body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: #121212;
            color: #e0e0e0;
            margin: 0;
            padding: 40px 20px;
        }

        .container {
            max-width: 600px;
            margin: auto;
            background-color: #1e1e1e;
            border-radius: 12px;
            padding: 30px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
            border-left: 6px solid <?= ($data['status'] ?? '') === 'success' ? '#4caf50' : '#f44336' ?>;
        }

        .result-title {
            font-size: 22px;
            font-weight: bold;
            margin-bottom: 16px;
            color: <?= ($data['status'] ?? '') === 'success' ? '#4caf50' : '#f44336' ?>;
        }

        .result-message {
            font-size: 16px;
            line-height: 1.6;
            color: #ccc;
        }

        .back-btn {
            display: inline-block;
            margin-top: 24px;
            padding: 10px 20px;
            background-color: #333;
            color: #fff;
            border-radius: 6px;
            text-decoration: none;
            font-size: 14px;
            transition: background-color 0.2s ease;
        }

        .back-btn:hover {
            background-color: #555;
        }

        @media (max-width: 600px) {
            .container {
                padding: 20px;
            }
        }