/* ============================================================
   tplybook — 専用スタイル（Note風）
   styles.css と subpage.css の補強として読み込まれる。
   ============================================================ */

/* ----- 全体 ----- */
.tplybook-narrow {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

/* ----- subhero の上書き（tplybookのみ） ----- */
/* タイトルを控えめに。長文タイトルが2行になっても破綻しないサイズ感に */
.subhero-title {
  font-size: clamp(26px, 3.2vw, 38px);
  line-height: 1.4;
  letter-spacing: -0.01em;
}
@media (max-width: 640px) {
  .subhero-title { font-size: 23px; line-height: 1.5; }
}
/* kicker のイタリックをやめ、落ち着いたラベル調に */
.subhero-kicker {
  font-family: 'JetBrains Mono', monospace;
  font-style: normal;
  font-size: 13px;
  letter-spacing: 0.06em;
}
@media (max-width: 640px) {
  .subhero-kicker { font-size: 12px; }
}

/* ----- カバー画像 ----- */
.tplybook-cover {
  margin: -2rem 0 2.5rem;
}
.tplybook-cover img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* ----- 記事本文ラッパー ----- */
.tplybook-article {
  padding: 2rem 0 4rem;
}

/* ============================================================
   prose — 本文タイポグラフィ
   ============================================================ */
.tplybook-prose {
  font-size: 1.0625rem;       /* 17px */
  line-height: 1.95;
  color: #2a2a2a;
  letter-spacing: 0.02em;
}

/* 見出し — Note風（下線なし、サイズと太さで階層を表現） */
.tplybook-prose h2,
.tplybook-prose h3,
.tplybook-prose h4,
.tplybook-prose h5,
.tplybook-prose h6 {
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: #1a1a1a;
}
.tplybook-prose h2 {
  font-size: 1.55rem;
  margin: 2.8em 0 0.7em;
}
.tplybook-prose h3 {
  font-size: 1.25rem;
  margin: 2.2em 0 0.6em;
}
.tplybook-prose h4 {
  font-size: 1.08rem;
  margin: 1.8em 0 0.5em;
  color: #333;
}
.tplybook-prose > *:first-child {
  margin-top: 0;
}

/* 段落 */
.tplybook-prose p {
  margin: 1.4em 0;
}

/* 強調（太字）— マーカー風ハイライト */
.tplybook-prose strong {
  font-weight: 700;
  color: #1a1a1a;
  background: linear-gradient(transparent 62%, rgba(255, 220, 100, 0.45) 62%);
  padding: 0 0.05em;
}

/* イタリック — 本文中の em は使わないが、念のためふつうに */
.tplybook-prose em {
  font-style: italic;
  color: #444;
}

/* リンク — 控えめな下線 */
.tplybook-prose a {
  color: #2e8870;
  text-decoration: none;
  border-bottom: 1px solid rgba(46, 136, 112, 0.35);
  transition: border-color 0.15s, color 0.15s;
  padding-bottom: 1px;
}
.tplybook-prose a:hover {
  color: #1f6b56;
  border-bottom-color: rgba(46, 136, 112, 0.9);
}

/* リスト */
.tplybook-prose ul,
.tplybook-prose ol {
  margin: 1.4em 0;
  padding-left: 1.6em;
}
.tplybook-prose li {
  margin: 0.5em 0;
}
.tplybook-prose ul ul,
.tplybook-prose ul ol,
.tplybook-prose ol ul,
.tplybook-prose ol ol {
  margin: 0.4em 0;
}

/* インラインコード */
.tplybook-prose code {
  background: #f4f4f6;
  padding: 0.15em 0.45em;
  border-radius: 4px;
  font-size: 0.92em;
  font-family: 'JetBrains Mono', monospace;
  color: #b1303d;
}

/* コードブロック */
.tplybook-prose pre {
  background: #1e1e26;
  color: #e8e8ec;
  padding: 1.3em 1.5em;
  border-radius: 8px;
  overflow-x: auto;
  margin: 1.8em 0;
  font-size: 0.9rem;
  line-height: 1.75;
}
.tplybook-prose pre code {
  background: transparent;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* 水平線 — Note風の中央配置短いライン */
.tplybook-prose hr {
  border: 0;
  border-top: 1px solid #ccc;
  width: 80px;
  margin: 3.5em auto;
}

/* 引用 */
.tplybook-prose blockquote {
  border-left: 3px solid #d4d4d7;
  padding: 0.2em 1.4em;
  margin: 1.8em 0;
  color: #666;
  background: transparent;
}
.tplybook-prose blockquote p {
  margin: 0.6em 0;
}

/* テーブル */
.tplybook-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.8em 0;
  font-size: 0.95rem;
}
.tplybook-prose th,
.tplybook-prose td {
  border: 1px solid #e4e4e7;
  padding: 0.65em 0.95em;
  text-align: left;
  vertical-align: top;
}
.tplybook-prose th {
  background: #f7f7f9;
  font-weight: 700;
}

