body.dark-theme {
    background-color: #121212;
    color: #eee;
    font-family: Arial, sans-serif;
}

.container { max-width: 1200px; margin: auto; padding: 20px; }
h1,h2 { color: #fff; }

.logout { float:right; color:#f88; text-decoration:none; margin-bottom:20px; }

table.dataTable { color:#fff; background:#1e1e1e; }
table.dataTable th, table.dataTable td { color:#fff; }

.login-box { background:#1e1e1e; padding:40px; max-width:400px; margin:100px auto; border-radius:10px; }
.login-box input { width:100%; padding:10px; margin:10px 0; border:none; border-radius:5px; }
.login-box button { width:100%; padding:10px; background:#28a745; color:#fff; border:none; border-radius:5px; cursor:pointer; }
.login-box button:hover { background:#218838; }
.error { color:red; }