/* ============================================================
   single.css — ブログ記事ページ
   ------------------------------------------------------------
   ★本文（.ar-body）にはclassが一つも付いていません。
     記事はElementorではなく素のHTMLで書かれているので、
     p / h2 / h3 / img / table を「要素で」指定しています。
     記事を書くときにclassを付ける必要はありません。
   ============================================================ */

.page-single {
  --ar-w:     720px;     /* 本文の横幅。日本語は1行35〜40字が読みやすい */
  --ar-ink:   #26303A;   /* 本文の文字色。真っ黒だと目が疲れます */
  --ar-soft:  #5F6B76;
  --ar-line:  #E6EDF3;
  --ar-paper: #FBFAF6;
}

/* ============================================================
   記事の頭
   ============================================================ */
.page-single .ar-wrap {
  max-width: var(--ar-w);
  margin: 0 auto;
  padding-inline: 22px;
}
.page-single .ar-head { padding-top: 32px; }
/* 写真が先、タイトルが後。写真とタイトルの間隔はここ */
.page-single .ar-head .ar-wrap { margin-top: 30px; }

.page-single .ar-cat {
  display: inline-block;
  font-size: 11.5px; font-weight: 700; letter-spacing: .08em;
  color: #fff; background: var(--main);
  padding: 4px 11px; border-radius: 4px; text-decoration: none;
}
.page-single .ar-cat:hover { opacity: .85; }

.page-single .ar-title {
  font-size: clamp(24px, 5.4vw, 38px);
  font-weight: 900;
  line-height: 1.55;
  letter-spacing: -.01em;
  margin: 16px 0 0;
  text-wrap: balance;
}

.page-single .ar-meta {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin: 16px 0 0;
  font-size: 13px; color: var(--ar-soft); letter-spacing: .04em;
}
.page-single .ar-by { position: relative; padding-left: 15px; }
.page-single .ar-by::before {
  content: ""; position: absolute; left: 0; top: 50%;
  width: 1px; height: 12px; margin-top: -6px; background: var(--line);
}

.page-single .ar-thumb {
  margin: 0 auto;
  max-width: 980px;
  padding-inline: 22px;
}
.page-single .ar-thumb img {
  width: 100%; height: auto; border-radius: 12px; display: block;
}

/* ============================================================
   目次
   ============================================================ */
.page-single .ar-toc {
  margin: 44px 0 0;
  padding: 22px 24px 24px;
  background: var(--ar-paper);
  border: 1px solid var(--ar-line);
  border-radius: 12px;
}
.page-single .toc-head {
  font-size: 13px; font-weight: 900; letter-spacing: .14em;
  color: var(--main); margin: 0 0 12px;
}
.page-single .toc-list { counter-reset: toc; margin: 0; padding: 0; list-style: none; }
.page-single .toc-list li { margin: 0; }
.page-single .toc-list a {
  display: block;
  padding: 6px 0;
  font-size: 14px; line-height: 1.7; color: var(--ar-ink);
  text-decoration: none;
}
.page-single .toc-list a:hover { color: var(--main); text-decoration: underline; text-underline-offset: 3px; }
.page-single .toc-main { counter-increment: toc; }
.page-single .toc-main > a::before {
  content: counter(toc) ". ";
  font-weight: 700; color: var(--main);
}
.page-single .toc-sub > a { padding-left: 20px; font-size: 13px; color: var(--ar-soft); }
.page-single .toc-sub > a::before { content: "— "; color: var(--line); }

/* 折りたたみ（見出しが7つ以上の記事） */
.page-single .ar-toc.is-folded .toc-list {
  max-height: 210px; overflow: hidden;
  -webkit-mask-image: linear-gradient(#000 60%, transparent);
          mask-image: linear-gradient(#000 60%, transparent);
}
.page-single .toc-toggle {
  margin-top: 10px; font: inherit; font-size: 12.5px; font-weight: 700;
  color: var(--main); background: none; border: 0; padding: 4px 0; cursor: pointer;
}
.page-single .toc-toggle:hover { text-decoration: underline; }

/* ============================================================
   本文
   ------------------------------------------------------------
   ★ここが記事の読みやすさを決めています。
     行間（line-height）は日本語だと 1.9〜2.1 くらいが読みやすい範囲です。
   ============================================================ */
.page-single .ar-body {
  margin-top: 40px;
  font-size: 16px;
  line-height: 2.05;
  color: var(--ar-ink);
  /* 見出しに飛んだとき、固定ヘッダーに隠れないように */
  scroll-padding-top: calc(var(--hd-h) + 20px);
}
.page-single .ar-body > :first-child { margin-top: 0; }

.page-single .ar-body p { margin: 0 0 1.6em; }

.page-single .ar-body h2 {
  font-size: clamp(20px, 4.6vw, 26px);
  font-weight: 900;
  line-height: 1.55;
  margin: 3em 0 1.1em;
  padding-bottom: .5em;
  border-bottom: 2px solid var(--main);
  scroll-margin-top: calc(var(--hd-h) + 20px);
}
.page-single .ar-body h3 {
  font-size: clamp(17px, 4vw, 20px);
  font-weight: 900;
  line-height: 1.6;
  margin: 2.4em 0 .9em;
  padding-left: 13px;
  border-left: 4px solid var(--main);
  scroll-margin-top: calc(var(--hd-h) + 20px);
}
.page-single .ar-body h4 {
  font-size: 16.5px; font-weight: 900; margin: 2em 0 .7em;
  scroll-margin-top: calc(var(--hd-h) + 20px);
}

.page-single .ar-body strong,
.page-single .ar-body b { font-weight: 700; }

.page-single .ar-body a {
  color: var(--main);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.page-single .ar-body a:hover { text-decoration-thickness: 2px; }