/* 画像・動画（MarkdownLiteが生成する figure.lesson-figure） */
.tplybook-prose .lesson-figure {
  margin: 2.2em 0;
}
.tplybook-prose .lesson-figure img,
.tplybook-prose .lesson-figure video {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 6px;
}
.tplybook-prose .lesson-figure figcaption {
  margin-top: 0.7em;
  font-size: 0.88rem;
  color: #888;
  text-align: center;
}

/* ============================================================
   タグリスト
   ============================================================ */
.tplybook-tag-list {
  list-style: none;
  padding: 0;
  margin: 3.5em 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.tplybook-tag {
  display: inline-block;
  padding: 0.3em 0.95em;
  background: #f0f0f3;
  border-radius: 999px;
  font-size: 0.85rem;
  color: #555;
  letter-spacing: 0.02em;
}

/* ============================================================
   レスポンシブ
   ============================================================ */
@media (max-width: 768px) {
  .tplybook-prose {
    font-size: 1rem;
    line-height: 1.9;
  }
  .tplybook-prose h2 { font-size: 1.35rem; }
  .tplybook-prose h3 { font-size: 1.15rem; }
  .tplybook-prose h4 { font-size: 1.02rem; }
  .tplybook-cover {
    margin: -1rem 0 2rem;
  }
}

/* ============================================================
   記事一覧（index）
   ============================================================ */
.tplybook-list {
  padding: 3rem 0 4.5rem;
}

/* イントロ文 */
.tplybook-list-intro {
  max-width: 720px;
  margin: 0 auto 2.6rem;
  font-size: 1.02rem;
  line-height: 1.9;
  color: #555;
  letter-spacing: 0.02em;
}

/* 記事数バッジ */
.tplybook-list-count {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  margin-bottom: 2rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: #2e8870;
  text-transform: uppercase;
}
.tplybook-list-count::before {
  content: "";
  width: 22px;
  height: 1px;
  background: #2e8870;
}

/* グリッド */
.tplybook-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.8rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

/* カード */
.tplybook-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid #ececef;
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.tplybook-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.10);
  border-color: #dcdce0;
}
.tplybook-card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
}

/* カバー画像 */
.tplybook-card-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #f2f2f5;
}
.tplybook-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.tplybook-card:hover .tplybook-card-thumb img {
  transform: scale(1.04);
}

/* 画像なしカードのプレースホルダー */
.tplybook-card-thumb.is-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #eef5f2 0%, #e3efe9 100%);
}
.tplybook-card-thumb.is-empty span {
  font-family: 'Instrument Serif', serif;
  font-size: 2rem;
  font-style: italic;
  color: #9bbcb0;
  letter-spacing: 0.04em;
}

/* カード本文 */
.tplybook-card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 1.3rem 1.4rem 1.5rem;
}
.tplybook-card-kicker {
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: #8a8a8f;
  margin-bottom: 0.7rem;
}
.tplybook-card-cat {
  color: #2e8870;
}
.tplybook-card-title {
  font-size: 1.18rem;
  font-weight: 700;
  line-height: 1.5;
  color: #1a1a1a;
  margin: 0 0 0.6rem;
  letter-spacing: 0.01em;
}
.tplybook-card:hover .tplybook-card-title {
  color: #2e8870;
}
.tplybook-card-excerpt {
  font-size: 0.92rem;
  line-height: 1.75;
  color: #666;
  margin: 0 0 1.2rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* カード下部のタグ＋続きを読む */
.tplybook-card-foot {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}
.tplybook-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.tplybook-card-tags li {
  font-size: 0.74rem;
  color: #888;
  background: #f3f3f6;
  border-radius: 999px;
  padding: 0.2em 0.7em;
}
.tplybook-card-more {
  display: inline-flex;
  align-items: center;
  gap: 0.35em;
  font-size: 0.8rem;
  font-weight: 500;
  color: #2e8870;
  white-space: nowrap;
}
.tplybook-card-more svg {
  transition: transform 0.18s ease;
}
.tplybook-card:hover .tplybook-card-more svg {
  transform: translateX(3px);
}

/* 記事ゼロ時 */
.tplybook-empty {
  max-width: 540px;
  margin: 2rem auto;
  padding: 3rem 2rem;
  text-align: center;
  border: 1px dashed #d6d6da;
  border-radius: 12px;
  color: #888;
}
.tplybook-empty h3 {
  font-size: 1.2rem;
  color: #555;
  margin: 0 0 0.6rem;
}

@media (max-width: 768px) {
  .tplybook-list { padding: 2rem 0 3rem; }
  .tplybook-grid {
    grid-template-columns: 1fr;
    gap: 1.4rem;
  }
}