:root {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color-scheme: light dark;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f6f6f8;
}

.card {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  max-width: 360px;
  width: 100%;
  text-align: center;
}

.card h1 {
  font-size: 1.25rem;
  margin: 0 0 0.5rem;
}

.muted {
  color: #666;
  font-size: 0.85rem;
  word-break: break-all;
}

.error {
  color: #b00020;
  font-size: 0.9rem;
}

button {
  background: #1a73e8;
  color: white;
  border: none;
  border-radius: 8px;
  padding: 0.6rem 1.2rem;
  font-size: 0.95rem;
  cursor: pointer;
}

button:hover {
  background: #1558b0;
}