Bloc CSS tutor assesment

index.css

body {
  margin: 0;
}

.clearfix:after {
  content: "";
  display: table;
  clear: both;
}

header {
  width: 100%;
  height: 60px;
  background-color: #333;
}

.pricing {
  padding: 20px;
  background-color: tomato;
}

.pricing-tiers {
  width: 960px;
  margin: 0px auto;
  background-color: #ddd;
}

.pricing-tiers .tier {
  width: 260px;
  margin: 20px;
  padding: 10px;
  background-color: white;
  float: left;
}

.tier h1 {
  font-family: "Helvetica", sans-serif;
  font-weight: bold;
  font-size: 2em;
  margin-bottom: 20px;
  text-align: center;
}

.pricing-tiers > .tier:last-child {
  margin-right: 0px;
}