body
{
  background-color: aquamarine;
}

table
{
  margin: 24px auto 40px;
}

td
{
  padding: 8px;
}

table, td
{
  border: solid 1px;
  background-color: white;
}

#paint
{
  margin-bottom: 64px;
}

#paint > div
{
  margin: 24px auto;
}

h1, .illust
{
  text-align: center;
}

.radio
{
  /* width: 704px; */
  /* display:        inline-block; */
  align-items:    flex-start;
  vertical-align: middle;
  line-height:    1.5em;
  margin:         auto;
}

.button-area, .canvas-area
{
  text-align: center;
}

.canvas-area
{
  width: 480px;
  max-width: 100%;
  position: relative;
  padding: 0;
  box-sizing: content-box;
}

.canvas-area:before
{
  content: "";
  display: block;
  padding-top: 100%;
}

.canvas-area > canvas
{
  position: absolute;
  left: 0;
  top: 0;
  border: 1px solid;
  max-width: 100%;
  box-sizing: content-box;
  padding: 0;
  margin: 0;
}