@charset "utf-8";
.tab-container {
    width: 100%;
    margin: 0 auto;
    border: 1px solid #ccc;
    border-radius: 5px;
    overflow: hidden;
}

.tab-buttons {
    list-style: none;
    padding: 0;
    margin: 0;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    background-color: #F3F6F7;
    /*border-bottom: 1px solid #ccc;*/
}

.tab-buttons li {
    -webkit-box-flex: 1;
        -ms-flex-positive: 1;
            flex-grow: 1;
    text-align: center;
}

.tab-button {
    display: block;
    padding: 10px 15px;
    text-decoration: none;
    color: #777;
    background-color: #F3F6F7;
    border-right: 1px solid #ccc;
    -webkit-transition: background-color 0.3s ease;
    -o-transition: background-color 0.3s ease;
    transition: background-color 0.3s ease;
}

.tab-buttons li:last-child .tab-button {
    border-right: none;
}

.tab-button.active {
    background-color: #6A8D9D;
    color: #fff;
    /*border-bottom: 2px solid #6A8D9D;
    margin-bottom: -1px;*/
}

.tab-content {
    padding: 20px;
    background-color: #fff;
    display: none; /* 初期状態では非表示 */
}

.tab-content.active {
    display: block; /* アクティブなタブだけ表示 */
}