* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.app .header {
  display: flex;
  justify-content: space-between;
  position: relative;
  z-index: 99;
}
.app button {
  padding: 5px;
  margin: 5px;
  cursor: pointer;
}
.load-controls .btn-group {
  display: inline-block;
}
.load-controls label {
  cursor: pointer;
}
.load-controls label.disabled,
.app button.disabled {
  pointer-events: none;
}
.app .resizeBox {
  width: 50vw;
  display: inline-block;
  position: absolute;
  left: 0;
  right: 0;
  resize: both;
  overflow: hidden;
  border: 3px solid transparent;
  transition: border .2s;
}
.app .resizeBox.hide {
  display: none;
}
.app .resizeBox.active {
  border: 5px solid red;
  z-index: 10;
}
.app .resizeBox_img {
  width: 100%;
  height: 100%;
  display: block;
}
.opacity-controls{
    min-width: 170px;
}
.slidecontainer {
  width: 100%; /* Width of the outside container */
  margin: 15px 0 0;
}
.slidecontainer.hide{
    display: none;
}
/* The slider itself */
.slider {
  -webkit-appearance: none; /* Override default CSS styles */
  appearance: none;
  width: 100%; /* Full-width */
  height: 10px; /* Specified height */
  background: #d3d3d3; /* Grey background */
  outline: none; /* Remove outline */
  opacity: 0.7; /* Set transparency (for mouse-over effects on hover) */
  -webkit-transition: 0.2s; /* 0.2 seconds transition on hover */
  transition: opacity 0.2s;
}

/* Mouse-over effects */
.slider:hover {
  opacity: 1; /* Fully shown on mouse-over */
}

/* The slider handle (use -webkit- (Chrome, Opera, Safari, Edge) and -moz- (Firefox) to override default look) */
.slider::-webkit-slider-thumb {
  -webkit-appearance: none; /* Override default look */
  appearance: none;
  width: 25px; /* Set a specific slider handle width */
  height: 25px; /* Slider handle height */
  background: #444; /* Green background */
  cursor: pointer; /* Cursor on hover */
  border-radius: 50%;
}

.slider::-moz-range-thumb {
  width: 25px; /* Set a specific slider handle width */
  height: 25px; /* Slider handle height */
  background: #444; /* Green background */
  cursor: pointer; /* Cursor on hover */
  border-radius: 50%;
}