/*
 * 教材本文の共通表示レイヤー v2
 * 共通の色・枠・角丸は design-tokens.css、教材固有の幅・余白は
 * この先頭の変数で調整する。
 * AIクローンの .article-body と、起業ワークブックの
 * iframe 内 .article-content へ body のテーマクラス経由で適用する。
 */
body.is-shared-lesson-theme {
  --lesson-page: var(--design-page, #fff9f0);
  --lesson-surface: var(--design-surface, #fff);
  --lesson-surface-alt: var(--design-surface-alt, #fffcf7);
  --lesson-hero: var(--design-hero, #f4d466);
  --lesson-highlight: var(--design-highlight, #fff2bd);
  --lesson-warning: #fff5e8;
  --lesson-ink: var(--design-ink, #172033);
  --lesson-body: var(--design-body, #2d3b50);
  --lesson-muted: var(--design-muted, #53647a);
  --lesson-blue: var(--design-action, #203f76);
  --lesson-blue-soft: var(--design-action-soft, #eef3f9);
  --lesson-blue-line: #b8c6d9;
  --lesson-green: var(--design-positive, #2f6658);
  --lesson-green-soft: var(--design-positive-soft, #eef7f2);
  --lesson-green-line: #c4d9cd;
  --lesson-danger: #a13d3d;
  --lesson-danger-ink: #7d2b2b;
  --lesson-danger-soft: #f7dcdc;
  --lesson-danger-line: #dda9a9;
  --lesson-line: var(--design-line, #172033);
  --lesson-soft-line: var(--design-soft-line, #d3dce8);
  --lesson-code: #17243a;
  --lesson-code-head: #263b58;
  --lesson-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --lesson-content-width: 920px;
  --lesson-section-gap: 28px;
  --lesson-section-padding: clamp(26px, 4vw, 38px);
  --lesson-border-width: 2px;
  --lesson-radius: var(--design-radius, 10px);
  --lesson-radius-large: var(--design-radius-large, 12px);
}

/* コース外の記事は従来の共通本文レイヤーを維持する */
body:not(.is-shared-lesson-theme) .article-body,
body:not(.is-shared-lesson-theme) .article-content {
  --lesson-surface: var(--design-surface, #fff);
  --lesson-warning: var(--design-highlight, #fff2bd);
  --lesson-ink: #24364f;
  --lesson-body: #24364f;
  --lesson-muted: #53647a;
  --lesson-blue: #285bb5;
  --lesson-blue-soft: #eef4fb;
  --lesson-blue-line: #cbd9ed;
  --lesson-green: #237454;
  --lesson-green-soft: #edf7f1;
  --lesson-green-line: #c8e2d2;
  --lesson-danger: #a13d3d;
  --lesson-danger-ink: #7d2b2b;
  --lesson-danger-soft: #f7dcdc;
  --lesson-danger-line: #dda9a9;
  --lesson-soft-line: var(--design-soft-line, #d3dce8);
  --lesson-border-width: 1px;
  --lesson-font: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #fff;
}

/*
 * 本文の文字サイズは A−/A＋ ステッパー（course.js / article.js）が
 * documentElement へ設定する --lesson-font-size に追従する。
 * 段階: 14 / 15 / 16(標準) / 18 / 20 px。行間はunitlessのまま維持。
 */
.article-body,
.article-content {
  color: var(--lesson-body);
  background: transparent;
  font-family: var(--lesson-font);
  font-size: var(--lesson-font-size, 16px);
  line-height: 1.8;
}

.article-content.fs-small,
.article-content.fs-medium,
.article-content.fs-large {
  zoom: 1 !important;
}

.article-body :where(h1, h2, h3, h4, p, li, blockquote, button, input, textarea),
.article-content :where(h1, h2, h3, h4, p, li, blockquote, button, input, textarea) {
  font-family: var(--lesson-font) !important;
}

.article-body h1,
.article-content h1 {
  margin: 0 0 0.72em !important;
  color: var(--lesson-ink) !important;
  font-size: 36px !important;
  font-weight: 750 !important;
  line-height: 1.35 !important;
  letter-spacing: 0 !important;
}

/* AI教材は本文内の重複H1を隠し、画面上部に教材タイトルを表示する */
.article-page .article-hero h1 {
  color: var(--lesson-ink, #24364f) !important;
  font-size: 36px !important;
  line-height: 1.35 !important;
  letter-spacing: 0 !important;
}

.article-body h2,
.article-content h2 {
  margin: 2em 0 0.65em !important;
  padding-bottom: 0.38em;
  color: var(--lesson-ink) !important;
  border-bottom: 1px solid var(--lesson-blue-line);
  font-size: 28px !important;
  font-weight: 720 !important;
  line-height: 1.45 !important;
  letter-spacing: 0 !important;
}

.article-body h3,
.article-content h3 {
  margin: 1.7em 0 0.55em !important;
  color: var(--lesson-ink) !important;
  font-size: 21px !important;
  font-weight: 700 !important;
  line-height: 1.5 !important;
  letter-spacing: 0 !important;
}

.article-body h4,
.article-content h4 {
  color: var(--lesson-ink) !important;
  font-size: 18px !important;
  line-height: 1.55 !important;
}

.article-body p,
.article-body li,
.article-content p,
.article-content li {
  color: var(--lesson-muted) !important;
  font-size: var(--lesson-font-size, 16px) !important;
  line-height: 1.8 !important;
}

/* 表セル・引用も本文系としてステッパーに追従させる（見出し・UI・コードは対象外） */
.article-body :is(td, blockquote),
.article-content :is(td, blockquote) {
  font-size: var(--lesson-font-size, 16px) !important;
}

.article-body p,
.article-content p {
  margin: 0 0 1em;
}

.article-body a,
.article-content a {
  color: var(--lesson-blue);
}

/* 講師吹き出し：旧・新の2形式を同じ仕様にする */
.article-body :is(.part-comment, .suzaki-bubble),
.article-content :is(.part-comment, .suzaki-bubble) {
  display: flex !important;
  flex-direction: row-reverse !important;
  align-items: flex-start !important;
  gap: 14px !important;
  margin: 24px 0 !important;
}

.article-body .part-comment-avatar,
.article-content .part-comment-avatar {
  display: flex;
  flex: 0 0 52px;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.article-body :is(.part-comment-avatar img, .suzaki-bubble-icon),
.article-content :is(.part-comment-avatar img, .suzaki-bubble-icon) {
  width: 52px !important;
  height: 52px !important;
  margin: 0 !important;
  flex: 0 0 52px !important;
  object-fit: cover;
  background: #fff;
  border: var(--lesson-border-width) solid var(--lesson-blue-line) !important;
  border-radius: 50% !important;
}

.article-body :is(.part-comment-name, .suzaki-bubble-name),
.article-content :is(.part-comment-name, .suzaki-bubble-name) {
  display: block;
  margin: 0 0 4px !important;
  color: var(--lesson-muted) !important;
  font-family: var(--lesson-font) !important;
  font-size: 12px !important;
  font-weight: 700 !important;
  line-height: 1.4 !important;
  letter-spacing: 0 !important;
}

.article-body .part-comment-name,
.article-content .part-comment-name {
  margin: 0 !important;
  text-align: center;
}

.article-body :is(.part-comment-bubble, .suzaki-bubble-body),
.article-content :is(.part-comment-bubble, .suzaki-bubble-body) {
  position: relative;
  min-width: 0;
  padding: 18px 20px !important;
  flex: 1;
  color: var(--lesson-ink) !important;
  background: var(--lesson-blue-soft) !important;
  background-image: none !important;
  border: 1px solid var(--lesson-blue-line) !important;
  border-radius: 12px !important;
  box-shadow: none !important;
  font-family: var(--lesson-font) !important;
  font-size: var(--lesson-font-size, 16px) !important;
  line-height: 1.8 !important;
}

.article-body :is(.part-comment-bubble, .suzaki-bubble-body)::before,
.article-content :is(.part-comment-bubble, .suzaki-bubble-body)::before {
  content: "" !important;
  position: absolute !important;
  top: 18px !important;
  right: -8px !important;
  left: auto !important;
  width: 0 !important;
  height: 0 !important;
  border-width: 8px 0 8px 8px !important;
  border-style: solid !important;
  border-color: transparent transparent transparent var(--lesson-blue-line) !important;
}

.article-body :is(.part-comment-bubble, .suzaki-bubble-body)::after,
.article-content :is(.part-comment-bubble, .suzaki-bubble-body)::after {
  content: "" !important;
  position: absolute !important;
  top: 19px !important;
  right: -6px !important;
  width: 0 !important;
  height: 0 !important;
  border-width: 7px 0 7px 7px !important;
  border-style: solid !important;
  border-color: transparent transparent transparent var(--lesson-blue-soft) !important;
}

.article-body .suzaki-bubble-body p,
.article-content .suzaki-bubble-body p {
  margin: 0 !important;
  color: var(--lesson-ink) !important;
  font-size: var(--lesson-font-size, 16px) !important;
  line-height: 1.8 !important;
}

