body {
  text-align: center;
  font-family: "Segoe UI", "Lucida Grande", Helvetica, Arial, "Microsoft YaHei", FreeSans, Arimo, "Droid Sans", "wenquanyi micro hei", "Hiragino Sans GB", "Hiragino Sans GB W3", "FontAwesome", sans-serif;
}
.demo-page1{background-color: #6da15b;}
.demo-page2{background-color: #c44c7d;}
.wrapper {
  max-width: 1000px;
  height: 600px;
  background: #fff;
  border-bottom: 5px solid #ddd;
  border-radius: 5px 5px 3px 3px;
  margin: 40px auto 0 auto;
  position: relative;
  color: #6699cc;
}
.text {
  width: 100%;
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
  -moz-transform: translate(-50%, -50%);
}
.browserbar {
  width: 100%;
  height: 30px;
  background: linear-gradient(to bottom, #ddd 0%, #c7c7c7 100%);
  border-radius: 5px 5px 0 0;
  border-bottom: 1px solid #c7c7c7;
  border-top: 1px solid #e4e4e4;
  position: relative;
}
.browserbar:after,
.browserbar:before {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #ebebeb;
  position: absolute;
  top: 50%;
  -webkit-transform: translateY(-50%);
  -moz-transform: translateY(-50%);
  display: block;
}
.browserbar:before {
  left: 15px;
  box-shadow: 15px 0 0 0 #ebebeb;
}
.browserbar:after {
  left: 45px;
}