body {
            background-color: #eef2f3;
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 100vh;
            margin: 0;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        .login-container {
            width: 100%;
            max-width: 400px;
            padding: 15px;
        }

        .card {
            border: none;
            border-radius: 20px;
            /* Lebih rounded agar modern */
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            padding: 40px !important;
        }

        .form-control {
            border-radius: 10px;
            padding: 12px;
            background-color: #f8f9fa;
            border: 1px solid #dee2e6;
        }

        .btn-primary {
            border-radius: 10px;
            padding: 12px;
            background-color: #0d6efd;
            font-weight: 600;
            transition: transform 0.2s;
        }

        .btn-primary:hover {
            transform: scale(1.02);
        }

        /* Penyesuaian untuk HP */
        @media (max-width: 576px) {
            .card {
                padding: 25px !important;
            }

            h4 {
                font-size: 1.25rem;
            }
        }