.article-body .suzaki-bubble-body p + p,
.article-content .suzaki-bubble-body p + p {
  margin-top: 8px !important;
}

/* FAQ */
.article-body .faq-list,
.article-content .faq-list {
  display: grid;
  gap: 10px;
  margin: 28px 0 !important;
}

.article-body .faq-item,
.article-content .faq-item {
  overflow: hidden;
  margin: 0 !important;
  background: #fff !important;
  background-image: none !important;
  border: 1px solid var(--lesson-blue-line) !important;
  border-radius: 12px !important;
  box-shadow: none !important;
}

.article-body .faq-question,
.article-content .faq-question {
  display: flex;
  width: 100%;
  min-height: 54px;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px 20px !important;
  color: var(--lesson-ink) !important;
  background: #fff !important;
  background-image: none !important;
  border: 0 !important;
  font-size: 17px !important;
  font-weight: 700 !important;
  line-height: 1.6 !important;
  text-align: left;
}

.article-body .faq-question:hover,
.article-body .faq-question[aria-expanded="true"],
.article-content .faq-question:hover,
.article-content .faq-question[aria-expanded="true"] {
  background: var(--lesson-blue-soft) !important;
}

.article-body .faq-q-label,
.article-content .faq-q-label {
  margin-right: 8px;
  color: var(--lesson-blue) !important;
  font-size: 14px !important;
}

.article-body .faq-toggle,
.article-content .faq-toggle {
  width: 28px;
  height: 28px;
  flex: 0 0 28px;
  background: var(--lesson-blue-soft) !important;
  border-radius: 50%;
}

.article-body .faq-answer,
.article-content .faq-answer {
  padding: 0 !important;
  background: #fff !important;
}

.article-body .faq-answer-inner,
.article-content .faq-answer-inner {
  padding: 16px 20px 20px !important;
  border: 0 !important;
  box-shadow: inset 0 1px var(--lesson-blue-line);
}

.article-body .faq-answer-inner p,
.article-content .faq-answer-inner p {
  margin: 0 0 0.8em !important;
  color: var(--lesson-muted) !important;
  font-size: var(--lesson-font-size, 16px) !important;
  line-height: 1.8 !important;
}

.article-body .faq-answer-inner p:last-child,
.article-content .faq-answer-inner p:last-child {
  margin-bottom: 0 !important;
}

/* プロンプト・コード */
.article-body .code-block,
.article-content .code-block {
  max-width: 100%;
  overflow: hidden;
  margin: 20px 0 28px !important;
  background: #17243a !important;
  background-image: none !important;
  border: 1px solid #2f4665 !important;
  border-radius: 12px !important;
  box-shadow: none !important;
}

.article-body .code-block-header,
.article-content .code-block-header {
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px 10px 18px !important;
  color: #fff !important;
  background: #263b58 !important;
  background-image: none !important;
  border: 0 !important;
}

.article-body .code-block-label,
.article-content .code-block-label {
  color: #fff !important;
  font-family: var(--lesson-font) !important;
  font-size: 13px !important;
  font-weight: 650 !important;
  line-height: 1.5 !important;
  letter-spacing: 0 !important;
}

.article-body .copy-btn,
.article-content .copy-btn {
  min-height: 34px;
  padding: 5px 11px !important;
  color: #fff !important;
  background: #36577e !important;
  background-image: none !important;
  border: 1px solid #7890ad !important;
  border-radius: 7px !important;
  box-shadow: none !important;
  font-size: 13px !important;
  font-weight: 700 !important;
}

.article-body pre,
.article-content pre,
.article-body .code-block pre,
.article-content .code-block pre {
  max-width: 100%;
  overflow-x: auto;
  margin: 0 !important;
  padding: 18px 20px !important;
  color: #f4f7fb !important;
  background: #17243a !important;
  background-image: none !important;
  border: 0 !important;
  border-radius: 12px !important;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace !important;
  font-size: 16px !important;
  line-height: 1.75 !important;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.article-body .code-block pre,
.article-content .code-block pre {
  border-radius: 0 0 12px 12px !important;
}

.article-body pre code,
.article-content pre code,
.article-body .code-block pre code,
.article-content .code-block pre code {
  padding: 0 !important;
  color: inherit !important;
  background: transparent !important;
  font-family: inherit !important;
  font-size: inherit !important;
  line-height: inherit !important;
}

.article-body :not(pre) > code,
.article-content :not(pre) > code {
  padding: 0.12em 0.36em;
  color: var(--lesson-ink);
  background: var(--lesson-blue-soft);
  border-radius: 5px;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.9em;
}

/* Notion風の共通ボックス */
.article-body :is(.callout, .takeaway-box, .ai-response-box, .pull-quote, blockquote),
.article-content :is(.callout, .takeaway-box, .ai-response-box, .pull-quote, blockquote) {
  border-radius: 12px !important;
  box-shadow: none !important;
  background-image: none !important;
}

.article-body .callout,
.article-content .callout {
  display: block !important;
  min-width: 0;
  align-items: start !important;
  gap: 4px 12px !important;
  margin: 24px 0 !important;
  padding: 18px 20px !important;
  color: var(--lesson-ink) !important;
  background: var(--lesson-blue-soft) !important;
  border: 1px solid var(--lesson-blue-line) !important;
  opacity: 1 !important;
  transform: none !important;
}

/* 本文構造が確定した callout だけをアイコン付き2列にする */
.article-body .callout:has(> .callout-icon):has(> .callout-body),
.article-content .callout:has(> .callout-icon):has(> .callout-body),
.article-body .callout:has(> .call-icon):has(> .call-body),
.article-content .callout:has(> .call-icon):has(> .call-body) {
  display: grid !important;
  grid-template-columns: 36px minmax(0, 1fr) !important;
}

.article-body .callout-icon,
.article-content .callout-icon,
.article-body .call-icon,
.article-content .call-icon {
  position: static !important;
  display: inline-flex;
  width: 36px;
  height: 36px;
  grid-column: 1;
  grid-row: 1 / span 10;
  align-items: center;
  justify-content: center;
  color: var(--lesson-blue) !important;
  background: #fff !important;
  border-radius: 9px !important;
  font-size: 19px !important;
}

.article-body .callout:has(> .callout-icon):has(> .callout-body) > .callout-body,
.article-content .callout:has(> .callout-icon):has(> .callout-body) > .callout-body,
.article-body .callout:has(> .call-icon):has(> .call-body) > .call-body,
.article-content .callout:has(> .call-icon):has(> .call-body) > .call-body {
  min-width: 0;
  grid-column: 2;
}

.article-body .callout:has(> .callout-icon):has(> .callout-body) > .callout-icon,
.article-content .callout:has(> .callout-icon):has(> .callout-body) > .callout-icon,
.article-body .callout:has(> .call-icon):has(> .call-body) > .call-icon,
.article-content .callout:has(> .call-icon):has(> .call-body) > .call-icon {
  grid-column: 1;
}

.article-body .callout-title,
.article-content .callout-title,
.article-body .call-title,
.article-content .call-title {
  margin: 0 0 4px !important;
  color: var(--lesson-ink) !important;
  font-size: 17px !important;
  font-weight: 750 !important;
  line-height: 1.6 !important;
}

.article-body .callout :is(p, li),
.article-content .callout :is(p, li) {
  color: var(--lesson-muted) !important;
  font-size: var(--lesson-font-size, 16px) !important;
  line-height: 1.8 !important;
}

.article-body .takeaway-box,
.article-content .takeaway-box {
  position: relative;
  overflow: hidden;
  margin: 28px 0 !important;
  padding: 20px !important;
  background: var(--lesson-green-soft) !important;
  border: 1px solid var(--lesson-green-line) !important;
}

.article-body .takeaway-box::before,
.article-body .takeaway-box::after,
.article-content .takeaway-box::before,
.article-content .takeaway-box::after {
  content: none !important;
}

.article-body .takeaway-header,
.article-content .takeaway-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px !important;
}

.article-body .takeaway-header h3,
.article-content .takeaway-header h3 {
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  font-size: 21px !important;
}

.article-body .takeaway-list,
.article-content .takeaway-list {
  display: grid;
  gap: 8px;
  margin: 0 !important;
  padding: 0 !important;
  list-style: none;
}

/* 旧教材には本文をspanで包まずテキスト直書きした li がある。
   その状態で2列化すると裸テキストがアイコン列（24px）へ入り
   1文字ずつ縦に折れるため、アイコン + 本文要素の組が揃った時だけ2列にする
   （callout・tl-step と同じ防御方式。2026-07-29の表示崩れ事故の恒久対策） */
.article-body .takeaway-list li,
.article-content .takeaway-list li {
  display: block !important;
  padding: 4px 0 !important;
  color: var(--lesson-ink) !important;
  font-size: var(--lesson-font-size, 16px) !important;
  line-height: 1.8 !important;
}

.article-body .takeaway-list li:has(> .takeaway-check):has(> *:not(.takeaway-check)),
.article-content .takeaway-list li:has(> .takeaway-check):has(> *:not(.takeaway-check)) {
  display: grid !important;
  grid-template-columns: 24px minmax(0, 1fr);
  align-items: start;
  gap: 9px;
}

