.ol-ext-popup-input {
  display: inline-block;
  vertical-align: top;
}
.ol-ext-popup-input.ol-popup {
  position: relative;
  width: 2em;
  height: 1.5em;
  display: inline-block;
  border: 3px solid #fff;
  border-right-width: 1em;
  box-shadow: 0 0 2px 1px #666;
  border-radius: 2px;
  box-sizing: content-box;
  user-select: none;
  vertical-align: middle;
}
.ol-ext-popup-input.ol-popup:after {
  content: "";
  position: absolute;
  border: .5em solid #aaa;
  border-width: .5em .3em 0;
  border-color: #999 transparent;
  right: -.8em;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
}

.ol-ext-popup-input * {
  box-sizing: content-box;
}

.ol-ext-popup-input.ol-popup .ol-popup {
  position: absolute;
  top: 100%;
  min-width: 3em;
  min-height: 3em;
  left: 0;
  box-shadow: 1px 1px 3px 1px #999;
  display: block;
  background-color: #fff;
  display: none;
  z-index: 1;
}
.ol-ext-popup-input.ol-popup .ol-popup.ol-visible {
  display: block;
}

.ol-ext-popup-input.ol-popup-fixed .ol-popup {
  position: fixed;
  top: auto;
  left: auto;
}