/**
 * Kashiwazaki SEO Headline Generator - Table of Contents Styles
 */

/* 目次コンテナ */
.kashiwazaki-toc {
    background: #f8f9fa;
    border: 1px solid #dee2e6;
    border-radius: 8px;
    margin: 1.5em 0;
    padding: 0;
    max-width: 100%;
    font-size: 0.95em;
}

/* ヘッダー */
.kashiwazaki-toc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: #e9ecef;
    border-radius: 7px 7px 0 0;
    border-bottom: 1px solid #dee2e6;
}

.kashiwazaki-toc.is-open .kashiwazaki-toc-header {
    border-radius: 7px 7px 0 0;
}

.kashiwazaki-toc:not(.is-open) .kashiwazaki-toc-header {
    border-radius: 7px 7px 0 0;
    border-bottom: 1px solid #dee2e6;
}

/* タイトル */
.kashiwazaki-toc-title {
    font-weight: 600;
    color: #333;
    font-size: 1em;
}

/* トグルボタン */
.kashiwazaki-toc-toggle {
    background: none;
    border: none;
    padding: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 4px;
}

.kashiwazaki-toc-toggle:hover {
    background: rgba(0, 0, 0, 0.08);
}

.kashiwazaki-toc-toggle:focus {
    outline: 2px solid #007bff;
    outline-offset: 2px;
}

/* トグルアイコン（シェブロン） */
.toggle-icon {
    display: block;
    width: 10px;
    height: 10px;
    border-right: 2px solid #495057;
    border-bottom: 2px solid #495057;
    transform: rotate(45deg);
    transition: transform 0.3s ease;
    margin-top: -3px;
}

/* 開いている状態でアイコンを上向きに */
.kashiwazaki-toc.is-open .toggle-icon {
    transform: rotate(-135deg);
    margin-top: 3px;
}

/* コンテンツ */
.kashiwazaki-toc-content {
    padding: 16px;
    position: relative;
}

/* 閉じた状態でのプレビュー表示 */
.kashiwazaki-toc:not(.is-open) .kashiwazaki-toc-content {
    max-height: 180px;
    overflow: hidden;
}

/* 閉じた状態のフェードアウト効果 */
.kashiwazaki-toc:not(.is-open) .kashiwazaki-toc-content::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(
        to bottom,
        rgba(248, 249, 250, 0) 0%,
        rgba(248, 249, 250, 0.8) 50%,
        rgba(248, 249, 250, 1) 100%
    );
    pointer-events: none;
}

/* リスト（ol/ul両対応） */
.kashiwazaki-toc-list,
ol.kashiwazaki-toc-list,
ul.kashiwazaki-toc-list {
    margin: 0;
    padding: 0;
    list-style: none !important;
    counter-reset: toc-counter;
}

.kashiwazaki-toc-sublist,
ol.kashiwazaki-toc-sublist,
ul.kashiwazaki-toc-sublist {
    margin: 0;
    padding: 0 0 0 1.5em;
    list-style: none !important;
    counter-reset: toc-counter;
}

/* 番号なしモード */
.kashiwazaki-toc-list.no-numbering,
.kashiwazaki-toc-sublist.no-numbering {
    list-style-type: none !important;
}

/* アイテム */
.kashiwazaki-toc-item {
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

.kashiwazaki-toc-item + .kashiwazaki-toc-item {
    margin-top: 6px;
}

/* リンク */
.kashiwazaki-toc-item a {
    color: #333;
    text-decoration: none;
    display: block;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.kashiwazaki-toc-item a:hover {
    background: #e9ecef;
    color: #007bff;
}

.kashiwazaki-toc-item a:focus {
    outline: 2px solid #007bff;
    outline-offset: 1px;
}

/* 番号 */
.toc-number {
    color: #6c757d;
    font-weight: 500;
    margin-right: 0.3em;
}

/* レベル別スタイル */
.kashiwazaki-toc-item.level-2 a {
    font-weight: 500;
}

.kashiwazaki-toc-item.level-3 a {
    font-size: 0.95em;
}

.kashiwazaki-toc-item.level-4 a,
.kashiwazaki-toc-item.level-5 a,
.kashiwazaki-toc-item.level-6 a {
    font-size: 0.9em;
    color: #555;
}

/* レスポンシブ */
@media screen and (max-width: 600px) {
    .kashiwazaki-toc {
        font-size: 0.9em;
    }

