body {
    overflow: hidden;
}

.btn {
    display: inline-block;
    padding: 6px 12px;
    margin-bottom: 0;
    font-size: 14px;
    font-weight: 400;
    line-height: 1.42857143;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    -ms-touch-action: manipulation;
    touch-action: manipulation;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-image: none;
    border: 1px solid transparent;
    border-radius: 4px;
}

.btn-success {
    color: #fff;
    background-color: #5cb85c;
    border-color: #4cae4c;
}

.btn-danger {
    color: #fff;
    background-color: #d9534f;
    border-color: #d43f3a;
}

.btn-danger:hover {
    color: #fff;
    background-color: #c9302c;
    border-color: #ac2925;
}

.btn-success:hover {
    color: #fff;
    background-color: #449d44;
    border-color: #398439;
}

a {
    text-decoration: none
}

body > div {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 100%;
    text-align: center;
    font-family: Roboto;
    font-weight: normal;
    font-size: 18px
}