.article-body .takeaway-list li > .takeaway-check,
.article-content .takeaway-list li > .takeaway-check {
  grid-column: 1;
}

.article-body .takeaway-list li > *:not(.takeaway-check),
.article-content .takeaway-list li > *:not(.takeaway-check) {
  grid-column: 2;
  min-width: 0;
}

.article-body .takeaway-check,
.article-content .takeaway-check {
  display: inline-flex;
  width: 22px !important;
  height: 22px !important;
  margin-top: 4px !important;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: var(--lesson-green) !important;
  border-radius: 50%;
}

.article-body .ai-response-box,
.article-content .ai-response-box {
  margin: 24px 0 !important;
  padding: 18px 20px !important;
  background: var(--lesson-blue-soft) !important;
  border: 1px solid var(--lesson-blue-line) !important;
}

.article-body .ai-response-label,
.article-content .ai-response-label {
  display: inline-block;
  margin: 0 0 10px !important;
  padding: 3px 9px !important;
  color: var(--lesson-blue) !important;
  background: #fff !important;
  border-radius: 7px !important;
  font-size: 12px !important;
  font-weight: 750 !important;
  line-height: 1.5 !important;
}

.article-body .ai-response-box :is(p, li),
.article-content .ai-response-box :is(p, li) {
  color: var(--lesson-ink) !important;
  font-size: var(--lesson-font-size, 16px) !important;
  line-height: 1.8 !important;
}

.article-body :is(.pull-quote, blockquote),
.article-content :is(.pull-quote, blockquote) {
  position: relative;
  margin: 26px 0 !important;
  padding: 18px 20px !important;
  color: var(--lesson-ink) !important;
  background: var(--lesson-blue-soft) !important;
  border: 1px solid var(--lesson-blue-line) !important;
}

.article-body .pull-quote::before,
.article-content .pull-quote::before {
  content: none !important;
}

.article-body :is(.pull-quote, blockquote) p,
.article-content :is(.pull-quote, blockquote) p {
  margin: 0 !important;
  color: var(--lesson-ink) !important;
  font-size: var(--lesson-font-size, 16px) !important;
  font-weight: 650 !important;
  line-height: 1.8 !important;
  letter-spacing: 0 !important;
}

/* AIクローン教材の実践ボックスも同じ基準に揃える */
.article-body :is(.lesson-callout, .lesson-worksheet, .lesson-checklist, .lesson-next) {
  margin: 24px 0 !important;
  padding: 18px 20px !important;
  color: var(--lesson-ink) !important;
  background: var(--lesson-blue-soft) !important;
  border: 1px solid var(--lesson-blue-line) !important;
  border-radius: 12px !important;
  box-shadow: none !important;
}

.article-body :is(.lesson-callout--safe, .lesson-callout--success, .lesson-worksheet, .lesson-checklist) {
  background: var(--lesson-green-soft) !important;
  border-color: var(--lesson-green-line) !important;
}

.article-body .lesson-callout--warning {
  color: var(--lesson-ink) !important;
  background: var(--lesson-blue-soft) !important;
  border-color: var(--lesson-blue-line) !important;
}

.article-body :is(.lesson-callout, .lesson-worksheet, .lesson-checklist, .lesson-next) :is(p, li, dd) {
  font-size: var(--lesson-font-size, 16px) !important;
  line-height: 1.8 !important;
}

.article-body .lesson-card,
.article-body .lesson-steps > li {
  background: #f6f8fb !important;
  border: 1px solid #e2e8f0 !important;
  border-radius: 12px !important;
  box-shadow: none !important;
}

.article-body .lesson-card {
  padding: 18px 20px !important;
}

.article-body .lesson-steps > li {
  padding: 16px 18px 16px 58px !important;
}

.article-body :is(.lesson-card, .lesson-steps > li, .lesson-next) h3,
.article-content :is(.completion-box, .ai-response-box, .takeaway-box, .callout) h3 {
  margin: 0 0 4px !important;
  padding: 0 !important;
  border: 0 !important;
  font-size: 21px !important;
  line-height: 1.55 !important;
}

.article-body .lesson-checklist {
  display: grid;
  gap: 8px;
  list-style: none;
}

.article-body .lesson-checklist li {
  margin: 0 !important;
}

.article-body .pq-author,
.article-content .pq-author {
  display: block;
  margin-top: 8px !important;
  color: var(--lesson-muted) !important;
  font-size: 12px !important;
  line-height: 1.5 !important;
}

/* 3列カードは作らず、読み順が明確な縦1列にする */
.article-body :is(.lesson-stack, .feature-grid, .reason-grid, .mindset-grid, .db-outcome-grid),
.article-content :is(.lesson-stack, .feature-grid, .reason-grid, .mindset-grid, .db-outcome-grid) {
  grid-template-columns: minmax(0, 1fr) !important;
}

@media (max-width: 640px) {
  .article-body,
  .article-content {
    overflow-wrap: anywhere;
  }

  .article-body :is(.part-comment, .suzaki-bubble),
  .article-content :is(.part-comment, .suzaki-bubble) {
    gap: 10px !important;
  }

  .article-body :is(.part-comment-bubble, .suzaki-bubble-body),
  .article-content :is(.part-comment-bubble, .suzaki-bubble-body) {
    padding: 16px 17px !important;
  }

  .article-body .faq-question,
  .article-content .faq-question,
  .article-body .faq-answer-inner,
  .article-content .faq-answer-inner {
    padding-right: 16px !important;
    padding-left: 16px !important;
  }
}

@scope (body.is-shared-lesson-theme) {
/* 承認済み教材テーマ：ページ、ヒーロー、章カード */
:scope,
.course-lesson-pane,
.startup-viewer {
  color: var(--lesson-body) !important;
  background: var(--lesson-page) !important;
  background-image: none !important;
}

.course-lesson-pane,
.article-frame,
.article-body,
.article-content,
.product-course-panel,
.startup-viewer,
.course-lesson-pane :where(*, *::before, *::after),
.article-frame :where(*, *::before, *::after),
.article-body :where(*, *::before, *::after),
.article-content :where(*, *::before, *::after),
.product-course-panel :where(*, *::before, *::after),
.startup-viewer :where(*, *::before, *::after) {
  box-shadow: none !important;
  text-shadow: none !important;
}

.course-lesson-inner,
.article-content,
.article-content.fs-medium {
  width: min(100%, var(--lesson-content-width)) !important;
}

.course-context,
.product-course-panel {
  color: var(--lesson-ink) !important;
  background: var(--lesson-surface) !important;
  background-image: none !important;
  border: var(--lesson-border-width) solid var(--lesson-line) !important;
  border-radius: var(--lesson-radius) !important;
}

.course-context h2 {
  color: var(--lesson-ink) !important;
}

.course-context :is(.course-context__top, .course-context__progress span) {
  color: var(--lesson-body) !important;
}

.product-lesson-preview.has-source-content {
  background: transparent !important;
  border: 0 !important;
  border-radius: 0 !important;
}

.article-frame {
  overflow: visible !important;
  background: transparent !important;
  border: 0 !important;
  border-radius: 0 !important;
}

.article-hero {
  position: relative;
  margin-bottom: var(--lesson-section-gap) !important;
  padding: 36px 38px 38px !important;
  color: var(--lesson-ink) !important;
  background: var(--lesson-hero) !important;
  background-image: none !important;
  border: 3px solid var(--lesson-line) !important;
  border-radius: var(--lesson-radius-large) !important;
}

.article-hero h1,
.article-content .article-hero h1 {
  max-width: 760px;
  margin: 0 !important;
  color: var(--lesson-ink) !important;
  font-family: var(--lesson-font) !important;
  font-size: clamp(2.2rem, 4vw, 3.35rem) !important;
  font-weight: 850 !important;
  line-height: 1.22 !important;
  letter-spacing: 0 !important;
}

.product-course-hero h1,
.article-content .product-course-hero h1 {
  max-width: 900px;
  font-size: clamp(2.2rem, 3.35vw, 3rem) !important;
  text-wrap: balance;
}

.article-hero :is(p, .article-summary, .article-hero__summary) {
  max-width: 720px;
  margin-bottom: 0 !important;
  color: var(--lesson-body) !important;
  font-size: 17px !important;
  font-weight: 650 !important;
  line-height: 1.75 !important;
}

.article-content .article-cat-badge,
.product-course-hero .eyebrow {
  display: inline-flex;
  margin: 0 0 14px !important;
  padding: 5px 10px !important;
  color: #fff !important;
  background: var(--lesson-blue) !important;
  border: 0 !important;
  border-radius: 999px !important;
  font-family: var(--lesson-font) !important;
  font-size: 12px !important;
  font-weight: 800 !important;
  letter-spacing: 0.06em !important;
}

.article-content .article-hero-line {
  display: none !important;
}

.article-body,
.article-content {
  counter-reset: lesson-section;
  color: var(--lesson-body) !important;
  background: transparent !important;
}

