html {
background-color:black;
}

body {

  font: 14px/20px Helvetica, Arial, sans-serif;
  margin: 50px auto 0;
  max-width: 400px;
  text-align: center;
  -webkit-font-smoothing: antialiased;
  }
 
  p {
  text-align: center;
  margin: 0 auto;
  }

a {
	color: silver; 
	text-decoration: underline;
}
  
a:hover
{ 
	color :red ;
	text-decoration: underline;
}
  
.callbacks_container {
  margin-top: 10px;
  margin-bottom: 30px;
  position: relative;
  float: left;
  width: 100%;
  }

.callbacks .caption {
  display: block;
  position: relative;
  margin-top: 515px;
  line-height:40px;
  font-size: 13px;
  color: silver;
  max-width: none;
  }

.callbacks_nav {
  position: absolute;
  -webkit-tap-highlight-color: rgba(0,0,0,0);
  top: 52%;
  left: 0;
  opacity: 0.4;
  z-index: 3;
  text-indent: -9999px;
  overflow: hidden;
  text-decoration: none;
  height: 61px;
  width: 38px;
  background: transparent url("../vignettes/themes.gif") no-repeat left top;
  margin-top: -45px;
  }

.callbacks_nav.next {
  left: auto;
  background-position: right top;
  right: 0;
  }


@media screen and (max-width: 600px) {
  h1 {
    font: 24px/50px "Helvetica Neue", Helvetica, Arial, sans-serif;
    }
  .callbacks_nav {
    top: 47%;
    }
  }