/* ============================================================
   STUDIE — SPACING, RADII, SIZING, LAYOUT
   The CD is geometric and sober: sharp corners, generous white
   space, a strict grid. Radii are minimal (square by default).
   Base unit = 4px.
   ============================================================ */
: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 */

  /* Radii — STUDIE is essentially square. Keep these tiny. */
  --radius-none: 0;
  --radius-sm: 2px;
  --radius-md: 3px;
  --radius-lg: 6px;
  --radius-pill: 999px;
  --radius-default: var(--radius-none);

  /* Border widths */
  --border-thin: 1px;
  --border-med:  1.5px;
  --border-thick: 2px;

  /* Container widths */
  --container-sm: 640px;
  --container-md: 880px;
  --container-lg: 1140px;
  --container-xl: 1320px;

  /* Control sizing */
  --control-height-sm: 32px;
  --control-height-md: 42px;
  --control-height-lg: 52px;

  /* The Versatz / Reglersystem signature graphic device.
     Vertical bars of varying height, derived from the STUDIE
     building facade. These drive the BarMark / VersatzPattern. */
  --versatz-bar-width: 10px;
  --versatz-gap: 6px;
}