.article-body > .lesson-article__header {
  margin: 0 0 var(--lesson-section-gap) !important;
  padding: 36px 38px 38px !important;
  background: var(--lesson-hero) !important;
  background-image: none !important;
  border: 3px solid var(--lesson-line) !important;
  border-radius: var(--lesson-radius-large) !important;
}

.article-body > .lesson-article__header h1 {
  margin: 0 !important;
  color: var(--lesson-ink) !important;
  font-family: var(--lesson-font) !important;
  font-size: clamp(2.2rem, 4vw, 3.35rem) !important;
  font-weight: 850 !important;
  line-height: 1.22 !important;
  letter-spacing: 0 !important;
}

.article-body > section,
.article-content > section {
  margin: 0 0 var(--lesson-section-gap) !important;
  padding: var(--lesson-section-padding) !important;
  color: var(--lesson-body) !important;
  background: var(--lesson-surface) !important;
  background-image: none !important;
  border: var(--lesson-border-width) solid var(--lesson-line) !important;
  border-radius: var(--lesson-radius) !important;
}

.article-body > .lesson-section--alt,
.article-content > .lesson-section--alt {
  background: var(--lesson-surface-alt) !important;
}

/* counter は見出し自体で進め、動画など見出しのない section では進めない */
.article-body > section > h2:first-child,
.article-content > section > h2:first-child {
  counter-increment: lesson-section;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  align-items: center;
  gap: 13px;
  margin: 0 0 24px !important;
  padding: 0 0 18px !important;
  color: var(--lesson-ink) !important;
  border: 0 !important;
  border-bottom: var(--lesson-border-width) solid var(--lesson-line) !important;
  font-size: clamp(1.35rem, 2.4vw, 1.8rem) !important;
  font-weight: 820 !important;
  line-height: 1.4 !important;
}

.article-body > section > h2:first-child::before,
.article-content > section > h2:first-child::before {
  content: counter(lesson-section, decimal-leading-zero);
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: var(--lesson-blue);
  border-radius: 50%;
  font-size: 13px;
  font-weight: 850;
}

.article-body :is(p, li, dd),
.article-content :is(p, li, dd) {
  color: var(--lesson-body) !important;
  font-weight: 500;
}

.article-body strong,
.article-content strong {
  color: var(--lesson-ink) !important;
  font-weight: 780;
}

/* 旧教材のインライン装飾を安全な共通面へ変換した要素 */
.article-content .lesson-legacy-surface {
  margin: 24px 0 !important;
  padding: 20px 24px !important;
  color: var(--lesson-body) !important;
  background: var(--lesson-surface-alt) !important;
  background-image: none !important;
  border: var(--lesson-border-width) solid var(--lesson-line) !important;
  border-radius: var(--lesson-radius) !important;
}

.article-content .lesson-legacy-surface__title {
  margin-bottom: 10px !important;
  color: var(--lesson-ink) !important;
  font-family: var(--lesson-font) !important;
  font-size: 17px !important;
  font-weight: 800 !important;
  line-height: 1.6 !important;
}

/* 教材内カードは読み順を保つ縦1列。番号ラベルで現在地を示す */
.article-body .lesson-stack,
.article-content :is(.lesson-stack, .feature-grid, .reason-grid, .mindset-grid, .db-outcome-grid) {
  counter-reset: lesson-card;
  display: grid !important;
  grid-template-columns: minmax(0, 1fr) !important;
  gap: 14px !important;
}

.article-body .lesson-card {
  counter-increment: lesson-card;
  position: relative;
  min-height: 0;
  padding: 58px 20px 20px !important;
  background: var(--lesson-blue-soft) !important;
  border: var(--lesson-border-width) solid var(--lesson-blue) !important;
  border-radius: 9px !important;
}

.article-body .lesson-card::before {
  content: counter(lesson-card, decimal-leading-zero);
  position: absolute;
  top: 16px;
  left: 18px;
  padding: 4px 9px;
  color: #fff;
  background: var(--lesson-green) !important;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 850;
}

.article-body .lesson-steps {
  display: grid;
  gap: 13px;
  padding: 0;
}

.article-body .lesson-steps > li {
  min-height: 0;
  margin: 0 !important;
  padding: 18px 20px 18px 66px !important;
  background: var(--lesson-surface) !important;
  border: var(--lesson-border-width) solid var(--lesson-soft-line) !important;
  border-radius: 8px !important;
}

.article-body .lesson-steps > li::before {
  top: 18px !important;
  left: 18px !important;
  width: 30px !important;
  height: 30px !important;
  background: var(--lesson-blue) !important;
}

.article-body :is(.lesson-callout, .lesson-worksheet, .lesson-checklist, .lesson-next) {
  border: var(--lesson-border-width) solid var(--lesson-line) !important;
  border-radius: 9px !important;
}

.article-body .lesson-callout--primary {
  background: var(--lesson-highlight) !important;
}

.article-body .lesson-callout--primary p:first-child strong {
  font-weight: 850 !important;
}

.article-body .lesson-callout--warning {
  background: var(--lesson-warning) !important;
}

.article-body :is(.lesson-callout--safe, .lesson-callout--success, .lesson-worksheet, .lesson-checklist) {
  background: var(--lesson-green-soft) !important;
}

.article-body .lesson-checklist li {
  padding: 7px 0 !important;
  border-bottom: 1px solid var(--lesson-green-line);
}

.article-body .lesson-checklist li:last-child {
  border-bottom: 0;
}

.article-body :is(.callout, .takeaway-box, .ai-response-box, .pull-quote, blockquote),
.article-content :is(.callout, .takeaway-box, .ai-response-box, .pull-quote, blockquote) {
  border-width: var(--lesson-border-width) !important;
  border-color: var(--lesson-line) !important;
}

.article-body .callout,
.article-content .callout,
.article-body :is(.pull-quote, blockquote),
.article-content :is(.pull-quote, blockquote) {
  background: var(--lesson-highlight) !important;
}

.article-body :is(.takeaway-box, .ai-response-box),
.article-content :is(.takeaway-box, .ai-response-box) {
  background: var(--lesson-green-soft) !important;
}

.article-body :is(.part-comment-bubble, .suzaki-bubble-body),
.article-content :is(.part-comment-bubble, .suzaki-bubble-body),
.article-body .faq-item,
.article-content .faq-item {
  border-color: var(--lesson-line) !important;
  border-width: var(--lesson-border-width) !important;
}

.article-body .faq-answer-inner,
.article-content .faq-answer-inner {
  box-shadow: none !important;
}

.article-body .code-block,
.article-content .code-block {
  background: var(--lesson-code) !important;
  border-color: var(--lesson-line) !important;
  border-width: var(--lesson-border-width) !important;
}

.article-body .code-block-header,
.article-content .code-block-header {
  background: var(--lesson-code-head) !important;
}

.article-body pre,
.article-content pre,
.article-body .code-block pre,
.article-content .code-block pre {
  background: var(--lesson-code) !important;
}

.startup-video {
  background: var(--lesson-code) !important;
  border: var(--lesson-border-width) solid var(--lesson-line) !important;
  border-radius: var(--lesson-radius) !important;
}

.startup-lesson-viewer {
  background: var(--lesson-page) !important;
  border: 0 !important;
}

.article-navigation.is-course-navigation {
  box-shadow: none !important;
}
}

/*
 * 旧教材HTMLとの互換レイヤー。
 * 構造が不確かな要素は縦配置を既定にし、JS正規化後の明示的な
 * icon + body / dot + body の組だけを2列化する。
 */
.article-body :is(.feature-card, .feat-card, .reason-card, .mindset-card),
.article-content :is(.feature-card, .feat-card, .reason-card, .mindset-card) {
  display: block !important;
  min-width: 0;
  margin: 1.2rem 0 !important;
  padding: 17px 18px !important;
  background: var(--lesson-blue-soft) !important;
  border: var(--lesson-border-width) solid var(--lesson-blue-line) !important;
  border-radius: 8px !important;
  box-shadow: none !important;
}

.article-body .feature-card:has(> .feat-body),
.article-content .feature-card:has(> .feat-body) {
  display: flex !important;
  align-items: flex-start;
  gap: 13px;
}

.article-body :is(.feature-grid, .feat-grid, .feature-cards, .feature-cards-grid),
.article-content :is(.feature-grid, .feat-grid, .feature-cards, .feature-cards-grid) {
  display: grid !important;
  grid-template-columns: minmax(0, 1fr) !important;
  gap: 14px !important;
}

.article-body :is(.feat-body, .callout-body, .call-body, .tl-content, .tl-body, .step-content),
.article-content :is(.feat-body, .callout-body, .call-body, .tl-content, .tl-body, .step-content) {
  min-width: 0;
}

.article-body :is(.feat-icon, .feature-icon, .feature-card-icon, .feat-card-icon, .feat-emoji, .reason-icon, .mindset-num),
.article-content :is(.feat-icon, .feature-icon, .feature-card-icon, .feat-card-icon, .feat-emoji, .reason-icon, .mindset-num) {
  display: inline-flex;
  min-width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  color: var(--lesson-blue) !important;
  background: var(--lesson-surface) !important;
  border-radius: 7px !important;
}

