/* ontopraxis — Borders, shadows, grid device.
   Prefer 1px borders to shadows; reserve shadows for floating overlays and review gates. */
:root {
  --border-width: 1px;
  --border-active: 2px; /* active path / selected route */

  /* Shadows — soft and shallow, used sparingly */
  --shadow-overlay: 0 8px 24px rgba(31,35,40,0.12);
  --shadow-float: 0 16px 48px rgba(1,4,9,0.20);
  --shadow-dark: 0 28px 80px rgba(0,0,0,0.40);

  /* Praxis Grid — fine modular structure (background-image) */
  --grid-line-light: rgba(31,35,40,0.05);
  --grid-line-dark: rgba(255,255,255,0.045);

  /* Motion */
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1); /* @kind other */
  --duration-ui: 200ms;       /* @kind other */ /* interface feedback: 160–240ms */
  --duration-explain: 700ms;  /* @kind other */ /* explanatory sequences: 500–900ms */
}