body {
            font-family: Arial, sans-serif;
            background-color: #f8f9fa;
            padding-top: 60px;
        }
.row{
display:flex;}

        .container {
            max-width: 800px;
            margin: 0 auto;
        }
        .card {
            margin-bottom: 20px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
            transition: 0.3s;
        }
        .card:hover {
            box-shadow: 0 8px 16px rgba(0,0,0,0.2);
        }
        .card-body {
            padding: 20px;
        }
        .btn {
            background-color: #007bff;
            color: #fff;
            border: none;
            padding: 10px 20px;
            cursor: pointer;
        }
        .btn:hover {
            background-color: #0056b3;
        }
        .loader {
            display: none;
            text-align: center;
            margin-top: 20px;
        }
    \