body{font-family: sans-serif;}
.login-image img {          
    width:100%;
    height:100vh;
    object-fit: cover;
 }
 .sidebar {
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    width: 250px;
    background-color:#343a40;
    padding-top: 20px;
}
.sidebar .nav-link, .sidebar h4 {
    padding: 10px 15px;
    color:#fff;
}
.content {
    margin-left: 250px;
    padding: 2px;
}
.sidebar .nav-link {
    border-bottom: 1px solid;
}
.navbar-custom {
    background-color: #343a40;
    color: white;
}
form label.error {
    color: #f80404;
    font-size: 15px;
    font-style: italic;
}
form .sub_btn{margin:0 auto; display: block;}
@media(max-width:767px){
    .sidebar {display: none;}
    .content{margin-left:0px;}
    .login-image img { height:auto;}
    form .sub_btn{width:100% !important;}
}