html,
body {
    height: 100%;
    background-image: linear-gradient(to top,#072146,#054c89);
    background-attachment: fixed;
}

body {
    display: -ms-flexbox;
    display: flex;
    -ms-flex-align: center;
    align-items: center;
    padding-top: 40px;
    padding-bottom: 40px;
    background-color: #f5f5f5;
}
.logo-top {
    width: 100%;
    height: 100px;
}
.img-logo-top {
    width: 100%;
    position: absolute;
    bottom: -150%;
    left: 0;
    z-index: 0;
    pointer-events: none;
}
.form-signin {
    width: 100%;
    max-width: 357px;
    padding: 15px;
    margin: auto;
}
.form-signin .form-control:focus {
    z-index: 2;
}