/* =========================================================
   サナドのアラビア語オンラインレッスン 共通スタイル
   ブランドカラー: teal #0f766e
   index.html と blog 配下の全記事で共有
   ========================================================= */

:root {
  --brand: #0f766e;
  --brand-dark: #0b5b54;
  --brand-light: #f0fdfa;
  --ink: #222;
  --muted: #666;
  --line: #e2e8e6;
  --bg: #fff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
               "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  margin: 0;
  line-height: 1.9;
  color: var(--ink);
  background: var(--bg);
}

a { color: var(--brand); }

/* ===== 共通ヘッダー ===== */
.site-header {
  background: var(--brand);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 20;
}
.site-header .inner {
  max-width: 980px;
  margin: auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.site-header a { color: #fff; text-decoration: none; }
.site-header .brand { font-weight: 700; font-size: 1.05rem; white-space: nowrap; }
.site-nav a { margin-left: 1.2rem; font-size: 0.95rem; opacity: 0.95; }
.site-nav a:hover { text-decoration: underline; opacity: 1; }

/* ===== パンくず ===== */
.breadcrumb {
  max-width: 820px;
  margin: 1.4rem auto 0;
  padding: 0 1.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}
.breadcrumb a { color: var(--brand); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* ===== 記事本文 ===== */
article {
  max-width: 820px;
  margin: auto;
  padding: 1.2rem 1.5rem 3rem;
}
article h1 {
  font-size: 2rem;
  line-height: 1.3;
  margin: 0.6rem 0 1rem;
}
.post-meta {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 2.5rem;
}
article h2 {
  font-size: 1.4rem;
  margin-top: 3rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--brand);
  line-height: 1.4;
}
article h3 {
  margin-top: 2.2rem;
  font-size: 1.15rem;
  color: var(--brand-dark);
}
article p { margin: 1.3rem 0; }
article ul, article ol { padding-left: 1.3rem; }
article li { margin: 0.6rem 0; }
article img { max-width: 100%; height: auto; border-radius: 10px; }
article hr { border: none; border-top: 1px solid var(--line); margin: 2.6rem 0; }
article strong { font-weight: 700; }

/* ===== 補足ボックス / 引用 ===== */
.box {
  background: var(--brand-light);
  border-left: 5px solid var(--brand);
  padding: 1.4rem 1.6rem;
  margin: 2.5rem 0;
  border-radius: 10px;
}
.quote {
  border-left: 4px solid var(--line);
  padding: 0.6rem 1.2rem;
  margin: 2rem 0;
  color: #444;
  background: #fafafa;
  border-radius: 6px;
}

/* ===== 語彙カード ===== */
.vocab {
  border: 1px solid var(--line);
  border-left: 5px solid var(--brand);
  border-radius: 10px;
  padding: 1.1rem 1.3rem;
  margin: 1.2rem 0;
  background: #fff;
}
.vocab .arabic {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--brand-dark);
  direction: rtl;
  unicode-bidi: plaintext;
}
.vocab .reading { color: var(--muted); margin-top: 0.2rem; }
.vocab .meaning { margin-top: 0.5rem; font-weight: 600; }
.vocab .note { margin-top: 0.5rem; font-size: 0.92rem; color: #555; }
.vocab .example {
  margin-top: 0.7rem;
  padding: 0.7rem 0.9rem;
  background: var(--brand-light);
  border-radius: 8px;
  font-size: 0.95rem;
}
.vocab .example .ar { direction: rtl; unicode-bidi: plaintext; font-size: 1.1rem; }

/* ===== 目次 ===== */
.toc { background: var(--brand-light); border-left: 5px solid var(--brand); border-radius: 10px; padding: 1.2rem 1.5rem; margin: 2rem 0; }
.toc strong { display: block; margin-bottom: 0.6rem; }
.toc ol { margin: 0; padding-left: 1.3rem; }
.toc a { text-decoration: none; }
.toc a:hover { text-decoration: underline; }

/* ===== 比較テーブル ===== */
.table-wrap { overflow-x: auto; margin: 1.6rem 0; }
.compare { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.compare th, .compare td { border: 1px solid var(--line); padding: 0.7rem 0.8rem; text-align: left; vertical-align: top; }
.compare thead th { background: var(--brand); color: #fff; font-weight: 700; }
.compare tbody th { background: var(--brand-light); color: var(--brand-dark); white-space: nowrap; }
.compare tbody tr:nth-child(even) td { background: #fafafa; }

