html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}
body {
  display: flex;
  flex-direction: column;
  width: 100%;
}
body main {
  align-items: center;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
body main .container {
  height: 100%;
  width: 100%;
}
body main .container .canvas-container {
  margin: 0 auto;
}
body footer {
  text-align: center;
}