.article-body :is(.feat-title, .feature-card-title, .call-title),
.article-content :is(.feat-title, .feature-card-title, .call-title) {
  color: var(--lesson-ink) !important;
  font-weight: 800 !important;
}

.article-body :is(.feat-desc, .feature-card-desc),
.article-content :is(.feat-desc, .feature-card-desc) {
  color: var(--lesson-muted) !important;
}

.article-body .reason-num,
.article-content .reason-num {
  margin: 8px 0 3px;
  color: var(--lesson-blue) !important;
  font-size: 13px;
  font-weight: 800;
}

.article-body .check-icon,
.article-content .check-icon {
  display: inline-flex;
  width: 22px;
  height: 22px;
  align-items: center;
  justify-content: center;
  color: var(--lesson-surface) !important;
  background: var(--lesson-green) !important;
  border-radius: 50% !important;
  font-size: 13px;
  font-weight: 850;
}

.article-body .tl-step,
.article-content .tl-step {
  display: block !important;
  min-width: 0;
}

.article-body .tl-step:has(> :is(.tl-dot, .step-num)):has(> :is(.tl-content, .tl-body, .step-content)),
.article-content .tl-step:has(> :is(.tl-dot, .step-num)):has(> :is(.tl-content, .tl-body, .step-content)) {
  display: grid !important;
  grid-template-columns: 30px minmax(0, 1fr) !important;
  align-items: start !important;
  gap: 11px !important;
}

.article-body .tl-step:has(> :is(.tl-dot, .step-num)):has(> :is(.tl-content, .tl-body, .step-content)) > :is(.tl-dot, .step-num),
.article-content .tl-step:has(> :is(.tl-dot, .step-num)):has(> :is(.tl-content, .tl-body, .step-content)) > :is(.tl-dot, .step-num) {
  grid-column: 1;
}

.article-body .tl-step:has(> :is(.tl-dot, .step-num)):has(> :is(.tl-content, .tl-body, .step-content)) > :is(.tl-content, .tl-body, .step-content),
.article-content .tl-step:has(> :is(.tl-dot, .step-num)):has(> :is(.tl-content, .tl-body, .step-content)) > :is(.tl-content, .tl-body, .step-content) {
  min-width: 0;
  grid-column: 2;
}

/* 共有テーマ内の既定背景より後で、旧classを含む意味色を確定する */
.article-body .callout:is(.warning, .danger, .warn, .callout-warn, .callout-yellow),
.article-content .callout:is(.warning, .danger, .warn, .callout-warn, .callout-yellow) {
  background: var(--lesson-warning) !important;
  border-color: var(--lesson-soft-line) !important;
}

.article-body .callout:is(.success, .tip, .callout-tip, .callout-green),
.article-content .callout:is(.success, .tip, .callout-tip, .callout-green) {
  background: var(--lesson-green-soft) !important;
  border-color: var(--lesson-green-line) !important;
}

.article-body .callout:is(.info, .callout-blue, .callout-info),
.article-content .callout:is(.info, .callout-blue, .callout-info) {
  background: var(--lesson-blue-soft) !important;
  border-color: var(--lesson-blue-line) !important;
}

/* v10: 教材の注意書きを重み別に色分けする（2026-08-26）。
   禁止・警告は赤面、確認チェックは青面、補足は既定の黄色のまま据え置く。
   既定の .callout 定義は触らず、修飾子クラスだけに色を当てる（既存記事への波及を防ぐ）。
   背景色・文字色・アイコン色だけで区別し、左の縦線や上部カラーバーは使わない（全辺角丸）。
   色が見えない場合でも種類が分かるよう、タイトル前に「禁止」「確認」のラベル語を出す。 */
.article-body .callout.callout--danger,
.article-content .callout.callout--danger {
  /* 2026-08-26 濃度調整: #fbefef では他の面と見分けがつかず読み飛ばされるため、
     背景をもう一段濃くする（会員から「薄い色は読み飛ばしてしまう」との指摘） */
  background: var(--lesson-danger-soft, #f7dcdc) !important;
  border-color: var(--lesson-danger-line, #dda9a9) !important;
}

/* アイコンは白抜きの赤丸にして、色が薄い環境でも重みが出るようにする */
.article-body .callout.callout--danger .callout-icon,
.article-content .callout.callout--danger .callout-icon {
  color: #fff !important;
  background: var(--lesson-danger, #a13d3d) !important;
  font-weight: 800 !important;
}

.article-body .callout.callout--danger .callout-title,
.article-content .callout.callout--danger .callout-title {
  color: var(--lesson-danger-ink, #7d2b2b) !important;
  font-weight: 800 !important;
}

.article-body .callout.callout--check,
.article-content .callout.callout--check {
  background: var(--lesson-blue-soft) !important;
  border-color: var(--lesson-blue-line) !important;
}

.article-body .callout.callout--check .callout-title,
.article-content .callout.callout--check .callout-title {
  color: var(--lesson-blue, #203f76) !important;
}

/* 種類を示すラベル語。色覚特性で色が判別できなくても文字で読み取れるようにする */
.article-body .callout:is(.callout--danger, .callout--check) .callout-title::before,
.article-content .callout:is(.callout--danger, .callout--check) .callout-title::before {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 8px;
  border-radius: 999px;
  background: #fff;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.7;
  vertical-align: 2px;
}

.article-body .callout.callout--danger .callout-title::before,
.article-content .callout.callout--danger .callout-title::before {
  content: "禁止・警告";
  color: var(--lesson-danger, #a13d3d);
}

.article-body .callout.callout--check .callout-title::before,
.article-content .callout.callout--check .callout-title::before {
  content: "確認";
  color: var(--lesson-blue, #203f76);
}

/* ===== v8: 教材ヒーロー画像 ===== */
.lesson-article .lesson-hero-figure {
  margin: 20px 0 8px;
}

.lesson-article .lesson-hero-img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius-large);
}

/* ===== v9: 教材内ライブ図解（画像ではなくHTML/CSSで描く） ===== */
.article-body .lesson-diagram,
.article-content .lesson-diagram {
  margin: 20px 0;
  padding: 20px;
  background: var(--design-surface-alt);
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius-large);
}

.article-body .lesson-diagram__title,
.article-content .lesson-diagram__title {
  margin: 0 0 14px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--design-muted);
  letter-spacing: 0.04em;
}

/* 3要素の構造図（縦積み・矢印つき） */
.article-body .diagram-flow,
.article-content .diagram-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.article-body .diagram-node,
.article-content .diagram-node {
  background: var(--design-surface);
  border: 2px solid var(--design-line);
  border-radius: var(--design-radius);
  padding: 12px 16px;
}

.article-body .diagram-node strong,
.article-content .diagram-node strong {
  display: block;
  font-size: 1rem;
  color: var(--design-ink);
  margin-bottom: 2px;
}

.article-body .diagram-node span,
.article-content .diagram-node span {
  display: block;
  font-size: 0.85rem;
  color: var(--design-muted);
  line-height: 1.6;
}

.article-body .diagram-arrow,
.article-content .diagram-arrow {
  align-self: center;
  padding: 6px 0;
  font-size: 1.1rem;
  color: var(--design-action);
  line-height: 1;
}

/* フォルダ階層図（等幅） */
.article-body .diagram-tree,
.article-content .diagram-tree {
  margin: 0;
  padding: 16px;
  background: var(--design-surface);
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  line-height: 1.9;
  color: var(--design-ink);
  overflow-x: auto;
  white-space: pre;
}

.article-body .diagram-tree b,
.article-content .diagram-tree b {
  color: var(--design-action);
  font-weight: 700;
}

.article-body .diagram-tree i,
.article-content .diagram-tree i {
  color: var(--design-muted);
  font-style: normal;
}

/* 対比図（左右2カラム・スマホは縦） */
.article-body .diagram-compare,
.article-content .diagram-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.article-body .diagram-compare > div,
.article-content .diagram-compare > div {
  background: var(--design-surface);
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius);
  padding: 14px 16px;
}

.article-body .diagram-compare h4,
.article-content .diagram-compare h4 {
  margin: 0 0 6px;
  font-size: 0.9rem;
  color: var(--design-ink);
}

.article-body .diagram-compare p,
.article-content .diagram-compare p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--design-muted);
  line-height: 1.7;
}

@media (max-width: 680px) {
  .article-body .diagram-compare,
  .article-content .diagram-compare {
    grid-template-columns: 1fr;
  }
}

/* v13: 記事本文内のダウンロード等ボタンの文字色がリンク色(--lesson-blue)に上書きされ、紺背景で沈む問題の修正（2026-08-11 須崎指摘） */
.article-body a.primary-button,
.article-content a.primary-button,
.article-body a.primary-button:visited,
.article-content a.primary-button:visited,
.article-body a.primary-button:hover,
.article-content a.primary-button:hover {
  color: #fff;
}

