<label>
  <input type='checkbox'> 
  Click me
</label>

body {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  font-family: Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 3.5rem;
}
input[type="checkbox"]:checked {
  box-shadow: 0 0 0 3px hotpink;
}