/* ============================================================
   ARKHENZ — RADIUS, ELEVATION & MOTION
   Minimal-futuristic: crisp corners, low-spread shadows,
   one signature "signal glow" for accent moments.
   ============================================================ */

:root {
  /* ---- radius — restrained, mostly small ---------------- */
  --radius-none: 0;
  --radius-xs:   3px;
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-pill: 999px;
  --radius-card: var(--radius-lg);

  /* ---- elevation — soft, cool, low-spread --------------- */
  --shadow-xs:  0 1px 2px rgba(6, 18, 13, 0.06);
  --shadow-sm:  0 2px 6px rgba(6, 18, 13, 0.08);
  --shadow-md:  0 8px 24px -8px rgba(6, 18, 13, 0.16);
  --shadow-lg:  0 24px 60px -18px rgba(6, 18, 13, 0.28);
  --shadow-inset: inset 0 1px 0 rgba(255, 255, 255, 0.6);

  /* signature accent glow — use sparingly on focus/CTA/active */
  --glow-signal:    0 0 0 1px color-mix(in srgb, var(--signal-500) 40%, transparent),
                    0 0 28px -6px color-mix(in srgb, var(--signal-500) 70%, transparent);
  --glow-signal-sm: 0 0 16px -4px color-mix(in srgb, var(--signal-500) 65%, transparent);

  /* focus ring */
  --focus-ring: 0 0 0 3px var(--ring);

  /* ---- borders ------------------------------------------ */
  --border-hairline: 1px;   /* @kind spacing */
  --border-thick: 2px;      /* @kind spacing */

  /* ---- motion — quick, confident, never bouncy ---------- */
  /* default in/out */
  --ease-standard: cubic-bezier(0.2, 0, 0, 1); /* @kind other */
  /* entrances */
  --ease-out:      cubic-bezier(0.16, 1, 0.3, 1); /* @kind other */
  /* exits */
  --ease-in:       cubic-bezier(0.5, 0, 0.75, 0); /* @kind other */

  --dur-instant: 90ms;   /* @kind other */
  --dur-fast:    160ms;  /* @kind other */
  --dur-base:    240ms;  /* @kind other */
  --dur-slow:    400ms;  /* @kind other */
  --dur-slower:  680ms;  /* @kind other */

  /* ---- z-index ------------------------------------------ */
  --z-base: 1;        /* @kind other */
  --z-sticky: 100;    /* @kind other */
  --z-overlay: 800;   /* @kind other */
  --z-modal: 900;     /* @kind other */
  --z-toast: 1000;    /* @kind other */
}