/* ============================================================
   Lustre spacing, radius, motion
   4pt base unit, 8pt primary grid.
   ============================================================ */

:root {
  --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;

  /* Layout */
  --layout-margin: 20px;       /* iPhone side margins (16–20) */
  --touch-target: 44px;        /* HIG minimum */
  --touch-target-comfy: 48px;  /* preferred for non-tech-native users */

  /* Corner radii — soft, warm, never sharp */
  --radius-sm: 8px;    /* chips, badges, small controls */
  --radius-md: 12px;   /* buttons, inputs */
  --radius-lg: 16px;   /* cards */
  --radius-xl: 20px;   /* sheets, photos, report cover */
  --radius-pill: 999px;

  /* Motion — quick, calm, no bounce */
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1); /* @kind other */
  --duration-fast: 120ms; /* @kind other */
  --duration-base: 200ms; /* @kind other */
  --duration-slow: 320ms; /* @kind other */
}