/* ===== 目次セクション ===== */
.toc-wrapper {
    max-width: 900px;
    margin: 30px auto 50px;
    padding: 30px 30px 20px;
    background: #f8f9fa;
    border: 2px solid #0066cc;
    border-radius: 6px;
}

.toc-wrapper h3.toc-title {
    font-size: 20px;
    font-weight: bold;
    margin: 0 0 15px;
    padding: 0 0 10px;
    border-bottom: 2px solid #0066cc;
    color: #333;
}

/* ========================================
   全リスト要素の完全リセット
   サイト既存CSSに ul>li { padding-left:1em }
   ol>li { list-style:decimal } があるため、
   それらを確実に打ち消す
   ======================================== */
.toc-wrapper ol,
.toc-wrapper ul {
    list-style: none !important;
    list-style-type: none !important;
    margin: 0 !important;
    padding: 0 !important;
}

.toc-wrapper li,
.toc-wrapper ol>li,
.toc-wrapper ul>li {
    list-style: none !important;
    list-style-type: none !important;
    margin: 0 !important;
    margin-bottom: 0 !important;
    padding: 0 !important;
    padding-left: 0 !important;
    position: static !important;
}

/* サイト既存CSS styles.css の
   ul > li:before { content: "・" } を打ち消す */
.toc-wrapper li:before,
.toc-wrapper ol>li:before,
.toc-wrapper ul>li:before {
    content: none !important;
    display: none !important;
}

/* 大項目（◆1〜5）: 青色 + 太字 + 下線 */
.toc-list>li>a,
.toc-list>li>.toc-accordion-header>a {
    display: block;
    padding: 8px 0;
    color: #0066cc;
    font-weight: bold;
    text-decoration: underline;
    font-size: 16px;
    line-height: 1.6;
    transition: opacity 0.2s;
}

.toc-list>li>a:hover,
.toc-list>li>.toc-accordion-header>a:hover {
    opacity: 0.7;
}

/* ◆3,◆4内の下線テキスト: 赤字で強調（PDF指示） */
.toc-list a u {
    color: #cc0000;
    text-decoration: underline;
}

/* 中間項目リスト（２の直下 国税/関税/県税/市町村税） */
.toc-wrapper ul.toc-sub {
    padding-left: 20px !important;
}

/* アコーディオンヘッダー行 */
.toc-accordion-header {
    display: flex;
    align-items: flex-start;
}

.toc-accordion-header>a {
    flex: 1;
}

/* ＋/ー トグルボタン */
.toc-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    margin-top: 8px;
    margin-right: 8px;
    border: 1px solid #999;
    background: #fff;
    color: #666;
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    flex-shrink: 0;
    user-select: none;
    border-radius: 2px;
    transition: background 0.2s;
}

.toc-toggle:hover {
    background: #eee;
}

/* 中項目（国税等）: 太字 */
.toc-wrapper .toc-accordion-trigger {
    display: flex;
    align-items: center;
    padding: 5px 0;
    cursor: pointer;
    user-select: none;
}

.toc-wrapper .toc-mid-label {
    font-weight: bold;
    font-size: 15px;
    color: #333;
}

/* 小項目リスト（投資税額控除等） */
.toc-wrapper ul.toc-sub-detail {
    padding-left: 30px !important;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.toc-wrapper ul.toc-sub-detail.is-open {
    max-height: 500px;
}

.toc-wrapper .toc-sub-detail li a {
    display: block;
    padding: 3px 0;
    color: #333;
    text-decoration: none;
    font-size: 14px;
    line-height: 1.5;
}

.toc-wrapper .toc-sub-detail li a:hover {
    color: #0066cc;
    text-decoration: underline;
}

/* ３の子項目, ４の子項目 */
.toc-wrapper ul.toc-child {
    padding-left: 20px !important;
}

.toc-wrapper .toc-child li a {
    display: block;
    padding: 4px 0;
    color: #333;
    text-decoration: none;
    font-size: 15px;
    line-height: 1.5;
}

.toc-wrapper .toc-child li a:hover {
    color: #0066cc;
    text-decoration: underline;
}

/* レスポンシブ */
@media screen and (max-width: 768px) {
    .toc-wrapper {
        margin: 20px 15px 30px;
        padding: 20px 15px 15px;
    }

    .toc-list>li>a,
    .toc-list>li>.toc-accordion-header>a {
        font-size: 14px;
        line-height: 1.5;
    }
}