.m-popup-box {
  position: relative;

  display: block;
  margin-top: 10px;
  padding: 15px;

  text-align: left;

  background-color: #FFFFFF;
  border: 2px solid #E6E6E6;
}

.m-popup-box:before {
  position: absolute;
  top: -12px;
  left: 50%;
  z-index: 89;

  display: block;
  margin-left: -6px;
  height: 0;
  width: 0;
  content: "";

  border: inset 6px;
  border-color: transparent transparent #FFFFFF transparent;
  border-bottom-style: solid;
}
.m-popup-box:after {
  position: absolute;
  top: -18px;
  left: 50%;
  z-index: 88;

  display: block;
  height: 0;
  width: 0;
  margin-left: -9px;
  content: "";

  border: inset 9px;
  border-color: transparent transparent #E6E6E6 transparent;
  border-bottom-style: solid;
}

.m-popup-box__header {
  padding-bottom: 15px;
}

.m-popup-box__content {
  margin-top: 15px;
  text-align: right;
}