/* ============================================================
   SPACING, SIZING & RADII — fromSpec
   4px grid. Radii are SHARP and architectural — this is a
   drafting-table system, not a soft one. Corners stay crisp.
   ============================================================ */
:root {
  --space-0:   0;
  --space-px:  1px;
  --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 */

  /* radii — crisp/architectural */
  --radius-xs:   2px;
  --radius-sm:   3px;    /* spec blocks, chips */
  --radius-md:   5px;    /* default control / card */
  --radius-lg:   7px;    /* buttons, panels */
  --radius-xl:   12px;   /* large cards */
  --radius-2xl:  16px;   /* hero / cta cards */
  --radius-pill: 100px;
  --radius-circle: 50%;

  /* control heights */
  --control-sm: 30px;
  --control-md: 38px;
  --control-lg: 46px;

  /* layout */
  --container-max: 1180px;
  --content-max:   1180px;   /* single structural field — left-spine; bump to 1320px for a wider field */
  --sidebar-w:     248px;
  --grid-size:     64px;   /* drafting-grid cell */
  --titlebar-h:    44px;
}