:root {
  --page-surface: #ffffff;
  --page-surface-muted: #f8fafc;
  --page-border: rgba(15, 23, 42, 0.08);
}

.page-shell {
  background: var(--page-surface-muted);
  min-height: 100vh;
}

.page-card {
  background: var(--page-surface);
  border: 1px solid var(--page-border);
  border-radius: 16px;
}