html,
body {
  margin: 0;
  padding: 0;
}

@font-face {
  font-family: Wingdings;
  src: url(/examples/static/font/wingding.ttf) format('truetype');
}

@font-face {
  font-family: Symbol;
  src: url(/examples/static/font/symbol.ttf) format('truetype');
}

/** 参考 bulma 的命名 */
.columns {
  display: flex;
}

.column {
  display: block;
  flex-basis: 0;
  flex-grow: 1;
  flex-shrink: 1;
}

.file-list {
  flex: none;
  width: 100px;
  padding-top: 4px;
  padding-left: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.file {
  cursor: pointer;
}

.file:hover {
  color: hsl(217, 71%, 53%);
}

/* The switch - the box around the slider */
.switch {
  position: relative;
  display: inline-block;
  width: 30px;
  height: 18px;
}

/* Hide default HTML checkbox */
.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

/* The slider */
.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  -webkit-transition: 0.4s;
  transition: 0.4s;
}

.slider:before {
  position: absolute;
  content: '';
  height: 16px;
  width: 16px;
  left: 1px;
  bottom: 1px;
  background-color: white;
  -webkit-transition: 0.4s;
  transition: 0.4s;
}

input:checked + .slider {
  background-color: #2196f3;
}

input:focus + .slider {
  box-shadow: 0 0 1px #2196f3;
}

input:checked + .slider:before {
  -webkit-transform: translateX(12px);
  transform: translateX(12px);
}

/* Rounded sliders */
.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}