body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  width: 180px; /* 给 popup 一个合适的宽度 */
  padding: 0 15px;
  color: #333;
}

#app {
  padding: 10px 0;
}

h1 {
  font-size: 18px;
  text-align: center;
  margin-bottom: 20px;
}

.setting-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
}

/* 开关的样式 */
.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.switch input { 
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ccc;
  transition: .4s;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: .4s;
}

input:checked + .slider {
  background-color: #007bff;
}

input:checked + .slider:before {
  transform: translateX(20px);
}

.slider.round {
  border-radius: 34px;
}

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