:root{
  /* Light UI: soft neutral shadows; dark theme overrides these in theme-dark.css. */
  --shadow-none:none;
  --shadow-sm:0 1px 2px rgba(15,17,21,.06);
  --shadow-md:0 6px 20px rgba(15,17,21,.10);
  --shadow-lg:0 18px 50px rgba(15,17,21,.14);
  --shadow-overlay:0 32px 90px rgba(15,17,21,.22);
  --inset-hairline:inset 0 1px 0 rgba(255,255,255,.6);
  --glow-accent:0 0 0 1px rgba(177,19,19,.55),0 0 28px rgba(177,19,19,.22);
  --glow-accent-soft:0 0 24px rgba(177,19,19,.14);
  --ring-focus:0 0 0 2px var(--surface-canvas),0 0 0 4px var(--focus-ring);
  --scrim-top:linear-gradient(180deg,rgba(15,17,21,.72),rgba(15,17,21,0)); /* @kind other */
  --scrim-bottom:linear-gradient(0deg,rgba(15,17,21,.78),rgba(15,17,21,0)); /* @kind other */
}