QToolBox seamless tab title and content

[ktechhydle]

Hey all. I am trying to style my QToolBox similar to one like Blenders:

Notice how the tab title and widget are seamlessly connected? Well I tried this with QSS stylesheets, and heres the result

As you can see, I pretty much have it dialed, except for the internal QWidget. I am getting a natural gap between tab title and widget, how can I remove it? Is it stylesheet related, or is it code? Any help is appreciated, and heres my stylesheet:

QToolBox
{
    background-color: #303030;
    padding: 10px 10px 10px 10px;
}

QToolBox::tab {
    background-color: #3d3d3d;
    border: 1px solid #3d3d3d;
    border-radius: 5px;
    font-weight: bold;
    color: #c2c2c2;
    image: url('mp_software_stylesheets/assets/triangle-right.svg');
    image-position: left;
}

QToolBox::tab:hover
{
    background-color: #606060;
    color: white;
}

QToolBox::tab:selected
{
    image: url('mp_software_stylesheets/assets/triangle-down.svg');
    border-bottom-left-radius: 0px;
    border-bottom-right-radius: 0px;
}