/* ── Shadow tokens ─────────────────────────────────────────────
   Elevation is a whisper, not a spotlight. Two tokens are enough:
   a resting card shadow, and the slightly stronger one it eases
   into on hover. Avoid heavy shadows - they read as consumer
   landing-page decoration, not engineering-oriented calm.
*/
:root {
    --shadow-card: 0 6px 24px rgba(17, 24, 39, .06);
    --shadow-hover: 0 12px 32px rgba(17, 24, 39, .10);
}