:root {
    --panel-bg: #f5f5f5;
    --text: #1c1816;
    --text-secondary: #716d6a;
    --hairline: #d5d4d2;
    --accent: #d3320c;
    --accent-soft: rgb(211 115 12 / 8%);
    --accent-line: rgb(211 115 12 / 30%);
    --paren-note: #73655e;
    --ui-font: -apple-system, BlinkMacSystemFont, "SF Pro JP", "Hiragino Sans", "Hiragino Kaku Gothic ProN", sans-serif;
    --shadow-opacity: 0.14;
    scroll-behavior: smooth;
    scroll-padding-top: 44px;
  }
  body.dark {
   --panel-bg: #2b2a29;
    --text: #ecebe8;
    --text-secondary: #a39d97;
    --hairline: #3c3a37;
    --accent: #f16940;
    --accent-soft: rgb(255 106 61 / 14%);
    --accent-line: rgb(255 106 61 / 30%);
    --paren-note: #ab9e97;
    --shadow-opacity: 0.08;
  }
  .dark main h4{color:#cdbfaa;}
  .tkv-app, .tkv-page, .tkv-app *, .tkv-page * { box-sizing: border-box; }
  .tkv-app, .tkv-page {
    -webkit-font-smoothing: antialiased;
    text-autospace: normal;
  }
  .tkv-header { padding-bottom: 4px; border-bottom: 1px solid var(--hairline); }
  .tkv-eyebrow {
    position: absolute; left: 50%; transform: translateX(-50%);
    font-size: 13px; color: var(--text-secondary); text-decoration: none;
    white-space: nowrap; pointer-events: auto;
  }
  .tkv-eyebrow:hover { color: var(--accent); text-decoration: underline; }
  .tkv-heading { font-size: 24px; font-weight: 600; letter-spacing: -0.01em; }
  .tkv-heading .tkv-title { font-weight: 400; color: var(--text-secondary); font-size: 16px; }

  .tkv-layout { display: grid; grid-template-columns: 1fr; align-items: start; }
  /* ---- side panel（基本＝デスクトップ。条文の下に積む構成） ---- */
  .tkv-side { box-shadow: inset 0 0 30px rgba(var(--pure-black), 5%); padding: 20px; border-radius: 12px; margin-top: 24px; font-size: 14px; }
  .tkv-side-close-btn { display: none; } /* デスクトップでは常に非表示（モバイルのみメディアクエリで上書き） */

  @media (max-width: 860px) {
    .tkv-eyebrow { display: none; }
    .tkv-side {
      display: block; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60;
      background: var(--main-bg); border-radius: 16px 16px 0 0;
      box-shadow: 0 -6px 24px rgba(var(--pure-black),var(--shadow-opacity));
      height: 64px; 
      transition: height .6s var(--spring-snappy);
      padding: 0; margin-top: 0;
    }
    .dark .tkv-side{ border-top: 1px solid var(--dark-border); }
    .tkv-side.tkv-dragging { transition: none; }
    .tkv-side-drawer-handle {
      height: 32px; display: flex; align-items: center; justify-content: center;
      cursor: grab; touch-action: none;
    }
    .tkv-side-drawer-handle::before { content: ''; width: 36px; height: 4px; border-radius: 2px; background: var(--hairline); }
    .tkv-side-close-btn {
      display: none; position: absolute; top: 6px; right: 18px;
      width: 22px; height: 20px; border-radius: 4px;
      color: var(--text-secondary); font-size: 17px; line-height: 1;
      align-items: center; justify-content: center; cursor: pointer;
    }
    .tkv-side.tkv-expanded .tkv-side-close-btn { display: flex; }
    .tkv-side .tkv-tabs { margin: 0 16px 12px; }
    .tkv-side .tkv-panel-content { display: none; padding: 12px 20px 28px; overflow-y: auto; max-height: calc(100% - 60px); -webkit-overflow-scrolling: touch; }
    .tkv-side.tkv-expanded .tkv-panel-content { display: block; }
  }

