Interactive demo

Specificity and cascade visualizer

Compare selectors and see why source order, layers, and specificity should be treated as separate levers.

Expected behavior

Typing a selector updates a simple specificity score and gives a practical override hint.

Accessibility notes

The score is rendered through an output element and updates in a polite live region.

CSS used in this demo

.tool {
  display: grid;
  gap: 1rem;
  max-width: 44rem;
  margin: 0 auto;
  padding: 1.5rem;
}

.tool h1 {
  margin: 0;
  font-size: 2rem;
}

label {
  display: grid;
  gap: 0.35rem;
  font-weight: 700;
}

input {
  min-height: 3rem;
  border: 2px solid #171717;
  border-radius: 6px;
  padding-inline: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
}

.score {
  display: inline-grid;
  width: fit-content;
  min-width: 9rem;
  place-items: center;
  border: 2px solid #171717;
  border-radius: 8px;
  background: #f8e8e2;
  padding: 0.75rem 1rem;
  font-size: 2rem;
  font-weight: 800;
}