body {
    padding-top: 40px;
    padding-bottom: 40px;
    background-color: #eee;
}
.form-signin {
    max-width: 370px;
    padding: 15px;
    margin: 0 auto;
}
.form-signin .form-control {
    position: relative;
    box-sizing: border-box;
    height: auto;
    padding: 10px;
    font-size: 16px;
}