body {
            background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            background: #fff;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        .card-header {
            background: linear-gradient(135deg, #6a11cb, #2575fc);
            color: white;
            text-align: center;
            padding: 20px;
            font-size: 1.5rem;
            font-weight: bold;
        }

        .card-body {
            padding: 30px;
        }

        .form-group label {
            font-weight: bold;
            color: #333;
        }

        .form-control {
            border-radius: 10px;
            border: 1px solid #ddd;
            padding: 10px;
        }

        .btn-primary {
            background: linear-gradient(135deg, #6a11cb, #2575fc);
            border: none;
            border-radius: 10px;
            padding: 10px;
            font-size: 1rem;
            font-weight: bold;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #2575fc, #6a11cb);
        }