amis2/scss/components/_popoverable.scss

.#{$ns}Field-popOverBtn {
  color: $PopOverAble-iconColor;
  margin-left: $gap-xs;
  visibility: hidden;
  display: inline-block;
  cursor: pointer;
  opacity: 0.6;
  vertical-align: middle;

  &:hover {
    color: $PopOverAble-onHover-iconColor;
    opacity: 1;
  }
}

.#{$ns}Field--popOverAble {
  outline: none;
  position: relative;

  &:hover .#{$ns}Field-popOverBtn {
    visibility: visible;
  }
}

.#{$ns}PopOverAble-popover {
  min-width: px2rem(320px);
  max-width: px2rem(640px);

  .#{$ns}Panel {
    margin-bottom: 0;
    border: none;
  }
}