#overlay-modal {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background-color: #fff;
  width: 640px;
  height: 512px;
  text-align: center;
  overflow: hidden;
  z-index: 10001;
  border: 2px #999 solid;
  margin: auto;
  font-size: 10px;
}
#overlay-control {
  margin: 8px 0;
  font-size: 14px;
}
#overlay-close {
  position: absolute;
  z-index: 3001;
  top: -4px;
  right: -3px;
  background-color: #fff;
  padding: 0.5em;
  border: 1px #000 solid;
  font-weight: bold;
  font-size: 16px;
  color: #000;
  line-height: 1;
  cursor: pointer;
}
#overlay-close:hover {
  color: red;
}
#overlay-counter {
  font-weight: 700;
}
#overlay-mask {
  height: 100%;
  width: 100%;
  position: absolute;
  z-index: 10000;
  top: 0;
  left: 0;
  background-color: #fff;
  filter: alpha(opacity=86);
  opacity: .86;
  -moz-opacity: .86;
}

@media (max-width: 650px) {
  #overlay-modal, #overlay-mask {
    display: none !important;
  }
}