#split-pane {
    display: flex;
    flex-direction: row;
    gap: 50px;
}

#left-pane {
    display: flex;
    width: calc((100vw - 900px) / 2);
    min-width: fit-content;
    height: calc(100vh);
    background: var(--background-secondary);
    border-right: 5px solid var(--background-highlight);
    justify-content: flex-end;
    position: sticky;
    top: 0;
    overflow-y: auto;
}

#right-pane {
    display: flex;
    margin: 0 auto;
    gap: 40px;
    flex: 1;
    padding-bottom: 500px;
    padding-right: 50px;
}

#main {
    order: 2;
    max-width: 900px;
    flex: 1;
}