/* ============================================================
   MWG Design & Research — Effects: radius, border, shadow.
   The brand is almost shadowless. Surfaces are separated by
   1px hairlines, not elevation. The only shadows in the system
   are a soft tooltip drop and tiny control nubs. Corners are
   gently rounded (6–8px on controls, full pills on toggles).
   ============================================================ */
:root {
  /* --- Radius --- */
  --radius-xs:   3px;   /* slider handle, tiny nubs */
  --radius-sm:   6px;   /* select, option chips */
  --radius-md:   8px;   /* buttons, segmented wells, cards */
  --radius-lg:   12px;
  --radius-pill: 999px; /* toggles, badges */

  /* --- Border --- */
  --border-hairline: 1px solid var(--border-default);
  --border-control-1: 1px solid var(--border-control);
  --border-width: 1px; /* @kind other */

  /* The signature: a 2px red rule under the wordmark. */
  --rule-accent: 2px solid var(--accent);

  /* Dashed lane line used in data plots. */
  --rule-lane: 1px dashed #e6e9ef;

  /* --- Shadow (used sparingly) --- */
  --shadow-none: none;
  --shadow-nub:  0 1px 3px rgba(0, 0, 0, 0.2);              /* toggle knob */
  --shadow-handle: 0 1px 4px rgba(209, 31, 58, 0.45);       /* red slider handle */
  --shadow-tooltip: 0 6px 20px rgba(15, 23, 42, 0.18);      /* dark tooltip */
  --shadow-pop: 0 8px 28px rgba(15, 23, 42, 0.12);          /* menus / dialogs */

  /* --- Motion --- */
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1); /* @kind other */
  --dur-fast: 0.12s; /* @kind other */
  --dur-base: 0.15s; /* @kind other */
}