body {
  color: #000;
  cursor: default;
  width: 610px;
  margin: auto;
  padding: 0;
  font-size: 18px;
  font-family: Arial, Verdana, sans-serif;
  font-weight: normal;
  -webkit-user-select: none;
  -moz-user-select: none;
  user-select: none;
}
header {
  height: 100px;
  text-align: center;
  padding-top: 50px;
  background: url(demo.jpg);
}
main {
  margin: 40px 0;
}
main > div {
  float: left;
  width: 50%;
  text-align: center;
  line-height: 280px;
  background: #eee;
  -webkit-transition: all linear .3s;
  -moz-transition: all linear .3s;
  transition: all linear .3s;
}
main > div:hover {
  background: #999;
}
main > .right {
  color: #fff;
  background: #ccc;
}

[role=button] {
  display: inline-block;
  color: #eee;
  font-size: 25px;
  line-height: 50px;
  padding: 0 20px;
  text-align: center;
  cursor: pointer;
  text-shadow: 0 -1px 0 rgba(0, 0, 0, .25);
  background-color: #5bb75b;
  background-image: -moz-linear-gradient(top, #62c462, #51a351);
  background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#62c462), to(#51a351));
  background-image: -webkit-linear-gradient(top, #62c462, #51a351);
  background-image: -o-linear-gradient(top, #62c462, #51a351);
  background-image: linear-gradient(to bottom, #62c462, #51a351);
  background-repeat: repeat-x;
  border: 1px solid;
  border-color: #51a351 #51a351 #387038;
  border-color: rgba(0, 0, 0, .1) rgba(0, 0, 0, .1) rgba(0, 0, 0, .25);
  border-radius: 4px;
  text-decoration: none;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .2), 0 1px 2px rgba(0, 0, 0, .05);
}
[role=button]:hover {
  background: #51a351 0 -15px;
  -webkit-transition: background-position .1s linear;
  -moz-transition: background-position .1s linear;
  transition: background-position .1s linear;
}
