.close_b {
    border: solid 1px #89c782;
    background: #f6fff8;
    border-radius: 100px;
    width: 25px;
    height: 25px;
    position: absolute;
    top: 10px;
    right: 10px;
    box-shadow: 0.2px 0.2px 1px 1px #9ed498,
              0.2px -0.2px 1px 1px #9ed498,
              -0.2px 0.2px 1px 1px #9ed498,
              -0.2px -0.2px 1px 1px #9ed498;
    float: right;
    z-index: 4;
    overflow: none;
}

.close_b:hover {
  cursor: pointer;
  color: YellowGreen;
  box-shadow: 0 0 10px DarkSeaGreen;
  outline: none;
}

.close_img {
    background-color: #89c782;
    width: 15px;
    height: 15px;
    position: relative;
    top: 5px;
    left: 5px;
    overflow: none;
    clip-path: polygon(15% 0%, 0% 15%, 35% 50%, 0% 85%, 15% 100%, 50% 65%, 85% 100%, 100% 85%, 65% 50%, 100% 15%, 85% 0%, 50% 35%);
}