/* RBC Quest — Spacing, radii, shadows, motion. */
:root{
  /* Spacing (4px base) */
  --space-0:  0;
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Radii — rounded but not childish */
  --radius-sm:   6px;
  --radius:      10px;   /* default — cards, buttons (restrained for adults) */
  --radius-lg:   14px;
  --radius-xl:   18px;
  --radius-pill: 999px;  /* chips, coins, progress bars */

  /* Elevation — soft, blue-tinted shadows (never harsh black) */
  --shadow-sm:  0 1px 2px rgba(20,33,61,.06), 0 1px 3px rgba(20,33,61,.08);
  --shadow-md:  0 2px 8px rgba(20,33,61,.08), 0 4px 16px rgba(20,33,61,.06);
  --shadow-lg:  0 8px 24px rgba(20,33,61,.10), 0 16px 40px rgba(20,33,61,.08);
  --shadow-brand: 0 6px 20px rgba(0,93,170,.28); /* blue glow on primary CTAs */
  --shadow-reward: 0 6px 18px rgba(255,210,0,.40); /* yellow glow on reward moments */

  /* Motion — calm easing; a light bounce reserved for reward moments only */
  --ease-standard: cubic-bezier(.4,0,.2,1); /* @kind other */
  --ease-out:      cubic-bezier(.16,1,.3,1); /* @kind other */
  --ease-bounce:   cubic-bezier(.34,1.56,.64,1); /* @kind other */
  --dur-fast:   120ms; /* @kind other */
  --dur-base:   200ms; /* @kind other */
  --dur-slow:   360ms; /* @kind other */
}