style.css

body, html {
    height:100%;
    width:100%;
    min-height:100%;
    padding:0;
    margin:0;
}
.error {
    width:200px;
    height:20px;
    height:auto;
    position:absolute;
    left:50%;
    margin-left:-100px;
    bottom:10px;
    background-color: #383838;
    color: #F0F0F0;
    font-family: Calibri;
    font-size: 20px;
    padding:10px;
    text-align:center;
    border-radius: 2px;
    -webkit-box-shadow: 0px 0px 24px -1px rgba(56, 56, 56, 1);
    -moz-box-shadow: 0px 0px 24px -1px rgba(56, 56, 56, 1);
    box-shadow: 0px 0px 24px -1px rgba(56, 56, 56, 1);
}

.container {
    width: 100%;
    margin: 0px auto;
    text-align: center;
    margin-top: 100px;
}

.btn{
    border-color: #ddd;
    border-bottom-color: #cecece;
    background: #f4f4f4;
    background-repeat: repeat-x;
    text-shadow: none;
    outline: 0!important;
    display: inline-block;
    margin-bottom: 0;
    font-weight: 400;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    background-image: none;
    border: 1px solid transparent;
    white-space: nowrap;
    padding: 6px 12px;
    font-size: 13px;
    line-height: 1.42857143;
    border-radius: 2px;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
} 
.btn-primary{
    color: #fff;
    background-color: #428bca;
    border-color: #357ebd;
}