/* ============================================================
   Bc Markdown View — markdown.css
   interlink.or.jp スタイルに倣ったシンプル・可読性重視デザイン
   ============================================================ */

:root {
    --bg:           #ffffff;
    --text:         #1a1a1a;
    --muted:        #555555;
    --border:       #dde1e7;
    --accent:       #0055cc;
    --accent-hover: #003a99;
    --code-bg:      #f4f6f8;
    --quote-bg:     #f0f4ff;
    --quote-border: #0055cc;
    --table-head:   #f0f2f5;
    --header-bg:    #1a1a1a;
    --header-text:  #ffffff;
    --badge-bg:     #0055cc;
}

/* ---- リセット ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ---- ベース ---- */
html { scroll-behavior: smooth; }

body {
    font-family:
        -apple-system, BlinkMacSystemFont,
        'Hiragino Sans', 'Hiragino Kaku Gothic ProN',
        'Noto Sans JP', 'Meiryo', sans-serif;
    font-size: 16px;
    line-height: 1.85;
    color: var(--text);
    background: var(--bg);
}

/* ---- ヘッダー ---- */
.md-header {
    display: flex;
    align-items: center;
    gap: .75rem;
    background: var(--header-bg);
    color: var(--header-text);
    padding: .75rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.md-site-name {
    color: var(--header-text);
    text-decoration: none;
    font-weight: 700;
    font-size: .95rem;
    letter-spacing: .02em;
}
.md-site-name:hover { text-decoration: underline; }

/* ---- ナビゲーション（details/summary プルダウン） ---- */
.md-nav {
    margin-left: auto;
    position: relative;
}

/* summary — トリガーボタン */
.md-nav-summary {
    display: flex;
    align-items: center;
    gap: .4em;
    cursor: pointer;
    color: rgba(255,255,255,.85);
    font-size: .85rem;
    padding: .3em .8em;
    border-radius: 4px;
    border: 1px solid rgba(255,255,255,.25);
    list-style: none;
    user-select: none;
    white-space: nowrap;
    transition: background .15s;
}
.md-nav-summary::-webkit-details-marker { display: none; }
.md-nav-summary:hover { background: rgba(255,255,255,.12); }

.md-nav-icon { font-size: 1em; }

/* details[open] — ドロップダウン展開時 */
.md-nav-details[open] .md-nav-summary {
    background: rgba(255,255,255,.12);
}

/* ドロップダウンパネル */
.md-nav-items {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: calc(100% + .4rem);
    right: 0;
    min-width: 180px;
    background: #2a2a2a;
    border: 1px solid rgba(255,255,255,.12);
    border-radius: 6px;
    padding: .4rem 0;
    box-shadow: 0 4px 16px rgba(0,0,0,.35);
    z-index: 200;
}
.md-nav-items a {
    color: rgba(255,255,255,.82);
    text-decoration: none;
    font-size: .85rem;
    padding: .45em 1.1em;
    white-space: nowrap;
    transition: background .12s, color .12s;
}
.md-nav-items a:hover {
    background: rgba(255,255,255,.1);
    color: #fff;
}

.md-badge {
    font-size: .7rem;
    font-weight: 600;
    background: var(--badge-bg);
    color: #fff;
    padding: .2em .6em;
    border-radius: 3px;
    letter-spacing: .05em;
    text-transform: uppercase;
}

/* ---- 本文コンテナ ---- */
.markdown-body {
    max-width: 780px;
    margin: 0 auto;
    padding: 2.5rem 1.25rem 4rem;
}

/* ---- 見出し ---- */
.markdown-body h1 {
    font-size: 1.85rem;
    font-weight: 800;
    line-height: 1.3;
    margin: 2rem 0 1.25rem;
    padding-bottom: .5rem;
    border-bottom: 3px solid var(--border);
}
.markdown-body h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin: 2.5rem 0 .75rem;
    padding-bottom: .35rem;
    border-bottom: 1px solid var(--border);
}
.markdown-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin: 2rem 0 .5rem;
}
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
    font-size: 1rem;
    font-weight: 700;
    margin: 1.5rem 0 .4rem;
}

