body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f6f7f9;
  color: #20242a;
}

main {
  max-width: 760px;
  margin: 64px auto;
  padding: 32px;
  background: #ffffff;
  border-radius: 18px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}