.ui-switch {
  --switch-bg: #A1A1AA;
  --switch-width: 48px;
  --switch-height: 24px;
  --circle-diameter: 28px;
  --circle-bg: #FFFFFF;
  --circle-inset: calc((var(--circle-diameter) - var(--switch-height)) / 2);
}

.ui-switch input {
  display: none;
}

.slider {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: var(--switch-width);
  height: var(--switch-height);
  background: var(--switch-bg);
  border-radius: 999px;
  position: relative;
  cursor: pointer;
  transition: background var(--transition);
}

.slider .circle {
  top: calc(var(--circle-inset) * -1);
  left: 2px;
  width: var(--circle-diameter);
  height: var(--circle-diameter);
  position: absolute;
  background: var(--circle-bg);
  border-radius: 50%;
  transition: left 0.2s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.ui-switch input:checked + .slider {
  background: var(--accent);
}

.ui-switch input:checked + .slider .circle {
  left: calc(100% - var(--circle-diameter) - 2px);
}

.slider:hover .circle {
  transform: scale(1.05);
}

.slider:active .circle {
  transform: scale(0.95);
}