.img-replace {
  /* replace text with an image */
  display: inline-block;
  overflow: hidden;
  text-indent: 100%; 
  color: transparent;
  white-space: nowrap;
}
.bts-popup {
  position: fixed;
  z-index: 3;
  left: 0;
  top: 0;
  height: 100%;
  width: 100%;
  overflow: scroll;
  background-color: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  -webkit-transition: opacity 0.3s 0s, visibility 0s 0.3s;
  -moz-transition: opacity 0.3s 0s, visibility 0s 0.3s;
  transition: opacity 0.3s 0s, visibility 0s 0.3s;
}
.bts-popup.is-visible {
  opacity: 1;
  visibility: visible;
  -webkit-transition: opacity 0.3s 0s, visibility 0s 0s;
  -moz-transition: opacity 0.3s 0s, visibility 0s 0s;
  transition: opacity 0.3s 0s, visibility 0s 0s;
}

.bts-popup-container {
	position: relative;
	width: 50%;
	max-width: 500px;
	margin: 4em auto;
	background: #f9f1e5;
	border-radius: none;
	text-align: center;
	box-shadow: 10px 10px 5px black;
	-webkit-transform: translateY(-40px);
	-moz-transform: translateY(-40px);
	-ms-transform: translateY(-40px);
	-o-transform: translateY(-40px);
	transform: translateY(-40px);
	/* Force Hardware Acceleration in WebKit */
	-webkit-backface-visibility: hidden;
	-webkit-transition-property: -webkit-transform;
	-moz-transition-property: -moz-transform;
	transition-property: transform;
	-webkit-transition-duration: 0.3s;
	-moz-transition-duration: 0.3s;
	transition-duration: 0.3s;
}
.bts-popup-container img {
  padding: 20px 0 0 0;
}

.bts-popup-container .bts-popup-button {
  padding: 5px 25px;
  border: 2px solid black;
	display: inline-block;
  margin-bottom: 10px;
}

.bts-popup-container .bts-popup-close {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 30px;
  height: 30px;
}
.bts-popup-container .bts-popup-close::before, .bts-popup-container .bts-popup-close::after {
  content: '';
  position: absolute;
  top: 12px;
  width: 16px;
  height: 3px;
  background-color: black;
}
.bts-popup-container .bts-popup-close::before {
  -webkit-transform: rotate(45deg);
  -moz-transform: rotate(45deg);
  -ms-transform: rotate(45deg);
  -o-transform: rotate(45deg);
  transform: rotate(45deg);
  left: 8px;
}
.bts-popup-container .bts-popup-close::after {
  -webkit-transform: rotate(-45deg);
  -moz-transform: rotate(-45deg);
  -ms-transform: rotate(-45deg);
  -o-transform: rotate(-45deg);
  transform: rotate(-45deg);
  right: 6px;
  top: 13px;
}
.is-visible .bts-popup-container {
  -webkit-transform: translateY(0);
  -moz-transform: translateY(0);
  -ms-transform: translateY(0);
  -o-transform: translateY(0);
  transform: translateY(0);
}