.feedback-button {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: #007bff;
            color: white;
            border: none;
            padding: 12px 20px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 14px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
            transition: background 0.3s;
            z-index: 1100;
        }
        .feedback-button:hover {
            background: #0056b3;
        }
        .overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.6);
            display: flex;
            align-items: center;
            justify-content: center;
            visibility: hidden;
            opacity: 0;
            transition: opacity 0.3s ease, visibility 0.3s;
            z-index: 1000;
        }
        .popup {
            background: white;
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
            width: 320px;
            text-align: center;
            position: relative;
            animation: fadeIn 0.3s ease-in-out;
            z-index: 1101;
        }
        .popup h2 {
            margin-top: 0;
            color: #333;
        }
        .popup input, .popup textarea {
            width: 100%;
            margin: 10px 0;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 14px;
        }
        .popup button {
            background: #007bff;
            color: white;
            border: none;
            padding: 12px;
            border-radius: 6px;
            cursor: pointer;
            width: 100%;
            font-size: 16px;
            transition: background 0.3s;
        }
        .popup button:hover {
            background: #0056b3;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(-10px); }
            to { opacity: 1; transform: translateY(0); }
        }