html {
    height: 100%;
}

body {
    display: flex;
    height: 100%;
}

div.index-container {
    margin: auto;
}

.form-signin {
    width: 100%;
    padding: 15px;
}

.form-signin .checkbox {
    font-weight: 400;
}

.form-signin .form-control {
    position: relative;
    box-sizing: border-box;
    height: auto;
    padding: 10px;
    font-size: 16px;
}

.form-signin input[type="text"] {
    margin-bottom: -1px;
    border-bottom-right-radius: 0;
    border-bottom-left-radius: 0;
}

.form-signin input[type="password"] {
    margin-bottom: 10px;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}
.form-signin input[type="checkbox"] {
    margin-right: 5px;
    vertical-align: middle;
}