style.css

body {
  padding: 20px;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 100vw;
  min-height: 100vh;
  background: #ddd;
  box-sizing: border-box;
}

#myCanvas.default,
.default-canvas,
#myCanvas.black {
  background: white;
}
#myCanvas.white,
#recorte #myCanvas.blue {
  background: black;
}

#recorte #myCanvas.black {
  background: white;
}

* {
  font-family: monospace;
}

#radio {
  display: flex;
  flex-wrap: wrap;
}
#radio > * {
  margin-right: 20px;
}

#canvas-container,
.canvas-container {
  max-width: calc(100vw - 40px);
  overflow: auto;
}

button.emoji {
  font-size: 24px;
  position: relative;
  top: 3px;
  background: transparent;
  border: none;
}

@media screen and (max-width: 992px) {
  button,
  input,
  label {
    font-size: 16px;
  }
  button {
    background: white;
  }

  label {
    margin-bottom: 10px;
  }
}

.other-pages {
  position: fixed;
  bottom: 6px;
  right: 6px;
  display: flex;
}

.other-pages a {
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.01em;
  font-size: 14px;
  display: block;
  margin-right: 13px;
  color: black;
}

.other-pages a:hover:not(.not-a-link) {
  text-decoration: underline;
}

.other-pages a.not-a-link {
  opacity: 0.3;
}