/* MC4-R1: one static optical aura attached to the existing ring anchor.
   132% outer footprint; compact inner aura retains its original 124% frame.
   Two unequal soft lobes leave most of the circumference quiet.
   Transparent centers between lobes avoid a luminous disc or an extra ring.
   Ordinary gradients only: no filter, mask, blend mode or animation. */
.agent-card-shell[data-premium-shell] .agent-color-source::before {
  content: "";
  position: absolute;
  inset: -16%;
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
  background:
    /* Narrow chromatic transition close to the ring's left shoulder. */
    radial-gradient(ellipse 8% 23% at 15% 40%,
      rgba(var(--ambient-icon-color), .19) 0%,
      rgba(var(--ambient-icon-color), .10) 38%,
      rgba(var(--ambient-icon-color), 0) 100%),
    /* Smaller, quieter spectral accumulation at the lower-right shoulder. */
    radial-gradient(ellipse 17% 9% at 70% 83%,
      rgba(var(--ambient-icon-secondary), .15) 0%,
      rgba(var(--ambient-icon-secondary), .065) 42%,
      rgba(var(--ambient-icon-secondary), 0) 100%),
    /* Wider neutral falloff dissolves each lobe into the unchanged glass. */
    radial-gradient(ellipse 18% 33% at 18% 40.6%,
      rgba(222, 244, 255, .11) 0%,
      rgba(222, 244, 255, .048) 45%,
      rgba(222, 244, 255, .012) 76%,
      rgba(222, 244, 255, 0) 100%),
    radial-gradient(ellipse 27% 21% at 68.8% 79%,
      rgba(231, 239, 255, .078) 0%,
      rgba(231, 239, 255, .034) 45%,
      rgba(231, 239, 255, .008) 76%,
      rgba(231, 239, 255, 0) 100%);
  /* 124 / 132: preserve inner-lobe size and position while spreading only diffusion. */
  background-size: 93.939394% 93.939394%, 93.939394% 93.939394%, 100% 100%, 100% 100%;
  background-position: center;
  background-repeat: no-repeat;
}