Responsive Circle

Responsive Circle

<div class="circle">
  <div class="content">
    <span>Centered text</span>
  </div>
</div>

<style>
html {
  font: 300 100%/1.5 Ubuntu;
  color: #333;
}

.circle {
  position: relative;
  width: 100%;
  height: 0;
  padding: 50% 0;
  margin: 1em auto;
  border-radius: 50%;
  -webkit-border-radius: 50%;
  -moz-border-radius: 50%;
  border-radius: 50%;
}

.content {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  text-align: center;
}
.content:before {
  content: '';
  vertical-align: middle;
  display: inline-block;
  width: 0;
  height: 100%;
}

.content span {
  vertical-align: middle;
  display: inline-block;
}
</style>