.page-single .ar-body img {
  display: block;
  width: 100%; height: auto;
  margin: 1.8em auto;
  border-radius: 10px;
}

.page-single .ar-body ul,
.page-single .ar-body ol { margin: 0 0 1.6em; padding-left: 1.4em; }
.page-single .ar-body ul { list-style: disc; }
.page-single .ar-body ol { list-style: decimal; }
.page-single .ar-body li { margin-bottom: .5em; }

/* 商品リンクの表（楽天アフィリエイト）。
   中身は元のインラインCSSで完結しているので、はみ出しだけ面倒を見ます。 */
.page-single .ar-body table { max-width: 100%; border-collapse: collapse; margin: 1.8em 0; }
.page-single .ar-body table img { margin: 0; border-radius: 4px; }
.page-single .ar-body td { vertical-align: top; }

/* ★保険：Google広告の枠が残っていたら隠す
     記事本文から広告タグ12個は削除済みです。
     この1行は、将来うっかり貼られたときの受け皿として残しています。
     広告を再開するなら、この行を消してください。 */
.page-single .ar-body ins[data-ad-client] { display: none !important; }

/* ============================================================
   書いた人
   ============================================================ */
.page-single .ar-author {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 20px;
  margin-top: 64px;
  padding: 26px 26px 28px;
  background: var(--ar-paper);
  border: 1px solid var(--ar-line);
  border-radius: 12px;
}
.page-single .ar-author figure { margin: 0; }
.page-single .ar-author img {
  width: 96px; height: 96px;
  object-fit: cover; object-position: 50% 6%;
  border-radius: 50%;
}
.page-single .au-label {
  font-size: 11px; font-weight: 700; letter-spacing: .14em;
  color: var(--main); margin: 0 0 6px;
}
.page-single .au-name {
  font-size: 18px; font-weight: 900; line-height: 1.5; margin: 0 0 10px;
}
.page-single .au-name span {
  display: block; font-size: 12px; font-weight: 500;
  color: var(--ar-soft); letter-spacing: .04em;
}
.page-single .au-bio { font-size: 13.5px; line-height: 1.95; color: var(--ar-soft); margin: 0 0 12px; }
.page-single .au-more { font-size: 13px; font-weight: 700; color: var(--main); text-decoration: none; }
.page-single .au-more:hover { text-decoration: underline; }

/* ============================================================
   体験レッスンへ
   ============================================================ */
.page-single .ar-cta {
  margin-top: 26px;
  padding: 32px 26px 34px;
  background: var(--navy);
  border-radius: 12px;
  text-align: center;
  color: #fff;
}
.page-single .cta-lead {
  font-size: clamp(17px, 4.2vw, 21px); font-weight: 900; line-height: 1.6; margin: 0 0 12px;
}
.page-single .cta-text {
  font-size: 13.5px; line-height: 1.95; color: rgba(255,255,255,.8); margin: 0 0 22px;
}
.page-single .cta-btn {
  display: inline-flex; align-items: center; gap: 9px;
  background: var(--cta); color: #fff;
  font-size: 15px; font-weight: 700; letter-spacing: .03em;
  padding: 14px 30px; border-radius: 999px; text-decoration: none;
  transition: opacity .2s, transform .2s;
}
.page-single .cta-btn:hover { opacity: .9; transform: translateY(-2px); }

/* ============================================================
   関連記事
   ============================================================ */
.page-single .ar-related { margin-top: 72px; padding: 56px 0 8px; background: var(--main-light); }
.page-single .ar-related .ar-wrap { max-width: 980px; }
.page-single .rel-head {
  font-size: clamp(19px, 4.4vw, 24px); font-weight: 900;
  text-align: center; margin: 0 0 30px; letter-spacing: -.02em;
}
.page-single .rel-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.page-single .rel-list a {
  display: flex; flex-direction: column; height: 100%;
  background: #fff; border: 1px solid var(--ar-line); border-radius: 10px;
  overflow: hidden; text-decoration: none;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.page-single .rel-list a:hover {
  transform: translateY(-3px); border-color: var(--main);
  box-shadow: 0 14px 32px -22px rgba(5,123,192,.6);
}
.page-single .rel-photo { display: block; aspect-ratio: 16 / 9; overflow: hidden; background: var(--main-light); }
.page-single .rel-photo img { width: 100%; height: 100%; object-fit: cover; }
.page-single .rel-noimg {
  width: 100%; height: 100%; display: grid; place-items: center; text-align: center;
  font-size: 11px; font-weight: 900; letter-spacing: .16em; line-height: 1.7;
  color: var(--main); background: var(--main-light);
}
.page-single .rel-title { padding: 13px 15px 17px; font-size: 13px; font-weight: 700; line-height: 1.7; color: var(--dark); }
.page-single .rel-more { margin-top: 34px; text-align: center; }

/* ============================================================
   狭い画面
   ============================================================ */
@media (max-width: 768px) {
  .page-single .ar-head { padding-top: 20px; }
  .page-single .ar-head .ar-wrap { margin-top: 22px; }
  .page-single .ar-body { font-size: 15.5px; line-height: 2; margin-top: 32px; }
  .page-single .ar-toc { margin-top: 34px; padding: 18px 18px 20px; }
  .page-single .ar-author { grid-template-columns: 1fr; gap: 14px; padding: 22px 20px 24px; }
  .page-single .ar-author img { width: 76px; height: 76px; }
  .page-single .rel-list { grid-template-columns: 1fr; gap: 14px; }
  .page-single .ar-related { margin-top: 56px; padding-top: 44px; }
}