#panel, .flip {
    display: inline;
    font-size: 16px;
    padding: 10px;
    text-align: center;
    background-color: #4CAF50;
    color: white;
    border: solid 1px #a6d8a8;
    margin: auto;
}

#panel {
    display: none;
}

/* Style the tab */
div.tab {
    overflow: hidden;
    border: 1px solid #ccc;
    background-color: #9bbc91;
}

/* Style the buttons inside the tab */
div.tab button {
    font-size: 2rem;
    background-color: inherit;
    float: left;
    border: none;
    outline: none;
    cursor: pointer;
    padding: 14px 16px;
    transition: 0.3s;
}

/* Change background color of buttons on hover */
div.tab button:hover {
    background-color: #ddd;
}

/* Create an active/current tablink class */
div.tab button.active {
    background-color: #ccc;
}

/* Style the tab content */
.tabcontent {
    display: none;
    padding: 6px 12px;
    border: 1px solid #ccc;
    border-top: none;
}