/* v14: 「この教材をまるごとコピー」バー（article.jsが本文冒頭に自動挿入。AIに貼って一緒に進めるための全文コピー） */
.article-body .lesson-copy-all,
.article-content .lesson-copy-all {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin: 0 0 28px;
  padding: 14px 18px;
  background: var(--design-action-soft, #eef3f9);
  border-radius: var(--design-radius, 12px);
}

.article-body .lesson-copy-all__btn,
.article-content .lesson-copy-all__btn {
  flex-shrink: 0;
}

.article-body .lesson-copy-all__note,
.article-content .lesson-copy-all__note {
  margin: 0;
  font-size: 0.88em;
  line-height: 1.7;
  color: var(--design-muted, #5a6472);
}

/* Vimeo動画のページ内埋め込み（article.jsのbuildVimeoEmbedが生成。2026-08-11 リンク方式から切替） */
.article-body .lesson-video-embed,
.article-content .lesson-video-embed {
  margin: 24px 0 !important;
  padding: 0 !important;
}

.article-body .lesson-video-embed__frame,
.article-content .lesson-video-embed__frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--lesson-code, #17243a);
  border: var(--lesson-border-width, 1px) solid var(--lesson-line, #e2e8f0);
  border-radius: var(--lesson-radius, 10px);
}

.article-body .lesson-video-embed__frame iframe,
.article-content .lesson-video-embed__frame iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.article-body .lesson-video-embed__open,
.article-content .lesson-video-embed__open {
  margin: 8px 0 0 !important;
  font-size: 0.85em;
  text-align: right;
  color: var(--lesson-muted, #53647a);
}

/* v20: AIクローン本コース各教材のSUZAKI図解
   v21: course.html配下のビューワー（body.online-course-viewer-page）でも同じ図解ルールを適用
        （article-page限定だったため法人案件スタートキットの図解8枚が原寸1200pxではみ出していた） */
body.article-page .article-body .lesson-figure.lesson-figure--suzaki,
body.article-page .article-content .lesson-figure.lesson-figure--suzaki,
body.online-course-viewer-page .article-content .lesson-figure.lesson-figure--suzaki {
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  overflow: hidden;
  margin: 0 0 var(--lesson-section-gap, 28px);
  background: var(--lesson-surface, #fff);
  border: 1px solid var(--lesson-soft-line, #d3dce8);
  border-radius: var(--lesson-radius-large, 12px);
  break-inside: avoid;
  page-break-inside: avoid;
}

body.article-page .article-body .lesson-figure.lesson-figure--suzaki img,
body.article-page .article-content .lesson-figure.lesson-figure--suzaki img,
body.online-course-viewer-page .article-content .lesson-figure.lesson-figure--suzaki img {
  display: block;
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 1672 / 941;
  object-fit: contain;
  background: #fff;
  border: 0;
  border-bottom: 1px solid var(--lesson-soft-line, #d3dce8);
}

body.article-page .article-body .lesson-figure.lesson-figure--suzaki figcaption,
body.article-page .article-content .lesson-figure.lesson-figure--suzaki figcaption,
body.online-course-viewer-page .article-content .lesson-figure.lesson-figure--suzaki figcaption {
  margin: 0;
  padding: 11px 16px 13px;
  color: var(--lesson-muted, #53647a);
  font-size: 0.9rem;
  line-height: 1.7;
  text-align: center;
  overflow-wrap: anywhere;
}

/* v16: 実画面スクショに位置マーカーを重ねる図（2026-08-12 音声入力レッスンで新設） */
.lesson-figure {
  margin: 24px 0;
}

.lesson-figure__marked {
  position: relative;
  display: block;
  width: 100%;
  max-width: 640px;
  border: 1px solid var(--lesson-line, #e3ded7);
  border-radius: var(--lesson-radius, 12px);
  overflow: hidden;
  background: var(--design-surface, #fff);
}

.lesson-figure__marked img {
  display: block;
  width: 100%;
  height: auto;
}

.lesson-figure__zoom-link {
  display: block;
}

/* マイクボタンの位置（画像内の相対座標）。画像を差し替えたらここの % だけ調整する */
.lesson-figure__pin {
  position: absolute;
  left: 36.2%;
  top: 88.5%;
  width: 46px;
  height: 46px;
  margin: -23px 0 0 -23px;
  border: 3px solid var(--design-accent-strong, #c0392b);
  border-radius: 50%;
  pointer-events: none;
}

.lesson-figure__note {
  position: absolute;
  left: 42%;
  top: 88.5%;
  transform: translateY(-50%);
  padding: 4px 10px;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  background: var(--design-accent-strong, #c0392b);
  border-radius: 999px;
  white-space: nowrap;
  pointer-events: none;
}

.lesson-figure figcaption {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--lesson-muted, #6b6357);
}

@media (max-width: 560px) {
  body.article-page .article-body .lesson-figure.lesson-figure--suzaki,
  body.article-page .article-content .lesson-figure.lesson-figure--suzaki,
  body.online-course-viewer-page .article-content .lesson-figure.lesson-figure--suzaki {
    margin-bottom: 20px;
  }

  body.article-page .article-body .lesson-figure.lesson-figure--suzaki figcaption,
  body.article-page .article-content .lesson-figure.lesson-figure--suzaki figcaption,
  body.online-course-viewer-page .article-content .lesson-figure.lesson-figure--suzaki figcaption {
    padding: 9px 12px 10px;
    font-size: 0.82rem;
  }

  .lesson-figure__note { font-size: 0.75rem; padding: 3px 8px; }
  .lesson-figure__pin { width: 34px; height: 34px; margin: -17px 0 0 -17px; border-width: 2px; }
}

/* 教材内の比較表（Notion風・素のtableに全適用） */
.article-body table,
.article-content table {
  width: 100%;
  margin: 20px 0;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.92rem;
  line-height: 1.6;
  background: var(--design-surface);
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius-large);
  overflow: hidden;
}

.article-body table caption,
.article-content table caption {
  caption-side: top;
  text-align: left;
  padding: 0 2px 10px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--design-muted);
  letter-spacing: 0.04em;
}

.article-body table th,
.article-body table td,
.article-content table th,
.article-content table td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--design-soft-line);
}

.article-body table thead th,
.article-content table thead th {
  background: var(--design-surface-alt);
  font-weight: 700;
  color: var(--design-ink);
  font-size: 0.88rem;
  white-space: nowrap;
}

.article-body table tbody th[scope="row"],
.article-content table tbody th[scope="row"] {
  font-weight: 700;
  color: var(--design-ink);
  background: var(--design-surface-alt);
  white-space: nowrap;
}

.article-body table tbody tr:last-child th,
.article-body table tbody tr:last-child td,
.article-content table tbody tr:last-child th,
.article-content table tbody tr:last-child td {
  border-bottom: none;
}

/* ===== v10: AI接続ガイド（mcp-connect-guide）の図解と画面モック ===== */
/* 全体像のSVG。色はデザイントークンに合わせる（外部画像に頼らない） */
.article-body .mcp-flow,
.article-content .mcp-flow {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  font-family: var(--lesson-font);
}

.article-body .mcp-flow__box,
.article-content .mcp-flow__box {
  fill: var(--design-surface);
  stroke: var(--design-line);
  stroke-width: 2;
}

.article-body .mcp-flow__box--key,
.article-content .mcp-flow__box--key {
  fill: var(--design-highlight);
}

.article-body .mcp-flow__box--check,
.article-content .mcp-flow__box--check {
  fill: var(--design-action-soft);
}

.article-body .mcp-flow__box--result,
.article-content .mcp-flow__box--result {
  fill: var(--design-positive-soft);
}

.article-body .mcp-flow__box--deny,
.article-content .mcp-flow__box--deny {
  fill: var(--design-surface-alt);
  stroke: var(--design-soft-line);
  stroke-dasharray: 5 4;
}

.article-body .mcp-flow__step,
.article-content .mcp-flow__step {
  font-size: 15px;
  font-weight: 700;
  fill: var(--design-action);
}

.article-body .mcp-flow__label,
.article-content .mcp-flow__label {
  font-size: 16px;
  font-weight: 700;
  fill: var(--design-ink);
}

.article-body .mcp-flow__label--deny,
.article-content .mcp-flow__label--deny {
  fill: var(--design-muted);
}

.article-body .mcp-flow__sub,
.article-content .mcp-flow__sub {
  font-size: 12px;
  fill: var(--design-muted);
}

.article-body .mcp-flow__line,
.article-content .mcp-flow__line {
  stroke: var(--design-action);
  stroke-width: 2.5;
}

.article-body .mcp-flow__line--deny,
.article-content .mcp-flow__line--deny {
  stroke: var(--design-muted);
  stroke-dasharray: 4 4;
}

.article-body .mcp-flow__arrowhead,
.article-content .mcp-flow__arrowhead {
  fill: var(--design-action);
}

/* 画面モック（枠・ボタン・入力欄をdivで描く。実スクショは使わない） */
.article-body .ui-mock,
.article-content .ui-mock {
  margin: 14px 0 6px;
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius-large);
  background: var(--design-surface);
  overflow: hidden;
}

