.popup-header {width:100%; padding:20px 0 20px 20px; border-bottom:1px solid #ddd; display:inline-block;}
.popup-header h3 {font-size:1.6em; margin:0 0 0 0; padding:0 0 0 0;}
.popup-header h3 span {display:block;}
.back-btn {position: absolute; z-index:99; top:22px; right:20px;}

.modal-box {
  display: none;
  position: fixed;
  z-index:9999999;
  width: 98%;
  background: white;
  border-bottom: 1px solid #aaa;
  border-radius: 4px;
  box-shadow: 0 3px 9px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(0, 0, 0, 0.1);
  background-clip: padding-box;
}

.modal-box .modal-body { padding: 2em 1.5em; }

.modal-overlay {
  opacity: 0;
  filter: alpha(opacity=0);
  position:fixed;
  top: 0;
  left: 0;
  z-index: 900;
  width: 100%;
  height:100vh;
  background:rgba(0, 0, 0, 0.9) !important;
}

a.close {
  line-height: 1;
  font-size: 2em;
  position: absolute;
  z-index:99;
  top:16px;
  right:20px;
  text-decoration: none;
  opacity:1;
  text-shadow:none;
  color:#222;
}

a.close:hover {
  color: #222;
  opacity:1;
  text-shadow:none;
}

@media (min-width: 1440px) {
  .modal-box { width:25%;}
}

@media (max-width: 1439px) {
  .modal-box { width:40%;}
}

@media (max-width: 1090px) {
  .modal-box { width:50%;}
}

@media (max-width: 871px) {
  .modal-box { width:60%;}
}