body
{
    display: flex;
    justify-content: center;
}

#main_panel
{
    position: absolute;
    width: 130vh;
    height: 95vh;

    background: #6F7270;

    border: 1px solid #3E392F;
    border-radius: 0.4vh 0.4vh;

    margin-top: 1.5vh;
}

#upper_panel
{
    margin-left: auto;

    border: 1px solid #3E392F;
    border-right: none;
    border-top: none;
    border-bottom-left-radius: 0.4vh 0.4vh;

    width: fit-content;
    height: 2vh;

    display: flex;
    justify-content: end;
    padding: 0.25vh;
}

#upper_panel *
{
    border-collapse: collapse;
}

img + img
{
    margin-left: 0.25vh;
}

img:hover
{
    filter: invert(25%);
}

#panels
{
    display: flex;
    height: 88.5vh;
}

#left_panel, #right_panel
{
    width: 50%;
    height: 100%;

    padding: 2vh;
}

#left_panel
{
    border-right: 1px solid #3E392F;
}