html{
    background-color: #3c3838;
}

body{
    background-color: transparent;
}

#log-in-form{
    margin: 130px auto 0;
    padding: 10px;
    color: white;
    height: auto;
    max-width: 800px;
    background-image: url("notebook-chill.jpg");
    background-size: cover;
}

#log-in-form .heading{
	text-align: center;
    margin-top: 50px;
    margin-bottom: 70px;
}

#log-in-form .form-group{
    float: left;
    width: 40%;
    margin-left: 40px;
}

#log-in-form .form-control{
    padding: 15px 25px;
    height: auto;
}

#log-in-form .form-group-btn{
    width: 15%;
    margin-left: 70px;
}

#log-in-form .btn{
    padding: 13px 32px;
}

#log-in-form .checkbox{
    float: left;
    margin: 15px 0 50px 40px;
}


@media screen and (max-width: 800px){
    #log-in-form{
        margin: 20px;
    }

    #log-in-form .form-group{
        width: 60%;
        float: none;
        margin: 10px auto;
    }

    #log-in-form .form-group-btn{
        margin-top: 30px;
    }

    #log-in-form .btn{
        width: 100%;
    }

    #log-in-form .checkbox{
        width: 60%;
        float: none;
        margin: 15px auto 50px auto;
    }
}

@media screen and (max-width: 600px){
    #log-in-form .form-group,
    #log-in-form .checkbox{
        width: 90%;
    }
}