/* ===== FAQ ===== */
.faq-q { margin-top: 2rem; font-size: 1.1rem; color: var(--brand-dark); }
.faq-a { margin: 0.6rem 0 0; }

/* ===== 関連記事 ===== */
.related {
  max-width: 820px;
  margin: 3.2rem auto 0;
  padding: 0 1.5rem;
}
.related h2 {
  font-size: 1.2rem;
  border-bottom: 2px solid var(--brand);
  padding-bottom: 0.4rem;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0.9rem;
  margin-top: 1.2rem;
}
.related-grid a {
  display: block;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  text-decoration: none;
  color: var(--ink);
  background: #fafafa;
  transition: transform .15s ease, box-shadow .15s ease;
}
.related-grid a:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.08);
}

/* ===== シリーズ前後ナビ ===== */
.series-nav {
  max-width: 820px;
  margin: 2rem auto 0;
  padding: 0 1.5rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.95rem;
}
.series-nav a { color: var(--brand); text-decoration: none; }
.series-nav a:hover { text-decoration: underline; }
.series-nav .disabled { color: #bbb; }

/* ===== CTA ===== */
.cta {
  max-width: 820px;
  margin: 3.2rem auto 0;
  background: var(--brand);
  color: #fff;
  padding: 2.2rem 1.5rem;
  text-align: center;
  border-radius: 14px;
}
.cta p { margin: 0 0 0.4rem; }
.cta a {
  background: #fff;
  color: var(--brand);
  padding: 0.9rem 1.7rem;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 700;
  display: inline-block;
  margin-top: 1.2rem;
}

/* ===== 共通フッター ===== */
.site-footer {
  background: #f4f4f4;
  text-align: center;
  padding: 2.5rem 1rem;
  margin-top: 3.5rem;
  font-size: 0.9rem;
  color: var(--muted);
}
.site-footer a { color: var(--brand); }

/* ===== index トップページ用 ===== */
.hero {
  background: var(--brand);
  color: #fff;
  text-align: center;
  padding: 3.2rem 1.5rem;
}
.hero h1 { margin: 0 0 0.6rem; font-size: 2rem; line-height: 1.3; }
.hero p { margin: 0; opacity: 0.95; }
section.page {
  max-width: 820px;
  margin: auto;
  padding: 2.6rem 1.5rem;
}
section.page h2 {
  border-bottom: 2px solid var(--brand);
  padding-bottom: 0.4rem;
}
.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  margin-top: 1rem;
  font-weight: 700;
}
.btn:hover { background: var(--brand-dark); }
.link-box {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.2rem 1.4rem;
  margin: 1.6rem 0;
  background: #fafafa;
}
.link-box h2, .link-box h3 { margin: 0 0 0.8rem; font-size: 1.1rem; border: none; padding: 0; }
.link-box ul { list-style: none; padding: 0; margin: 0; }
.link-box li { margin-bottom: 0.6rem; }
.link-box a { text-decoration: none; color: var(--brand); }
.link-box a:hover { text-decoration: underline; }

/* ===== モバイル ===== */
@media (max-width: 600px) {
  article h1, .hero h1 { font-size: 1.6rem; }
  article h2 { font-size: 1.25rem; }
  .site-header .inner { padding: 0.75rem 1rem; }
  .site-nav a { margin-left: 0.8rem; }
}

/* ===== RTL（アラビア語ページ）=====
   dir="rtl" のページでのみ適用。日本語ページには影響しない。 */
[dir="rtl"] body { text-align: right; }
[dir="rtl"] .site-nav a { margin-left: 0; margin-right: 1.2rem; }
[dir="rtl"] article ul,
[dir="rtl"] article ol,
[dir="rtl"] .toc ol { padding-left: 0; padding-right: 1.3rem; }
[dir="rtl"] .box,
[dir="rtl"] .toc,
[dir="rtl"] .vocab { border-left: none; border-right: 5px solid var(--brand); }
[dir="rtl"] .quote { border-left: none; border-right: 4px solid var(--line); }
[dir="rtl"] .compare th,
[dir="rtl"] .compare td { text-align: right; }
[dir="rtl"] .vocab .arabic { direction: rtl; }
/* 日本語の語句・価格はLTRで表示（数字と混在しても崩れないように） */
[dir="rtl"] .ja { direction: ltr; unicode-bidi: isolate; display: inline-block; }
[dir="rtl"] .price-note { color: var(--muted); font-size: 0.9rem; }
@media (max-width: 640px) {
  [dir="rtl"] .site-nav a { margin-left: 0; margin-right: 0.8rem; }
}