/* ============================================================
   SPACING, RADIUS, SHADOW, LAYOUT
   8px base grid. Italian PA layouts favour generous spacing,
   restrained radii and soft, low-contrast shadows.
   ============================================================ */
:root {
  /* Spacing — 8px grid (with 4px half-step) */
  --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 */

  /* Radius — restrained, institutional */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-pill: 999px;

  /* Borders */
  --border-width: 1px;
  --border-width-strong: 2px;
  --border-accent: 4px; /* left accent on callouts / active nav */

  /* Shadows — soft, cool-tinted */
  --shadow-xs: 0 1px 2px rgba(27, 28, 30, 0.06);
  --shadow-sm: 0 2px 6px rgba(27, 28, 30, 0.08);
  --shadow-md: 0 6px 18px rgba(27, 28, 30, 0.10);
  --shadow-lg: 0 14px 38px rgba(27, 28, 30, 0.14);
  --shadow-focus: 0 0 0 4px rgba(43, 43, 255, 0.35);

  /* Layout */
  --container-max: 1240px;
  --container-narrow: 720px; /* reading measure */
  --header-height: 80px;

  /* Motion */
  --ease-standard: cubic-bezier(0.2, 0, 0, 1); /* @kind other */
  --ease-out: cubic-bezier(0, 0, 0.2, 1); /* @kind other */
  --duration-fast: 120ms; /* @kind other */
  --duration-base: 200ms; /* @kind other */
  --duration-slow: 320ms; /* @kind other */
}