body {
            background: linear-gradient(135deg, #fff5f5 0%, #fff9f0 50%, #fff5f5 100%);
            min-height: 100vh;
            margin: 0;
            padding: 20px 0;
        }
        .container {
            background-color: rgba(255, 255, 255, 0.95);
            border-radius: 15px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.08);
            padding: 30px;
            margin-top: 20px;
            position: relative;
        }
        .card {
            border: none;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15), 0 3px 10px rgba(0, 0, 0, 0.1);
            border-radius: 10px;
            transition: box-shadow 0.3s ease;
        }
        .card:hover {
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2), 0 5px 15px rgba(0, 0, 0, 0.15);
        }
        .card-body {
            padding: 25px;
        }
        .btn-primary {
            background-color: #fe402e;
            border-color: #fe402e;
        }
        .btn-primary:hover {
            background-color: #e6392b;
            border-color: #e6392b;
        }
        .validation-message {
            display: none;
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: white;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
            z-index: 1000;
            max-width: 90%;
            width: 400px;
        }
        .validation-message.show {
            display: block;
        }
        .validation-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
        }
        .validation-overlay.show {
            display: block;
        }
        .validation-message .btn {
            margin-top: 15px;
        }
        .validation-message .btn-success {
            background-color: #28a745;
            border-color: #28a745;
        }
        .validation-message .btn-success:hover {
            background-color: #218838;
            border-color: #1e7e34;
        }