  .tkv-content { padding: 32px 0 80px; }
  .tkv-paragraph { display: flex; gap: 0; margin-bottom: 26px; scroll-margin-top: 24px; }
  @keyframes highlight-fade {
    0% { background: var(--accent-soft); }
    70% { background: var(--accent-soft); }
    100% { background: transparent; }
  }
  .tkv-paragraph:target .tkv-para-text {
    border-radius: 6px; padding: 4px 8px 4px 32px; margin: -4px -8px -4px -32px;
    animation: highlight-fade 2.4s ease-out forwards;
  }
  /* パネル内へのページ内ジャンプ時の一時的なハイライト（JSでクラスを付け外しする） */
  .tkv-panel-article.tkv-panel-highlight {
    border-radius: 6px;
    animation: highlight-fade 2.4s ease-out forwards;
  }
  .tkv-paragraph.tkv-panel-highlight .tkv-para-text {
    border-radius: 6px;
    padding: 3px 6px 3px 24px; margin: -3px -6px -3px -24px;
    animation: highlight-fade 2.4s ease-out forwards;
  }
  .tkv-para-badge {
    flex: none; width: 24px; height: 24px; border-radius: 50%;
    background: var(--color-eee); color: var(--text-secondary);
    font-size: 12px; font-weight: 600;
    display: flex; align-items: center; justify-content: center; margin-top: 3px;
  }
  .tkv-para-body { flex: 1; min-width: 0; font-size: 16px; }
  .tkv-para-text { line-height: 1.95; letter-spacing: 0.01em; text-indent: 1em; }

  /* 号（漢数字・読点なし）とイロハ（区切りなし）のカスタムカウンター（条文本体用） */
  @counter-style custom-cjk-short {
    system: fixed;
    symbols:
      '一' '二' '三' '四' '五' '六' '七' '八' '九' '十'
      '十一' '十二' '十三' '十四' '十五' '十六' '十七' '十八' '十九' '二十'
      '二十一' '二十二' '二十三' '二十四' '二十五' '二十六' '二十七' '二十八' '二十九' '三十';
    suffix: "";
    fallback: cjk-ideographic;
  }
  @counter-style custom-iroha {
    system: alphabetic;
    symbols: 'イ' 'ロ' 'ハ' 'ニ' 'ホ' 'ヘ' 'ト' 'チ' 'リ' 'ヌ' 'ル' 'ヲ';
    suffix: "";
    fallback: katakana-iroha;
  }
  /* 解釈運用用のカウンター: 号は (1)(2)…、イロハは①②… */
  @counter-style commentary-item-style {
    system: numeric;
    symbols: '0' '1' '2' '3' '4' '5' '6' '7' '8' '9';
    prefix: "(";
    suffix: ") ";
  }
  @counter-style commentary-subitem-style {
    system: fixed;
    symbols: '①' '②' '③' '④' '⑤' '⑥' '⑦' '⑧' '⑨' '⑩' '⑪' '⑫' '⑬' '⑭' '⑮' '⑯' '⑰' '⑱' '⑲' '⑳';
    suffix: " ";
    fallback: decimal;
  }
  ol.tkv-items, ol.tkv-sub-items, ol.tkv-commentary-items, ol.tkv-commentary-sub-items { line-height: 1.9; padding-left: 1em; margin: 10px 0; }
  ol.tkv-items { list-style: none; padding-left: 1em; text-indent: -1em; }
  ol.tkv-sub-items { list-style-type: custom-iroha; text-indent: 1em; }
  ol.tkv-commentary-items { list-style-type: commentary-item-style; }
  ol.tkv-commentary-sub-items { list-style-type: commentary-subitem-style; }

  a.tkv-ref-link {
    color: var(--accent); text-decoration: none;
    border-bottom: 0;
    border-radius: 3px; padding: 0 1px;
  }
  a.tkv-ref-link:hover { background: var(--accent-soft); }

  /* ---- PCでのref-linkホバー時ツールチップ ---- */
  .tkv-tooltip {
    position: fixed; z-index: 200; max-width: 320px;
    background: var(--main-bg); border: 1px solid var(--dark-border); border-radius: 4px;
    padding: 10px 14px; font-size: 13px; line-height: 1.6; color: var(--color-444);
    box-shadow: 0 8px 24px rgba(var(--pure-black),var(--shadow-opacity));
    pointer-events: none; opacity: 0; transition: opacity .12s ease;
  }
  
  .tkv-tooltip.tkv-visible { opacity: 1; }

  /* （）で囲まれた補足部分の注目度を下げる。ネストしたspanはfont-size/opacityが
     掛け合わさるため、入れ子になるほど段階的に小さく・薄くなる。 */
  .tkv-paren-note { font-size: 90%; color: var(--paren-note); }

