.install-popup {
        position: fixed;
        bottom: 20px;
        left: 50%;
        transform: translateX(-50%);
        background: #ffffff;
        border: 1px solid #ccc;
        border-radius: 12px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        padding: 16px;
        z-index: 1000;
        display: none;
        width: 90%;
        max-width: 320px;
        font-family: 'Segoe UI', sans-serif;
        }

        .popup-content {
        text-align: center;
        }

        .install-popup button {
        margin: 8px 4px;
        padding: 10px 16px;
        border: none;
        border-radius: 8px;
        font-size: 14px;
        cursor: pointer;
        }

        #installBtn {
        background-color: #007bff;
        color: white;
        }

        #closePopup {
        background-color: #f0f0f0;
        color: #333;
        }