/* ============================================================
   Opto Alignment — Effects: radii, borders, shadows, motion
   Restrained, precise, instrument-grade. Low radii, crisp
   borders, soft cool shadows. No flashy glows.
   ============================================================ */

:root {
  /* ---- Corner radius (tight — this is precision hardware) ---- */
  --radius-xs: 2px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --radius-xl: 16px;
  --radius-pill: 999px;

  /* ---- Border widths ---- */
  --border-hairline: 1px; /* @kind other */
  --border-thick: 2px;    /* @kind other */

  /* ---- Shadows (cool-tinted, subtle) ---- */
  --shadow-xs: 0 1px 2px rgba(13, 27, 61, 0.06);
  --shadow-sm: 0 1px 3px rgba(13, 27, 61, 0.08), 0 1px 2px rgba(13, 27, 61, 0.04);
  --shadow-md: 0 4px 12px rgba(13, 27, 61, 0.08), 0 2px 4px rgba(13, 27, 61, 0.05);
  --shadow-lg: 0 12px 28px rgba(13, 27, 61, 0.12), 0 4px 8px rgba(13, 27, 61, 0.06);
  --shadow-xl: 0 24px 48px rgba(13, 27, 61, 0.16);

  /* ---- Motion ---- */
  --ease-standard: cubic-bezier(0.2, 0, 0.2, 1);  /* @kind other */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);      /* @kind other */
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);  /* @kind other */
  --dur-fast: 120ms;  /* @kind other */
  --dur-base: 180ms;  /* @kind other */
  --dur-slow: 280ms;  /* @kind other */
}