.sing-background{
    /*background: url('../images/sing.jpg') repeat;*/
    z-index:999;
    width:100%;
    height:100%;
    margin: auto;
}

.form-signin {
    max-width: 330px;
    padding: 15px;
    margin: 20px auto;
    border-radius: 20px; 
    background: rgba(255,255,255,0.9);
}
.form-signin .form-signin-heading,
.form-signin .checkbox {
    margin-bottom: 10px;
}
.form-signin .checkbox {
    font-weight: normal;
}
.form-signin .form-control {
    position: relative;
    height: auto;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    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: 0px;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}