/* ============================================================
   ai-coustics · Spacing, radii, shadow, motion
   ------------------------------------------------------------
   8px base grid. Corner radii are gentle (the brand mark and
   wordmark are rounded) — never sharp, never pill on cards.
   Shadows are soft and low-contrast; the brand leans on flat
   surfaces + hairline borders more than elevation.
   ============================================================ */

:root {
  /* spacing — 8px grid (with 2/4 micro steps) */
  --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;
  --radius-lg: 18px;
  --radius-xl: 28px;
  --radius-pill: 999px;
  --radius-card: var(--radius-lg);

  /* hairline border width */
  --border-width: 1px;

  /* shadows — soft, neutral, cool-tinted */
  --shadow-xs: 0 1px 2px rgba(15, 15, 15, 0.05);
  --shadow-sm: 0 2px 8px rgba(15, 15, 15, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 15, 15, 0.08);
  --shadow-lg: 0 18px 48px rgba(15, 15, 15, 0.12);
  --shadow-focus: 0 0 0 3px rgba(0, 111, 255, 0.28);

  /* motion — quick, confident, no bounce */
  --ease-standard: cubic-bezier(0.2, 0, 0, 1); /* @kind other */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1); /* @kind other */
  --dur-fast: 120ms; /* @kind other */
  --dur-base: 200ms; /* @kind other */
  --dur-slow: 360ms; /* @kind other */

  /* layout */
  --container-max: 1200px;
  --container-wide: 1400px;
}