brush-preview.css

body {
  background-color: #535353;
  user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  -moz-user-select: none;
}

hr {
  border: 0;
  border-top: solid 1px #383838;
  border-bottom: solid 1px #707070;
}

input[type=range] {
  width: 200px;
  margin-left: 5px;
}

label {
  margin-left: 5px;
}

.indent {
  margin: 10px;
}

#canvas-area > div, #pointer-container > canvas {
  display: inline-block;
  border: solid 1px #383838;
  border-bottom: solid 1px #707070;
}

#circle-brush {
  width: 30px;
  height: 30px;
  display: inline-block;
  border-radius: 15px;
  background-color: #000;
}

.brush-image {
  height: 30px;
  width: auto;
  opacity: 0.5;
  -webkit-filter: invert(100%);
  -moz-filter: invert(100%);
  -ms-filter: invert(100%);
}

.brush-image:hover {
  cursor: pointer;
  opacity: 1;
}

.brush-image.on {
  opacity: 1;
}

p, span {
  margin: 0;
  margin-bottom: 6px;
  color: #fff;
  font-size: 10pt;
  font-family: "Source Sans", helvetica, arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}