* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: #1a1a1a;
  background: #ffffff;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  padding: 4rem 1rem 2rem;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

header p {
  font-size: 1.1rem;
  color: #555;
}

main {
  flex: 1;
  padding: 2rem 1rem;
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

footer {
  text-align: center;
  padding: 1.5rem 1rem;
  color: #888;
  font-size: 0.85rem;
}