freeCodeCamp/client/src/components/settings/scrollbar-width.css

label[for='scrollbar-width-slider'] {
  margin-bottom: 1rem;
}

input.scrollbar-width[type='range'] {
  -webkit-appearance: none;
  appearance: none;
  border: 0;
  background: transparent;
  position: relative;
  height: calc(1rem + 6px);
  width: 100%;
}

input.scrollbar-width[type='range']::-webkit-slider-runnable-track {
  width: 100%;
  height: 5px;
  background: var(--secondary-color);
}

input.scrollbar-width[type='range']::-webkit-slider-thumb {
  /* box-shadow is needed to allow left hand side of slider track to have 
     same color as right side. */
  box-shadow: 1px 1px 1px #3d3d3d;
  background: var(--secondary-color);
  -webkit-appearance: none;
  width: calc(1rem + 6px);
  height: calc(1rem + 6px);
  margin-top: -0.5rem;
}

input.scrollbar-width[type='range']:focus-visible::-webkit-slider-thumb {
  outline: 3px solid var(--focus-outline-color);
  outline-offset: -3px;
}

input.scrollbar-width[type='range']::-moz-range-track {
  width: 100%;
  height: 5px;
  background: var(--secondary-color);
}

input.scrollbar-width[type='range']::-moz-range-progress {
  background: var(--secondary-color);
  height: 5px;
}

input.scrollbar-width[type='range']::-moz-range-thumb {
  box-shadow: 1px 1px 1px #3d3d3d;
  border: 3px solid var(--secondary-color);
  height: 1rem;
  width: 1rem;
  background: var(--secondary-color);
  position: relative;
  z-index: 400;
}

input.scrollbar-width[type='range']:focus-visible::-moz-range-thumb {
  outline: 3px solid var(--focus-outline-color);
  outline-offset: -3px;
}

.scrollbar-width-numbers {
  display: flex;
  width: 100%;
  justify-content: space-between;
}

.scrollbar-width-numbers span:nth-child(1) {
  position: relative;
  inset-inline-start: 0.375rem;
}

.scrollbar-width-numbers span:nth-child(2) {
  position: relative;
  inset-inline-start: 0.5rem;
}

.scrollbar-width-numbers span:nth-child(3) {
  position: relative;
  inset-inline-start: 0.325rem;
}

.scrollbar-width-numbers span:nth-child(4) {
  position: relative;
  inset-inline-start: 0.15rem;
}

.scrollbar-width-numbers span:nth-child(5) {
  position: relative;
  inset-inline-start: -0.05rem;
}

.scrollbar-width-numbers .selected {
  font-weight: 900;
  background-color: transparent;
}

.scrollbar-width-container .scrollbar-width-ticks {
  position: relative;
  display: flex;
}

.scrollbar-width-container .tick {
  height: 1rem;
  width: 1rem;
  border: 2px solid var(--secondary-color);
  background: var(--secondary-background);
  position: absolute;
  z-index: 100;
  top: 3px;
  display: block;
}

.scrollbar-width-container .tick[data-current='true'] {
  z-index: -1;
}

.scrollbar-width-ticks .tick:nth-child(1),
[dir='rtl'] .scrollbar-width-ticks .tick:nth-child(5) {
  left: 3px;
}

.scrollbar-width-ticks .tick:nth-child(2),
[dir='rtl'] .scrollbar-width-ticks .tick:nth-child(4) {
  left: calc(25% - 0.25rem + 2px);
}

.scrollbar-width-ticks .tick:nth-child(3) {
  left: calc(50% - 0.5rem + 0.5px);
}

.scrollbar-width-ticks .tick:nth-child(4),
[dir='rtl'] .scrollbar-width-ticks .tick:nth-child(2) {
  left: calc(75% - 0.5rem - 5px);
}

.scrollbar-width-ticks .tick:nth-child(5),
[dir='rtl'] .scrollbar-width-ticks .tick:nth-child(1) {
  left: calc(100% - 1rem - 2px);
}

.scrollbar-width-ticks .tick:hover,
.scrollbar-width-numbers span:hover {
  cursor: pointer;
}

.scrollbar-width-preview {
  display: inline-block;
  background: var(--secondary-color);
  height: 1.5rem;
  position: absolute;
  margin: 0 0.5rem;
}