: #556b2f;
}

footer {
  text-align: center;
  background: #f0f0f0;
  padding: 1rem;
  font-style: italic;
  color: #555;
  border-top: 1px solid #ddd;
}

@media (max-width: 600px) {
  main {
    margin: 1rem;
    padding: 1.5rem;
  }
  header h1 {
    font-size: 2rem;
  }
}