/* ============================================================
   PRGRSS — Radius, elevation, motion
   Minimal + precise: small radii, restrained shadows, subtle blue glow.
   ============================================================ */
:root {
  /* Corner radii — sharp & tidy */
  --radius-none: 0;
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-pill: 999px;

  /* Interactive controls — buttons & form fields */
  --radius-control: 0.25rem; /* @kind other */

  /* Borders */
  --border-width: 1px; /* @kind other */
  --border-width-strong: 1.5px; /* @kind other */

  /* Elevation — on dark, shadow reads as depth + a faint blue-black */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.45);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.5);
  --shadow-lg: 0 20px 48px rgba(0,0,0,0.55);
  --shadow-xl: 0 32px 80px rgba(0,0,0,0.6);
  /* Accent glow — hover/focus on primary surfaces */
  --glow-accent: 0 0 0 1px rgba(16,99,255,0.4), 0 8px 32px rgba(16,99,255,0.28);
  --glow-accent-soft: 0 6px 24px rgba(16,99,255,0.18);

  /* Motion — brisk, confident, no bounce */
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1); /* @kind other */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1); /* @kind other */
  --ease-in: cubic-bezier(0.4, 0, 1, 1); /* @kind other */
  --dur-fast: 120ms; /* @kind other */
  --dur-base: 200ms; /* @kind other */
  --dur-slow: 360ms; /* @kind other */
  --dur-slower: 600ms; /* @kind other */
}