/* ============================================================
   Tech Rim Standards — Spacing, Sizing & Layout
   4px base unit. Industrial layouts favour generous gutters and
   strong horizontal rules.
   ============================================================ */
:root {
  --space-0:  0;
  --space-1:  0.25rem;  /* 4  */
  --space-2:  0.5rem;   /* 8  */
  --space-3:  0.75rem;  /* 12 */
  --space-4:  1rem;     /* 16 */
  --space-5:  1.25rem;  /* 20 */
  --space-6:  1.5rem;   /* 24 */
  --space-8:  2rem;     /* 32 */
  --space-10: 2.5rem;   /* 40 */
  --space-12: 3rem;     /* 48 */
  --space-16: 4rem;     /* 64 */
  --space-20: 5rem;     /* 80 */
  --space-24: 6rem;     /* 96 */
  --space-32: 8rem;     /* 128 */

  /* layout */
  --container-max: 1280px;
  --container-wide: 1440px;
  --container-prose: 68ch;
  --gutter: clamp(1.25rem, 4vw, 4rem); /* @kind spacing */

  /* control heights (44px min hit target) */
  --control-sm: 36px;
  --control-md: 44px;
  --control-lg: 52px;
}