* {
  padding: 0;
  margin: 0;
}
body {
  background-color: #2b2b2b;
}
.javascript-exercise {
  position: relative;
  width: 500px;
  /*top: 20%;*/
  left: 50%;
  margin-left: -250px;
}
/*.javascript-exercise *{*/
/**/
/*}*/
.commander {
  display: inline-block;
  width: 250px;
  color: #6a8759;
  line-height: 1.5;
  border-bottom: solid 1px #ccc;
}
.result {
  display: inline-block;
  width: 250px;
  color: #6a8759;
  line-height: 1.5;
  border-bottom: solid 1px #ccc;
}
.log {
  text-indent: 2em;
  color: #ffc66d;
  width: 500px;
  line-height: 1.5;
  border-bottom: 1px solid #ccc;
}
.header {
  width: 250px;
  color: #156043;
  background: -webkit-linear-gradient(top, #e6e6e6, #d6d6d6);
  text-indent: 2em;
  border: solid 1px #ccc;
}
.head {
  margin-top: 2%;
  margin-bottom: 1.5%;
  margin-left: 20%;
  /*float: left;*/
}
/*.head:after{*/
/*content: '';*/
/*display: block;*/
/*clear: both;*/
/*}*/
.head div {
  display: inline-block;
  background-color: #999;
  width: 100px;
  height: 40px;
  text-align: center;
  line-height: 40px;
  margin: 5px;
  color: #245269;
  font-size: 1.2em;
}
.primary {
  color: #000066;
}
.error {
  color: #d00301;
}
.result:nth-child(2n) {
  background-color: #3c3f4e;
}
.commander:nth-child(2n+1) {
  background-color: #3c3f4e;
}
.head div:hover {
  box-shadow: 0 5px 8px #111;
}
.head div:active {
  background-color: #666;
}
.row {
  width: 500px;
  border-bottom: 1px solid #cccccc;
}