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A class selector in CSS looks like this:

.class {


The word “class” in that code above can be anything. It refers to the attribute on HTML elements. See the relationship between these two things:

<a href="#" class="big-button">Push Me</a>
.big-button {
   font-size: 60px;

You can limit a class selector to a specific kind of element: {
  list-style: none;

By itself, a class selector has a specificity value of 0, 0, 1, 0. That’s “more powerful” than just an element selector (like: a { }) but less powerful than an ID selector (like #header { }).

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