/* ============================================================
   Aeris One — Spacing, radii, shadows, motion, layout
   ============================================================ */

:root {
  /* ---- Spacing scale (4px base grid) ---- */
  --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 */

  /* ---- Radii ---- */
  --radius-xs:   4px;
  --radius-sm:   8px;
  --radius-md:   12px;   /* default control radius */
  --radius-lg:   16px;   /* cards */
  --radius-xl:   24px;   /* feature panels */
  --radius-2xl:  32px;
  --radius-pill: 999px;
  --radius-full: 50%;

  /* ---- Borders ---- */
  --border-width: 1px;
  --border-width-strong: 1.5px;

  /* ---- Shadows ----
     Soft, cool, violet-tinted. Layered for marketing depth. */
  --shadow-xs:  0 1px 2px rgba(21, 10, 40, 0.06);
  --shadow-sm:  0 1px 3px rgba(21, 10, 40, 0.08), 0 1px 2px rgba(21, 10, 40, 0.04);
  --shadow-md:  0 4px 12px rgba(21, 10, 40, 0.08), 0 2px 4px rgba(21, 10, 40, 0.04);
  --shadow-lg:  0 12px 28px rgba(21, 10, 40, 0.10), 0 4px 8px rgba(21, 10, 40, 0.05);
  --shadow-xl:  0 28px 60px rgba(21, 10, 40, 0.16), 0 8px 16px rgba(21, 10, 40, 0.06);
  /* Brand glow — for hero CTAs & floating app panels on dark */
  --shadow-brand: 0 16px 40px rgba(95, 37, 159, 0.35);
  --shadow-focus-inset: inset 0 0 0 1.5px var(--violet-500);

  /* ---- 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 */
  --dur-fast:   120ms; /* @kind other */
  --dur-base:   200ms; /* @kind other */
  --dur-slow:   360ms; /* @kind other */

  /* ---- Layout ---- */
  --container-max: 1200px;
  --container-narrow: 760px;
  --gutter: var(--space-5);
}