<div class="container">
  <h2>Background is <b style="color: blue;">blue</b>, because of selector specificity.</h2>
  <div class="second first"></div>

  <h2>Background is <b style="color:red">red</b>, because of selector order.</h2>
  <div class="third fourth"></div>

  <h2>Background is <b style="color: green">green</b>, because of selector importance.</h2>
  <div class="fifth sixth"></div>
</div>
/* Specificity example */
body .first {
  background: blue;
}

.second {
  background: yellow;  
}


/* Rules order example */
.third {
  background: cyan;  
}
.fourth {
  background: red;  
}


/* Rules importance example */
.fifth {
  background: green!important;
}
.sixth {
  background: yellow;  
}


/* Settings that are not important for this example. */

div {
  width: 5rem;
  height: 5rem;
  display: flex;
  flex-direction: row;
}
.container {
  display: flex;
  flex-direction: column;
  flex: 1;
  width: 100%;
  height: 100%;
}
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