.article-body .ui-mock__bar,
.article-content .ui-mock__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  background: var(--design-surface-alt);
  border-bottom: 1px solid var(--design-soft-line);
}

.article-body .ui-mock__dot,
.article-content .ui-mock__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--design-soft-line);
}

.article-body .ui-mock__bar-title,
.article-content .ui-mock__bar-title {
  margin-left: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--design-muted);
  letter-spacing: 0.04em;
}

.article-body .ui-mock__body,
.article-content .ui-mock__body {
  padding: 18px;
  background: var(--design-page);
}

.article-body .ui-mock__card,
.article-content .ui-mock__card {
  max-width: 560px;
  padding: 18px 20px;
  background: var(--design-surface);
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius-large);
}

.article-body .ui-mock__card-title,
.article-content .ui-mock__card-title {
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--design-ink);
}

.article-body .ui-mock__card-text,
.article-content .ui-mock__card-text {
  margin: 0 0 12px;
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--design-muted);
}

.article-body .ui-mock__field,
.article-content .ui-mock__field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0 0 12px;
}

.article-body .ui-mock__field-label,
.article-content .ui-mock__field-label {
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--design-muted);
}

.article-body .ui-mock__code,
.article-content .ui-mock__code {
  display: block;
  padding: 9px 12px;
  font-size: 0.88rem;
  color: var(--design-ink);
  background: var(--design-surface-alt);
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius);
  overflow-wrap: anywhere;
}

.article-body .ui-mock__field-text,
.article-content .ui-mock__field-text {
  padding: 9px 12px;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--design-body);
  background: var(--design-surface-alt);
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius);
  overflow-wrap: anywhere;
}

.article-body .ui-mock__actions,
.article-content .ui-mock__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.article-body .ui-mock__button,
.article-content .ui-mock__button {
  display: inline-block;
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--design-ink);
  background: var(--design-surface);
  border: 1px solid var(--design-line);
  border-radius: var(--design-radius);
}

.article-body .ui-mock__button--primary,
.article-content .ui-mock__button--primary {
  color: #fff;
  background: var(--design-action);
  border-color: var(--design-action);
}

.article-body .ui-mock__button--focus,
.article-content .ui-mock__button--focus {
  outline: 3px solid var(--design-hero);
  outline-offset: 2px;
}

.article-body .ui-mock__input,
.article-content .ui-mock__input {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  background: var(--design-surface);
  border: 2px solid var(--design-action);
  border-radius: var(--design-radius);
}

.article-body .ui-mock__input-text,
.article-content .ui-mock__input-text {
  flex: 1;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--design-ink);
  overflow-wrap: anywhere;
}

.article-body .ui-mock__send,
.article-content .ui-mock__send {
  flex: none;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: var(--design-action);
  border-radius: var(--design-radius);
  font-weight: 700;
}

.article-body .ui-mock__msg,
.article-content .ui-mock__msg {
  max-width: 600px;
  padding: 12px 16px;
  margin: 0 0 10px;
  border-radius: var(--design-radius-large);
  background: var(--design-surface);
  border: 1px solid var(--design-soft-line);
}

.article-body .ui-mock__msg:last-child,
.article-content .ui-mock__msg:last-child {
  margin-bottom: 0;
}

.article-body .ui-mock__msg--me,
.article-content .ui-mock__msg--me {
  margin-left: auto;
  background: var(--design-action-soft);
}

.article-body .ui-mock__msg-who,
.article-content .ui-mock__msg-who {
  display: block;
  margin-bottom: 4px;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--design-muted);
  letter-spacing: 0.04em;
}

.article-body .ui-mock__msg p,
.article-content .ui-mock__msg p {
  margin: 0 0 8px;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--design-body);
}

.article-body .ui-mock__msg p:last-child,
.article-content .ui-mock__msg p:last-child {
  margin-bottom: 0;
}

.article-body .ui-mock__note,
.article-content .ui-mock__note {
  position: relative;
  margin: 0;
  padding: 10px 16px 10px 44px;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--design-ink);
  background: var(--design-highlight);
  border-top: 1px solid var(--design-soft-line);
}

.article-body .ui-mock__note::before,
.article-content .ui-mock__note::before {
  content: "💬";
  position: absolute;
  left: 16px;
  top: 9px;
  font-size: 1rem;
}

/* mcp-connect-guide: コネクタ追加画面の再現（2026-08-22） */
.article-content .ui-mock__radios { list-style: none; margin: 6px 0 0; padding: 0; display: grid; gap: 6px; }
.article-content .ui-mock__radio { position: relative; padding: 6px 8px 6px 30px; border-radius: 8px; font-size: 0.95em; color: #4b5563; }
.article-content .ui-mock__radio::before { content: ""; position: absolute; left: 8px; top: 11px; width: 14px; height: 14px; border-radius: 50%; border: 2px solid #9ca3af; background: #fff; }
.article-content .ui-mock__radio--on { background: #eef4ff; color: #1f2a44; font-weight: 600; }
.article-content .ui-mock__radio--on::before { border-color: #2563eb; background: radial-gradient(circle, #2563eb 0 4px, #fff 5px); }
.article-content .ui-mock__radio small { display: block; font-weight: 400; color: #4b5563; margin-top: 2px; }
.article-content .ui-mock__tag { display: inline-block; font-size: 0.8em; padding: 1px 6px; border-radius: 6px; background: #e5e7eb; color: #374151; margin-left: 4px; font-weight: 500; }
.article-content .mcp-warn { color: #b91c1c; }

/* mcp-connect-guide: 使っているAIで分かれるところ（2026-09-17 須崎さん指摘「これだと見逃す」）。
   帯の背景色と大きな文字で、スクロール中でも分岐に気づけるようにする。左の縦線・上だけの色線は使わない。 */
.article-content .mcp-pick { margin: 20px 0; padding: 16px 18px; border-radius: 12px; background: #eef2f7; }
.article-content .mcp-pick__lead { margin: 0 0 12px; font-size: calc(var(--lesson-font-size, 16px) * 1.05) !important; font-weight: 700; color: #172033 !important; }
.article-content .mcp-pick__links { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.article-content .mcp-pick__links > li { margin: 0; padding: 0; list-style: none; }
.article-content .mcp-pick__links > li::before { content: none; }
.article-content .mcp-pick__link { display: block; padding: 15px 18px; border-radius: 12px; font-size: calc(var(--lesson-font-size, 16px) * 1.1); font-weight: 700; text-decoration: none; }
.article-content .mcp-pick__link--claude { background: #203f76; color: #ffffff; }
.article-content .mcp-pick__link--codex { background: #f4d466; color: #172033; }
.article-content .mcp-pick__link:hover { opacity: 0.92; }

.article-content .mcp-branch { margin: 22px 0; border-radius: 12px; overflow: hidden; background: #f4f7fb; }
.article-content .mcp-branch--codex { background: #fdf5e3; }
.article-content .mcp-branch__head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin: 0; padding: 15px 18px; font-size: calc(var(--lesson-font-size, 16px) * 1.3) !important; font-weight: 700; line-height: 1.45 !important; }
.article-content .mcp-branch--claude .mcp-branch__head { background: #203f76; color: #ffffff !important; }
.article-content .mcp-branch--codex .mcp-branch__head { background: #f4d466; color: #172033 !important; }
.article-content .mcp-branch__badge { display: inline-block; padding: 3px 12px; border-radius: 999px; font-size: 0.74em; font-weight: 700; background: rgba(255, 255, 255, 0.22); }
.article-content .mcp-branch--codex .mcp-branch__badge { background: rgba(23, 32, 51, 0.14); }
.article-content .mcp-branch__skip { margin-left: auto; font-size: 0.64em; font-weight: 600; }
.article-content .mcp-branch__body { padding: 16px 18px 6px; }
.article-content .mcp-branch__body > *:first-child { margin-top: 0; }
.article-content .mcp-merge { margin: 20px 0 0; padding: 14px 18px; border-radius: 12px; background: #fff2bd; color: #6b5200 !important; font-size: calc(var(--lesson-font-size, 16px) * 1.05) !important; font-weight: 700; }

@media (max-width: 640px) {
  .article-content .mcp-branch__head { font-size: calc(var(--lesson-font-size, 16px) * 1.15) !important; }
  .article-content .mcp-branch__skip { margin-left: 0; width: 100%; }
}

/* ===== v11: AIとつなげられるツール一覧（integration-tools-2026）。本文は tools/build_integration_tools.py が content/data/integration-tools.json から生成する ===== */
.article-body .tool-legend,
.article-content .tool-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 0 0 18px;
  padding: 12px 16px;
  list-style: none;
  background: var(--design-surface-alt);
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius-large);
  font-size: 0.88rem;
  color: var(--design-body);
}

.article-body .tool-legend li,
.article-content .tool-legend li {
  margin: 0 !important;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-body .tool-nav,
.article-content .tool-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 8px;
  padding: 0;
  list-style: none;
}

.article-body .tool-nav li,
.article-content .tool-nav li {
  margin: 0 !important;
}

