body
{
    background: url('../img/Yosemite 4.jpg') fixed;
    background-size: cover;
    padding: 0;
    margin: 0;
}

.centered-form{
    margin-top: 60px;
}

.centered-form .panel{
    background: rgba(255, 255, 255, 0.8);
    box-shadow: rgba(0, 0, 0, 0.3) 20px 20px 20px;
}