/* Blog: post list, post detail, post form */

.blog {
  max-width: 720px;
  margin: 32px auto;
  padding: 0 20px;
}

/* 記事一覧 + カテゴリーサイドバーの2カラム */

.blog-layout {
  max-width: 1040px;
  margin: 32px auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 32px;
  align-items: start;
}

/* 2カラム内では外側(.blog-layout)が余白を持つ */
.blog--in-layout {
  max-width: none;
  margin: 0;
  padding: 0;
}

.blog-sidebar {
  position: sticky;
  top: 24px;
  padding: 20px;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.blog-sidebar__heading {
  margin: 0 0 12px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted, #6b7280);
}

.blog-sidebar__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.blog-sidebar__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.blog-sidebar__link:hover {
  background: var(--color-bg);
  color: var(--color-primary);
}

.blog-sidebar__link--current {
  background: #eff6ff;
  color: var(--color-primary);
  font-weight: 600;
}

.blog-sidebar__name {
  overflow-wrap: anywhere;
}

.blog-sidebar__count {
  flex-shrink: 0;
  font-size: 0.75rem;
  color: var(--color-text-muted, #6b7280);
}

.blog-sidebar__empty {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-muted, #6b7280);
}

.blog-sidebar__actions {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.blog-sidebar__action {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
}

.blog-sidebar__action:hover {
  color: var(--color-primary-hover);
}

.blog__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.blog__header h1,
.blog > h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
}

.blog > h1 {
  margin-bottom: 24px;
}

.blog__new-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  white-space: nowrap;
}

.blog__new-link:hover {
  color: var(--color-primary-hover);
}

.blog__header-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* サイドバーが出ない狭い画面でだけ見せるリンク。 */
.blog__new-link--narrow-only {
  display: none;
}

.blog__new-link--danger {
  color: #dc2626;
}

.blog__new-link--danger:hover {
  color: #991b1b;
}

/* カテゴリー名のチップ。記事一覧・記事詳細から該当カテゴリーへ移動する。 */
.blog__category-tag {
  display: inline-block;
  margin-right: 8px;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 999px;
  text-decoration: none;
  vertical-align: middle;
}

.blog__category-tag:hover {
  color: #fff;
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.blog__empty {
  color: var(--color-text-muted, #6b7280);
}

.blog__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.blog__item {
  padding: 16px 20px;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.blog__item-title {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.05rem;
}

.blog__item-title:hover {
  color: var(--color-primary);
}

.blog__draft-badge {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #92400e;
  background: #fef3c7;
  border: 1px solid #fcd34d;
  border-radius: 999px;
  vertical-align: middle;
}

.post-form__field--checkbox {
  flex-direction: row;
  align-items: center;
  gap: 8px;
}

.post-form__field--checkbox label {
  font-weight: 500;
}

.blog__item-meta,
.blog-post__meta {
  font-size: 0.85rem;
  color: var(--color-text-muted, #6b7280);
}

/* Pagination */

.blog__pagination {
  margin-top: 24px;
  display: flex;
  justify-content: center;
}

.pagy {
  display: flex;
  align-items: center;
  gap: 4px;
}

.pagy a {
  min-width: 34px;
  padding: 6px 10px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.pagy a:hover:not([aria-disabled="true"]) {
  background: var(--color-bg);
  color: var(--color-primary-hover);
}

.pagy a[aria-current="page"] {
  color: #fff;
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.pagy a[aria-disabled="true"] {
  color: var(--color-text-muted, #9ca3af);
  cursor: default;
}

.pagy a[role="separator"] {
  border: none;
  background: none;
}

/* Post detail */

.blog-post {
  max-width: 720px;
  margin: 32px auto;
  padding: 32px;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.blog-post__title {
  margin: 0 0 8px;
  font-size: 1.6rem;
  font-weight: 700;
}

.blog-post__meta {
  margin: 0 0 24px;
}

.blog-post__body {
  line-height: 1.8;
  color: var(--color-text);
  overflow-wrap: break-word;
}

.blog-post__body h1,
.blog-post__body h2,
.blog-post__body h3 {
  margin: 1.4em 0 0.5em;
  line-height: 1.4;
}

.blog-post__body h1 { font-size: 1.4rem; }
.blog-post__body h2 { font-size: 1.25rem; }
.blog-post__body h3 { font-size: 1.1rem; }

.blog-post__body pre {
  padding: 14px 16px;
  background: #1f2937;
  color: #f9fafb;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.6;
}

.blog-post__body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  background: rgba(0, 0, 0, 0.06);
  padding: 2px 5px;
  border-radius: 4px;
}

.blog-post__body pre code {
  background: none;
  padding: 0;
}

.blog-post__body blockquote {
  margin: 1em 0;
  padding: 4px 16px;
  border-left: 4px solid var(--color-border);
  color: var(--color-text-muted, #6b7280);
}

