piskel/css/style.less

body {
  background: -webkit-radial-gradient(circle, #000, #373737);
}
/**
 * Application layout
 */

@toolbar-height: 104px;

.column-wrapper {
  text-align: center;
  font-size: 0;
  position: absolute;
  left: 0;
  top: @toolbar-height;
  right: 0;
  bottom: 0;
}

.left-column {
  display: inline-block;
  vertical-align: top;
  height: 100%;
  margin-right: 7px;
}

.main-column {
  display: inline-block;
  height: 100%;
  position: relative;
}

.drawing-canvas-container {
  font-size: 0;
}

.top-section {
  position: absolute;
  bottom: 100%;
  min-width: 400px;
  margin-bottom: 5px;
}

.right-column {
  display: inline-block;
  vertical-align: top;
  background: blue;
  margin-left: 10px;
}


/**
 * Canvases layout
 */

.canvas {
  position: relative;
  z-index: 1;
}

.canvas-container {
  position: relative;
  display: block;
}

.canvas-container .canvas-background {
  background: url(../img/canvas_background.png) repeat;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
}

.canvas.canvas-overlay {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
}

/** 
 * User messages 
 */
.user-message {
    position: absolute;
    bottom: 0;
    left: 25%;
    background-color: #F9EDBE;
    padding: 4px 12px;
    padding-right: 20px;
    border-top-left-radius: 7px;
    border-top-right-radius: 7px;
    border-right: 0;
    color: #222;
    border: #F0C36D 1px solid;
    font-weight: bold;
    font-size: 13px; 
    z-index: 10000;
}

.user-message .close {
  position: absolute;
  top: 0px;
  right: 5px;
  color: gray;
  font-weight: bold;
  cursor: pointer;
  font-size: 18px;
}

.user-message .close:hover {
  color: black;
}