:root {
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.10);
  --transition-fast: 150ms cubic-bezier(.4,0,.2,1);
  --transition-base: 200ms cubic-bezier(.4,0,.2,1);
}