:root {
  --ease-out:  cubic-bezier(0.22, 1, 0.36, 1);   /* default: things settle, never bounce */
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 160ms;     /* hover, color */
  --dur-base: 320ms;     /* reveal, underline grow */
  --dur-slow: 720ms;     /* image fade-in, section enter */
  --dur-story: 1200ms;   /* line draw between story beats */

  /* Interaction states */
  --hover-opacity: 0.72;          /* text links, image cards */
  --press-scale: 0.985;           /* buttons */
  --image-hover-scale: 1.02;      /* product imagery, slow */
}