/* CSS Document */
@import url(https://fonts.googleapis.com/css?family=Open+Sans:300,700|Open+Sans+Condensed:700);

#myCalculator { margin: 0; padding: 0; font-size: 16px; font-family: 'Open Sans', sans-serif; font-weight: 300; line-height: 24px; max-width: 800px; }


/* CSS rules go here */


/* CSS Document */
@import url(https://fonts.googleapis.com/css?family=Open+Sans:300,700|Open+Sans+Condensed:700);

#myCalculator {
  margin: 0;
  padding: 0;
  font-size: 16px;
  font-family: 'Open Sans', sans-serif;
  font-weight: 300;
  line-height: 24px;
  max-width: 800px;
}

#myCalculator main {
  background-color: #444;
}

#myCalculator main section {
  width: 25%;
  float: left;
  padding-top: 110px;
  color: #fff;
  background-repeat: no-repeat;
  background-position: center 5px;
  background-size: 63px 100px;
}

#myCalculator main::after {
  content:'';
  display: block;
  clear: both;
}


Add CSS properties for lightbulbs
Add CSS properties for lightbulbs
