#end-of-sample-popup {
    z-index: 9999;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    text-align: center;
    padding: 20px;
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

#end-of-sample-popup.visible {
    display: block;
    opacity: 1;
}

p, button {
    font-family: "Montserrat", sans-serif;
}

#end-of-sample-popup button {
    margin: 10px;
    padding: 10px 20px;
    background: #007bff;
    color: white;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}

#end-of-sample-popup button:hover {
    background: #0056b3;
}

#popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9998;
    display: none; /* Initially hidden */
}

#end-of-sample-popup button#close-popup {
    position: absolute;
    top: 10px;
    right: 10px;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
}

.flowpaper_viewer {
    z-index: 1; /* Lowered to prevent it from covering the popup */
}

.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: center;
    background-color: rgba(255, 255, 255, 1);
    z-index: 2;
}
.loading img {
    width: 50px; /* Adjust the size as needed */
    height: 50px;
}