.tab-btn
{
    background-color: transparent;
    color: #FFF;
    margin: 10px;
    padding: 5px;
    width: 100%;
    font-size: 32px;
    text-decoration: none;
    border-style: solid;
    border-radius: 5rem;
    border-color: #00FF80;
    border-width: 2px;
    animation: button_leave 0.030s linear;
}

.tab-btn:hover
{
    font-size: 34px;
    padding: 10px;
    border-color: #FFF;
    border-width: 4px;
    box-shadow: 0px 0px 10px #00FF80, inset 0px 0px 10px #00FF80;
    animation: button_hover 0.030s linear;
}

.tab-div
{
    width: 100%;
    height: 50rem;
    max-height: calc(100vh - 650px);
}

@keyframes button_hover
{
    from
    {
        font-size: 32px;
        padding: 20px;
        border-color: #00FF80;
        border-width: 2px;
        box-shadow: 0px 0px 0px #00FF80, inset 0px 0px 0px #00FF80;
    }
    to
    {
        font-size: 34px;
        padding: 22px;
        border-color: #FFF;
        border-width: 4px;
        box-shadow: 0px 0px 10px #00FF80, inset 0px 0px 10px #00FF80;
    }
}

@keyframes button_leave
{
    from
    {
        font-size: 34px;
        padding: 22px;
        border-color: #FFF;
        border-width: 4px;
        box-shadow: 0px 0px 10px #00FF80, inset 0px 0px 10px #00FF80;
    }
    to
    {
        font-size: 32px;
        padding: 20px;
        border-color: #00FF80;
        border-width: 2px;
        box-shadow: 0px 0px 0px #00FF80, inset 0px 0px 0px #00FF80;
    }
}

.hidden
{
    visibility: hidden;
    height: 0;
}