  /* ---- side panel ---- */
  .tkv-tabs { display: flex; background: rgba(128,125,128,0.12); border-radius: 9px; padding: 2px; margin-bottom: 20px; }
  .tkv-tab { flex: 1; text-align: center; font-size: 13px; font-weight: 500; padding: 6px 4px; border-radius: 7px; cursor: pointer; color: var(--text-secondary); transition: all .18s ease; user-select: none; font-weight: 600; }
  .tkv-tab.tkv-active { background: #fff; color: #1c1816; box-shadow: 0 1px 3px rgba(0,0,0,.12); }
  .tkv-tab:not(.tkv-disabled, .tkv-active):hover { color: inherit; }
  .tkv-tab.tkv-disabled { opacity: .25; cursor: not-allowed; font-weight: normal; }
  .tkv-tab:only-child{ max-width: 33.33%; margin: 0 auto; }
  .tkv-panel-tab-content { display: none; }
  .tkv-panel-tab-content.tkv-active { display: block; }
  .tkv-panel-empty { font-size: 13.5px; color: var(--text-secondary); padding: 40px 8px; text-align: center; line-height: 1.7; }

  .tkv-panel-article { padding: 8px; margin: -8px; }
  .tkv-panel-divider { margin: 24px 0; border: none; border-top: 1px solid var(--hairline); }
  .tkv-panel-article:last-child { border-bottom: none; }
  .tkv-panel-article-title { display: block; font-weight: 600; text-decoration: none; margin-bottom: 10px; letter-spacing: 0; }
  .tkv-panel-article-title:hover { color: var(--accent); }
  .tkv-panel-article-subtitle { font-weight: 400; color: var(--text-secondary); margin-left: 6px; font-size: 90%; }

  .tkv-paragraph-compact { margin-bottom: 0; }
  .tkv-paragraph-compact .tkv-para-body { font-size: 100% }
  .tkv-paragraph-compact .tkv-para-text { line-height: 1.9; }
  .tkv-paragraph-compact .tkv-para-badge { width: 20px; height: 20px; font-size: 10.5px; }

  /* ---- commentary (解釈運用) ---- */
  .tkv-commentary-section { margin-bottom: 22px; padding-bottom: 18px; border-bottom: 1px solid var(--hairline); }
  .tkv-commentary-section:last-child { border-bottom: none; }
  .tkv-commentary-heading { font-size: 12px; color: var(--text-secondary); margin-bottom: 4px; }
  .tkv-commentary-subtitle { font-weight: 600; margin-bottom: 8px; letter-spacing: 0; }
  .tkv-commentary-para { margin-bottom: 12px; }
  .tkv-commentary-para-head { display: flex; gap: 1em; align-items: baseline; margin-bottom: 4px; }
  .tkv-commentary-para-num { font-weight: 600; color: var(--text-secondary); }
  .tkv-commentary-para-title { font-weight: 600; }
  .tkv-commentary-text { line-height: 1.85; text-indent: 1em; }
  ol.tkv-commentary-items, ol.tkv-commentary-sub-items { margin: 8px 0; }
  ol.tkv-commentary-items > li{ margin-bottom: 1.5em; }
  ol.tkv-commentary-items { padding-left: 2em;}
  ol.tkv-commentary-sub-items { padding-left: 1em;}
  /* ---- prev/next article nav ---- */
  .tkv-article-nav {
    display: flex; justify-content: space-between; align-items: center;
    padding: 8px 0 24px; position: relative; }
  .tkv-article-nav-link {
    display: flex; align-items: center; gap: 6px;
    font-size: 16px; font-weight: 500; color: var(--accent); text-decoration: none;
    padding: 10px 4px;
  }
  .tkv-article-nav-link.tkv-next { justify-content: flex-end; text-align: right; }
  .tkv-article-nav-link:hover { text-decoration: underline; }
  .tkv-article-nav-link.tkv-disabled { visibility: hidden; }
  .tkv-article-nav-top .tkv-article-nav-link { font-size: 12px; padding: 4px; }

