.studio-loading
{
    border: 4px solid yellow;
}

.studio-done
{
    border: 4px solid green;
}

.studio-error
{
    border: 4px solid red;
}

.studio-el
{
    opacity: 0;
    transition: opacity 0.6s;
}

.studio-el.visible
{
    opacity: 1;
}