body {
            font-family: 'Poppins', sans-serif;
            background: 
                linear-gradient(135deg, rgba(29, 53, 87, 0.8), rgba(69, 123, 157, 0.5)),
                url('<?php echo $randomImage; ?>');
            background-size: cover;
            background-position: center;
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            color: #fff;
        }

        .login-container {
            background: rgba(30, 30, 45, 0.3);
            padding: 2rem;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
            text-align: center;
            backdrop-filter: blur(10px); 
            border-radius: 10px; 
        }
        .form-control {
            background: #2c2c3d;
            color: #fff;
            border: none;
        }
        .form-control:focus {
            box-shadow: none;
            border: 1px solid #457b9d;
        }
        .btn-primary {
            background: #457b9d;
            border: none;
        }
        .btn-primary:hover {
            background: #1d3557;
        }
        .logo {
            margin-bottom: 1.5rem;
        }
        .logo img {
            width: 150px;
        }