body{
    background: url(../images/k2_login.jpg) no-repeat center center fixed;
    background-size:cover;
}
.main-section{
    margin:0 auto ;
    margin-top:25%;
    padding:0 ;
}
.user-img{
    margin-top: -50px;
    margin-bottom: 35px ;
}

.user-img img {
    width: 100px;
    height: 100px;
    box-shadow: 0px 0px 3px #3b4652 ;
}

.modal-content{
    background-color: #3b4652;
    opacity: .85;
    padding: 0 20px ;
    box-shadow: 0px 0px 3px #3b4652 ;
}

.form-group input{
    height:42px;
    font-size: 18px ;
    border:0;
    padding-left: 54px;
    border-radius: 8px;
}

.form-group::before {
    font-family: 'Font Awesome\ 5 Free';
    position: absolute ;
    left: 28px;
    font-size: 22px;
    padding-top: 4px ;

}

.form-group#user-group::before{
    content: "\f007";
}

.form-group#contrasena-group::before{
    content: "\f023";
}

button{
    width: 60%;
    margin: 5px 0 25px;
}