/* ---- 段落 ---- */
.markdown-body p {
    margin: .9rem 0;
}

/* ---- リンク ---- */
.markdown-body a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color .15s;
}
.markdown-body a:hover {
    color: var(--accent-hover);
    border-bottom-color: var(--accent-hover);
}

/* ---- リスト ---- */
.markdown-body ul,
.markdown-body ol {
    margin: .75rem 0 .75rem 1.6rem;
}
.markdown-body li {
    margin: .3rem 0;
}
.markdown-body li + li { margin-top: .2rem; }

/* ---- 引用 ---- */
.markdown-body blockquote {
    border-left: 4px solid var(--quote-border);
    background: var(--quote-bg);
    color: var(--muted);
    padding: .75rem 1.1rem;
    margin: 1.25rem 0;
    border-radius: 0 4px 4px 0;
    font-style: italic;
}

/* ---- コード（インライン） ---- */
.markdown-body code {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: .875em;
    background: var(--code-bg);
    padding: .15em .4em;
    border-radius: 4px;
    border: 1px solid var(--border);
}

/* ---- コードブロック ---- */
.markdown-body pre {
    background: #1e1e2e;
    color: #cdd6f4;
    padding: 1.1rem 1.25rem;
    border-radius: 6px;
    overflow-x: auto;
    margin: 1.25rem 0;
    line-height: 1.6;
}
.markdown-body pre code {
    font-size: .85em;
    background: transparent;
    border: none;
    padding: 0;
    color: inherit;
}

/* ---- 水平線 ---- */
.markdown-body hr {
    border: none;
    border-top: 2px solid var(--border);
    margin: 2.5rem 0;
}

/* ---- 画像 ---- */
.markdown-body img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: 4px;
    margin: 1rem 0;
}

/* ---- テーブル ---- */
.markdown-body table {
    border-collapse: collapse;
    width: 100%;
    margin: 1.25rem 0;
    font-size: .93rem;
}
.markdown-body th,
.markdown-body td {
    border: 1px solid var(--border);
    padding: .55rem .85rem;
    text-align: left;
    vertical-align: top;
}
.markdown-body th {
    background: var(--table-head);
    font-weight: 700;
}
.markdown-body tr:nth-child(even) td {
    background: #fafbfc;
}

/* ---- フッター ---- */
.md-footer {
    border-top: 1px solid var(--border);
    padding: 1.5rem 1rem;
    font-size: .85rem;
    color: var(--muted);
}
.md-footer > p {
    text-align: center;
}
.md-footer a {
    color: var(--accent);
    text-decoration: none;
}
.md-footer a:hover { text-decoration: underline; }

/* ---- フッター投稿一覧（アーカイブページのみ） ---- */
.md-footer-posts {
    max-width: 780px;
    margin: 0 auto 1.5rem;
}
.md-footer-posts h3 {
    font-size: .95rem;
    font-weight: 700;
    margin-bottom: .6rem;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    padding-bottom: .3rem;
}
.md-footer-posts ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: .3rem .75rem;
}
.md-footer-posts li {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: .5rem;
    padding: .25rem 0;
    border-bottom: 1px dotted var(--border);
    font-size: .85rem;
}
.md-footer-posts li a {
    color: var(--accent);
    text-decoration: none;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.md-footer-posts li a:hover { text-decoration: underline; }
.md-footer-date {
    color: var(--muted);
    font-size: .78rem;
    white-space: nowrap;
    flex-shrink: 0;
}

/* ---- レスポンシブ ---- */
@media (max-width: 600px) {
    .markdown-body { padding: 1.5rem .9rem 3rem; }
    .markdown-body h1 { font-size: 1.5rem; }
    .markdown-body h2 { font-size: 1.2rem; }
    .markdown-body pre { padding: .85rem 1rem; }
    .markdown-body table { font-size: .82rem; }
    .md-header { padding: .65rem 1rem; }
    .md-nav-items { right: auto; left: 0; }
}