body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f8f9fa;
  color: #333;
}
header {
  background: #2c3e50;
  color: #fff;
  padding: 1rem;
}
h1 {
  margin: 0;
  font-size: 2rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 1.5rem;
  text-align: center;
}

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

article {
  background: #fff;
  padding: 1.5rem;
  margin-bottom: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
article h2 {
  margin-top: 0;
  color: #2c3e50;
}
footer {
  text-align: center;
  padding: 1rem;
  background: #2c3e50;
  color: #fff;
  margin-top: 2rem;
}