html, body {
    height: 100%;
}

.jumbotron {
    background-color: white;
}

.panel {
    background-color: white;
    border-color: #337ab7;
}

.vertical-center {
    height: 100%;
    width: 100%;
    text-align: center;
    margin: 0px 0px 0px 0px;
}
    .vertical-center:before {
        content: " ";
        display: inline-block;
        vertical-align: middle;
        height: 100%;
    }

    .vertical-center > .container {
        max-width: 100%;
        display: inline-block;
        vertical-align: middle;
    }

.visible {
    visibility: visible;
}

.invisible {
    visibility: hidden;
}

.form-control + .fa {
    left: 0;
    padding-left: 0px;
    padding-top: 10px;
}

.form-control:focus + .fa {
    color: #66afe9;
}

.has-left-icon {    
    padding-left: 30px !important;
    padding-right: 10px !important;
}