port-ui/app/static/css/custom_scrollbar.css

/* Set the scroll container to only scroll vertically */
.scroll-container {
    overflow-y: auto;
    overflow-x: hidden;
    /* Hide native scrollbar */
    scrollbar-width: none; /* Firefox */
}

.scroll-container::-webkit-scrollbar {
    display: none; /* WebKit */
}

#custom-scrollbar {
    position: fixed;
    top: 0;
    right: 0;
    width: 8px;
    /* height: 100vh;  <-- remove or adjust this line */
    background: transparent;
    transition: opacity 0.3s ease;
    opacity: 1;
}

/* The scrollbar thumb */
#scroll-thumb {
    position: absolute;
    top: 0;
    width: 100%;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}