.viewer {
    width: 100%;
    height: 98%;
    overflow: auto;
}
html {
  height: 100%;
}

body {
  height: 100%;
  display: flex;
}

#rotation-slider {
    height: 200px;
    width: 20px;
    -webkit-appearance: slider-vertical;
}

.no-select {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    cursor: move;
    cursor: -moz-grab;
    cursor: -webkit-grab;
}

.no-select:active {
    cursor: move;
    cursor: -moz-grabbing;
    cursor: -webkit-grabbing;
}