.article-body .tool-nav a,
.article-content .tool-nav a {
  display: inline-block;
  padding: 6px 12px;
  color: var(--design-action);
  background: var(--design-surface);
  border: 1px solid var(--design-soft-line);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

.article-body .tool-nav a:hover,
.article-content .tool-nav a:hover {
  background: var(--design-action-soft);
}

/* 棚（カテゴリ）: 読み順を保つ縦1列 */
.article-body .tool-shelf,
.article-content .tool-shelf {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 12px 0 8px;
  padding: 0;
  list-style: none;
}

.article-body .tool-shelf > li,
.article-content .tool-shelf > li {
  margin: 0 !important;
}

.article-body .tool-card,
.article-content .tool-card {
  padding: 14px 18px 12px;
  background: var(--design-surface);
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius-large);
}

.article-body .tool-card__head,
.article-content .tool-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin: 0 0 6px;
}

.article-body .tool-card__name,
.article-content .tool-card__name {
  margin: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  font-size: 1.05rem !important;
  line-height: 1.5 !important;
  font-weight: 750;
  color: var(--design-ink);
}

.article-body .tool-card__what,
.article-content .tool-card__what {
  margin: 0 0 8px !important;
  font-size: 0.95rem !important;
  line-height: 1.7 !important;
  color: var(--design-body);
}

.article-body .tool-badges,
.article-content .tool-badges {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.article-body .tool-badges li,
.article-content .tool-badges li {
  margin: 0 !important;
}

.article-body .tool-badge,
.article-content .tool-badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.6;
  white-space: nowrap;
  color: var(--design-ink);
  background: var(--design-surface-alt);
  border: 1px solid var(--design-soft-line);
}

.article-body .tool-badge--connector,
.article-content .tool-badge--connector {
  color: var(--design-positive);
  background: var(--design-positive-soft);
  border-color: transparent;
}

.article-body .tool-badge--api,
.article-content .tool-badge--api {
  color: var(--design-action);
  background: var(--design-action-soft);
  border-color: transparent;
}

.article-body .tool-badge--browser,
.article-content .tool-badge--browser {
  color: var(--design-highlight-ink);
  background: var(--design-highlight);
  border-color: transparent;
}

.article-body .tool-meta,
.article-content .tool-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  margin: 0;
  font-size: 0.85rem;
  color: var(--design-muted);
}

.article-body .tool-meta > div,
.article-content .tool-meta > div {
  display: inline-flex;
  gap: 4px;
  margin: 0 !important;
}

.article-body .tool-meta dt,
.article-content .tool-meta dt {
  font-weight: 600;
}

.article-body .tool-meta dt::after,
.article-content .tool-meta dt::after {
  content: "：";
}

.article-body .tool-meta dd,
.article-content .tool-meta dd {
  margin: 0;
}

.article-body .tool-card__ways,
.article-content .tool-card__ways {
  margin: 0 0 8px;
  padding: 0;
  list-style: none;
  font-size: 0.88rem;
  color: var(--design-body);
}

.article-body .tool-card__ways li,
.article-content .tool-card__ways li {
  margin: 0 0 2px !important;
  display: flex;
  gap: 8px;
  align-items: baseline;
}

.article-body .tool-card__links,
.article-content .tool-card__links {
  margin: 8px 0 0 !important;
  font-size: 0.88rem;
}

.article-body .tool-card__links a,
.article-content .tool-card__links a {
  margin-right: 12px;
}

.article-body .tool-updated,
.article-content .tool-updated {
  margin: 0 0 16px !important;
  font-size: 0.88rem;
  color: var(--design-muted);
}

.article-body .tool-shelf-note,
.article-content .tool-shelf-note {
  margin: 0 0 4px !important;
  font-size: 0.92rem;
  color: var(--design-muted);
}

/* ===== v13: 「アイコンから探す」グリッド（integration-tools-2026）。
   アイコンだけを等幅で並べる（2026-08-24 須崎指示: 名前を入れると幅が揃わない）。
   名前はリンクの title（マウスを載せた時）と aria-label で伝える ===== */
.article-body .tool-icon-grid,
.article-content .tool-icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: 10px;
  margin: 14px 0 22px;
  padding: 0;
  list-style: none;
}

.article-body .tool-icon-grid > li,
.article-content .tool-icon-grid > li {
  margin: 0 !important;
}

.article-body .tool-icon,
.article-content .tool-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 12px;
  background: var(--design-surface);
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius-large);
  color: var(--design-body);
  text-decoration: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.article-body .tool-icon:hover,
.article-content .tool-icon:hover,
.article-body .tool-icon:focus-visible,
.article-content .tool-icon:focus-visible {
  border-color: var(--design-action);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
  transform: translateY(-2px);
  text-decoration: none;
}

/* ロゴと文字マークの置き場。全カードで同じ寸法にして高さを揃える */
.article-body .tool-icon__art,
.article-content .tool-icon__art {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  flex: none;
}

/* 公式ロゴがPNGのサービス用（content/data/tool-logos/）。角を軽く丸めて並びを揃える */
.article-body .tool-icon__img,
.article-content .tool-icon__img {
  width: 48px !important;
  height: 48px !important;
  max-width: none;
  flex: none;
  display: block;
  object-fit: contain;
  border-radius: 10px;
}

.article-body .tool-icon__svg,
.article-content .tool-icon__svg {
  width: 48px !important;
  height: 48px !important;
  min-width: 48px;
  max-width: none;
  flex: none;
  display: block;
  object-fit: contain;
}

/* 記事本文の共通ルール（svg { height: auto }）に潰されないよう、親側でも寸法を固定する */
.article-body .tool-icon__art > svg,
.article-content .tool-icon__art > svg {
  width: 48px !important;
  height: 48px !important;
  max-width: none !important;
}

/* ロゴが無いサービス用の文字マーク */
.article-body .tool-icon__letters,
.article-content .tool-icon__letters {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  color: #fff;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
}

.article-body .tool-icon__letters--single,
.article-content .tool-icon__letters--single {
  font-size: 1.5rem;
}

.article-body .tool-icon__letters--double,
.article-content .tool-icon__letters--double {
  font-size: 1.15rem;
}

.article-body .tool-icon__letters--triple,
.article-content .tool-icon__letters--triple {
  font-size: 0.9rem;
}

/* 文字マークの色。記事本文は style 属性が消えるのでクラスで持たせる。
   白文字が読める濃さに揃えている。tools/build_integration_tools.py の
   LETTER_MARK_COLOR_COUNT と数を合わせる */
.article-body .tool-icon__letters--c1,
.article-content .tool-icon__letters--c1 { background: #2864F0; }
.article-body .tool-icon__letters--c2,
.article-content .tool-icon__letters--c2 { background: #C0512A; }
.article-body .tool-icon__letters--c3,
.article-content .tool-icon__letters--c3 { background: #2F7D4F; }
.article-body .tool-icon__letters--c4,
.article-content .tool-icon__letters--c4 { background: #6B4E9B; }
.article-body .tool-icon__letters--c5,
.article-content .tool-icon__letters--c5 { background: #C0392B; }
.article-body .tool-icon__letters--c6,
.article-content .tool-icon__letters--c6 { background: #1F7A87; }
.article-body .tool-icon__letters--c7,
.article-content .tool-icon__letters--c7 { background: #8A6A2D; }
.article-body .tool-icon__letters--c8,
.article-content .tool-icon__letters--c8 { background: #4A5169; }

.article-body .tool-credit,
.article-content .tool-credit {
  margin: 14px 0 0 !important;
  font-size: 0.8rem;
  color: var(--design-muted);
}

@media (max-width: 640px) {
  .article-body .tool-icon-grid,
  .article-content .tool-icon-grid {
    grid-template-columns: repeat(auto-fill, minmax(56px, 1fr));
    gap: 8px;
  }

  .article-body .tool-icon,
  .article-content .tool-icon {
    padding: 8px;
  }
}

/* ツール一覧: 上級者向けの折りたたみ（2026-08-23） */
.article-body .tool-advanced,
.article-content .tool-advanced {
  margin: 10px 0 0;
  border: 1px solid var(--design-soft-line);
  border-radius: var(--design-radius-large);
  background: var(--design-surface);
}
.article-body .tool-advanced > summary,
.article-content .tool-advanced > summary {
  cursor: pointer;
  padding: 12px 16px;
  font-weight: 600;
  color: var(--design-body);
  list-style: none;
}
.article-body .tool-advanced > summary::-webkit-details-marker,
.article-content .tool-advanced > summary::-webkit-details-marker { display: none; }
.article-body .tool-advanced__arrow,
.article-content .tool-advanced__arrow {
  display: inline-block;
  margin-right: 8px;
  transition: transform 0.15s ease;
}
.article-body .tool-advanced[open] .tool-advanced__arrow,
.article-content .tool-advanced[open] .tool-advanced__arrow { transform: rotate(90deg); }
.article-body .tool-advanced > .tool-shelf,
.article-content .tool-advanced > .tool-shelf { padding: 0 12px 12px; }