.blog-post__body img {
  max-width: 100%;
}

.blog-post__body table {
  border-collapse: collapse;
  margin: 1em 0;
}

.blog-post__body th,
.blog-post__body td {
  border: 1px solid var(--color-border);
  padding: 6px 12px;
}

/* 別行立ての数式は横に長くなりやすいので、はみ出す代わりに横スクロールさせる */
.blog-post__body .katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 2px 0;
}

/* 記事本文とノート本文は同じ Markdown レンダラ(MarkdownRenderer +
   CodeHighlighter)を通るので、体裁も共有する。.blog-post__body 側は
   既存のまま残し、共有したい要素だけ .markdown-body として並記する。 */
.markdown-body {
  line-height: 1.8;
  color: var(--color-text);
  overflow-wrap: break-word;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
  margin: 1.4em 0 0.5em;
  line-height: 1.4;
}

.markdown-body h1 { font-size: 1.4rem; }
.markdown-body h2 { font-size: 1.25rem; }
.markdown-body h3 { font-size: 1.1rem; }

.markdown-body pre {
  padding: 14px 16px;
  background: #1f2937;
  color: #f9fafb;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.9rem;
  line-height: 1.6;
}

.markdown-body code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  background: rgba(0, 0, 0, 0.06);
  padding: 2px 5px;
  border-radius: 4px;
}

.markdown-body pre code {
  background: none;
  padding: 0;
}

.markdown-body blockquote {
  margin: 1em 0;
  padding: 4px 16px;
  border-left: 4px solid var(--color-border);
  color: var(--color-text-muted, #6b7280);
}

.markdown-body img {
  max-width: 100%;
}

.markdown-body table {
  border-collapse: collapse;
  margin: 1em 0;
}

.markdown-body th,
.markdown-body td {
  border: 1px solid var(--color-border);
  padding: 6px 12px;
}

.blog-post__actions {
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 16px;
}

.blog-post__link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
}

.blog-post__link:hover {
  color: var(--color-primary-hover);
}

.blog-post__link--danger {
  color: #dc2626;
}

.blog-post__link--danger:hover {
  color: #991b1b;
}

/* Post form */

.post-form__field {
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.post-form__field label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}

.post-form__hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-text-muted, #6b7280);
}

.post-form__field input,
.post-form__field textarea,
.post-form__field select {
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  color: var(--color-text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.post-form__field input:focus,
.post-form__field textarea:focus,
.post-form__field select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* Editor layout: form on the left, preview on the right */

.blog--wide {
  max-width: 1200px;
}

.post-editor {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

/* フォームをスクロールしてもプレビューが見えるよう追従させる。 */
.post-editor__preview {
  position: sticky;
  top: 24px;
  max-height: calc(100vh - 48px);
  overflow-y: auto;
}

.post-preview__heading {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 12px;
  font-size: 1.1rem;
  font-weight: 700;
}

.post-preview__note {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted, #6b7280);
}

.post-editor__preview turbo-frame {
  display: block;
}

/* 自動更新中は少し薄くして、反映待ちであることを伝える。 */
.post-editor__preview turbo-frame[busy] {
  opacity: 0.55;
  transition: opacity 0.15s ease;
}

.post-preview__placeholder {
  margin: 0;
  padding: 32px 20px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-muted, #6b7280);
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
}

.blog-post--preview {
  max-width: none;
  margin: 0;
  padding: 24px;
  border: 1px dashed var(--color-border);
}

.blog-post__empty {
  color: var(--color-text-muted, #6b7280);
}

.post-form__errors {
  margin-bottom: 20px;
  padding: 14px 16px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius);
  color: #991b1b;
}

.post-form__errors ul {
  margin: 0;
  padding-left: 20px;
  font-size: 0.9rem;
}

/* 横幅が足りない画面ではプレビューをフォームの下へ回す。 */
@media (max-width: 1000px) {
  .post-editor {
    grid-template-columns: minmax(0, 1fr);
  }

  .post-editor__preview {
    position: static;
    max-height: none;
    overflow-y: visible;
  }
}

/* 幅が足りない画面ではサイドバーを出さず、カテゴリー一覧ページへのリンクで代替する。 */
@media (max-width: 900px) {
  .blog-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  /* 1カラムでは記事一覧が横に伸びすぎないよう本文幅を保つ。
     margin:auto ではなく justify-self で寄せる(グリッドアイテムが縮むため)。 */
  .blog--in-layout {
    width: 100%;
    max-width: 720px;
    justify-self: center;
  }

  .blog-sidebar {
    display: none;
  }

  .blog__new-link--narrow-only {
    display: inline;
  }
}

@media (max-width: 640px) {
  /* .blog-layout の中の .blog には margin を付けない。
     グリッドアイテムに margin:auto が付くと引き伸ばされず内容幅まで縮んでしまう。 */
  .blog:not(.blog--in-layout),
  .blog-layout,
  .blog-post {
    margin: 16px auto;
  }

  .blog-post {
    margin-left: 16px;
    margin-right: 16px;
    padding: 24px;
  }
}