:root{ --hue: 182 } /* animated by JS */
#hero-title{ color: hsl(var(--hue),100%,75%) }
.tile:hover,.card:hover{
  box-shadow: 0 0 0 1px hsla(var(--hue),100%,60%,.35), 0 16px 38px rgba(0,0,0,.55);
}