/* Blueprint to Broadcast — Spacing, Radii, Borders, Shadows, Motion
   ------------------------------------------------------------------
   The blueprint voice favours crisp hairline borders and fine grids
   over heavy shadows. Radii are restrained (drafting precision), not
   pill-soft. Shadows are subtle and cool-tinted. */

:root {
  /* ---- Spacing (4px base) ---- */
  --space-0:  0;
  --space-1:  0.25rem;  /* 4  */
  --space-2:  0.5rem;   /* 8  */
  --space-3:  0.75rem;  /* 12 */
  --space-4:  1rem;     /* 16 */
  --space-5:  1.5rem;   /* 24 */
  --space-6:  2rem;     /* 32 */
  --space-7:  3rem;     /* 48 */
  --space-8:  4rem;     /* 64 */
  --space-9:  6rem;     /* 96 */
  --space-10: 8rem;     /* 128 */

  /* layout */
  --container:    1200px;
  --container-sm: 760px;
  --gutter:       var(--space-5);
  --section-y:    var(--space-9);

  /* ---- Radii (square-leaning, drafting precision) ---- */
  --radius-xs:   2px;
  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   12px;
  --radius-xl:   18px;
  --radius-pill: 999px;
  --radius-circle: 50%;

  /* ---- Border widths ---- */
  --border-hair: 1px;
  --border-thick: 2px;

  /* ---- Shadows (cool-tinted, subtle) ---- */
  --shadow-xs: 0 1px 2px rgba(26,34,45,0.06);
  --shadow-sm: 0 1px 3px rgba(26,34,45,0.08), 0 1px 2px rgba(26,34,45,0.05);
  --shadow-md: 0 4px 14px rgba(26,34,45,0.08), 0 2px 5px rgba(26,34,45,0.05);
  --shadow-lg: 0 14px 40px rgba(26,34,45,0.12), 0 4px 12px rgba(26,34,45,0.07);
  --shadow-signal: 0 8px 26px rgba(9,93,199,0.26);     /* cobalt glow on brand CTAs */
  --shadow-focus:  0 0 0 3px rgba(9,93,199,0.22);       /* focus ring */

  /* ---- Motion ---- */
  --ease-out:   cubic-bezier(0.22, 1, 0.36, 1); /* @kind other */
  --ease-inout: cubic-bezier(0.65, 0, 0.35, 1); /* @kind other */
  --ease-signal: cubic-bezier(0.16, 1, 0.3, 1); /* @kind other */
  --dur-fast:   140ms; /* @kind other */
  --dur-base:   240ms; /* @kind other */
  --dur-slow:   440ms; /* @kind other */

  /* ---- Blueprint grid background (drop onto any surface) ---- */
  --grid-size: 28px; /* @kind spacing */
}