/* ==========================================================================
   Cnam — Spacing, radii, layout
   The charte's structural principle is an "irregular white margin" (marge
   blanche irrégulière) around every support, plus generous breathing room.
   Spacing scale is a 4px base grid.
   ========================================================================== */
:root {
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px  */
  --space-2: 0.5rem;    /* 8px  */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.5rem;    /* 24px */
  --space-6: 2rem;      /* 32px */
  --space-7: 3rem;      /* 48px */
  --space-8: 4rem;      /* 64px */
  --space-9: 6rem;      /* 96px */
  --space-10: 8rem;     /* 128px */

  /* Section rhythm */
  --gutter: 1.5rem;
  --page-margin: 4vw;        /* the "irregular" outer margin baseline         */
  --container-max: 1200px;
  --content-max: 68ch;       /* readable measure                              */

  /* --- Radii — the brand is largely orthogonal; radii are small ----------- */
  --radius-none: 0;
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-pill: 999px;
  --radius-card: var(--radius-sm);

  /* --- Border widths ------------------------------------------------------ */
  --border-hair: 1px;
  --border-thin: 1.5px;
  --border-thick: 2px;
  --border-frame: 2px;       /* surtitre-encadré frame                        */
}