    .kashiwazaki-toc-header {
        padding: 10px 12px;
    }

    .kashiwazaki-toc-content {
        padding: 12px;
    }

    .kashiwazaki-toc-sublist {
        padding-left: 1em;
    }
}

/* カラースキーム: ブルー */
.kashiwazaki-toc.scheme-blue {
    background: #e3f2fd;
    border-color: #90caf9;
}

.kashiwazaki-toc.scheme-blue .kashiwazaki-toc-header {
    background: #bbdefb;
    border-color: #90caf9;
}

.kashiwazaki-toc.scheme-blue .kashiwazaki-toc-title {
    color: #1565c0;
}

.kashiwazaki-toc.scheme-blue .toggle-icon {
    border-color: #1565c0;
}

.kashiwazaki-toc.scheme-blue .kashiwazaki-toc-toggle:hover {
    background: rgba(21, 101, 192, 0.1);
}

.kashiwazaki-toc.scheme-blue .kashiwazaki-toc-item a {
    color: #1565c0;
}

.kashiwazaki-toc.scheme-blue .kashiwazaki-toc-item a:hover {
    background: #bbdefb;
    color: #0d47a1;
}

.kashiwazaki-toc.scheme-blue .toc-number {
    color: #42a5f5;
}

.kashiwazaki-toc.scheme-blue:not(.is-open) .kashiwazaki-toc-content::after {
    background: linear-gradient(
        to bottom,
        rgba(227, 242, 253, 0) 0%,
        rgba(227, 242, 253, 0.8) 50%,
        rgba(227, 242, 253, 1) 100%
    );
}

/* カラースキーム: グリーン */
.kashiwazaki-toc.scheme-green {
    background: #e8f5e9;
    border-color: #a5d6a7;
}

.kashiwazaki-toc.scheme-green .kashiwazaki-toc-header {
    background: #c8e6c9;
    border-color: #a5d6a7;
}

.kashiwazaki-toc.scheme-green .kashiwazaki-toc-title {
    color: #2e7d32;
}

.kashiwazaki-toc.scheme-green .toggle-icon {
    border-color: #2e7d32;
}

.kashiwazaki-toc.scheme-green .kashiwazaki-toc-toggle:hover {
    background: rgba(46, 125, 50, 0.1);
}

.kashiwazaki-toc.scheme-green .kashiwazaki-toc-item a {
    color: #2e7d32;
}

.kashiwazaki-toc.scheme-green .kashiwazaki-toc-item a:hover {
    background: #c8e6c9;
    color: #1b5e20;
}

.kashiwazaki-toc.scheme-green .toc-number {
    color: #66bb6a;
}

.kashiwazaki-toc.scheme-green:not(.is-open) .kashiwazaki-toc-content::after {
    background: linear-gradient(
        to bottom,
        rgba(232, 245, 233, 0) 0%,
        rgba(232, 245, 233, 0.8) 50%,
        rgba(232, 245, 233, 1) 100%
    );
}

/* カラースキーム: オレンジ */
.kashiwazaki-toc.scheme-orange {
    background: #fff3e0;
    border-color: #ffcc80;
}

.kashiwazaki-toc.scheme-orange .kashiwazaki-toc-header {
    background: #ffe0b2;
    border-color: #ffcc80;
}

.kashiwazaki-toc.scheme-orange .kashiwazaki-toc-title {
    color: #e65100;
}

.kashiwazaki-toc.scheme-orange .toggle-icon {
    border-color: #e65100;
}

.kashiwazaki-toc.scheme-orange .kashiwazaki-toc-toggle:hover {
    background: rgba(230, 81, 0, 0.1);
}

.kashiwazaki-toc.scheme-orange .kashiwazaki-toc-item a {
    color: #e65100;
}

.kashiwazaki-toc.scheme-orange .kashiwazaki-toc-item a:hover {
    background: #ffe0b2;
    color: #bf360c;
}

.kashiwazaki-toc.scheme-orange .toc-number {
    color: #ffa726;
}

.kashiwazaki-toc.scheme-orange:not(.is-open) .kashiwazaki-toc-content::after {
    background: linear-gradient(
        to bottom,
        rgba(255, 243, 224, 0) 0%,
        rgba(255, 243, 224, 0.8) 50%,
        rgba(255, 243, 224, 1) 100%
    );
}

/* カラースキーム: パープル */
.kashiwazaki-toc.scheme-purple {
    background: #f3e5f5;
    border-color: #ce93d8;
}

