/* ============================================================
   DOMAIN · EFFECTS — radii, borders, shadows, motion, z-index
   Calm, low-contrast elevation. Shadows are soft & cool-tinted.
   ============================================================ */
:root {
  /* Radii */
  --radius-xs:   3px;
  --radius-sm:   5px;
  --radius-md:   7px;
  --radius-lg:   10px;
  --radius-xl:   14px;
  --radius-2xl:  20px;
  --radius-pill: 999px;
  --radius-round: 50%;

  /* Border widths */
  --border-width: 1px;
  --border-width-strong: 1.5px;

  /* Shadows — soft, cool, layered. Restrained for a calm tool. */
  --shadow-xs:  0 1px 2px rgba(20, 30, 48, 0.06);
  --shadow-sm:  0 1px 2px rgba(20, 30, 48, 0.06), 0 2px 6px rgba(20, 30, 48, 0.05);
  --shadow-md:  0 2px 4px rgba(20, 30, 48, 0.06), 0 6px 16px rgba(20, 30, 48, 0.08);
  --shadow-lg:  0 4px 8px rgba(20, 30, 48, 0.07), 0 16px 32px rgba(20, 30, 48, 0.11);
  --shadow-xl:  0 8px 16px rgba(20, 30, 48, 0.10), 0 28px 56px rgba(20, 30, 48, 0.16);
  --shadow-focus: 0 0 0 3px rgba(63, 102, 240, 0.28);
  --shadow-inset: inset 0 1px 2px rgba(20, 30, 48, 0.06);

  /* Motion — quick, precise, no bounce. Calm confidence. */
  --ease-standard: cubic-bezier(0.2, 0, 0.1, 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 */
  --ease-spring:   cubic-bezier(0.34, 1.4, 0.5, 1); /* @kind other */
  --duration-fast:   120ms; /* @kind other */
  --duration-normal: 180ms; /* @kind other */
  --duration-slow:   260ms; /* @kind other */

  /* Z-index scale */
  --z-base:     0;   /* @kind other */
  --z-rail:     10;  /* @kind other */
  --z-chrome:   40;  /* @kind other */
  --z-dropdown: 60;  /* @kind other */
  --z-overlay:  80;  /* @kind other */
  --z-modal:    90;  /* @kind other */
  --z-toast:    100; /* @kind other */
}

[data-theme="dark"] {
  --shadow-xs:  0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-sm:  0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 6px rgba(0, 0, 0, 0.35);
  --shadow-md:  0 2px 4px rgba(0, 0, 0, 0.4), 0 6px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg:  0 4px 8px rgba(0, 0, 0, 0.45), 0 16px 32px rgba(0, 0, 0, 0.55);
  --shadow-xl:  0 8px 16px rgba(0, 0, 0, 0.5), 0 28px 56px rgba(0, 0, 0, 0.65);
  --shadow-focus: 0 0 0 3px rgba(106, 140, 255, 0.4);
  --shadow-inset: inset 0 1px 2px rgba(0, 0, 0, 0.4);
}