body {
  margin: 0;
  background: #fff;
  overflow: hidden;
}

/* toolbar */
.toolbar {
  position: fixed;
  top: 0;
  width: 100%;
  background: #222;
  display: flex;
  gap: 5px;
  padding: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.toolbar button {
  padding: 6px 10px;
  border: none;
  border-radius: 6px;
  color: white;
  background: #444;
}

/* colors */
.colors {
  position: fixed;
  top: 60px;
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  justify-content: center;
  background: #eee;
  padding: 5px;
}

.colors button {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: none;
}

/* canvas */
canvas {
  margin-top: 120px;
  display: block;
  background: white;
}

/* gallery */
#gallery {
  position: fixed;
  bottom: 0;
  width: 100%;
  background: #fff;
  max-height: 150px;
  overflow: auto;
}

#gallery img {
  width: 80px;
  margin: 5px;
}