  /* ---- トップページ(index.html) ---- */
  .tkv-page {}
  .tkv-law-title { font-size: 200%; font-weight: 600; letter-spacing: -0.01em; margin: 0 0 28px; padding-bottom: 8px; border-bottom: 1px solid var(--hairline); scroll-margin-top: 24px; }
  .tkv-law-section { margin-bottom: 56px; scroll-margin-top: 24px; }
  .tkv-chapter-title { font-size: 120%; font-weight: 600; margin: 28px 0 10px; }
  .tkv-chapter-title:first-child { margin-top: 0; }
  .tkv-section-title { font-size: 95%; font-weight: 600; color: var(--text-secondary); margin: 16px 0 8px; background: transparent; padding: 0; border: 0; }
  .tkv-badge-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 8px; }
  .tkv-article-badge {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 12px;
    background: var(--main-bg); border: 1px solid var(--hairline);
    text-decoration: none; transition: background .15s ease;
    overflow: hidden; 
  }
  .tkv-article-badge-num { flex: none; font-size: 13px; font-weight: 600; letter-spacing: -0.01em; }
  .tkv-article-badge-title { font-size: 12px; color: var(--text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .tkv-article-badge:hover { background: var(--accent-soft); border-color: var(--accent-line); }
  .tkv-article-badge:hover .tkv-article-badge-num { color: var(--accent); }

  /* ---- 低頻度条文の表示・トグル ---- */
  .tkv-low-priority-toggle {
    display: block; font-size: 13px; color: var(--text-secondary);
    margin: 20px 0; padding: 8px;
    background: transparent;
    cursor: pointer; user-select: none;
  }
  .tkv-low-priority-toggle input { cursor: pointer; }
  .tkv-article-badge.tkv-low-priority { background: transparent; border: 1px dashed var(--hairline); }
  .tkv-article-badge:hover { border-color: var(--accent-line); }
  .tkv-low-priority-tag {
    flex: none; font-size: 10px; color: #fff; font-weight: normal; vertical-align: middle;
    background: #999; padding: 3px 6px; border-radius: 99px; line-height: 1;
  }
  .tkv-heading .tkv-low-priority-tag{ margin-right: 4px; }
  body.tkv-hide-low-priority .tkv-article-badge.tkv-low-priority { display: none; }
  
  .tkv-law-title, .tkv-chapter-title, .tkv-section-title { font-family: var(--ui-font); padding-left: 4px; letter-spacing: 0; }
  @media (max-width: 860px) {
    .tkv-heading, .tkv-law-title, .tkv-chapter-title, .tkv-section-title, .tkv-low-priority-toggle { padding-left: 12px; }
    .tkv-content, .tkv-article-nav { padding-left: 8px; padding-right: 8px; }
    .tkv-article-badge-num{ font-size: 14px; }
    .tkv-article-badge-title{ font-size: 13px; }
    .tkv-badge-grid{ padding: 0 12px; }
  }
 
  /* ---- /jobun/index.html（宅建六法トップ・法律ごとの起点一覧、試験区分別カード） ---- */
  .tkv-law-category { margin-top: 40px; }
  .tkv-law-category:first-of-type { margin-top: 24px; }
  .tkv-law-category-title {
    font-size: 125%; font-weight: 600; font-family: unset; padding-left: 4px;
  }
  .tkv-law-category-count { font-size: 12px; font-weight: 500; color: var(--text-secondary); }
  .tkv-law-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
  .tkv-law-card {
    display: block; padding: 12px 16px;
    background: var(--main-bg); border: 1px solid var(--hairline); 
    text-decoration: none;
    transition: background .15s ease, transform .15s ease;
  }
  a.tkv-law-card{ color: inherit !important}
  a.tkv-law-card:hover { background: var(--accent-soft); border-color: var(--accent-line); transform: translateY(-1px); text-decoration: none; }
  a.tkv-law-card:hover .tkv-law-card-cta { color: var(--accent); }
  .tkv-law-card-name { font-size: 15px; font-weight: 600; display: flex; align-items: center; gap: 8px; }
  .tkv-law-card-desc { font-size: 12.5px; color: var(--text-secondary); line-height: 1.6; margin: 6px 0 0; }
  .tkv-law-card-cta { font-size: 12.5px; font-weight: 500; color: var(--text-secondary); margin-top: 12px; }
  .tkv-law-card-arrow { margin-left: 4px; }
  .tkv-law-card--disabled { opacity: .6; cursor: default; }
  .tkv-law-card-badge {
    font-size: 10.5px; font-weight: 600; color: var(--text-secondary);
    background: var(--main-bg); border-radius: 4px; padding: 1px 6px;
  }
  @media (max-width: 860px) {
    .tkv-law-category{ padding: 0 12px; }
  }