.tab-group {
    margin-top: 20px;
    /* タブ全体の幅 */
    width: 700px;
    list-style: none;
    text-align: center;
}

.tab-button {
    display: flex;
    justify-content: space-between;
    list-style: none;
    /* カーソル形状を指先にする */
    cursor: pointer;
}

.tab-button .is-active {
    background: #4bab80;
    border: 2px solid #4bab80;
    color: #FFF;
}

.tab {
    width: calc(100% / 3);
    border: 2px solid #ccebdc;
    padding: 8px;
    border-bottom: none;
}

.tab-contents {
    border-top: none;
    background: #ccebdc;
}

.content {
    display: none;
    padding: 8px;
    text-align: left;
}

.content.is-display {
    display: block;
    border: 2px solid #4bab80;
    height: 500px;
}