body {
  overflow: hidden;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  font-size: 1rem;
}
.control {
  padding-bottom: 0.5rem;
}
.preview canvas {
  border: 1px solid black;
}

.control.file input[type="file"] {
  display: none;
}
.control.file label {
  border-radius: 4px;
  border: 1px solid black;
  -display: block;
  padding: 0.25rem;
  text-align: center;
}

.control.button button {
  border-radius: 4px;
  border: 1px solid black;
  display: block;
  padding: 0.25rem;
  font-size: 1rem;
}

@media (min-aspect-ratio: 1/1) {
  /* Horizontal */
  .preview canvas {
    position: absolute;
    height: 100%;
    top: 0;
    right: 0;
  }

  .row {
    display: block;
  }
  .col50 {
    width: 50%;
  }
}

@media (max-aspect-ratio: 1/1) {
  /* Vertical */
  .preview canvas {
    position: absolute;
    width: 100%;
    bottom: 0;
    left: 0;
  }
  .control.file label {
    width: 90%;
  }
  .control.button button {
    width: 90%;
  }

  .row {
    width: 100%;
    display: flex;
  }
  .col50 {
    width: 50%;
  }
}