.zst-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 4px;
  align-items: center;
}
.zst-swatch {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 2px solid #e3e3e3;
  background-size: cover;
  background-position: center;
  cursor: pointer;
  padding: 0;
  transition: border-color .15s, transform .15s;
}
.zst-swatch:hover { transform: scale(1.06); }
.zst-swatch.is-selected { border-color: #111; }
.zst-swatch.is-unavailable {
  position: relative;
  opacity: .45;
  cursor: not-allowed;
}
.zst-swatch.is-unavailable::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: linear-gradient(to top left,
      transparent 46%, #999 47%, #999 53%, transparent 54%);
}
.zst-swatch-label {
  font-size: 13px;
  color: #555;
  margin-left: 4px;
}
.zst-color-select-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  opacity: 0;
  pointer-events: none;
}