.kashiwazaki-toc.scheme-purple .kashiwazaki-toc-header {
    background: #e1bee7;
    border-color: #ce93d8;
}

.kashiwazaki-toc.scheme-purple .kashiwazaki-toc-title {
    color: #7b1fa2;
}

.kashiwazaki-toc.scheme-purple .toggle-icon {
    border-color: #7b1fa2;
}

.kashiwazaki-toc.scheme-purple .kashiwazaki-toc-toggle:hover {
    background: rgba(123, 31, 162, 0.1);
}

.kashiwazaki-toc.scheme-purple .kashiwazaki-toc-item a {
    color: #7b1fa2;
}

.kashiwazaki-toc.scheme-purple .kashiwazaki-toc-item a:hover {
    background: #e1bee7;
    color: #4a148c;
}

.kashiwazaki-toc.scheme-purple .toc-number {
    color: #ab47bc;
}

.kashiwazaki-toc.scheme-purple:not(.is-open) .kashiwazaki-toc-content::after {
    background: linear-gradient(
        to bottom,
        rgba(243, 229, 245, 0) 0%,
        rgba(243, 229, 245, 0.8) 50%,
        rgba(243, 229, 245, 1) 100%
    );
}

/* カラースキーム: ダーク */
.kashiwazaki-toc.scheme-dark {
    background: #2d2d2d;
    border-color: #444;
}

.kashiwazaki-toc.scheme-dark .kashiwazaki-toc-header {
    background: #3d3d3d;
    border-color: #444;
}

.kashiwazaki-toc.scheme-dark .kashiwazaki-toc-title {
    color: #e0e0e0;
}

.kashiwazaki-toc.scheme-dark .toggle-icon {
    border-color: #ccc;
}

.kashiwazaki-toc.scheme-dark .kashiwazaki-toc-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.kashiwazaki-toc.scheme-dark .kashiwazaki-toc-toggle:hover .toggle-icon {
    border-color: #fff;
}

.kashiwazaki-toc.scheme-dark .kashiwazaki-toc-item a {
    color: #e0e0e0;
}

.kashiwazaki-toc.scheme-dark .kashiwazaki-toc-item a:hover {
    background: #3d3d3d;
    color: #66b3ff;
}

.kashiwazaki-toc.scheme-dark .toc-number {
    color: #999;
}

.kashiwazaki-toc.scheme-dark .kashiwazaki-toc-item.level-4 a,
.kashiwazaki-toc.scheme-dark .kashiwazaki-toc-item.level-5 a,
.kashiwazaki-toc.scheme-dark .kashiwazaki-toc-item.level-6 a {
    color: #bbb;
}

.kashiwazaki-toc.scheme-dark:not(.is-open) .kashiwazaki-toc-content::after {
    background: linear-gradient(
        to bottom,
        rgba(45, 45, 45, 0) 0%,
        rgba(45, 45, 45, 0.8) 50%,
        rgba(45, 45, 45, 1) 100%
    );
}

/* ダークモード対応（prefers-color-scheme） */
@media (prefers-color-scheme: dark) {
    .kashiwazaki-toc {
        background: #2d2d2d;
        border-color: #444;
    }

    .kashiwazaki-toc-header {
        background: #3d3d3d;
        border-color: #444;
    }

    .kashiwazaki-toc-title {
        color: #e0e0e0;
    }

    .toggle-icon {
        border-color: #ccc;
    }

    .kashiwazaki-toc-toggle:hover {
        background: rgba(255, 255, 255, 0.1);
    }

    .kashiwazaki-toc-toggle:hover .toggle-icon {
        border-color: #fff;
    }

    .kashiwazaki-toc-item a {
        color: #e0e0e0;
    }

    .kashiwazaki-toc-item a:hover {
        background: #3d3d3d;
        color: #66b3ff;
    }

    .toc-number {
        color: #999;
    }

    .kashiwazaki-toc-item.level-4 a,
    .kashiwazaki-toc-item.level-5 a,
    .kashiwazaki-toc-item.level-6 a {
        color: #bbb;
    }

    /* ダークモード用フェード効果 */
    .kashiwazaki-toc:not(.is-open) .kashiwazaki-toc-content::after {
        background: linear-gradient(
            to bottom,
            rgba(45, 45, 45, 0) 0%,
            rgba(45, 45, 45, 0.8) 50%,
            rgba(45, 45, 45, 1) 100%
        );
    }
}