piskel/src/css/toolbox-animated-preview.css

/**
 * Animated preview styles.
 */

.preview-container {
  border : 0px Solid black;
  border-radius:5px 0px 0px 5px;
  box-shadow : 0px 0px 2px rgba(0,0,0,0.2);
  font-size: 0;
}

.preview-container .canvas-container {
  overflow : hidden;
}

.preview-container canvas {
  border : 0px Solid transparent;
}

#animated-preview-container {
  background: #333;
  border-radius : 0 0 2px 2px;
  overflow : hidden;
}

#animated-preview-canvas-container {
  height :200px;
  width : 200px;
}

.tiled-frame-container {
  height: 100%;
  width: 100%;
  position: relative;
  background-repeat : repeat;
}

.display-fps {
  float: left;
  color: #aaa;
  font-size: 12px;
  min-width: 55px;
  vertical-align: bottom;
  line-height: 26px;
}

.range-fps {
  overflow: hidden;
  width: 100px;
  height : 26px;
  margin : 0;
  box-sizing: border-box;
  padding:0;
}

.preview-toggle-onion-skin {
  font-size: 2rem;
  color: #aaa;
  float: left;
  line-height: 26px;
  height: 100%;
  padding-left: 5px;
  padding-right: 5px;
  border-right: 1px solid #222;
  transition: 0.2s linear;
  cursor:pointer;
}

.preview-toggle-onion-skin:hover {
  color : white;
}

.preview-toggle-onion-skin-enabled,
.preview-toggle-onion-skin-enabled:hover {
  color : gold;
}