html,
body,
#app {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
}
body {
  margin: 0 1rem;
  background-color: #24292e;
  font-family: 'Helvetica Neue', Helvetica, Arial, 'Hiragino Sans GB', STHeiti,
    'Microsoft YaHei', 'Wenquanyi Micro Hei', sans-serif;
}
#app {
  display: flex;
  flex-flow: column;
  justify-content: center;
  align-items: center;
}
button,
.Button {
  -webkit-appearance: none;
  cursor: pointer;
  display: inline-block;
  line-height: 1;
  margin: 0;
  position: relative;
  font: inherit;
  text-align: center;
  white-space: normal;
  outline: 0;
  user-select: none;
  text-decoration: none;

  padding: 0.9em 1.25em;
  color: #9f7be1;
  background: transparent;
  border: 1px solid rgba(159, 123, 225, 0.8);
  border-radius: 0.3em;
}
.Controls {
  margin: 1rem 0;
  text-align: center;
}
.Controls > * + * {
  margin-top: 1rem;
}
.Controls__colors,
.Controls__export {
  display: none;
}
.Controls--active .Controls__colors {
  display: block;
}
.Controls--active .Controls__export {
  display: inline-block;
}
.Controls__upload {
  position: relative;
  display: inline-block;
  vertical-align: top;
}
.Controls__upload input[type='file'] {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  opacity: 0;
}
.Controls__upload button {
  pointer-events: none;
}