#preloader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #fff; /* change if the mask should have another color then white */
    z-index: 99; /* makes sure it stays on top */
}
#status {
    width: 200px;
    height: 200px;
    position: absolute;
    left: 50%; /* centers the loading animation horizontally one the screen */
    top: 50%; /* centers the loading animation vertically one the screen */
    background-image: url(../img/loader.gif); /* path to your loading animation */
    background-repeat: no-repeat;
    background-position: center;
    margin: -100px 0 0 -100px; /* is width and height divided by two */
}
body {
    padding-top: 4rem;
}
.form-signin {
    width: 100%;
    max-width: 330px;
    padding: 15px;
    margin: auto;
}

.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 .form-control:focus {
    z-index: 2;
}

.form-signin input[type="email"] {
    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;
}