/* ============================================================
   Optima Digital — Radii, shadows, borders, motion
   ============================================================ */
:root {
  /* Corner radii — soft, modern, approachable */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 999px;

  /* Elevation — soft cool-tinted shadows (never pure black) */
  --shadow-xs: 0 1px 2px rgba(27, 33, 80, 0.06);
  --shadow-sm: 0 2px 6px rgba(27, 33, 80, 0.08);
  --shadow-md: 0 8px 24px rgba(27, 33, 80, 0.10);
  --shadow-lg: 0 18px 48px rgba(27, 33, 80, 0.14);
  --shadow-blue: 0 10px 30px rgba(18, 114, 196, 0.28);

  /* Borders */
  --border-width: 1px;
  --border-line: var(--border-width) solid var(--border-subtle);

  /* Motion */
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1); /* @kind other */
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1); /* @kind other */
  --dur-fast:   120ms; /* @kind other */
  --dur-base:   200ms; /* @kind other */
  --dur-slow:   360ms; /* @kind other */
}