* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f8f9fa;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}
.container {
  background: #fff;
  border-radius: 8px;
  padding: 2.5rem;
  max-width: 480px;
  width: 100%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  text-align: center;
}
.icon { font-size: 3rem; margin-bottom: 1rem; }
h1 { font-size: 1.5rem; color: #212529; margin-bottom: 0.75rem; }
p { color: #495057; line-height: 1.6; margin-bottom: 1rem; }
.hint { font-size: 0.875rem; color: #868e96; }