.slider{
    background: url("images/logo2.jpg");
    width: 140vh;
    height: 100vh;
    background-size: cover;
    background-position: center;
}
.border{
    border: 1px #000 solid;
    text-align: center;
    height: 50px;
}
.transparente{
    opacity: 0.8;
    -moz-opacity: 0.8;
    filter: alpha(opacity=80);
    -khtml-opacity: 0.8;
    }