html,
body {
    height: 100%;
    position: relative;
}

body {
    display: -ms-flexbox;
    display: flow;
    -ms-flex-align: center;
    align-items: center;
    background-image: url("../images/bg_main.jpg");
    background-size: cover;
    background-attachment:fixed;
}

.form-signin {
    width: 100%;
    max-width: 500px;
    padding: 20px;
    margin: auto;
    background-color: #ffffff;
    position: relative;
    border-radius: 15px;
    box-shadow: 1px 5px 20px #0a0a0a;
}

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

.form-signin .form-control {
    position: relative;
    box-sizing: border-box;
    height: auto;
    padding: 10px;
    font-size: 0.9em;
}
.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;
}