:root{
  /* Borders — CKP structure is drawn with heavy ink rules, not shadow */
  --border-hair:1px;
  --border-regular:2px;
  --border-heavy:3px;
  --border-block:3px solid var(--ink);
  --border-field:2px solid var(--ink);

  /* Radius — the system is square. The only round thing is the logo badge. */
  --radius-none:0;
  --radius-badge:999px;

  /* Shadows — hard offset blocks only, never blurred */
  --shadow-block:5px 5px 0 var(--ink);
  --shadow-block-sm:3px 3px 0 var(--ink);
  --shadow-block-crimson:5px 5px 0 var(--ckp-crimson);
  --shadow-block-navy:5px 5px 0 var(--ckp-navy);
  --shadow-none:none;

  /* Focus */
  --focus-ring:3px solid var(--ckp-navy);
  --focus-offset:2px;
}